package safeluck.drive.evaluation.fragment;
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import android.Manifest;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.app.Dialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.pm.PackageManager;
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import android.content.res.Configuration;
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import android.graphics.ImageFormat;
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import android.graphics.Matrix;
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import android.graphics.Point;
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import android.graphics.RectF;
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import android.graphics.SurfaceTexture;
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import android.hardware.camera2.CameraAccessException;
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import android.hardware.camera2.CameraCaptureSession;
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import android.hardware.camera2.CameraCharacteristics;
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import android.hardware.camera2.CameraDevice;
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import android.hardware.camera2.CameraManager;
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import android.hardware.camera2.CameraMetadata;
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import android.hardware.camera2.CaptureRequest;
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import android.hardware.camera2.CaptureResult;
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import android.hardware.camera2.TotalCaptureResult;
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import android.hardware.camera2.params.StreamConfigurationMap;
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import android.media.Image;
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import android.media.ImageReader;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.HandlerThread;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.core.content.ContextCompat;
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import androidx.fragment.app.DialogFragment;
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import androidx.fragment.app.Fragment;
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import android.text.TextUtils;
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import android.util.Log;
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import android.util.SparseIntArray;
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import android.view.LayoutInflater;
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import android.view.Surface;
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import android.view.SurfaceView;
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import android.view.TextureView;
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import android.view.View;
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import android.view.ViewGroup;
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import android.util.Size;
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import android.widget.Toast;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.nio.ByteBuffer;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import java.util.concurrent.Semaphore;
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import java.util.concurrent.TimeUnit;
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import me.yokeyword.fragmentation.SupportFragment;
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import safeluck.drive.evaluation.R;
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import safeluck.drive.evaluation.customview.AutoFitTextureView;
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import com.anyun.basecommonlib.MyLog;
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/**
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* MyApplication2
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* Created by lzw on 2019/6/21. 16:58:29
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* 邮箱：632393724@qq.com
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* All Rights Saved! Chongqing AnYun Tech co. LTD
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*/
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public class TakePhotoFragment extends SupportFragment implements View.OnClickListener {
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private SurfaceView surfaceView;
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/**
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* 屏幕旋转到JPEG方向的旋转
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*/
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private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
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private static final int REQUEST_CAMERA_PERMISSION = 1;
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private static final String FRAGMENT_DIALOG = "dialog";
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static {
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ORIENTATIONS.append(Surface.ROTATION_0, 90);
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ORIENTATIONS.append(Surface.ROTATION_90, 0);
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ORIENTATIONS.append(Surface.ROTATION_180, 270);
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ORIENTATIONS.append(Surface.ROTATION_270, 180);
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}
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/**
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* Tag for the {@link Log}.
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*/
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private static final String TAG = "Camera2BasicFragment";
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/**
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* Camera state: 显示预览
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*/
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private static final int STATE_PREVIEW = 0;
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/**
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* Camera state: 等待聚焦锁定
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*/
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private static final int STATE_WAITING_LOCK = 1;
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/**
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* Camera state: Waiting for the exposure to be precapture state.
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*/
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private static final int STATE_WAITING_PRECAPTURE = 2;
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/**
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* Camera state: Waiting for the exposure state to be something other than precapture.
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*/
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private static final int STATE_WAITING_NON_PRECAPTURE = 3;
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/**
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* Camera state: 拍照
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*/
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private static final int STATE_PICTURE_TAKEN = 4;
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/**
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* Max preview width that is guaranteed by Camera2 API
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*/
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private static final int MAX_PREVIEW_WIDTH = 1920;
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/**
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* Max preview height that is guaranteed by Camera2 API
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*/
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private static final int MAX_PREVIEW_HEIGHT = 1080;
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/**
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* {@link TextureView.SurfaceTextureListener} handles several lifecycle events on a
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* {@link TextureView}.
