删除数据库升级方法；插入数据库改到Activity，否则application insert会报错；

lizhanwei

2020-01-08 12c468b38b46e61f9c2dcec27684e9ea1d54adcf

 app/src/main/java/safeluck/drive/evaluation/DB/WorkRoomDataBase.java

@@ -47,13 +47,13 @@
    private static final int NUMBER_OF_THREADS = 4;

    public static final ExecutorService dataBaseWriteExecutor = Executors.newFixedThreadPool(NUMBER_OF_THREADS);
    static Migration migration = new Migration(1,2) {
        @Override
        public void migrate(@NonNull SupportSQLiteDatabase database) {
            database.execSQL("alter table student_table ADD  COLUMN begin_time INTEGER NOT NULL DEFAULT 0");
        }
    };
private static final Migration[] ALL_MIGRATIONS = new Migration[]{migration};
//    static Migration migration = new Migration(1,2) {
//        @Override
//        public void migrate(@NonNull SupportSQLiteDatabase database) {
//            database.execSQL("alter table student_table ADD  COLUMN begin_time INTEGER NOT NULL DEFAULT 0");
//        }
//    };
//private static final Migration[] ALL_MIGRATIONS = new Migration[]{migration};


     public static WorkRoomDataBase getWorkRoomDataBase(final Context mContext){
@@ -63,15 +63,15 @@
                if (workRoomDataBase == null){
                    Log.i(TAG, "getWorkRoomDataBase==null ");
                    workRoomDataBase = Room.databaseBuilder(mContext.getApplicationContext(),WorkRoomDataBase.class,"work_database")
                            .addMigrations(ALL_MIGRATIONS)
//                            .addMigrations(ALL_MIGRATIONS)
                            .addCallback(new Callback() {
                                @Override
                                public void onCreate(@NonNull SupportSQLiteDatabase db) {
                                    super.onCreate(db);
                                    OneTimeWorkRequest oneTimeWorkRequest = OneTimeWorkRequest.from(SeedDatabaseWorker.class);
                                    OneTimeWorkRequest oneTimeWorkRequest1 = OneTimeWorkRequest.from(CriteriaForIWorker.class);
                                    OneTimeWorkRequest oneTimeWorkRequest2 = OneTimeWorkRequest.from(FailedProjWorker.class);
                                    OneTimeWorkRequest oneTimeWorkRequest3 = OneTimeWorkRequest.from(CriteriaForIIWorker.class);
                                    OneTimeWorkRequest oneTimeWorkRequest2 = OneTimeWorkRequest.from(FailedProjWorker.class);
                                    Log.i(TAG, "onCreate: 创建数据库后建立数据表插入数据");
                                    WorkManager.getInstance(mContext).enqueue(oneTimeWorkRequest);
                                    WorkManager.getInstance(mContext).enqueue(oneTimeWorkRequest1);