每隔2分钟调度一次警报

Question

在我的活动课上

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        AlarmManager alarmManager=(AlarmManager) getSystemService(ALARM_SERVICE);
        Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
        alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,System.currentTimeMillis(),2000, pendingIntent);

    }

我的onrecieve功能在alarmreciever类

     @Override
     public void onReceive(Context context, Intent intent)
      {   
        //get and send location information
         System.out.println("fired");
      }

我正在使用nexus 4,kitkat版本.我没有看到每2分钟发射任何一个接收函数.正在发生...任何帮助？谢谢

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.alarmexample"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="20" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <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="com.example.AlarmExample"
        android:exported="false" >
    </receiver>
</application>
 </manifest>

我也把我的清单也放了.................................................

Answer 1

在setRepeating函数中,您应该对ELAPSED_REALTIME_WAKEUP使用SystemClock.elapsedRealTime().此外,您需要将2000更改为2*60*1000以指定间隔时间.

alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                          SystemClock.elapsedRealtime(),
                          2*60*1000, 
                          pendingIntent);

希望这可以帮助.

参考:ELAPSED_REALTIME_WAKEUP

编辑:在您的清单文件中,您的收件人姓名中有一个拼写错误.将".AlarmReciever"更改为".AlarmReceiver".

<receiver
    android:name=".AlarmReceiver"
    android:exported="true" >
</receiver>