android - java.lang.ClassCastException : android. os.BinderProxy 无法转换为 LocalBinder

Question

我有一个 Service，我正试图将其绑定(bind)到我的主要 Activity，但我收到了一个

java.lang.ClassCastException: android.os.BinderProxy 无法转换为 com.walintukai.rubix.ConnectionService$LocalBinder。

我已经在 list 中声明了该服务。为什么会这样？

舱单声明

<service android:name=".ConnectionService" />

服务(简码)

public class ConnectionService extends Service {

static final String TAG = ConnectionService.class.getName();

private BluetoothAdapter mBtAdapter = null;
public BluetoothGatt mBluetoothGatt = null;
private ConnectionServiceEventListener mIRedBearServiceEventListener;
HashMap<String, BluetoothDevice> mDevices = null;
private BluetoothGattCharacteristic txCharc = null;
private final IBinder mBinder = new LocalBinder();

@Override
public IBinder onBind(Intent intent) {
    return mBinder;
}

public class LocalBinder extends Binder {
    public ConnectionService getService() {
        return ConnectionService.this;
    }
}

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

    final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
    mBtAdapter = bluetoothManager.getAdapter();

    if (mBtAdapter == null) 
        return;

    if (mDevices == null) 
        mDevices = new HashMap<String, BluetoothDevice>();
}

@Override
public void onDestroy() {
    if (mBluetoothGatt == null)
        return;

    mBluetoothGatt.close();
    mBluetoothGatt = null;

    super.onDestroy();
}

主要 Activity

public class MainActivity extends ActionBarActivity {

private ConnectionService service;

ServiceConnection connection = new ServiceConnection() {

    @Override
    public void onServiceDisconnected(ComponentName name) {
        Log.i("ConnectionService", "Disconnected");
        service = null;
    }

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        LocalBinder binder = (LocalBinder) service;
        service = (IBinder) binder.getService();

        if (service != null) {
            Log.i("RedBearService", "Connected");

        }
    }
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction().add(R.id.container, ViewPagerFragment.newInstance()).commit();
    }
}

@Override
public void onStart() {
    super.onStart();
    startService();
}

@Override
public void onStop() {
    super.onStop();
    stopService();
}

private void startService() {
    Intent service = new Intent(this, ConnectionService.class);
    bindService(service, connection, Context.BIND_AUTO_CREATE);
}

private void stopService() {
    unbindService(connection);
}

堆栈跟踪

07-30 17:19:39.065: E/AndroidRuntime(20891): java.lang.ClassCastException: android.os.BinderProxy cannot be cast to com.walintukai.rubix.ConnectionService$LocalBinder
07-30 17:19:39.065: E/AndroidRuntime(20891):    at com.walintukai.rubix.MainActivity$1.onServiceConnected(MainActivity.java:58)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1110)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1127)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at android.os.Handler.handleCallback(Handler.java:733)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at android.os.Handler.dispatchMessage(Handler.java:95)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at android.os.Looper.loop(Looper.java:136)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at android.app.ActivityThread.main(ActivityThread.java:5050)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at java.lang.reflect.Method.invokeNative(Native Method)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at java.lang.reflect.Method.invoke(Method.java:515)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
07-30 17:19:39.065: E/AndroidRuntime(20891):    at dalvik.system.NativeStart.main(Native Method)

Answer 1

你把它翻转过来了:

public void onServiceConnected(ComponentName name, IBinder service) {
    LocalBinder binder = (LocalBinder) service;
    service = (IBinder) binder.getService();
    ...
}

应该是:

public void onServiceConnected(ComponentName name, IBinder service) {
    LocalBinder binder = (LocalBinder) service;
    MainActivity.this.service = (ConnectionService) binder.getService();
    ...
}