Ich versuche, Intellected Call-Remote-Service mit 'BindService' von aidl in SDK 23 zu verwenden, aber es immer eine Null-Objekt-Referenz

Question

Ich baute zwei Projekt: eins ist Remote-Service Pro, das andere ist Test-Remote-Service Pro.Remote Service implementieren AIDL Schnittstelle wie folgt:

package com.example.alpha.receiverserrvice.Services; 

// Declare any non-default types here with import statements 

interface Pay { 
    /** 
    * Demonstrates some basic types that you can use as parameters 
    * and return values in AIDL. 
    */ 
    int pay(String username,String password,float money); 
} 

Der Remote-Service-Register in manifeast:

<service android:name=".Services.PayService" 
android:exported="true"> 
<intent-filter> 
    <action android:name="com.example.alpha.alipay"/> 
</intent-filter> 

Der Code-Remote-Dienst wie folgen:

public class PayService extends Service { 
private Mybinder mybinder; 
@Nullable 
@Override 
public IBinder onBind(Intent intent) { 
    mybinder=new Mybinder(); 
    return mybinder; 
} 

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

private class Mybinder extends Pay.Stub{ 

    @Override 
    public int pay(String username, String password, float money) throws RemoteException { 
     return safePay(username,password,money); 
    } 
} 

private int safePay(String username,String password,float money){ 
    if("gyq".equals(username)&&"123456".equals(password)){ 
     if(money>100){ 
      return 200; 
     } 
     else return 500; 
    } 
    else return 404; 
} 
} 

und testen Remote-Service-Code in dem anderen Projekt folgen:

public class MainActivity extends AppCompatActivity { 

private Myconn conn; 
private Pay payment; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Intent intent=new Intent("com.example.alpha.alipay"); 
    intent.setPackage("com.example.alpha.receiverserrvice.Services"); 
    conn=new Myconn(); 
    bindService(intent, conn, Context.BIND_AUTO_CREATE); 

    Button button= (Button) findViewById(R.id.pay); 
    button.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Payfor(view); 
     } 
    }); 
} 

public void Payfor(View view) { 
    try { 
     int resultcode= payment.pay("gyq123", "123456", 300.0f); 
     if (200==resultcode) { 
      Toast.makeText(this, "pay success.", Toast.LENGTH_SHORT).show(); 
     } 
     else if (resultcode==404) { 
      Toast.makeText(this, "username or password is incorrect", Toast.LENGTH_SHORT).show(); 
     } 
     else if (resultcode==500) { 
      Toast.makeText(this, "Lack of balance", Toast.LENGTH_SHORT).show(); 
     } 
    } catch (RemoteException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
} 

private class Myconn implements ServiceConnection{ 

    @Override 
    public void onServiceConnected(ComponentName name, IBinder service) { 
     payment=Pay.Stub.asInterface(service); 
     Log.d("zhifubao.client", "bind remote servoce success."); 
    } 

    @Override 
    public void onServiceDisconnected(ComponentName name) { 
     // TODO Auto-generated method stub 

    } 

} 
} 

Schließlich wird der Fehler in Android Studio folgen:

java.lang.NullPointerException: Attempt to invoke interface method 'int com.example.alpha.receiverserrvice.Services.Pay.pay(java.lang.String, java.lang.String, float)' on a null object reference 
     at com.example.alpha.testpayservice.MainActivity$override.Payfor(MainActivity.java:47) 
     at com.example.alpha.testpayservice.MainActivity$override.access$dispatch(MainActivity.java) 
     at com.example.alpha.testpayservice.MainActivity.Payfor(MainActivity.java:0)                     
     at com.example.alpha.testpayservice.MainActivity$1$override.onClick(MainActivity.java:40)                     
     at com.example.alpha.testpayservice.MainActivity$1$override.access$dispatch(MainActivity.java)                     
     at com.example.alpha.testpayservice.MainActivity$1.onClick(MainActivity.java:0)                     
     at android.view.View.performClick(View.java:5198)                     
     at android.view.View$PerformClick.run(View.java:21147)                     
     at android.os.Handler.handleCallback(Handler.java:739)                     
     at android.os.Handler.dispatchMessage(Handler.java:95)                     
     at android.os.Looper.loop(Looper.java:148)                     
     at android.app.ActivityThread.main(ActivityThread.java:5417)                     
     at java.lang.reflect.Method.invoke(Native Method)                     
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)                     
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

Also, wenn ich versuche, Remote-Service zu binden um Methode es immer zurück zu benennen mich Nullobjektreferenz, ich weiß nicht, wo Problem ist, Wenn Sie es finden können, bitte sell.Thank Sie.

Answer 1

Ihr Paket Name falsch ist, sollte es sein:

intent.setPackage("com.example.alpha.receiverserrvice");