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*/
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private final TextureView.SurfaceTextureListener mSurfaceTextureListener
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= new TextureView.SurfaceTextureListener() {
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@Override
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public void onSurfaceTextureAvailable(SurfaceTexture texture, int width, int height) {
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openCamera(width, height);
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}
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@Override
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public void onSurfaceTextureSizeChanged(SurfaceTexture texture, int width, int height) {
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configureTransform(width, height);
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}
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@Override
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public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) {
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return true;
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}
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@Override
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public void onSurfaceTextureUpdated(SurfaceTexture texture) {
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}
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};
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/**
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* ID of the current {@link CameraDevice}.
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*/
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private String mCameraId;
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/**
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* An {@link AutoFitTextureView} for camera preview.
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*/
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private AutoFitTextureView mTextureView;
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/**
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* A {@link CameraCaptureSession } for camera preview.
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*/
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private CameraCaptureSession mCaptureSession;
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/**
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* A reference to the opened {@link CameraDevice}.
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*/
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private CameraDevice mCameraDevice;
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/**
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* The {@link android.util.Size} of camera preview.
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*/
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private Size mPreviewSize;
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/**
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* {@link CameraDevice.StateCallback} is called when {@link CameraDevice} changes its state.
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*/
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private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() {
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@Override
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public void onOpened(@NonNull CameraDevice cameraDevice) {
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// This method is called when the camera is opened. We start camera preview here.
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MyLog.i(TAG,"Camera Device onOpened");
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mCameraOpenCloseLock.release();
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mCameraDevice = cameraDevice;
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createCameraPreviewSession();
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}
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@Override
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public void onDisconnected(@NonNull CameraDevice cameraDevice) {
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MyLog.i(TAG,"Camera Device onDisconnected");
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mCameraOpenCloseLock.release();
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cameraDevice.close();
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mCameraDevice = null;
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}
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@Override
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public void onError(@NonNull CameraDevice cameraDevice, int error) {
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MyLog.i(TAG,"Camera Device onError");
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mCameraOpenCloseLock.release();
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cameraDevice.close();
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mCameraDevice = null;
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Activity activity = getActivity();
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if (null != activity) {
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activity.finish();
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}
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}
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};
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/**
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* An additional thread for running tasks that shouldn't block the UI.
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*/
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private HandlerThread mBackgroundThread;
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/**
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* A {@link Handler} for running tasks in the background.
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*/
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private Handler mBackgroundHandler;
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/**
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* An {@link ImageReader} that handles still image capture.
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*/
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private ImageReader mImageReader;
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/**
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* This is the output file for our picture.
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*/
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private File mFile;
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/**
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* This a callback object for the {@link ImageReader}. "onImageAvailable" will be called when a
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* still image is ready to be saved.
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*/
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private final ImageReader.OnImageAvailableListener mOnImageAvailableListener
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= new ImageReader.OnImageAvailableListener() {
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@Override
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public void onImageAvailable(ImageReader reader) {
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mBackgroundHandler.post(new ImageSaver(reader.acquireNextImage(), mFile));
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}
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};
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/**
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* {@link CaptureRequest.Builder} for the camera preview
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*/
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private CaptureRequest.Builder mPreviewRequestBuilder;
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/**
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* {@link CaptureRequest} generated by {@link #mPreviewRequestBuilder}
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*/
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private CaptureRequest mPreviewRequest;
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/**
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* The current state of camera state for taking pictures.
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*
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* @see #mCaptureCallback
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*/
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private int mState = STATE_PREVIEW;
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/**
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* A {@link Semaphore} to prevent the app from exiting before closing the camera.
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*/
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private Semaphore mCameraOpenCloseLock = new Semaphore(1);
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/**
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* Whether the current camera device supports Flash or not.
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*/
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private boolean mFlashSupported;
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/**
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* Orientation of the camera sensor
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*/
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private int mSensorOrientation;
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/**
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* A {@link CameraCaptureSession.CaptureCallback} that handles events related to JPEG capture.
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*/
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private CameraCaptureSession.CaptureCallback mCaptureCallback
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= new CameraCaptureSession.CaptureCallback() {
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private void process(CaptureResult result) {
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switch (mState) {
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case STATE_PREVIEW: {
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// We have nothing to do when the camera preview is working normally.
