popupWindow _display

最新推荐文章于 2022-01-20 17:51:12 发布

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最新推荐文章于 2022-01-20 17:51:12 发布

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分类专栏： Android 文章标签： button layout string class null

本文链接：https://blog.youkuaiyun.com/to_cm/article/details/6077103

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本文介绍了一个使用Android的PopupWindow组件创建弹出窗口的示例。该示例展示了如何定义按钮触发弹出窗口显示和取消的方法，并设置了弹出窗口的位置及样式。

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package com.et;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.PopupWindow;

public class TestPopupWindow extends Activity{

private static final String TAG = TestPopupWindow.class.getSimpleName();
private LinearLayout flayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  flayout = new LinearLayout(this);
  LinearLayout.LayoutParams lParams = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);
  flayout.setLayoutParams(lParams);

  LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
  lp.setMargins(10, 10, 10, 10);
  Button btn = new Button(this);
  btn.setText("popupWindow");
  btn.setLayoutParams(lp);
  flayout.addView(btn);
  this.addContentView(flayout, lParams);

  btn.setOnClickListener(new OnClickListener(){
   @Override
   public void onClick(View v) {
    showPopWindow();
   }});

  Button btC = new Button(this);
  btC.setText("cancel");
  btC.setLayoutParams(lp);
  btC.setOnClickListener(new OnClickListener(){

   @Override
   public void onClick(View v) {

    if(pwindow != null){
     pwindow.dismiss();
    }
   }});

  flayout.addView(btC);
}
PopupWindow pwindow =null;

private void showPopWindow(){
  Log.d(TAG, "///showpopwindow/////");
  LayoutInflater infalter = this.getLayoutInflater();
  View v = infalter.inflate(R.layout.popmessage,(ViewGroup)this.findViewById(R.id.toast_layout_root));
  pwindow = new PopupWindow(v,200,200);
  pwindow.setFocusable(true);
  pwindow.setBackgroundDrawable(getResources().getDrawable(R.drawable.icon));
  pwindow.showAtLocation(flayout , Gravity.CENTER, 0, 0);
}

}