當我啓動一個IntentService時，Android應用程序崩潰

當我啓動一個IntentService時，我的應用程序崩潰。我試圖讓intentservice讀取加速度計數據。即使屏幕關閉，我也打算使用部分喚醒鎖來保持它。因此，intentService從sensorEventListener擴展到我在清單中添加了COURSE_LOCATION和FINE_LOCATION權限。這裏是我的堆棧跟蹤當我啓動一個IntentService時，Android應用程序崩潰

java.lang.RuntimeException: Unable to start service [email protected] with Intent { cmp=com.shreeasish.safer/.SensorIntentService }: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Message android.app.IntentService$ServiceHandler.obtainMessage()' on a null object reference 
      at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2941) 
      at android.app.ActivityThread.access$2100(ActivityThread.java:155) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1415) 
      at android.os.Handler.dispatchMessage(Handler.java:102) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5343) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700) 
    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Message android.app.IntentService$ServiceHandler.obtainMessage()' on a null object reference 
      at android.app.IntentService.onStart(IntentService.java:116) 
      at android.app.IntentService.onStartCommand(IntentService.java:130) 
      at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2924) 
            at android.app.ActivityThread.access$2100(ActivityThread.java:155) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1415) 
            at android.os.Handler.dispatchMessage(Handler.java:102) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5343) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)

這是我的ServiceIntent類

public class SensorIntentService extends IntentService { 

    private Sensor mAccelerometer; 
    private SensorManager mSensorManager; 
// public static final String BROADCAST_ACTION = "com.shreeasish.Safer.SERVICE_BROADCAST"; 
// public static final String ACCELEROMETER_DATA = "com.shreeasish.Safer.ACCELEROMETER_DATA"; 

    @Override 
    public void onCreate() { 

    } 



    public SensorIntentService(String name) { 
     super(name); 
    } 

    public SensorIntentService() { 
     super("com.shreeasish.Safer"); 
    } 

    @Override 
    protected void onHandleIntent(Intent intent) { 

    } 

// @Override 
    public void onSensorChanged(SensorEvent event) { 

    } 

// @Override 
    public void onAccuracyChanged(Sensor sensor, int accuracy) { 

    } 


}

我還沒有添加任何代碼呢。所以它不應該崩潰嗎？

這是我使用啓動它

Intent mServiceIntent = new Intent(getActivity(), SensorIntentService.class); 
       getActivity().startService(mServiceIntent);

來源

2015-11-01 user3927312

您需要調用父類的onCreate（）在你的SensorIntentService代碼：

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

來源

2016-01-15 11:10:59

當我啓動一個IntentService時，Android應用程序崩潰

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