小编CZY*_*ZYK的帖子

我从 onCreate() 方法运行以下代码。这段代码之外只是回调的许多对象声明和实例化。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    thisAct = this;
    display = (TextureView)findViewById(R.id.display);
    display.setSurfaceTextureListener(surfaceTextureListener);

    db = openOrCreateDatabase("MyDatabase", Context.MODE_PRIVATE, null);
    db.execSQL("CREATE TABLE IF NOT EXISTS Photos (ID INTEGER, location TEXT, size INTEGER)");
    db.execSQL("CREATE TABLE IF NOT EXISTS Tags (ID INTEGER, tag TEXT)");

    camMan = this.getSystemService(CameraManager.class);

    new Thread(new Runnable(){
        @Override
        public void run() {
            try {
                String cm = camMan.getCameraIdList()[0];

                if ( ContextCompat.checkSelfPermission(thisAct, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED ) {
                    ActivityCompat.requestPermissions((Activity)thisAct, new String[] { Manifest.permission.CAMERA }, CAMERA_REQUEST);
                }
                camMan.openCamera(cm, CDstateCallback, …