Android弹出对话框

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;

String money="37737.92";

private void showDialog(){

    AlertDialog.Builder builder=new AlertDialog.Builder(this);
    builder.setTitle("您好！");
    builder.setMessage("您的可用预存款为："+money+"元");
    builder.setPositiveButton("确定",
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {

                }
            });
    AlertDialog dialog=builder.create();
    dialog.show();
}

效果如下：