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break;
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}
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case STATE_WAITING_LOCK: {
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Integer afState = result.get(CaptureResult.CONTROL_AF_STATE);
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if (afState == null) {
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captureStillPicture();
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} else if (CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED == afState ||
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CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED == afState) {
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// CONTROL_AE_STATE can be null on some devices
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Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
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if (aeState == null ||
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aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED) {
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mState = STATE_PICTURE_TAKEN;
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captureStillPicture();
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} else {
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runPrecaptureSequence();
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}
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}
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break;
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}
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case STATE_WAITING_PRECAPTURE: {
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// CONTROL_AE_STATE can be null on some devices
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Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
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if (aeState == null ||
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aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE ||
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aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED) {
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mState = STATE_WAITING_NON_PRECAPTURE;
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}
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break;
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}
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case STATE_WAITING_NON_PRECAPTURE: {
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// CONTROL_AE_STATE can be null on some devices
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Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
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if (aeState == null || aeState != CaptureResult.CONTROL_AE_STATE_PRECAPTURE) {
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mState = STATE_PICTURE_TAKEN;
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captureStillPicture();
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}
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break;
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}
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}
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}
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@Override
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public void onCaptureProgressed(@NonNull CameraCaptureSession session,
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@NonNull CaptureRequest request,
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@NonNull CaptureResult partialResult) {
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process(partialResult);
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}
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@Override
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public void onCaptureCompleted(@NonNull CameraCaptureSession session,
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@NonNull CaptureRequest request,
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@NonNull TotalCaptureResult result) {
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process(result);
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}
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};
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/**
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* Shows a {@link Toast} on the UI thread.
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*
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* @param text The message to show
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*/
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private void showToast(final String text) {
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final Activity activity = getActivity();
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if (activity != null) {
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activity.runOnUiThread(new Runnable() {
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@Override
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public void run() {
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Toast.makeText(activity, text, Toast.LENGTH_SHORT).show();
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}
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});
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}
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}
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/**
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* Given {@code choices} of {@code Size}s supported by a camera, choose the smallest one that
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* is at least as large as the respective texture view size, and that is at most as large as the
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* respective max size, and whose aspect ratio matches with the specified value. If such size
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* doesn't exist, choose the largest one that is at most as large as the respective max size,
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* and whose aspect ratio matches with the specified value.
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*
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* @param choices The list of sizes that the camera supports for the intended output
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* class
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* @param textureViewWidth The width of the texture view relative to sensor coordinate
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* @param textureViewHeight The height of the texture view relative to sensor coordinate
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* @param maxWidth The maximum width that can be chosen
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* @param maxHeight The maximum height that can be chosen
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* @param aspectRatio The aspect ratio
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* @return The optimal {@code Size}, or an arbitrary one if none were big enough
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*/
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private static Size chooseOptimalSize(Size[] choices, int textureViewWidth,
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int textureViewHeight, int maxWidth, int maxHeight, Size aspectRatio) {
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// Collect the supported resolutions that are at least as big as the preview Surface
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List<Size> bigEnough = new ArrayList<>();
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// Collect the supported resolutions that are smaller than the preview Surface
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List<Size> notBigEnough = new ArrayList<>();
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int w = aspectRatio.getWidth();
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int h = aspectRatio.getHeight();
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for (Size option : choices) {
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if (option.getWidth() <= maxWidth && option.getHeight() <= maxHeight &&
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option.getHeight() == option.getWidth() * h / w) {
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if (option.getWidth() >= textureViewWidth &&
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option.getHeight() >= textureViewHeight) {
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bigEnough.add(option);
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} else {
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notBigEnough.add(option);
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}
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}
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}
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// Pick the smallest of those big enough. If there is no one big enough, pick the
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// largest of those not big enough.
