一旦发送相机意图就会调用onActivityResult

Question

我正在使用相机意图在我的应用程序中启动相机，但一旦意图被触发， onActivityResult就会被解雇，我甚至还没有拍照。

当我拍照时，选择它并返回我的活动，根本不会调用onActivityResult

这是我如何启动相机

PackageManager pm = getPackageManager();
    if (pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
        Intent camera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        File tempDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),"Mobile Map");
        if (!tempDir.exists()) {
            if (!tempDir.mkdir()) {
                Toast.makeText(this,
                        "Please check SD card! Image shot is impossible!",
                        Toast.LENGTH_SHORT).show();
            }
        }

        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",Locale.US).format(new Date());
        File mediaFile = new File(tempDir.getPath() + File.separator+ "IMG_" + timeStamp + ".jpg");

        photoUri = Uri.fromFile(mediaFile);
        camera.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
        startActivityForResult(camera, CAMERA_REQUEST);
    } else {
        Toast.makeText(this,"This device does not have a rear facing camera",Toast.LENGTH_SHORT).show();
    }

为什么onActivityResult仅在相机意图启动后被调用？

Answer 1

问题是，在我的清单中，我将活动设置为singleInstance ，显然startActivityForResult不喜欢