弹出窗体。

 1 package com.lixu.tanchuchuangti;
 2
 3 import android.app.Activity;
 4 import android.graphics.Color;
 5 import android.os.Bundle;
 6 import android.view.Gravity;
 7 import android.view.LayoutInflater;
 8 import android.view.View;
 9 import android.view.View.OnClickListener;
10 import android.widget.Button;
11 import android.widget.PopupWindow;
12 import android.widget.TextView;
13
14 public class MainActivity extends Activity {
15
16     @Override
17     protected void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.activity_main);
20
21         final Activity activity = this;
22
23         final Button button = (Button) findViewById(R.id.button1);
24
25         button.setOnClickListener(new OnClickListener() {
26
27             @Override
28             public void onClick(View v) {
29                 LayoutInflater mLayoutInflater = activity.getLayoutInflater();
30                 View view = mLayoutInflater.inflate(android.R.layout.simple_list_item_1, null);
31                 TextView tv = (TextView) view.findViewById(android.R.id.text1);
32
33                 view.setBackgroundColor(Color.GRAY);
34                 tv.setTextColor(Color.BLUE);
35                 tv.setText("你好啊 ！！");
36
37                 PopupWindow pw = new PopupWindow(view, 100, 100);
38                 // 将弹出窗体设置在按钮之下
39                 // pw.showAsDropDown(button);
40
41                 // 设置背景图片
42                 pw.setBackgroundDrawable(activity.getResources().getDrawable(R.drawable.dfdf));
43                 // 这里要设置一个背景图片才能触发这个功能
44                 // 点击窗体外关闭弹出窗体
45                 pw.setOutsideTouchable(true);
46                 // 设置弹出框居中
47                 pw.showAtLocation(activity.getWindow().getDecorView(), Gravity.CENTER, 0, 0);
48
49             }
50         });
51     }
52
53 }

运行效果图：