package safeluck.drive.evaluation.fragment;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.Path;
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import android.os.Bundle;
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import android.util.Log;
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import android.view.LayoutInflater;
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import android.view.SurfaceHolder;
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import android.view.SurfaceView;
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import android.view.View;
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import android.view.ViewGroup;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import me.yokeyword.fragmentation.SupportFragment;
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public class RoadDriveMapFragment extends SupportFragment implements SurfaceHolder.Callback {
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private static final String TAG = RoadDriveMapFragment.class.getSimpleName();
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private SurfaceView mSurfaceView;
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private SurfaceHolder mSurfaceHolder;
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private boolean flag = false;//控制绘制线程drawThread
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private Canvas mCanvas;
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private Paint mPaint;
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private Path mPath;
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private int avaliableWidth,avaliableHeight;
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private int x = 50, y = 50, r = 10; // 圆的坐标和半径
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private ExecutorService generateData = Executors.newSingleThreadExecutor();//产生数据（主要是车辆数据）
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private ExecutorService drawThread = Executors.newSingleThreadExecutor();//绘制线程
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public static RoadDriveMapFragment newInstance(){
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return new RoadDriveMapFragment();
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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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mSurfaceView = new SurfaceView(_mActivity);
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ViewGroup.LayoutParams layoutParams = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT);
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mSurfaceView.setLayoutParams(layoutParams);
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mSurfaceView.getHolder().addCallback(this);
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mSurfaceHolder = mSurfaceView.getHolder();
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avaliableHeight = mSurfaceView.getHeight();
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avaliableWidth = mSurfaceView.getWidth();
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Log.i(TAG,"可用宽度="+avaliableWidth+"可用高度="+avaliableHeight);
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mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
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mPath = new Path();
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return mSurfaceView;
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}
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@Override
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public void surfaceCreated(SurfaceHolder holder) {
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drawThread.execute(new DrawRunnable());
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}
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@Override
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public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
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}
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@Override
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public void surfaceDestroyed(SurfaceHolder holder) {
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flag = false;
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}
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/**
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* 主要是这个方法，进行坐标点计算，使用mPath画图，可能要用到Canvas
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* 最好只使用path
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*/
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private void calculate() {
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mPath.addCircle(x,y,r, Path.Direction.CCW);
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}
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/**
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* 绘制
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*/
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private void drawMap() {
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try {
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//获得canvas对象
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mCanvas = mSurfaceHolder.lockCanvas();
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//绘制背景
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mCanvas.drawColor(Color.WHITE);
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//绘制路径
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mCanvas.drawPath(mPath, mPaint);
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}catch (Exception e){
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}finally {
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if (mCanvas != null){
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//释放canvas对象并提交画布
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mSurfaceHolder.unlockCanvasAndPost(mCanvas);
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}
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}
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}
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class DrawRunnable implements Runnable{
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@Override
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public void run() {
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while(flag){
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drawMap();
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calculate();
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try {
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Thread.sleep(50);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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}
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}
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