android - AutoStart 应用程序无法正常工作

Question

我有一个带有 TimerTask 实现的简单 AutoStart 应用程序，几乎在许多设备上都能正常工作。问题是它在 Samsung Galaxy Y(2.3.6) 和 DELL XCD35(2.2) 中不工作。当设备启动时，TimerTask 工作几秒钟然后关闭。我检查了 Application->Manage Application，我看到 Applcation 已经处于 Force Stop 状态。这意味着我的应用程序在几秒钟后如何停止。那么，这两种设备中出现这种奇怪行为的原因是什么，如果有人有解决方案，请分享。

下面是我的代码。

MyReceiver.java

public class MyReceiver extends BroadcastReceiver{

    private Timer mTimer = new Timer();
    @Override
    public void onReceive(Context context, Intent arg1) {
        Toast.makeText(context, "Device Booted", Toast.LENGTH_LONG).show();
        Log.d("TAG","Device Booted");
        mTimer.scheduleAtFixedRate(new MyTimerTask(), 2000,2000);
    }

    private class MyTimerTask extends TimerTask
    {
        @Override
        public void run() {
            Log.d("TAG","TimerTask executed....");
        }
    }
}

AndroidManifest.xml

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

    <uses-sdk android:minSdkVersion="8" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <receiver android:name=".MyReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>
    </application>
</manifest>

Answer 1

我会建议您使用 AlarmManager 而不是 TimerTask，因为我在许多设备中遇到了您描述的相同问题。

    public void onReceive(Context context, Intent arg1) {
    Toast.makeText(context, "Device Booted", Toast.LENGTH_LONG).show();
    Log.d("TAG","Device Booted");
AlarmManager AM =(AlarmManager)getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent();
    intent.setAction("ALARM_MANAGER_ACTION");//can add any string action here
    PendingIntent pi = PendingIntent.getBroadcast(mContext
                                        .getApplicationContext(), 0, intent,0);
AM.set(AlarmManager.RTC,selectedTime, pi);
AM.setRepeating(AM.RTC_WAKEUP, System.currentTimeMillis()+2000, 2000, pi);
    }


  public class MyReceiver1 extends BroadcastReceiver{ 
  //event will come here
  private Timer mTimer = new Timer();
  @Override
  public void onReceive(Context context, Intent arg1) {
 // check if event is same as you broadcasted through alarmManager
    Toast.makeText(context, "Device Booted", Toast.LENGTH_LONG).show();
     Log.d("TAG","TimerTask executed....");

}

在您的应用中添加一个广播接收器，它应该监听 ("ALARM_MANAGER_ACTION") 操作。并将此操作添加到 list 文件中。我打赌它也适用于这两种设备。