Android 我可以';我不想弄明白:
我有以下抽象类:Android 我可以';我不想弄明白:,android,service,abstract-class,factory,Android,Service,Abstract Class,Factory,我有以下抽象类: public abstract class AbstractService extends Service { @Override public IBinder onBind(Intent intent) { return null; } } 该类由另外两个类扩展: public abstract class AbstractMessengerService extends AbstractService { static final int MSG_REGISTE
public abstract class AbstractService extends Service {
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
该类由另外两个类扩展:
public abstract class AbstractMessengerService extends AbstractService {
static final int MSG_REGISTER_CLIENT = 9991;
static final int MSG_UNREGISTER_CLIENT = 9992;
ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
final Messenger mMessenger = new Messenger(new IncomingHandler()); // Target we publish for clients to send messages to IncomingHandler.
private class IncomingHandler extends Handler { // Handler of incoming messages from clients.
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_REGISTER_CLIENT:
Log.i("MyService", "Client registered: " + msg.replyTo);
mClients.add(msg.replyTo);
break;
case MSG_UNREGISTER_CLIENT:
Log.i("MyService", "Client un-registered: "+msg.replyTo);
mClients.remove(msg.replyTo);
break;
default:
//super.handleMessage(msg);
onReceiveMessage(msg);
}
}
}
@Override
public void onCreate() {
super.onCreate();
onStartService();
Log.i("MyService", "Service Started.");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("MyService", "Received start id " + startId + ": " + intent);
return START_STICKY; // run until explicitly stopped.
}
@Override
public IBinder onBind(Intent intent) {
return mMessenger.getBinder();
}
@Override
public void onDestroy() {
super.onDestroy();
onStopService();
Log.i("MyService", "Service Stopped.");
}
protected void send(Message msg) {
for (int i=mClients.size()-1; i>=0; i--) {
try {
Log.i("MyService", "Sending message to clients: "+msg);
mClients.get(i).send(msg);
}
catch (RemoteException e) {
// The client is dead. Remove it from the list; we are going through the list from back to front so this is safe to do inside the loop.
Log.e("MyService", "Client is dead. Removing from list: "+i);
mClients.remove(i);
}
}
}
public abstract void onStartService();
public abstract void onStopService();
public abstract void onReceiveMessage(Message msg);
}
但由于某些原因,这些行:
this.mServiceClass=(AbstractAIDLService)serviceClass代码>,this.mServiceClass=(AbstractMessengerService)服务类代码>给我一个铸造问题。如何做到这一点?我认为在您的ServiceManager
中,您不能将AbstractAIDLService
或AbstractMessenger服务
分配给类是的,我确实可以这样做,但我想做的是将传递类的具体类,而不是抽象类,传递给ServiceManager中的构造函数。我知道的唯一解决方案是创建两个getter方法,两种类型各一个,因为如果只有一个getter,则需要返回超级抽象类:AbstractService getService()代码>
public abstract class AbstractAIDLService extends AbstractService {
private Handler handler;
ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
private final IRemoteService.Stub mBinder = new IRemoteService.Stub() {
public int getPid(){
return android.os.Process.myPid();
}
@Override
public void setActivityColor(String color, long startTime) throws RemoteException {
long elpsedTime = (System.nanoTime() - startTime) / (1000 * 1000);
showElpesedTime(String.valueOf(elpsedTime));
}
public void basicTypes(int anInt, long aLong, boolean aBoolean,
float aFloat, double aDouble, String aString) {
// Does nothing
}
};
private void showElpesedTime(final String time)
{
handler.post(new Runnable() {
public void run() {
Toast toast = Toast.makeText(AbstractAIDLService.this, "Time passed reaching the server: "+time+"ms", Toast.LENGTH_SHORT);
toast.show();
}
});
}
@Override
public void onCreate() {
super.onCreate();
onStartService();
Log.i("MyService", "Service Started.");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("MyService", "Received start id " + startId + ": " + intent);
return START_STICKY; // run until explicitly stopped.
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
@Override
public void onDestroy() {
super.onDestroy();
onStopService();
Log.i("MyService", "Service Stopped.");
}
public abstract void onStartService();
public abstract void onStopService();
public abstract void onReceiveMessage(Message msg);
}
public class ServiceManager {
private static final String TAG = ServiceManager.class.getSimpleName();
private Class<? extends AbstractService> mServiceClass;
public ServiceManager(Context context, ServiceType type, Class<? extends AbstractService> serviceClass, Handler incomingHandler) {
this.mActivity = context;
this.mIncomingHandler = incomingHandler;
if (type.equals(ServiceType.AIDL)) {
this.mServiceClass = (AbstractAIDLService) serviceClass;
} else if (type.equals(ServiceType.MESSENGER)) {
this.mServiceClass = (AbstractMessengerService) serviceClass;
}
if (isRunning()) {
doBindService();
}
}
public class ServiceManager {
private static final String TAG = ServiceManager.class.getSimpleName();
private AbstractService mServiceClass;
public ServiceManager(Context context, ServiceType type, AbstractService serviceClass, Handler incomingHandler) {
this.mActivity = context;
this.mIncomingHandler = incomingHandler;
this.mServiceClass = serviceClass;
if (isRunning()) {
doBindService();
}
}