Android中AlertDialog用法实例分析

import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class A01Activity extends Activity { Button b;  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    b=(Button)findViewById(R.id.button);    b.setOnClickListener(new OnClickListener(){  @Override  public void onClick(View v) {  // TODO Auto-generated method stub  new AlertDialog.Builder(A01Activity.this)  .setTitle(R.string.str_title)  .setIcon(R.drawable.fei)  .setMessage(R.string.str_message)  .setPositiveButton("OK",new DialogInterface.OnClickListener() {   @Override   public void onClick(DialogInterface dialog, int which) {   // TODO Auto-generated method stub   finish();  //结束该程序的Activity   }  })  //返回该程序的Activity  .setNegativeButton("NO", new DialogInterface.OnClickListener() {   @Override   public void onClick(DialogInterface dialog, int which) {   // TODO Auto-generated method stub   }  }).show();  }    });  }}