android中PopupWindow的使用详解

package com.gem.hsx.dialogtest;import android.app.Activity;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.widget.ImageButton;import android.widget.PopupWindow;import android.widget.Toast;public class Main extends Activity {private ImageButton imgbtndialog;private ImageButton imgbtnsearch;private ImageButton imgbtnorder;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);imgbtndialog=(ImageButton) findViewById(R.id.imgbtndialog);imgbtndialog.setOnClickListener(new ImgbtndialogOnClickListener());}private class ImgbtndialogOnClickListener implements OnClickListener{@Overridepublic void onClick(View v) {   initPopWindow(); }}  /**   * 弹出一个popwindow   */private void initPopWindow() {  // 加载popupWindow的布局文件   View contentView = LayoutInflater.from(getApplicationContext())  .inflate(R.layout.mydialog, null);   // 声明一个弹出框   并指定其大小final PopupWindow popupWindow = new PopupWindow(  contentView, 222, 84);  // 为弹出框设定自定义的布局   popupWindow.setContentView(contentView);  popupWindow.setFocusable(true);         /**        * 显示在imgbtndialog按钮下        */popupWindow.showAsDropDown(imgbtndialog);  imgbtnsearch = (ImageButton) contentView.findViewById(R.id.imgbtnsearch);  imgbtnsearch.setOnClickListener(new OnClickListener() {  @Override  public void onClick(View v) {  popupWindow.dismiss();  Toast.makeText(Main.this, "你点击的是搜索", 0).show();}  }); imgbtnorder = (ImageButton) contentView.findViewById(R.id.imgbtnorder);  imgbtnorder.setOnClickListener(new OnClickListener() {  @Override  public void onClick(View v) {  popupWindow.dismiss();  Toast.makeText(Main.this, "你点击的是排序", 0).show();}  }); }}
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