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);
}
}
如果在Facebook登录时遇到上述问题，那么你可以在你的片段的父活动中使用下面的代码:
Fragment fragment = getFragmentManager().findFragmentById(android.R.id.tabcontent);
fragment.onActivityResult(requestCode, resultCode, data);
Or:
Fragment fragment = getFragmentManager().findFragmentById("fragment id here");
fragment.onActivityResult(requestCode, resultCode, data);
并在你的片段中添加下面的调用…
callbackManager.onActivityResult(requestCode, resultCode, data);
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
对于那些使用Android导航组件的人，应该在Activity的onActivityResult(…)中使用primaryNavigationFragment来获取它的片段引用，并调用fragment的fragment.onActivityResult(…)
下面是Activity的onActivityResult(…)
@Override
public void onActivityResult(int requestCode, int resultCode, Intent imageData)
{
super.onActivityResult(requestCode, resultCode, imageData);
for (Fragment fragment : getSupportFragmentManager().getPrimaryNavigationFragment().getChildFragmentManager().getFragments())
{
fragment.onActivityResult(requestCode, resultCode, imageData);
}
}
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);
}
}
我也面临着同样的问题，一旦我把这段代码从一个片段转移到一个实用工具类，将parentActivity作为参数传递，
Intent intent = new Intent(parentActivity, CameraCaptureActivity.class);
parentActivity.startActivityForResult(intent,requestCode);
然后我没有得到任何值在onActivityResult方法的片段，
之后，我把参数改为Fragment，所以修改后的method定义是这样的，
Intent intent = new Intent(fragment.getContext(), CameraCaptureActivity.class);
fragment.startActivityForResult(intent,requestCode);
在那之后，我能够在片段上的onActivityResult中获得值