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if (bigEnough.size() > 0) {
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return Collections.min(bigEnough, new CompareSizesByArea());
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} else if (notBigEnough.size() > 0) {
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return Collections.max(notBigEnough, new CompareSizesByArea());
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} else {
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Log.e(TAG, "Couldn't find any suitable preview size");
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return choices[0];
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}
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}
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public static TakePhotoFragment newInstance(){
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TakePhotoFragment takePhotoFragment = new TakePhotoFragment();
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return takePhotoFragment;
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}
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@Nullable
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@Override
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public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
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View view = inflater.inflate(R.layout.layout_take_photo,container,false);
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return view;
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}
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@Override
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public void onViewCreated(final View view, Bundle savedInstanceState) {
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view.findViewById(R.id.picture).setOnClickListener(this);
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view.findViewById(R.id.info).setOnClickListener(this);
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mTextureView = (AutoFitTextureView) view.findViewById(R.id.texture);
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}
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@Override
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public void onActivityCreated(Bundle savedInstanceState) {
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super.onActivityCreated(savedInstanceState);
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mFile = new File(getActivity().getExternalFilesDir(null), "pic.jpg");
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}
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@Override
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public void onResume() {
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super.onResume();
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startBackgroundThread();
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// When the screen is turned off and turned back on, the SurfaceTexture is already
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// available, and "onSurfaceTextureAvailable" will not be called. In that case, we can open
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// a camera and start preview from here (otherwise, we wait until the surface is ready in
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// the SurfaceTextureListener).
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if (mTextureView.isAvailable()) {
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openCamera(mTextureView.getWidth(), mTextureView.getHeight());
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} else {
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mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
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}
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}
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@Override
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public void onPause() {
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closeCamera();
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stopBackgroundThread();
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super.onPause();
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}
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private void requestCameraPermission() {
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if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {
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new ConfirmationDialog().show(getChildFragmentManager(), FRAGMENT_DIALOG);
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} else {
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requestPermissions(new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
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}
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}
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@Override
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public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
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@NonNull int[] grantResults) {
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if (requestCode == REQUEST_CAMERA_PERMISSION) {
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if (grantResults.length != 1 || grantResults[0] != PackageManager.PERMISSION_GRANTED) {
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ErrorDialog.newInstance(getString(R.string.request_permission))
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.show(getChildFragmentManager(), FRAGMENT_DIALOG);
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}
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} else {
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super.onRequestPermissionsResult(requestCode, permissions, grantResults);
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}
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}
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/**
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* Sets up member variables related to camera.
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*
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* @param width The width of available size for camera preview
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* @param height The height of available size for camera preview
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*/
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@SuppressWarnings("SuspiciousNameCombination")
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private void setUpCameraOutputs(int width, int height) {
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Activity activity = getActivity();
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CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE);
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try {
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for (String cameraId : manager.getCameraIdList()) {
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CameraCharacteristics characteristics
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= manager.getCameraCharacteristics(cameraId);
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// We don't use a front facing camera in this sample.
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Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING);
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if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) {
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continue;
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}
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StreamConfigurationMap map = characteristics.get(
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CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
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if (map == null) {
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continue;
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}
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// For still image captures, we use the largest available size.
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Size largest = Collections.max(
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Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
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new CompareSizesByArea());
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mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),
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ImageFormat.JPEG, /*maxImages*/2);
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mImageReader.setOnImageAvailableListener(
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mOnImageAvailableListener, mBackgroundHandler);
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// Find out if we need to swap dimension to get the preview size relative to sensor
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// coordinate.
