Intent-Service verursacht die App zum Absturz

Question

Ich habe Android Service und ich weiß, wie es funktioniert, aber ich weiß nicht den Unterschied zwischen IntentService und. Also habe ich die MyIntentService-Klasse wie unten gezeigt erstellt, aber zum Zeitpunkt stürzt die App ab und erzeugt die unten angegebenen logCat-Fehler.

Bitte sagen Sie mir, warum ich diese Fehler erhalte und wie es zu lösen

MainActivity

public class MainActivity extends AppCompatActivity { 

    private final String TAG = this.getClass().getSimpleName(); 

    private Button mbtnSend = null; 
    private int i = 0; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     this.mbtnSend = (Button) findViewById(R.id.btn_send); 

     this.mbtnSend.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intent = new Intent(getApplicationContext(), MyIntentService.class); 
       intent.putExtra("intent_key", ++i); 
       startService(intent); 
      } 
     }); 

    } 
} 

MyIntentService:

public class MyIntentService extends IntentService { 

    private final String TAG = this.getClass().getSimpleName(); 

    /** 
    * Creates an IntentService. Invoked by your subclass's constructor. 
    * 
    * @param name Used to name the worker thread, important only for debugging. 
    */ 
    public MyIntentService(String name) { 
     super(name); 
     setIntentRedelivery(true); 
    } 

    @Override 
    public void onCreate() { 
     super.onCreate(); 
     Log.w(TAG, SubTag.msg("onCreate")); 
    } 

    @Override 
    protected void onHandleIntent(Intent intent) { 
     Log.w(TAG, SubTag.msg("onHandleIntent")); 

     int intent_value = intent.getIntExtra("intent_key", -1); 
     Log.i(TAG, SubTag.bullet("", "intent_value: " + intent_value)); 

     SystemClock.sleep(3000); 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     Log.w(TAG, SubTag.msg("onStartCommand")); 

     return super.onStartCommand(intent, flags, startId); 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     Log.w(TAG, SubTag.msg("onDestroy")); 
    } 
} 

logcat:

07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime: FATAL EXCEPTION: main 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime: Process: com.example.com.intentservice_00, PID: 18094 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime: java.lang.RuntimeException: Unable to instantiate service com.example.com.intentservice_00.MyIntentService: java.lang.InstantiationException: java.lang.Class<com.example.com.intentservice_00.MyIntentService> has no zero argument constructor 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread.handleCreateService(ActivityThread.java:3778) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread.access$2100(ActivityThread.java:223) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1885) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:102) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.os.Looper.loop(Looper.java:158) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:7231) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Native Method) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime: Caused by: java.lang.InstantiationException: java.lang.Class<com.example.com.intentservice_00.MyIntentService> has no zero argument constructor 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at java.lang.Class.newInstance(Native Method) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread.handleCreateService(ActivityThread.java:3775) 
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread.access$2100(ActivityThread.java:223)  
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1885)  
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:102)  
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.os.Looper.loop(Looper.java:158)  
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:7231)  
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Native Method)  
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)  
07-18 11:39:04.081 18094-18094/com.example.com.intentservice_00 E/AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)  

Answer 1

Try this .. einen Konstruktor Standard erstellen

public class MyIntentService extends IntentService{ 

    public MyIntentService(){ 
     super(null);// That was the lacking constructor 
    } 
    public MyIntentService(String name) { 
     super(name); 
    } 
//... 
} 

Hope this ohne Argumente