Question

我是Android的初学者。

我将从相机和文件浏览器制作图像选择器。

我发现了谷歌搜索的示例代码。

但捕获后，它不会调用onActivityResult()方法。

所以我无法处理捕获结果。

注意：我正在处理Fragment。

public void selectImage(){
final String [] items = new String [] {"Take Photo", "Choose Photo"};
        ArrayAdapter<String> adapter = new ArrayAdapter<String> (getActivity(), android.R.layout.select_dialog_item, items);
        AlertDialog.Builder builder  = new AlertDialog.Builder(getActivity());
        builder.setTitle("Add/Change Photo");
        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);

                        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();
        dialog.show();
    }

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

        // TODO Fix no activity available
        if (resultCode != getActivity().RESULT_OK)
            return;
        Bitmap bitmap   = null;
        String path     = "";
        if (requestCode == PICK_FROM_FILE) {
            mImageCaptureUri = data.getData();
            path = getRealPathFromURI(mImageCaptureUri); // From Gallery

            if (path == null)
                path = mImageCaptureUri.getPath(); // From File Manager

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

        imgProfile.setImageBitmap(bitmap);
        super.onActivityResult(requestCode, resultCode, data);
    }

Answer 1

调用getActivity().startActivityForResult()会在托管片段的活动上调用 onActivityResult（），而不是 onActivityResult（） 片段自我。

如果您想在片段本身中调用 onActivityResult（）

startActivityForResult(Intent.createChooser(intent, "Complete action using"), PICK_FROM_FILE);

如果你想处理它，你需要调用的活动：

getActivity().startActivityForResult(Intent.createChooser(intent, "Complete action using"),  PICK_FROM_FILE);

此外，您可能希望将onActivityResult（）重新组织为

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

        // TODO Fix no activity available
        if (resultCode != getActivity().RESULT_OK)
            Bitmap bitmap = null;
        String path = "";
        if (requestCode == PICK_FROM_FILE) {
            mImageCaptureUri = data.getData();
            path = getRealPathFromURI(mImageCaptureUri); // From Gallery

            if (path == null)
                path = mImageCaptureUri.getPath(); // From File Manager

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

        imgProfile.setImageBitmap(bitmap);

    }

Answer 2

在您的片段代码中，您需要从片段中调用活动。而不是：

getActivity().startActivityForResult(Intent.createChooser(intent, "Complete action using"), PICK_FROM_FILE);

您需要调用以下内容，因为您的代码位于嵌套类中。

YOUR_FRAGMENT.this.startActivityForResult(Intent.createChooser(intent, "Complete action using"), PICK_FROM_FILE);

没有getActivity。

无法访问片段中的onActivityResult（）方法

2 个答案: