Question

在我的应用程序中，我正在使用后台服务，这是它的基本代码

 <application
        android:allowBackup="true"
        android:vmSafeMode="true"
        android:allowClearUserData="true"
        android:hardwareAccelerated="true"
        android:largeHeap="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:name=".MyApplication"
        android:theme="@style/AppTheme" >


Service contains some timers


public class ConnectionService extends Service
{
    private final IBinder mBinder = new ConnectionServiceBinder();
    private MyApplication app;

    private CountDownTimer mAliveTimer;
    public CountDownTimer  mPanicTimer;
    public CountDownTimer  mPerodicTimer;

    /* Not using binder anywhere right now */
    public class ConnectionServiceBinder extends Binder
    {
        public ConnectionService getService()
        {
            return ConnectionService.this;
        }
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
        //connect();
        return START_STICKY;
    }

    public void createPerodicTimer()
    {
        if (mPerodicTimer != null)
            mPerodicTimer.cancel();

        float fastestInterval = Preferences.getFloatSharedPrefValue(app, Constants.USERDEFAULT_SETTINGS_TIME, 5f) * 60 * 1000;
        mPerodicTimer = new CountDownTimer((int)fastestInterval, 1000)
        {
            @Override
            public void onTick(long millisUntilFinished)
            {}

            @Override
            public void onFinish()
            {
                Location myLocation = app.myLocationProvider.getMyLocation();
                Location currentBestLocation = null;
                String locValue = Preferences.getSharedPrefValue(app, Constants.USERDEFAULT_LOCATION);
                if (locValue != null)
                {
                    currentBestLocation = new Gson().fromJson(locValue, Location.class);
                }

                if (currentBestLocation == null)
                {
                    sendPerodicReporting();
                    Preferences.saveSharedPrefValue(app, Constants.USERDEFAULT_LOCATION , new Gson().toJson(myLocation));
                }
                else
                {
                    float displacement = Preferences.getFloatSharedPrefValue(app, Constants.USERDEFAULT_SETTINGS_DISTANCE, 50);
                    float dist = myLocation.distanceTo(currentBestLocation);
                    if (dist >= displacement)
                    {
                        sendPerodicReporting();
                    }
                    else
                    {
                        ApiManager.getInstance().mDbHelper.addToLog("System Event", "Perodic Report not sent", "Distance travelled is less than set displacement settings" + dist + " < " + displacement, app);
                    }
                }

                Preferences.saveSharedPrefValue(app, Constants.USERDEFAULT_LOCATION , new Gson().toJson(myLocation));
                mPerodicTimer.start();
            }
        };

        mPerodicTimer.start();
    }

    @Override
    public void onCreate()
    {
        super.onCreate();
        app = (MyApplication) getApplication();
        app.mService = this;
        app.addLocationUpdates();
        createPerodicTimer();

        mAliveTimer = new CountDownTimer(30000 * 60, 1000) // Keep Alive Timer is 30 minutes
        {
            @Override
            public void onTick(long millisUntilFinished)
            {}

            @Override
            public void onFinish()
            {
                if (Preferences.getBoolSharedPrefValue(app.getApplicationContext(), Constants.USERDEFAULT_SETTINGS_ALIVE, false))
                    sendAliveResponse();

                if (Preferences.getBoolSharedPrefValue(app.getApplicationContext(), Constants.USERDEFAULT_IS_PANIC_ENABLED, false))
                    sendPanicReporting();

                mAliveTimer.start();
            }
        };

        mPanicTimer = new CountDownTimer(30000, 1000) // Keep Alive Timer is 30 seconds
        {
            @Override
            public void onTick(long millisUntilFinished)
            {}

            @Override
            public void onFinish()
            {
                if (Preferences.getBoolSharedPrefValue(app.getApplicationContext(), Constants.USERDEFAULT_IS_PANIC_ENABLED, false))
                {
                    sendPanicReporting();
                    mPanicTimer.start();
                }
            }
        };

        mAliveTimer.start();
    }

    @Override
    public void onDestroy()
    {
        super.onDestroy();
    }

    @Override
    public IBinder onBind(Intent arg0)
    {
        return mBinder;
    }
}

有时在申请之后，让我们说在一分钟之后我会崩溃

致命信号11（SIGSEGV）代码= 2 我一直试图寻找解决方案，但找不到任何可行的工作。

如果我从我的应用程序中删除服务，应用程序工作正常。

如何解决此错误？

Answer 1

我不确定（在没有完整堆栈跟踪的情况下弄清楚发生了什么有点困难），但尝试禁用服务中的共享首选项保存并检查应用程序是否失败。我认为这个问题可能是由Gson序列化产生的字符串引起的。

我检查了行

返回的JsonElement的实现

new Gson().toJson(...)

似乎它没有实现 java.io.Serializable 接口。这可能会在对象保存期间导致问题。

使用服务时致命信号11（SIGSEGV）代码= 2

1 个答案: