support包下的AlertDialog

只需导包的时候注意就行；

import android.content.DialogInterface;

import android.support.v7.app.AlertDialog;

代码：

 AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);            builder.setIcon(R.mipmap.ic_launcher);            builder.setTitle("温馨提示");            builder.setMessage("你确定退出应用吗?");            builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    finish();                    android.os.Process.killProcess(android.os.Process.myPid());                }            });            builder.setNegativeButton("取消", null);            AlertDialog dialog = builder.create();            dialog.show();

效果图：