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int displayRotation = activity.getWindowManager().getDefaultDisplay().getRotation();
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MyLog.i(TAG,"displayRotation="+displayRotation);
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//noinspection ConstantConditions
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mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
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boolean swappedDimensions = false;
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switch (displayRotation) {
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case Surface.ROTATION_0:
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case Surface.ROTATION_180:
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if (mSensorOrientation == 90 || mSensorOrientation == 270) {
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swappedDimensions = true;
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}
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break;
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case Surface.ROTATION_90:
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case Surface.ROTATION_270:
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if (mSensorOrientation == 0 || mSensorOrientation == 180) {
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swappedDimensions = true;
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}
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break;
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default:
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Log.e(TAG, "Display rotation is invalid: " + displayRotation);
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}
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Point displaySize = new Point();
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activity.getWindowManager().getDefaultDisplay().getSize(displaySize);
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int rotatedPreviewWidth = width;
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int rotatedPreviewHeight = height;
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int maxPreviewWidth = displaySize.x;
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int maxPreviewHeight = displaySize.y;
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MyLog.i(TAG,"swappedDimensions="+swappedDimensions);
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if (swappedDimensions) {
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rotatedPreviewWidth = height;
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rotatedPreviewHeight = width;
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maxPreviewWidth = displaySize.y;
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maxPreviewHeight = displaySize.x;
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}
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if (maxPreviewWidth > MAX_PREVIEW_WIDTH) {
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maxPreviewWidth = MAX_PREVIEW_WIDTH;
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}
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if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) {
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maxPreviewHeight = MAX_PREVIEW_HEIGHT;
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}
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// Danger, W.R.! Attempting to use too large a preview size could exceed the camera
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// bus' bandwidth limitation, resulting in gorgeous previews but the storage of
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// garbage capture data.
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mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
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rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
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maxPreviewHeight, largest);
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MyLog.i(TAG,"chooseOptimalSize="+mPreviewSize.getWidth()+":"+mPreviewSize.getHeight());
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// We fit the aspect ratio of TextureView to the size of preview we picked.
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int orientation = getResources().getConfiguration().orientation;
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MyLog.i(TAG,"getResources().getConfiguration().orientation="+orientation);
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if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
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mTextureView.setAspectRatio(
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mPreviewSize.getWidth(), mPreviewSize.getHeight());
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} else {
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mTextureView.setAspectRatio(
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mPreviewSize.getHeight(), mPreviewSize.getWidth());
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}
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// Check if the flash is supported.
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Boolean available = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
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mFlashSupported = available == null ? false : available;
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mCameraId = cameraId;
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MyLog.i(TAG,"CameraID="+mCameraId+ " FlashSupported="+mFlashSupported);
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return;
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}
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} catch (CameraAccessException e) {
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e.printStackTrace();
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} catch (NullPointerException e) {
|
// Currently an NPE is thrown when the Camera2API is used but not supported on the
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// device this code runs.
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ErrorDialog.newInstance(getString(R.string.camera_error))
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.show(getChildFragmentManager(), FRAGMENT_DIALOG);
|
}
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}
|
|
/**
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* 根据cameraId打开Camera
|
*/
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private void openCamera(int width, int height) {
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if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA)
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!= PackageManager.PERMISSION_GRANTED) {
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requestCameraPermission();
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return;
|
}
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setUpCameraOutputs(width, height);
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configureTransform(width, height);
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Activity activity = getActivity();
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CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE);
|
try {
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if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) {
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throw new RuntimeException("Time out waiting to lock camera opening.");
|
}
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if(!TextUtils.isEmpty(mCameraId)){
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manager.openCamera(mCameraId, mStateCallback, mBackgroundHandler);
|
}else{
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MyLog.i(TAG,"CameraID--null");
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|
}
|
} catch (CameraAccessException e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
|
throw new RuntimeException("Interrupted while trying to lock camera opening.", e);
|
}
|
}
|
|
/**
|
* Closes the current {@link CameraDevice}.
|
*/
|
private void closeCamera() {
|
try {
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mCameraOpenCloseLock.acquire();
|
if (null != mCaptureSession) {
|
mCaptureSession.close();
|
mCaptureSession = null;
|
}
|
if (null != mCameraDevice) {
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mCameraDevice.close();
|
mCameraDevice = null;
|
}
|
if (null != mImageReader) {
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mImageReader.close();
|
mImageReader = null;
|
}
|
} catch (InterruptedException e) {
|
throw new RuntimeException("Interrupted while trying to lock camera closing.", e);
|
} finally {
|
mCameraOpenCloseLock.release();
|
}
|
}
|
|
/**
|
* Starts a background thread and its {@link Handler}.
