AlertDialog可以直接显示定义在XML中定义的数组，效果类似于在ListView上长按跳出的ContextMenu。 效果图： 
实现代码：
package com.pocketdigi.alertdialog;
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;
import android.widget.Toast;
public class main extends Activity {
/** Called when the activity is first created. */
Button b1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
b1=(Button)findViewById(R.id.b1);
b1.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
AlertDialog.Builder ad=new AlertDialog.Builder(main.this);
final String[] itemArray=getResources().getStringArray(R.array.item);
//获取XML文件中数组
ad.setTitle("标题");
ad.setItems(R.array.item, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(main.this,itemArray[which],Toast.LENGTH_LONG).show();
//输出选中的项
}
});
ad.show();
}});
}
}