웹 기반 REST API를 호출하는 데 사용할 수있는 서비스를 만들고 싶습니다.

기본적으로 앱 init에서 서비스를 시작한 다음 해당 서비스에 URL을 요청하고 결과를 반환하도록 요청할 수 있기를 원합니다. 그 동안 진행률 창이나 비슷한 것을 표시하고 싶습니다.

나는 현재 IDL을 사용하는 서비스를 만들었습니다. 앱 간 통신을 위해 실제로 필요한 부분을 읽었 으므로이 부분을 제거해야하지만 콜백을 수행하는 방법이 확실하지 않다고 생각하십시오. 또한 post(Config.getURL("login"), values)응용 프로그램을 칠 때 응용 프로그램이 잠시 일시 중지 된 것처럼 보입니다 (이상한 것으로 보입니다-서비스의 아이디어는 다른 스레드에서 실행된다는 생각이었습니다!)

현재 내부에 post 및 get HTTP 메소드가있는 서비스가 있으며, 두 가지 AIDL 파일 (양방향 통신용), 서비스 시작, 중지, 바인딩 등을 처리하는 ServiceManager가 있으며 특정 코드로 처리기를 동적으로 작성하고 있습니다 필요에 따라 콜백

누구든지 나에게 완전한 코드 기반을 제공하기를 원하지 않지만 일부 포인터는 크게 감사하겠습니다.

(주로) 전체 코드 :

public class RestfulAPIService extends Service  {

final RemoteCallbackList<IRemoteServiceCallback> mCallbacks = new RemoteCallbackList<IRemoteServiceCallback>();

public void onStart(Intent intent, int startId) {
    super.onStart(intent, startId);
}
public IBinder onBind(Intent intent) {
    return binder;
}
public void onCreate() {
    super.onCreate();
}
public void onDestroy() {
    super.onDestroy();
    mCallbacks.kill();
}
private final IRestfulService.Stub binder = new IRestfulService.Stub() {
    public void doLogin(String username, String password) {

        Message msg = new Message();
        Bundle data = new Bundle();
        HashMap<String, String> values = new HashMap<String, String>();
        values.put("username", username);
        values.put("password", password);
        String result = post(Config.getURL("login"), values);
        data.putString("response", result);
        msg.setData(data);
        msg.what = Config.ACTION_LOGIN;
        mHandler.sendMessage(msg);
    }

    public void registerCallback(IRemoteServiceCallback cb) {
        if (cb != null)
            mCallbacks.register(cb);
    }
};

private final Handler mHandler = new Handler() {
    public void handleMessage(Message msg) {

        // Broadcast to all clients the new value.
        final int N = mCallbacks.beginBroadcast();
        for (int i = 0; i < N; i++) {
            try {
                switch (msg.what) {
                case Config.ACTION_LOGIN:
                    mCallbacks.getBroadcastItem(i).userLogIn( msg.getData().getString("response"));
                    break;
                default:
                    super.handleMessage(msg);
                    return;

                }
            } catch (RemoteException e) {
            }
        }
        mCallbacks.finishBroadcast();
    }
    public String post(String url, HashMap<String, String> namePairs) {...}
    public String get(String url) {...}
};

몇 가지 AIDL 파일 :

package com.something.android

oneway interface IRemoteServiceCallback {
    void userLogIn(String result);
}

과

package com.something.android
import com.something.android.IRemoteServiceCallback;

interface IRestfulService {
    void doLogin(in String username, in String password);
    void registerCallback(IRemoteServiceCallback cb);
}

서비스 관리자 :

public class ServiceManager {

    final RemoteCallbackList<IRemoteServiceCallback> mCallbacks = new RemoteCallbackList<IRemoteServiceCallback>();
    public IRestfulService restfulService;
    private RestfulServiceConnection conn;
    private boolean started = false;
    private Context context;

    public ServiceManager(Context context) {
        this.context = context;
    }

    public void startService() {
        if (started) {
            Toast.makeText(context, "Service already started", Toast.LENGTH_SHORT).show();
        } else {
            Intent i = new Intent();
            i.setClassName("com.something.android", "com.something.android.RestfulAPIService");
            context.startService(i);
            started = true;
        }
    }

    public void stopService() {
        if (!started) {
            Toast.makeText(context, "Service not yet started", Toast.LENGTH_SHORT).show();
        } else {
            Intent i = new Intent();
            i.setClassName("com.something.android", "com.something.android.RestfulAPIService");
            context.stopService(i);
            started = false;
        }
    }

