Android保持intentservice运行并监听广播

Question

我试图跟踪在用户未启动应用程序的情况下触发“SCREEN_ON”的次数。该应用程序本身仅显示一个带有一些图表和信息的 Activity 。我创建了一个小测试，但我认为这不是正确的方法，因为它会耗尽我的电池。

我得到了一个广播接收器“BOOT_COMPLETED”，它启动了一个粘性 IntentService，它正在注册“SCREEN_ON”广播接收器，它有一个永无止境的循环来捕获广播(电池耗尽问题)。

是否可以在没有服务的情况下收听“SCREEN_ON”广播？

朱

list

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
    android:name=".Application"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme"
    android:hardwareAccelerated="true">

    <activity
        android:name=".activities.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>

    <service android:enabled="true" android:name=".services.ScreenOnService" />

    <receiver android:name=".broadcast.receivers.AutoStartReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
        </intent-filter>
    </receiver>
    <receiver android:name=".broadcast.receivers.ScreenOnReceiver">
        <intent-filter>
            <action android:name="android.intent.action.SCREEN_ON" />
        </intent-filter>
    </receiver>
</application>

自动启动接收器

public class AutoStartReceiver extends BroadcastReceiver
{
    public void onReceive(Context aContext, Intent anIntent)
    {
        Log.i("[AutoStartReceiver]", "onReceive");
        aContext.startService(new Intent(aContext, ScreenOnService.class));
    }
}

ScreenOnReceiver

public class ScreenOnReceiver extends BroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        Log.i("[ScreenOnReceiver]", "onReceive");
    }
}

屏幕开启服务

public class ScreenOnService extends IntentService
{
    private ScreenOnReceiver theReceiver;

    public ScreenOnService()
    {
        super(ScreenOnService.class.getName());
        theReceiver = new ScreenOnReceiver();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
        Log.v("[ScreenOnService]", "onStartCommand");
        super.onStartCommand(intent, flags, startId);
        return START_STICKY;
    }

    @Override
    protected void onHandleIntent(Intent intent)
    {
        Log.i("[ScreenOnService]", "onHandleIntent");
        registerReceiver(theReceiver, new IntentFilter(Intent.ACTION_SCREEN_ON));
        while(true);
    }

    @Override
    public void onDestroy()
    {
        Log.i("[ScreenOnService]", "onDestroy");
        unregisterReceiver(theReceiver);
        super.onDestroy();
    }
}

Answer 1

与常规启动的 Service 相比，您是否有任何特殊原因要使用 IntentService？

您应该能够使用常规启动的 Service 来实现此目的。将接收器注册为 onStartCommand 的一部分。

像这样:

public class MyService extends Service {
    private ScreenOnReceiver mReceiver;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if (mReceiver == null) {
            mReceiver = new ScreenOnReceiver();
            registerReceiver(mReceiver, new IntentFilter(Intent.ACTION_SCREEN_ON));
        }
        // We want this service to continue running until it is explicitly
        // stopped, so return sticky.
        return START_STICKY;
    }

    // remember to unregister receiver in onDestroy...
}

这样可以避免繁忙的循环。 IntentService 被设计为执行后台操作的短期服务。您的使用不符合 IntentService 的目的。