Android创办AlertDialog对话框 ==之一

activity如下

package com.example;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class LifeActivity extends Activity {	private Button alert = null;	@Override	protected void onCreate(Bundle savedInstanceState) {				super.onCreate(savedInstanceState);		setContentView(R.layout.main);		alert = (Button)findViewById(R.id.alert);		final Builder builder = new AlertDialog.Builder(this);				OnClickListener cliclListener = new OnClickListener() {						@Override		public void onClick(View v) {				//测试弹出窗口			builder.setIcon(R.drawable.ic_launcher);			builder.setMessage("测试弹出窗口");			builder.setTitle("自定义普通对话框");			builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {				@Override				public void onClick(DialogInterface dialog, int which) {					Toast.makeText(LifeActivity.this, "点击了确定按钮", Toast.LENGTH_SHORT).show();				}			});			builder.setNegativeButton("取消", new DialogInterface.OnClickListener(){				@Override				public void onClick(DialogInterface dialog, int which) {				Toast.makeText(LifeActivity.this, "点击了取消按钮", Toast.LENGTH_SHORT).show();				}			});			builder.create();			builder.show();		}		};			alert.setOnClickListener(cliclListener);	}}

 <Button         android:id="@+id/alert"        android:layout_height="wrap_content"        android:layout_width="fill_parent"        android:text="AlertDialog"/>

	//设置对话框的图标					builder.setIcon(R.drawable.ic_launcher);					//设置对话框的标题					builder.setTitle("自定义普通对话框");					builder.setItems(new String[]{"red","yellow","blue","green"}, new DialogInterface.OnClickListener(){						//该方法which参数代表用户单击的那个列表项						@Override						public void onClick(DialogInterface dialog, int which) {							switch(which){							case 0:								Toast.makeText(LifeActivity.this, "red", Toast.LENGTH_SHORT).show();								break;							case 1:								Toast.makeText(LifeActivity.this, "yellow", Toast.LENGTH_SHORT).show();							break;							case 2:								Toast.makeText(LifeActivity.this, "blue", Toast.LENGTH_SHORT).show();								break;							case 3:								Toast.makeText(LifeActivity.this, "green", Toast.LENGTH_SHORT).show();								break;							}						}											});					builder.create().show();