|
*/
|
private void startBackgroundThread() {
|
mBackgroundThread = new HandlerThread("CameraBackground");
|
mBackgroundThread.start();
|
mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
|
}
|
|
/**
|
* Stops the background thread and its {@link Handler}.
|
*/
|
private void stopBackgroundThread() {
|
mBackgroundThread.quitSafely();
|
try {
|
mBackgroundThread.join();
|
mBackgroundThread = null;
|
mBackgroundHandler = null;
|
} catch (InterruptedException e) {
|
e.printStackTrace();
|
}
|
}
|
|
/**
|
* Creates a new {@link CameraCaptureSession} for camera preview.
|
*/
|
private void createCameraPreviewSession() {
|
try {
|
SurfaceTexture texture = mTextureView.getSurfaceTexture();
|
assert texture != null;
|
|
// We configure the size of default buffer to be the size of camera preview we want.
|
texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
|
|
// This is the output Surface we need to start preview.
|
Surface surface = new Surface(texture);
|
|
// We set up a CaptureRequest.Builder with the output Surface.
|
mPreviewRequestBuilder
|
= mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
|
mPreviewRequestBuilder.addTarget(surface);
|
|
// Here, we create a CameraCaptureSession for camera preview.
|
mCameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface()),
|
new CameraCaptureSession.StateCallback() {
|
|
@Override
|
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
|
// The camera is already closed
|
if (null == mCameraDevice) {
|
return;
|
}
|
|
// When the session is ready, we start displaying the preview.
|
mCaptureSession = cameraCaptureSession;
|
try {
|
// Auto focus should be continuous for camera preview.
|
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE,
|
CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
|
// Flash is automatically enabled when necessary.
|
setAutoFlash(mPreviewRequestBuilder);
|
|
// Finally, we start displaying the camera preview.
|
mPreviewRequest = mPreviewRequestBuilder.build();
|
mCaptureSession.setRepeatingRequest(mPreviewRequest,
|
mCaptureCallback, mBackgroundHandler);
|
} catch (CameraAccessException e) {
|
e.printStackTrace();
|
}
|
}
|
|
@Override
|
public void onConfigureFailed(
|
@NonNull CameraCaptureSession cameraCaptureSession) {
|
showToast("Failed");
|
}
|
}, null
|
);
|
} catch (CameraAccessException e) {
|
e.printStackTrace();
|
}
|
}
|
|
/**
|
* Configures the necessary {@link android.graphics.Matrix} transformation to `mTextureView`.
|
* This method should be called after the camera preview size is determined in
|
* setUpCameraOutputs and also the size of `mTextureView` is fixed.
|
*
|
* @param viewWidth The width of `mTextureView`
|
* @param viewHeight The height of `mTextureView`
|
*/
|
private void configureTransform(int viewWidth, int viewHeight) {
|
Activity activity = getActivity();
|
if (null == mTextureView || null == mPreviewSize || null == activity) {
|
return;
|
}
|
int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
|
Matrix matrix = new Matrix();
|
RectF viewRect = new RectF(0, 0, viewWidth, viewHeight);
|
RectF bufferRect = new RectF(0, 0, mPreviewSize.getHeight(), mPreviewSize.getWidth());
|
float centerX = viewRect.centerX();
|
float centerY = viewRect.centerY();
|
MyLog.i(TAG,"configureTransform centerX="+centerX+" CenterY="+centerY+" getDefaultDisplay().getRotation()="+rotation);
|
if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) {
|
bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY());
|
matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL);
|
float scale = Math.max(
|
(float) viewHeight / mPreviewSize.getHeight(),
|
(float) viewWidth / mPreviewSize.getWidth());
|
matrix.postScale(scale, scale, centerX, centerY);
|
matrix.postRotate(90 * (rotation - 2), centerX, centerY);
|
} else if (Surface.ROTATION_180 == rotation) {
|
matrix.postRotate(180, centerX, centerY);
|
}
|
mTextureView.setTransform(matrix);
|
}
|
|
/**
|
* Initiate a still image capture.
|
*/
|
private void takePicture() {
|
lockFocus();
|
}
|
|
/**
|
* Lock the focus as the first step for a still image capture.
