Android 从 fragment 传递到 dialogfragment 时得到值 null

Question

我有一个问题，我使用 bundle 将数据从片段发送到 dialogfragment，但是当我单击片段布局中的按钮时出现问题，它成功地从片段获取数据，但在我的 dialogfragment 中它得到了空值，当我调试时，我发现我的对话框片段运行两次，所以我得到了空值。任何解决这个问题的建议，对不起我的英语，希望能理解我的问题。

这是我将数据传递到我的对话框片段的 onclick

 Button[i].setBackgroundColor(0xFF00FF00);
 Button[i].setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View view) {
                               TextView test = (TextView)getView().findViewById(R.id.testproductname);
                                test.setText(pName);
                                String testproductname = test.getText().toString();

                                Bundle args = new Bundle();
                                args.putString("key", testproductname);
                                FragmentDialog newFragment = new FragmentDialog();
                                newFragment.setArguments(args);
                                newFragment.show(getActivity().getSupportFragmentManager(), "TAG");

                                showTheDialog();
                     }
             });
 }
protected void showTheDialog() {
    FragmentManager fm = getActivity().getSupportFragmentManager();
    FragmentDialog overlay = new FragmentDialog();
    overlay.show(fm, "FragmentDialog");

 }

片段对话框

   public class FragmentDialog extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Dialog dialog = super.onCreateDialog(savedInstanceState);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        //dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.YELLOW));
        dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);

        return dialog;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle
            savedInstanceState) {
        View view = inflater.inflate(R.layout.prompt_quantity, container);

        // tab slider
        sectionsPagerAdapter = new SectionsPagerAdapter(getChildFragmentManager());

        // Set up the ViewPager with the sections adapter.
        viewPager = (ViewPager) view.findViewById(R.id.modifierpager);
        viewPager.setAdapter(sectionsPagerAdapter);

        Bundle mArgs = getArguments();
        pName = mArgs.getString("key","asdasd");

        final TextView tpn = (TextView)getView().findViewById(R.id.gtestproductname);
        tpn.setText(pName);
}

Answer 1

  newFragment.show(getActivity().getSupportFragmentManager(), "TAG");

                            showTheDialog();

你不需要调用两次显示，这个逻辑绘制了两次视图。这就是为什么你有异常。删除第二个。

Android 从 fragment 传递到 dialogfragment 时得到值 null

Android get the value null when passing from fragment to dialogfragment

android

android-fragments

android-dialogfragment