如何解决当我的 Moto G6 屏幕关闭时，我的后台服务停止
我创建了一个可以在我的 Moto G6 安卓设备上运行的应用。基本上，这个应用程序启动本地服务以定期访问网站。一切看起来都不错，但是当屏幕关闭时，服务会暂停。当屏幕打开时，它会再次激活。我在论坛和建议的内容中发现了很多关于这种行为的讨论，以下是我尝试过的：
- 我尝试将省电模式设置为关闭。结果相同。
- 我尝试使用 workmanager 而不是服务。我的工作人员也像我的服务一样暂停。
- 我尝试在我的服务中使用电源管理器来获取 PARTIAL_WAKE_LOCK，但它仍然没有改变任何东西。
Moto G6 有什么特别之处吗？...这是我的清单文件：
?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.coininverst">
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<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/Theme.CoinInverst">
<service android:name=".CoinGeckoService" />
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.CoinInverst.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这是我启动服务的方式（在主要活动中）：
mServiceIntent = new Intent(this,CoinGeckoService.class);
startService(mServiceIntent);
bindService(mServiceIntent,Connection,Context.BIND_AUTO_CREATE);
仍在主要活动中，嵌套类：
private ServiceConnection Connection = new ServiceConnection()
{
@Override
public void onServiceConnected(ComponentName className,IBinder service)
{
// We've bound to LocalService,cast the IBinder and get LocalService instance
CoinGeckoService.LocalBinder oBinder = (CoinGeckoService.LocalBinder) service;
mService = oBinder.getService();
mBound = true;
}
@Override
public void onServicedisconnected(ComponentName arg0)
{
mBound = false;
}
};
服务端：
public class CoinGeckoService extends Service
{
private Looper m_oServiceLooper = null;
private ServiceHandler m_oServiceHandler = null;
private HandlerThread m_oHandlerThread = null;
private boolean m_bExitFlag = false;
private boolean m_bExitEcho = false;
private int m_iSnapshotPeriodSec = 300;
private final IBinder m_oBinder = new LocalBinder();
private Intent m_oIntent = null;
private Thread m_oStillRunningProc = null;
private Message m_oHandleMessage = null;
private PowerManager m_oPowerManager = null;
private PowerManager.WakeLock m_oWakeLock = null;
private Context m_oContext = null;
// Handler that receives messages from the thread
private final class ServiceHandler extends Handler
{
public ServiceHandler(Looper oLooper)
{
super(oLooper);
}
@Override
public void handleMessage(Message msg)
{
m_oHandleMessage = msg;
m_oStillRunningProc = new Thread()
{
public void run()
{
InfiniteProcees();
}
};
m_oStillRunningProc.start();
}
}
private void InfiniteProcees()
{
while (!m_bExitFlag)
{
long lStartTimeMs = System.currentTimeMillis();
long lelapsedtimeMs = 0L;
long lWakeLockTimeoutMSec = 10 * 60 * 1000L;
m_oWakeLock.acquire(lWakeLockTimeoutMSec);
....
m_oWakeLock.release();
lelapsedtimeMs = (System.currentTimeMillis() - lStartTimeMs);
if ((m_iSnapshotPeriodSec * 1000) > (int)lelapsedtimeMs)
SleepMSec((m_iSnapshotPeriodSec * 1000) - (int)lelapsedtimeMs);
//do
//{
// SleepMSec(1000);
// lelapsedtimeMs = (System.currentTimeMillis() - lStartTimeMs);
//}
//while (!m_bExitFlag && (lelapsedtimeMs < (m_iSnapshotPeriodSec * 1000)));
}
// Stop the service using the startId,so that we don't stop
// the service in the middle of handling another job
stopSelf(m_oHandleMessage.arg1);
m_bExitEcho = m_bExitFlag;
}
public void onCreate()
{
int iNbPage = 3;
// Start up the thread running the service. Note that we create a
// separate thread because the service normally runs in the process's
// main thread,which we don't want to block. We also make it
// background priority so cpu-intensive work doesn't disrupt our UI.
m_oLogPath = getExternalFilesDir(null) + "/CoinDBase" ;
m_oImgPath = getExternalFilesDir(null) + "/CoinImages";
m_aoPages = new String[iNbPage];
m_oSyncExport = new Object();
m_oContext = this;
m_oPowerManager = (PowerManager)m_oContext.getSystemService(Context.POWER_SERVICE);
m_oWakeLock = m_oPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"CoinGeckoService:WakeLock");
....
m_oHandlerThread = new HandlerThread("ServiceStartArguments",Process.THREAD_PRIORITY_BACKGROUND);
m_oHandlerThread.start();
// Get the HandlerThread's Looper and use it for our Handler
m_oServiceLooper = m_oHandlerThread.getLooper();
m_oServiceHandler = new ServiceHandler(m_oServiceLooper);
}
@Override
public int onStartCommand(Intent intent,int flags,int startId)
{
Toast.makeText(this,"CoinGeckoService starting",Toast.LENGTH_SHORT).show();
m_oIntent = intent;
// For each start request,send a message to start a job and deliver the
// start ID so we kNow which request we're stopping when we finish the job
Message msg = m_oServiceHandler.obtainMessage();
msg.arg1 = startId;
m_oServiceHandler.sendMessage(msg);
// If we get killed,after returning from here,restart
return START_STICKY;
}
@Override
public IBinder onBind(Intent intent)
{
return m_oBinder;
}
@Override
public void onDestroy()
{
super.onDestroy();
m_bExitFlag = true;
int iTimeoutMsec = 2000;
while (!m_bExitEcho && (iTimeoutMsec > 0) && SleepMSec(100))
{
iTimeoutMsec -= 100;
}
//Toast.makeText(this,"CoinGeckoService done",Toast.LENGTH_SHORT).show();
Intent obroadcastIntent = new Intent();
obroadcastIntent.setAction("RestartService");
obroadcastIntent.setClass(this,ServiceRestarter.class);
this.sendbroadcast(obroadcastIntent);
}
public class LocalBinder extends Binder
{
CoinGeckoService getService()
{ // Return this instance of LocalService so clients can call public methods
return CoinGeckoService.this;
}
}
}
请注意，当应用程序关闭时，服务始终会停止。即使这不是预期的，但我现在可以接受。 每一个建议或评论将不胜感激。 提前致谢。
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