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);
}
}
选项1:
如果你从片段调用startActivityForResult()，那么你应该调用startActivityForResult()，而不是getActivity().startActivityForResult()，因为它将导致片段onActivityResult()。
如果你不确定你在哪里调用startActivityForResult()和你将如何调用方法。
选项2:
由于Activity获得onActivityResult()的结果，您将需要覆盖活动的onActivityResult()并调用super.onActivityResult()来传播到未处理的结果代码或所有的各自片段。
如果以上两个选项都不管用，那么请参考选项3，因为它肯定会起作用。
选项3:
从fragment显式调用onActivityResult函数如下所示。
在父Activity类中，重写onActivityResult()方法，甚至在Fragment类中重写同样的方法，并像下面的代码一样调用。
在父类中:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.dualPane);
fragment.onActivityResult(requestCode, resultCode, data);
}
在儿童班:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// In fragment class callback
}
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);
}
}
大多数答案都说你必须在你的Fragment的宿主Activity中调用super.onActivityResult(…)。但这似乎对我不起作用。
所以，在你的主机活动中，你应该调用你的片段onActivityResult(…)。这里有一个例子。
public class HostActivity extends Activity {
private MyFragment myFragment;
protected void onActivityResult(...) {
super.onActivityResult(...);
this.myFragment.onActivityResult(...);
}
}
在HostActivity的某些时候，你需要分配这个。你正在使用的片段。或者，使用FragmentManager来获取Fragment，而不是在HostActivity中保留对它的引用。另外，在你尝试调用this.myFragment.onActivityResult(…);;
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);
}
}
添加这个
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT,MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 1);
}
当你将替换你的代码与上述代码，然后自动你的这个
public void onActivityResult(int requestCode, int resultCode,
@Nullable Intent data){}
方法将开始工作
//No Need to write this code in onclick method
Intent intent=new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT)
startActivityForResult(intent,1);
Toast.makeText(getContext(), "image"+intent, Toast.LENGTH_SHORT).show();
