Question

我试图将数据从BotomSheetDialogFragment中侦听或传递到Fragment中以更改Fragment上的内容（就像选择器一样）。

我已尝试使用getTargetFragment来实例化侦听器，但收到编译器错误发现：＆＃39; MyFragment＆＃39;，required：＆＃39; android.support.v4.app.Fragment＆＃39;少..

任何想法或我采取了错误的做法？

public class MyBottomSheetDialogFragment extends BottomSheetDialogFragment implements View.OnClickListener {


ReportType reportType;

public interface OnChooseReasonListener {
    void onChooseReason(ReportType reportType);
}

OnChooseReasonListener listener;

@Override
public void setupDialog(Dialog dialog, int style) {
    super.setupDialog(dialog, style);
    View contentView = View.inflate(getContext(), R.layout.picker_bottom_sheet_, null);
    dialog.setContentView(contentView);
    CoordinatorLayout.LayoutParams layoutParams =
            (CoordinatorLayout.LayoutParams) ((View) contentView.getParent()).getLayoutParams();
    CoordinatorLayout.Behavior behavior = layoutParams.getBehavior();

    //get null here!!!:
    listener = (OnChooseReasonListener)  getParentFragment();// or with getTargetFragment();
  }

  @Override
public void onClick(View view) {
    switch (view.getId()){
        case R.id.cool_button:
            this.reportType = ReportType.ME;
            //trying to execute the lisstener on null
            listener.onChooseReason(this.reportType);
            dismiss();
            break;
    }
}}

片段：

    public class MyFragment extends Fragment 
  implements View.OnClickListener, 
  MyBottomSheetDialogFragment.OnChooseReasonListener {
//....code here
  public void showPicker() {
        //getting and compiler error Wrong 1st argument type. 
        // picker. setTargetFragment(MyFragment.this , 300);
         picker.show(fm, picker.getTag());
     }
   @Override
    public void onChooseReason(ReportType reportType) {
        //not getting here
        Log(TAG, "You choose something" + reportType.getValue());
    }
}

Answer 1

除了它不起作用之外，由于你将MyBottomSheetDialogFragment与创建它的对象耦合，因此该代码闻起来有点香味。

正确的方法是在void setOnChooseReasonListener(OnChooseReasonListener listener)上设置方法MyBottomSheetDialogFragment，并在创建实例时调用它。

myBottomSheetDialogFragment.setOnChooseReasonListener(this);

从BottomSheetDialogFragment传递或监听数据到Fragment

1 个答案: