一旦發送相機意圖就會調用onActivityResult

Question

我正在使用相機意圖在我的應用程序中啟動相機，但一旦意圖被觸發， onActivityResult就會被解雇，我甚至還沒有拍照。

當我拍照時，選擇它並返回我的活動，根本不會調用onActivityResult

這是我如何啟動相機

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();
    }

為什么onActivityResult僅在相機意圖啟動后被調用？

Answer 1

問題是，在我的清單中，我將活動設置為singleInstance ，顯然startActivityForResult不喜歡