Dialog dialog= new AlertDialog.Builder(MainActivity.this)
.setTitle("提示")
.setMessage("你确定退出吗?")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
System.exit(0);
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
})
.create();
dialog.show();