java - 启动 BottomSheetFragment 获取结果

Question

我想从 BottomSheetFragment 获取结果。我尝试通过

内的 getActivity().setResult(Activity.RESULT_OK, null); 来完成此操作

    @Override
public void onDismiss(DialogInterface dialog) {
    getActivity().setResult(Activity.RESULT_OK, null);
    super.onDismiss(dialog);
}

但 Activity 的 onActivityResult 方法未调用。我做错了什么？

    @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    Toast.makeText(this, requestCode, Toast.LENGTH_SHORT).show();
    super.onActivityResult(requestCode, resultCode, data);
}

对话框启动方法

BottomSheetDialogFragment bottomSheetFragment = new BottomSheetDialogFragment();
            Bundle bundle = new Bundle();
            bottomSheetFragment.setArguments(bundle);
            bottomSheetFragment.show(getSupportFragmentManager(), bottomSheetFragment.getTag());

Answer 1

onActivityResult() 用于从另一个 Activity 获取结果。

更多信息:https://developer.android.com/training/basics/intents/result

如果你想从Fragment发送一些数据到Activity，你可以通过定义一个接口(interface)来实现，或者通过将其转换到特定的Activity来调用Activity中的方法来实现。

class MainActivity extends AppCompatActivity {

 @Override
 protected void onCreate(@Nullable Bundle savedInstanceState) {
  YourBottomSheetDialogFragment bottomSheetFragment = new YourBottomSheetDialogFragment();
  Bundle bundle = new Bundle();
  bottomSheetFragment.setArguments(bundle);
  bottomSheetFragment.show(getSupportFragmentManager(), bottomSheetFragment.getTag());
 }

 public void setResultFromFragment(String data) {
  ...
 }
}

/**
* Calling Activity's method from Fragment
*/
class YourBottomSheetDialogFragment extends BottomSheetDialogFragment {

 @Override
 public void onCreate(@Nullable Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  ((MainActivity) getActivity()).setResultFromFragment("");
 }
}