|
*/
|
private void lockFocus() {
|
try {
|
// This is how to tell the camera to lock focus.
|
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
|
CameraMetadata.CONTROL_AF_TRIGGER_START);
|
// Tell #mCaptureCallback to wait for the lock.
|
mState = STATE_WAITING_LOCK;
|
mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback,
|
mBackgroundHandler);
|
} catch (CameraAccessException e) {
|
e.printStackTrace();
|
}
|
}
|
|
/**
|
* Run the precapture sequence for capturing a still image. This method should be called when
|
* we get a response in {@link #mCaptureCallback} from {@link #lockFocus()}.
|
*/
|
private void runPrecaptureSequence() {
|
try {
|
// This is how to tell the camera to trigger.
|
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER,
|
CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER_START);
|
// Tell #mCaptureCallback to wait for the precapture sequence to be set.
|
mState = STATE_WAITING_PRECAPTURE;
|
mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback,
|
mBackgroundHandler);
|
} catch (CameraAccessException e) {
|
e.printStackTrace();
|
}
|
}
|
|
/**
|
* Capture a still picture. This method should be called when we get a response in
|
* {@link #mCaptureCallback} from both {@link #lockFocus()}.
|
*/
|
private void captureStillPicture() {
|
try {
|
final Activity activity = getActivity();
|
if (null == activity || null == mCameraDevice) {
|
return;
|
}
|
// This is the CaptureRequest.Builder that we use to take a picture.
|
final CaptureRequest.Builder captureBuilder =
|
mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
|
captureBuilder.addTarget(mImageReader.getSurface());
|
|
// Use the same AE and AF modes as the preview.
|
captureBuilder.set(CaptureRequest.CONTROL_AF_MODE,
|
CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
|
setAutoFlash(captureBuilder);
|
|
// Orientation
|
int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
|
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, getOrientation(rotation));
|
|
CameraCaptureSession.CaptureCallback CaptureCallback
|
= new CameraCaptureSession.CaptureCallback() {
|
|
@Override
|
public void onCaptureCompleted(@NonNull CameraCaptureSession session,
|
@NonNull CaptureRequest request,
|
@NonNull TotalCaptureResult result) {
|
showToast("Saved: " + mFile);
|
Log.d(TAG, mFile.toString());
|
unlockFocus();
|
}
|
};
|
|
mCaptureSession.stopRepeating();
|
mCaptureSession.abortCaptures();
|
mCaptureSession.capture(captureBuilder.build(), CaptureCallback, null);
|
} catch (CameraAccessException e) {
|
e.printStackTrace();
|
}
|
}
|
|
/**
|
* Retrieves the JPEG orientation from the specified screen rotation.
|
*
|
* @param rotation The screen rotation.
|
* @return The JPEG orientation (one of 0, 90, 270, and 360)
|
*/
|
private int getOrientation(int rotation) {
|
// Sensor orientation is 90 for most devices, or 270 for some devices (eg. Nexus 5X)
|
// We have to take that into account and rotate JPEG properly.
|
// For devices with orientation of 90, we simply return our mapping from ORIENTATIONS.
|
// For devices with orientation of 270, we need to rotate the JPEG 180 degrees.
|
return (ORIENTATIONS.get(rotation) + mSensorOrientation + 270) % 360;
|
}
|
|
/**
|
* Unlock the focus. This method should be called when still image capture sequence is
|
* finished.
|
*/
|
private void unlockFocus() {
|
try {
|
// Reset the auto-focus trigger
|
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
|
CameraMetadata.CONTROL_AF_TRIGGER_CANCEL);
|
setAutoFlash(mPreviewRequestBuilder);
|
mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback,
|
mBackgroundHandler);
|
// After this, the camera will go back to the normal state of preview.
