mainActivity
public class MainActivity extends AppCompatActivity {
private static final String SERVER_PACKAGE = "lite.bluelight.jdk.com.aidlservice";
private static final String SERVER_ACTION = "lite.bluelight.jdk.com.aidlservice";
private IRemoteService mRemoteService;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent serviceIntent = new Intent(SERVER_ACTION);
serviceIntent.setPackage(SERVER_PACKAGE);
getApplication().bindService(serviceIntent, serviceConnection, Context.BIND_AUTO_CREATE);
startService(serviceIntent);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
int sum = mRemoteService.sum(2, 5);
Toast.makeText(getApplicationContext(), String.valueOf(sum), Toast.LENGTH_SHORT).show();
} catch (RemoteException e) {
e.printStackTrace();
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindService(serviceConnection);
}
public ServiceConnection serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
Log.e("DDDD", "Service has unexpectedly onServiceConnected");
mRemoteService = IRemoteService.Stub.asInterface(service);
}
@Override
public void onServiceDisconnected(ComponentName name) {
Log.e("DDDD", "Service has unexpectedly onServiceDisconnected");
mRemoteService = null;
}
};
}
ServerService.java
public class ServerService extends Service {
@Override
public IBinder onBind(Intent intent) {
return new IRemoteServiceImpl();
}
private class IRemoteServiceImpl extends IRemoteService.Stub {
@Override
public int sum(int a, int b) throws RemoteException {
Log.e("DDDD", "DDDDDDDDDDDDDDDDD");
return a + b;
}
}
}
FATAL EXCEPTION: main
Process: lite.bluelight.jdk.com.aidlservice, PID: 3397
java.lang.NullPointerException: Attempt to invoke interface method 'int lite.bluelight.jdk.com.aidl.IRemoteService.sum(int, int)' on a null object reference
at lite.bluelight.jdk.com.aidlservice.MainActivity$1.onClick(MainActivity.java:41)
에러는 이렇게 나옵니다..
답변 부탁드립니다.
