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fragment类内部的onActivityResult方法有问题，并且你想要更新一些也在fragment类内部的东西，使用:
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode == Activity.RESULT_OK)
{
// If the user had agreed to enabling Bluetooth,
// populate the ListView with all the paired devices.
this.arrayDevice = new ArrayAdapter<String>(this.getContext(), R.layout.device_item);
for(BluetoothDevice bd : this.btService.btAdapater.getBondedDevices())
{
this.arrayDevice.add(bd.getAddress());
this.btDeviceList.setAdapter(this.arrayDevice);
}
}
super.onActivityResult(requestCode, resultCode, data);
}
只要加上这个。变量，如上面代码所示。否则，该方法将在父活动中被调用，并且该变量不会在当前实例中更新。
我还通过将这段代码放到MainActivity中进行测试，用HomeFragment类替换它，并将变量设置为静态。我得到了我所期望的结果。
因此，如果你想让片段类拥有自己的onActivityResult实现，上面的代码示例就是答案。
如果在fragment类内部的onActivityResult方法有问题，并且你想要更新一些也在fragment类内部的东西，使用:
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode == Activity.RESULT_OK)
{
// If the user had agreed to enabling Bluetooth,
// populate the ListView with all the paired devices.
this.arrayDevice = new ArrayAdapter<String>(this.getContext(), R.layout.device_item);
for(BluetoothDevice bd : this.btService.btAdapater.getBondedDevices())
{
this.arrayDevice.add(bd.getAddress());
this.btDeviceList.setAdapter(this.arrayDevice);
}
}
super.onActivityResult(requestCode, resultCode, data);
}
只要加上这个。变量，如上面代码所示。否则，该方法将在父活动中被调用，并且该变量不会在当前实例中更新。
我还通过将这段代码放到MainActivity中进行测试，用HomeFragment类替换它，并将变量设置为静态。我得到了我所期望的结果。
因此，如果你想让片段类拥有自己的onActivityResult实现，上面的代码示例就是答案。
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);
}
}
