onActivityResult()没有在DialogFragment中执行

Question

我一直在寻找千篇文章,但我找不到如何解决我的问题.

我有一个ImageView.当用户单击此ImageView时,将显示DialogFragment,用户可以选择在相机上拍摄新照片,也可以从库中选择照片.直到这里一切正常.

问题是,用户选择的图片应该替换ImageView中的当前图片,但是这个位是不起作用的,因为执行此代码的onActivityResult()函数没有被执行,所以ImageView中的图像始终保持不变.我会感激任何帮助,因为我没有看到或理解,为什么这个代码没有被执行.

我在用户选择图像后立即在LogCat中收到警告:

05-07 12:17:11.542: I/ActivityManager(59): Displayed activity com.android.gallery/com.android.camera.ImageGallery: 935 ms (total 935 ms)

05-07 12:17:12.812: W/FragmentActivity(3614): Activity result no fragment exists for index: 0x10001

05-07 12:17:12.862: W/InputManagerService(59): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@45fd9c38 (uid=10016 pid=317)

Activity.java:

private ImageView imageLoader = null;
imageLoader = (ImageView) findViewById(R.id.f_imageLoader);        
imageLoader.setOnClickListener(new View.OnClickListener() {
    public void onClick(View view) {
        ImageLoaderDialog imageLoaderDialog = new ImageLoaderDialog(imageLoader);
        imageLoaderDialog.show(getSupportFragmentManager(), "imageLoaderDialog");
}

Activity.xml:

<ImageView
    android:id="@+id/f_imageLoader"
android:layout_width="wrap_content"
    android:layout_height="0dip"
    android:layout_weight="0.20"
android:contentDescription="@string/imgDesc"
    android:src="@drawable/my_image" />

ImageLoaderDialog.java:

//Dialog for choosing between new camera image or gallery image.
public class ImageLoaderDialog extends android.support.v4.app.DialogFragment {
    private ImageView targetImageView = null;
    final int TAKE_PICTURE = 0;
    final int PICK_PHOTO = 1;

    public ImageLoaderDialog (View view) {
        targetImageView = (ImageView) view;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setTitle("Selecciona");
        final String[] imageSources = getResources().getStringArray(R.array.imageSources);
        builder.setItems(imageSources, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int item) {
                switch(item) {
                    case TAKE_PICTURE:
                        Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                        startActivityForResult(takePicture, TAKE_PICTURE);
                        break;
                    case PICK_PHOTO:
                        Intent pickPhoto = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                        startActivityForResult(pickPhoto, PICK_PHOTO);
                        break;
                }
            }
        });
        return builder.create();
    }

//Set image to user's selected image.
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    super.onActivityResult(requestCode, resultCode, intent);
    if (resultCode == android.app.Activity.RESULT_OK) {
        Uri selectedImage = intent.getData();
        Log.i("IMAGEN", ""+selectedImage);
        targetImageView.setImageURI(selectedImage);
    }  
}
}

任何帮助将非常感激.

Answer 1

托管活动覆盖了 onActivityResult，但没有调用 super.onActivityResult 来获取未处理的结果代码。显然，即使片段是调用 startActivityForResult 的片段，活动也会首先处理结果。当您考虑片段的模块化时，这是有道理的。一旦我为所有未处理的结果实现了 super.onActivityResult，片段就可以尝试处理结果。试试这个：

getActivity().onActivityResult(requestCode, resultCode, intent);