|
mState = STATE_PREVIEW;
|
mCaptureSession.setRepeatingRequest(mPreviewRequest, mCaptureCallback,
|
mBackgroundHandler);
|
} catch (CameraAccessException e) {
|
e.printStackTrace();
|
}
|
}
|
|
@Override
|
public void onClick(View view) {
|
switch (view.getId()) {
|
case R.id.picture: {
|
takePicture();
|
break;
|
}
|
case R.id.info: {
|
Activity activity = getActivity();
|
if (null != activity) {
|
new AlertDialog.Builder(activity)
|
.setMessage("简单介绍")
|
.setPositiveButton(android.R.string.ok, null)
|
.show();
|
}
|
break;
|
}
|
}
|
}
|
|
private void setAutoFlash(CaptureRequest.Builder requestBuilder) {
|
if (mFlashSupported) {
|
requestBuilder.set(CaptureRequest.CONTROL_AE_MODE,
|
CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH);
|
}
|
}
|
|
/**
|
* Saves a JPEG {@link Image} into the specified {@link File}.
|
*/
|
private static class ImageSaver implements Runnable {
|
|
|
private final Image mImage;
|
|
private final File mFile;
|
|
ImageSaver(Image image, File file) {
|
mImage = image;
|
mFile = file;
|
}
|
|
@Override
|
public void run() {
|
ByteBuffer buffer = mImage.getPlanes()[0].getBuffer();
|
byte[] bytes = new byte[buffer.remaining()];
|
buffer.get(bytes);
|
FileOutputStream output = null;
|
try {
|
output = new FileOutputStream(mFile);
|
output.write(bytes);
|
} catch (Exception e) {
|
e.printStackTrace();
|
} finally {
|
mImage.close();
|
if (null != output) {
|
try {
|
output.close();
|
} catch (Exception e) {
|
e.printStackTrace();
|
}
|
}
|
}
|
}
|
|
}
|
|
/**
|
* Compares two {@code Size}s based on their areas.
|
*/
|
static class CompareSizesByArea implements Comparator<Size> {
|
|
@Override
|
public int compare(Size lhs, Size rhs) {
|
// We cast here to ensure the multiplications won't overflow
|
return Long.signum((long) lhs.getWidth() * lhs.getHeight() -
|
(long) rhs.getWidth() * rhs.getHeight());
|
}
|
|
}
|
|
/**
|
* Shows an error message dialog.
|
*/
|
public static class ErrorDialog extends DialogFragment {
|
|
private static final String ARG_MESSAGE = "message";
|
|
public static ErrorDialog newInstance(String message) {
|
ErrorDialog dialog = new ErrorDialog();
|
Bundle args = new Bundle();
|
args.putString(ARG_MESSAGE, message);
|
dialog.setArguments(args);
|
return dialog;
|
}
|
|
@NonNull
|
@Override
|
public Dialog onCreateDialog(Bundle savedInstanceState) {
|
final Activity activity = getActivity();
|
return new AlertDialog.Builder(activity)
|
.setMessage(getArguments().getString(ARG_MESSAGE))
|
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
|
@Override
|
public void onClick(DialogInterface dialogInterface, int i) {
|
activity.finish();
|
}
|
})
|
.create();
|
}
|
|
}
|
|
/**
|
* Shows OK/Cancel confirmation dialog about camera permission.
|
*/
|
public static class ConfirmationDialog extends DialogFragment {
|
|
@NonNull
|
@Override
|
public Dialog onCreateDialog(Bundle savedInstanceState) {
|
final Fragment parent = getParentFragment();
|
return new AlertDialog.Builder(getActivity())
|
.setMessage(R.string.request_permission)
|
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
|
@Override
|
public void onClick(DialogInterface dialog, int which) {
|
parent.requestPermissions(new String[]{Manifest.permission.CAMERA},
|
REQUEST_CAMERA_PERMISSION);
|
}
|
})
|
.setNegativeButton(android.R.string.cancel,
|
new DialogInterface.OnClickListener() {
|
@Override
|
public void onClick(DialogInterface dialog, int which) {
|
Activity activity = parent.getActivity();
|
if (activity != null) {
|
activity.finish();
|
}
|
}
|
})
|
.create();
|
}
|
}
|
|
}
|
