我正在开发Android上的GPS跟踪软件。我需要IPC来控制来自不同活动的服务。因此，我决定使用AIDL开发远程服务。这不是什么大问题，但是现在它总是在接口的方法中运行，而不是在我的服务类中。也许有人可以帮助我？
这是我的AIDL文件：
package test.de.android.tracker
interface ITrackingServiceRemote {
void startTracking(in long trackId);
void stopTracking();
void pauseTracking();
void resumeTracking(in long trackId);
long trackingState();
}
这是我的服务类的简短版本：
public class TrackingService extends Service implements LocationListener{
private LocationManager mLocationManager;
private TrackDb db;
private long trackId;
private boolean isTracking = false;
@Override
public void onCreate() {
super.onCreate();
mNotificationManager = (NotificationManager) this
.getSystemService(NOTIFICATION_SERVICE);
mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
db = new TrackDb(this.getApplicationContext());
}
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
}
@Override
public void onDestroy(){
//TODO
super.onDestroy();
}
@Override
public IBinder onBind(Intent intent){
return this.mBinder;
}
private IBinder mBinder = new ITrackingServiceRemote.Stub() {
public void startTracking(long trackId) throws RemoteException {
TrackingService.this.startTracking(trackId);
}
public void pauseTracking() throws RemoteException {
TrackingService.this.pauseTracking();
}
public void resumeTracking(long trackId) throws RemoteException {
TrackingService.this.resumeTracking(trackId);
}
public void stopTracking() throws RemoteException {
TrackingService.this.stopTracking();
}
public long trackingState() throws RemoteException {
long state = TrackingService.this.trackingState();
return state;
}
};
public synchronized void startTracking(long trackId) {
// request updates every 250 meters or 0 sec
this.trackId = trackId;
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
0, 250, this);
isTracking = true;
}
public synchronized long trackingState() {
if(isTracking){
return trackId;
} else
return -1;
}
public synchronized void stopTracking() {
if(isTracking){
mLocationManager.removeUpdates(this);
isTracking = false;
} else
Log.i(TAG, "Could not stop because service is not tracking at the moment");
}
public synchronized void resumeTracking(long trackId) {
if(!isTracking){
this.trackId = trackId;
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
0, 250, this);
isTracking = true;
} else
Log.i(TAG, "Could not resume because service is tracking already track " + this.trackId);
}
public synchronized void pauseTracking() {
if(isTracking){
mLocationManager.removeUpdates(this);
isTracking = false;
} else
Log.i(TAG, "Could not pause because service is not tracking at the moment");
}
public void onLocationChanged(Location location) {
//TODO
}
为了方便从客户端进行访问，我编写了一个ServiceManager类，该类设置了ServiceConnection，您可以调用服务方法。这是我的代码：
public class TrackingServiceManager{
private static final String TAG = "TrackingServiceManager";
private ITrackingServiceRemote mService = null;
private Context mContext;
private Boolean isBound = false;
private ServiceConnection mServiceConnection;
public TrackingServiceManager(Context ctx){
this.mContext = ctx;
}
public void start(long trackId) {
if (isBound && mService != null) {
try {
mService.startTracking(trackId);
} catch (RemoteException e) {
Log.e(TAG, "Could not start tracking!",e);
}
} else
Log.i(TAG, "No Service bound! 1");
}
public void stop(){
if (isBound && mService != null) {
try {
mService.stopTracking();
} catch (RemoteException e) {
Log.e(TAG, "Could not stop tracking!",e);
}
} else
Log.i(TAG, "No Service bound!");
}
public void pause(){
if (isBound && mService != null) {
try {
mService.pauseTracking();
} catch (RemoteException e) {
Log.e(TAG, "Could not pause tracking!",e);
}
} else
Log.i(TAG, "No Service bound!");
}
public void resume(long trackId){
if (isBound && mService != null) {
try {
mService.resumeTracking(trackId);
} catch (RemoteException e) {
Log.e(TAG, "Could not resume tracking!",e);
}
} else
Log.i(TAG, "No Service bound!");
}
public float state(){
if (isBound && mService != null) {
try {
return mService.trackingState();
} catch (RemoteException e) {
Log.e(TAG, "Could not resume tracking!",e);
return -1;
}
} else
Log.i(TAG, "No Service bound!");
return -1;
}
/**
* Method for binding the Service with client
*/
public boolean connectService(){
mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
TrackingServiceManager.this.mService = ITrackingServiceRemote.Stub.asInterface(service);
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
if (mService != null) {
mService = null;
}
}
};
Intent mIntent = new Intent("test.de.android.tracker.action.intent.TrackingService");
this.isBound = this.mContext.bindService(mIntent, mServiceConnection, Context.BIND_AUTO_CREATE);
return this.isBound;
}
public void disconnectService(){
this.mContext.unbindService(mServiceConnection);
this.isBound = false;
}
}
如果我现在尝试从活动中调用一个方法，例如start（trackId），则什么也不会发生。绑定确定。调试时，它始终会在生成的ITrackingServiceRemote.java文件中的startTracking（）中运行，而不是在我的TrackingService类中运行。问题出在哪里？我找不到任何错误。
提前致谢！
托比亚斯
最佳答案
我需要IPC来控制来自
不同的活动。所以我决定
使用AIDL开发远程服务。
您不需要IPC来控制来自不同活动的服务。您可能需要IPC来控制来自不同应用程序的服务（即，单独的APK）。
调试时，它总是会遇到
在生成的startTracking（）
ITrackingServiceRemote.java文件和
不在我的TrackingService类中。
您的活动有一个代表服务接口的客户端代理。该服务本身应该与完全独立的APK在完全独立的进程中运行。
我建议您摆脱AIDL并切换回本地绑定模式，至少要足够长的时间才能使您的活动和服务正常工作。然后，直到那时，您才应该将它们拉成单独的APK，如果这确实是期望的结果。
关于android - Android远程服务不调用服务方法，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/2930890/