当相机活动返回时,承载这个片段的活动有它的onActivityResult被调用。

我的片段开始一个活动的结果与意图发送给相机拍照。图片应用程序加载正常,拍摄照片并返回。然而onActivityResult从未被击中。我设置了断点,但什么都没有触发。一个片段可以有onActivityResult吗?我想是的,因为它是一个已提供的函数。为什么这个没有被触发?

ImageView myImage = (ImageView)inflatedView.findViewById(R.id.image);
myImage.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(cameraIntent, 1888);
    }
});

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if( requestCode == 1888 ) {
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        ((ImageView)inflatedView.findViewById(R.id.image)).setImageBitmap(photo);
    }
}

当前回答

其他答案中没有描述的另一个用例:

当使用exception.startResolutionForResult()时,在fragment中声明的onActivityResult()不会被调用:

if (exception is ResolvableApiException) {
    exception.startResolutionForResult(activity!!, MY_REQUEST_CODE)
}

在这种情况下,将exception.startResolutionForResult()替换为fragment的startIntentSenderForResult():

if (exception is ResolvableApiException) {
    startIntentSenderForResult(exception.resolution.intentSender, MY_REQUEST_CODE, null, 0, 0, 0, null)
}

其他回答

从@Mohit Mehta获得帮助,如果你正在使用导航组件,这可能会帮助你。这对我很有效。

在MainActivity的onActivityResult方法中粘贴以下代码:

for (Fragment fragment : navHostFragment.getChildFragmentManager().getFragments()){
        if (fragment != null){
            Log.d(TAG, "onResult Has Been Sent!");
            fragment.onActivityResult(requestCode, resultCode, data);
        }
    }

在YOUR FRAGMENT的onActivityResult方法中,你可以得到结果。 希望这对你有所帮助。

public class takeimage extends Fragment {

    private Uri mImageCaptureUri;
    private static final int PICK_FROM_CAMERA = 1;
    private static final int PICK_FROM_FILE = 2;
    private String mPath;
    private ImageView mImageView;
    Bitmap bitmap = null;
    View view;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.activity_send_image, container, false);
        final String[] items = new String[] { "From Camera", "From SD Card" };
        mImageView = (ImageView)view.findViewById(R.id.iv_pic);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.select_dialog_item, items);
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setTitle("Select Image");

        builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int item) {
                if (item == 0) {
                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    File file = new File(Environment.getExternalStorageDirectory(), "tmp_avatar_"
                        + String.valueOf(System.currentTimeMillis())
                        + ".jpg");
                    mImageCaptureUri = Uri.fromFile(file);

                    try {
                        intent.putExtra(
                            android.provider.MediaStore.EXTRA_OUTPUT,
                            mImageCaptureUri);
                        intent.putExtra("return-data", true);

                        getActivity().startActivityForResult(intent,
                            PICK_FROM_CAMERA);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                    dialog.cancel();
                } else {
                    Intent intent = new Intent();

                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);

                    getActivity().startActivityForResult(
                        Intent.createChooser(intent,
                            "Complete action using"), PICK_FROM_FILE);
                }
            }
        });
        final AlertDialog dialog = builder.create();

        Button show = (Button) view.findViewById(R.id.btn_choose);
        show.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // Switch the tab content to display the list view.
                dialog.show();
            }
        });

    return view;
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (resultCode != Activity.RESULT_OK)
            return;

        if (requestCode == PICK_FROM_FILE) {
            mImageCaptureUri = data.getData();
            // mPath = getRealPathFromURI(mImageCaptureUri); //from Gallery

            if (mPath == null)
                mPath = mImageCaptureUri.getPath(); // from File Manager

            if (mPath != null)
                bitmap = BitmapFactory.decodeFile(mPath);
        } else {
            mPath = mImageCaptureUri.getPath();
            bitmap = BitmapFactory.decodeFile(mPath);
        }
        mImageView.setImageBitmap(bitmap);  
    }

    public String getRealPathFromURI(Uri contentUri) {
        String [] proj = {MediaStore.Images.Media.DATA};
        Cursor cursor = managedQuery(contentUri, proj, null, null,null);

        if (cursor == null) return null;

        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }
} 

我只是做了一个变通方法:

public static Fragment _tempFragment = null;
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(_tempFragment != null)
        _tempFragment.onActivityResult(requestCode, resultCode, data);
}

在Fragment中,在startActivityResult之前,设置

MainActivity._tempFragment = this;

在片段中的onActivityResult <——之后

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
     super.onActivityResult(requestCode, resultCode, data);

     // Do your job
     {

     }
     MainActivity._tempFragment = null;
}

原来的帖子。

FragmentActivity用修改过的requestCode替换requestCode。之后,当onActivityResult()将被调用时,FragmentActivity将解析较高的16位并恢复原始Fragment的索引。看看这个方案:

如果在根级别上有一些片段,就没有问题。但是如果你有嵌套的片段,比如在ViewPager里面有几个标签的片段,你肯定会遇到问题(或者已经遇到了)。

因为只有一个索引存储在requestCode中。这是Fragment在FragmentManager中的索引。当我们使用嵌套片段时,会有子片段管理器,它们有自己的片段列表。因此,有必要保存从根FragmentManager开始的整个索引链。

我们如何解决这个问题?在这篇文章中有一个常见的变通方案。

GitHub: https://github.com/shamanland/nested-fragment-issue

最简单的方法之一是从你的片段开始一个活动。

startActivity(ActivityName);

然后,添加你调用startActivityForResult(intent,"1");在你的Activity中添加onActivityResult

startActivityForResult(intent,"1");

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.dualPane);
    fragment.onActivityResult(requestCode, resultCode, data);
// perform other activity result like fetching from Uris or handling cursors

finish(); // finish the activity will  get to back to your fragment.
}