android-显示来自片段的弹出窗口

当单击按钮时,我想显示来自我的PlaceHodler类的扩展Fragment的弹出窗口.为了进行测试,我编写了此代码,该代码确实有效,但我认为这很荒谬(使用Button对象作为父视图,依此类推……我找不到其他使它起作用的方法…).请查看此代码,并为我提供改进建议.请不要判断我,因为我是编程的初学者.

我的代码：

public static class PlaceholderFragment extends Fragment {

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container, false);
        final Button button1 = (Button)rootView.findViewById(R.id.button1);
        button1.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.i("ilog", "onClick() works");
                PopupWindow pw = new PopupWindow(getActivity());
                TextView tv = new TextView(getActivity());
                LayoutParams linearparams1 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
                tv.setLayoutParams(linearparams1);
                tv.setText("Testing");
                pw.setContentView(tv);
                pw.setWidth(400);
                pw.setHeight(180);
                pw.showAtLocation(button1, Gravity.CENTER_HORIZONTAL, 25, 25);
                pw.update();
            }
        });
        return rootView;
    }
}

解决方法:

popw​​indow在片段和活动中几乎相同,除了它们使您获得contrext的方式外,在活动this中,片段getActivity()

这是创建popWindow的代码

    View popupView = LayoutInflater.from(getActivity()).inflate(R.layout.popup_layout, null);
    final PopupWindow popupWindow = new PopupWindow(popupView, WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);

// define your view here that found in popup_layout 
// for example let consider you have a button 

Button btn = (Button) popupView.findViewById(R.id.button);

// finally show up your popwindow
popupWindow.showAsDropDown(popupView, 0, 0);

参考PopupWindow

标签：android-fragments,placeholder,android-view,android-popupwindow,android
来源： https://codeday.me/bug/20191121/2055417.html