    public void bindService() {
        if (conn == null) {
            conn = new RestfulServiceConnection();
            Intent i = new Intent();
            i.setClassName("com.something.android", "com.something.android.RestfulAPIService");
            context.bindService(i, conn, Context.BIND_AUTO_CREATE);
        } else {
            Toast.makeText(context, "Cannot bind - service already bound", Toast.LENGTH_SHORT).show();
        }
    }

    protected void destroy() {
        releaseService();
    }

    private void releaseService() {
        if (conn != null) {
            context.unbindService(conn);
            conn = null;
            Log.d(LOG_TAG, "unbindService()");
        } else {
            Toast.makeText(context, "Cannot unbind - service not bound", Toast.LENGTH_SHORT).show();
        }
    }

    class RestfulServiceConnection implements ServiceConnection {
        public void onServiceConnected(ComponentName className, IBinder boundService) {
            restfulService = IRestfulService.Stub.asInterface((IBinder) boundService);
            try {
            restfulService.registerCallback(mCallback);
            } catch (RemoteException e) {}
        }

        public void onServiceDisconnected(ComponentName className) {
            restfulService = null;
        }
    };

    private IRemoteServiceCallback mCallback = new IRemoteServiceCallback.Stub() {
        public void userLogIn(String result) throws RemoteException {
            mHandler.sendMessage(mHandler.obtainMessage(Config.ACTION_LOGIN, result));

        }
    };

    private Handler mHandler;

    public void setHandler(Handler handler) {
        mHandler = handler;
    }
}

서비스 초기화 및 바인딩 :

// this I'm calling on app onCreate
servicemanager = new ServiceManager(this);
servicemanager.startService();
servicemanager.bindService();
application = (ApplicationState)this.getApplication();
application.setServiceManager(servicemanager);

서비스 기능 호출 :

// this lot i'm calling as required - in this example for login
progressDialog = new ProgressDialog(Login.this);
progressDialog.setMessage("Logging you in...");
progressDialog.show();

application = (ApplicationState) getApplication();
servicemanager = application.getServiceManager();
servicemanager.setHandler(mHandler);

try {
    servicemanager.restfulService.doLogin(args[0], args[1]);
} catch (RemoteException e) {
    e.printStackTrace();
}

...later in the same file...

Handler mHandler = new Handler() {
    public void handleMessage(Message msg) {

        switch (msg.what) {
        case Config.ACTION_LOGIN:

            if (progressDialog.isShowing()) {
                progressDialog.dismiss();
            }

            try {
                ...process login results...
                }
            } catch (JSONException e) {
                Log.e("JSON", "There was an error parsing the JSON", e);
            }
            break;
        default:
            super.handleMessage(msg);
        }

    }

};

답변

public class HomeActivity extends Activity implements MyResultReceiver.Receiver {

    public MyResultReceiver mReceiver;

    public void onCreate(Bundle savedInstanceState) {
        mReceiver = new MyResultReceiver(new Handler());
        mReceiver.setReceiver(this);
        ...
        final Intent intent = new Intent(Intent.ACTION_SYNC, null, this, QueryService.class);
        intent.putExtra("receiver", mReceiver);
        intent.putExtra("command", "query");
        startService(intent);
    }

    public void onPause() {
        mReceiver.setReceiver(null); // clear receiver so no leaks.
    }

    public void onReceiveResult(int resultCode, Bundle resultData) {
        switch (resultCode) {
        case RUNNING:
            //show progress
            break;
        case FINISHED:
            List results = resultData.getParcelableList("results");
            // do something interesting
            // hide progress
            break;
        case ERROR:
            // handle the error;
            break;
    }
}

public class QueryService extends IntentService {
    protected void onHandleIntent(Intent intent) {
        final ResultReceiver receiver = intent.getParcelableExtra("receiver");
        String command = intent.getStringExtra("command");
        Bundle b = new Bundle();
        if(command.equals("query") {
            receiver.send(STATUS_RUNNING, Bundle.EMPTY);
            try {
                // get some data or something           
                b.putParcelableArrayList("results", results);
                receiver.send(STATUS_FINISHED, b)
            } catch(Exception e) {
                b.putString(Intent.EXTRA_TEXT, e.toString());
                receiver.send(STATUS_ERROR, b);
            }    
        }
    }
}

public class MyResultReceiver implements ResultReceiver {
    private Receiver mReceiver;

    public MyResultReceiver(Handler handler) {
        super(handler);
    }

    public void setReceiver(Receiver receiver) {
        mReceiver = receiver;
    }

    public interface Receiver {
        public void onReceiveResult(int resultCode, Bundle resultData);
    }

    @Override
    protected void onReceiveResult(int resultCode, Bundle resultData) {
        if (mReceiver != null) {
            mReceiver.onReceiveResult(resultCode, resultData);
        }
    }
}