AlarmManager：值超过某个限制后，警报未被触发

Question

我想设置一个警报，在从Ubidots实时收到的值超过某个限制（此时，限制设置为10000）后将触发警报。 MainActivity.java中的部分代码是那些实现其他功能的代码（从Ubidots获取传感器值并在我的移动应用程序中将其绘制在图表中，此功能确实有效）

然而，警报未被触发。以下是我到目前为止所做的事情：

MainActivity.java

public class MainActivity extends AppCompatActivity {

 private TextView mTextMessage;
 private static GraphicalView view;
 private LineGraph line = new LineGraph();
 private static Thread thread;

 private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
        = new BottomNavigationView.OnNavigationItemSelectedListener() {

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case R.id.navigation_home:
                mTextMessage.setText(R.string.title_home);
                return true;
            case R.id.navigation_dashboard:
                mTextMessage.setText(R.string.title_dashboard);
                return true;
            case R.id.navigation_notifications:
                mTextMessage.setText(R.string.title_notifications);
                return true;
        }
        return false;
    }
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mTextMessage = (TextView) findViewById(R.id.message);
    BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
    navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);

    thread = new Thread() {
        public void run()
        {
            for (int i = 0; i <1000; i++)
            {
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                Point p = UbidotsData.getDataFromReceiver(i); // We got new data!
                line.addNewPoints(p); // Add it to our graph
                view.repaint();
            }
        }
    };
    thread.start();
}

@Override
protected void onStart() {
    super.onStart();
    view = line.getView(this);
    setContentView(view);
}

AlarmReceiver.java

public void scheduleAlarm(View V)
{

    // Create an Intent and set the class which will execute when Alarm triggers
    // Adding AlarmReceiver in the Intent, the onRecieve() method of this class will execute when
    // alarm triggers
    Intent intentFireAlarm = new Intent(this, AlarmReceiver.class);

    // create the object
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    int alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP;

    //set the alarm for particular time
    PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intentFireAlarm, 0);

    //Ubidots Client
    ApiClient api1 = new ApiClient("XXXXXXXXXXXXXXXXXXXX");
    Variable ldr1 = api1.getVariable("XXXXXXXXXXXXXXXXXXXX");
    Value[] values = ldr1.getValues();
    int newData = (int) values[0].getValue();

    if(newData>30000) {
        alarmManager.set(alarmType, SystemClock.elapsedRealtime(), alarmIntent);
        }

    }
}


public class AlarmReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent)
{
    Log.i(TAG,"Alarm Notification received");

    }
}

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.teerna.smartagriculturev5">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
<receiver android:name=".AlarmReceiver"></receiver>
</application>

</manifest>

下面的这部分（取自Ubidots API）确实在移动应用程序的折线图中实时获取传感器值，因此我不确定这是否是一个问题：

ApiClient api1 = new ApiClient("XXXXXXXXXXXXXXXXXXXX");
Variable ldr1 = api1.getVariable("XXXXXXXXXXXXXXXXXXXX");
Value[] values = ldr1.getValues();
int newData = (int) values[0].getValue();