打开相机并通过Android测试保存到ImageView

Question

在我的代码中，相机应该拍照并将其保存在ImageView中。它一直很好，直到将图片保存到ImageView。它没有显示！

有我的错误：

这是我的代码：

public class MainActivity extends AppCompatActivity {

static final int REQUESTED_IMAGE_CAPTURE=1;
ImageView output;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button shot=(Button)findViewById(R.id.button);
    output=(ImageView)findViewById(R.id.imageView);

    if(!hasCamera())
        shot.setEnabled(false);
}
private boolean hasCamera(){
    return getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY);
}

public void lanch_camera(View view){
    Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(intent,REQUESTED_IMAGE_CAPTURE);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode==REQUESTED_IMAGE_CAPTURE && resultCode ==RESULT_OK){
        Bundle extras=data.getExtras();
        Bitmap pic=(Bitmap) extras.get("data");
        output.setImageBitmap(pic);
    }
}
}

请帮帮我。感谢。