单元测试之寻找bug

首先，打开老师给的代码

JAVA程序：

package com.example.tasks;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.widget.Toast;

import com.avos.avoscloud.AVException;
import com.avos.avoscloud.AVObject;
import com.avos.avoscloud.AVQuery;
import com.avos.avoscloud.AVUser;
import com.avos.avoscloud.FindCallback;

import java.util.List;

/**
 * Created by ywq on 2016/6/2.
 */
public class AlarmActivity extends Activity {

    MediaPlayer alarmMusic;
    String note;
    String id;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tixing);

         id = getIntent().getExtras().getString("id");

//        Toast.makeText(this,id,Toast.LENGTH_LONG).show();

        final AVQuery<AVObject> query = new AVQuery<>("NoteList");
        query.whereEqualTo("objectId", id);
        query.findInBackground(new FindCallback<AVObject>() {
            @Override
            public void done(List<AVObject> list, AVException e) {

                for (AVObject avobect : list) {
                    note = avobect.getString("note");
                }

//                note = list.get(0).getString("note");

                // 加载指定音乐，并为之创建MediaPlayer对象
                alarmMusic = MediaPlayer.create(AlarmActivity.this, R.raw.ls3);
                alarmMusic.setLooping(true);
                // 播放音乐
                alarmMusic.start();
                // 创建一个对话框

                new AlertDialog.Builder(AlarmActivity.this)
                        .setTitle("提醒")
                        .setMessage(note)

                        .setPositiveButton(
                                "确定",
                                new DialogInterface.OnClickListener() {
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
                                        // 停止音乐
                                        alarmMusic.stop();
                                        // 结束该Activity
                                        finish();
                                    }
                                }
                        )
                        .show();

            }
        });

    }

}

activity 程序：

   <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical">

        <EditText
            android:id="@+id/LoginName"
            android:layout_width="match_parent"
            android:layout_height="40dp"

            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:background="@android:color/transparent"
            android:hint="请输入用户名"
            android:inputType="text"
             />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:background="#000000" />

        <EditText
            android:id="@+id/LoginPwd"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"

            android:background="@android:color/transparent"
            android:hint="请输入密码"
            android:inputType="textPassword"
             />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:background="#000000"/>

        <Button
            android:id="@+id/Login"
            android:layout_width="100dp"
            android:layout_height="40dp"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="20dp"
            android:background="#FFC125"
            android:text="登录"
            android:textColor="#ffffff"
            android:textSize="20sp" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:gravity="center_horizontal"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/textView2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:text="没有账号？" />

            <TextView
                android:id="@+id/Regist1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:text="马上注册"
                android:textColor="@android:color/holo_blue_bright" />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

结果：