인 텐트 서비스로 인해 응용 프로그램이 손상 될 수 있습니다.

Question

Android 서비스를 사용했는데 작동 방식을 알고 있지만 그 서비스와 IntentService의 차이점을 알지 못합니다. 그래서 아래에 표시된대로 MyIntentService 클래스를 만들었지 만 실행시 시간에 앱이 다운되고 아래 게시 된 logCat 오류가 발생합니다.

내가 이러한 오류를 수신하고 그것을 해결하는 방법을 이유를 말해주십시오

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")); 
    } 
} 

로그 캣 :

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

인수없이이 도움이