93 lines
4.0 KiB
Java
93 lines
4.0 KiB
Java
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.content;
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import android.os.IBinder;
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/**
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* Interface for monitoring the state of an application service. See
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* {@link android.app.Service} and
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* {@link Context#bindService Context.bindService()} for more information.
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* <p>Like many callbacks from the system, the methods on this class are called
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* from the main thread of your process.
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*/
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public interface ServiceConnection {
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/**
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* Called when a connection to the Service has been established, with
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* the {@link android.os.IBinder} of the communication channel to the
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* Service.
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*
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* <p class="note"><b>Note:</b> If the system has started to bind your
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* client app to a service, it's possible that your app will never receive
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* this callback. Your app won't receive a callback if there's an issue with
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* the service, such as the service crashing while being created.
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*
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* @param name The concrete component name of the service that has
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* been connected.
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*
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* @param service The IBinder of the Service's communication channel,
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* which you can now make calls on.
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*/
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void onServiceConnected(ComponentName name, IBinder service);
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/**
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* Called when a connection to the Service has been lost. This typically
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* happens when the process hosting the service has crashed or been killed.
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* This does <em>not</em> remove the ServiceConnection itself -- this
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* binding to the service will remain active, and you will receive a call
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* to {@link #onServiceConnected} when the Service is next running.
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*
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* @param name The concrete component name of the service whose
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* connection has been lost.
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*/
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void onServiceDisconnected(ComponentName name);
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/**
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* Called when the binding to this connection is dead. This means the
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* interface will never receive another connection. The application will
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* need to unbind and rebind the connection to activate it again. This may
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* happen, for example, if the application hosting the service it is bound to
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* has been updated.
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*
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* <p class="note"><b>Note:</b> The app that requested the binding must call
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* {@link Context#unbindService(ServiceConnection)} to release the tracking
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* resources associated with this ServiceConnection even if this callback was
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* invoked following {@link Context#bindService Context.bindService() bindService()}.
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*
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* @param name The concrete component name of the service whose connection is dead.
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*/
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default void onBindingDied(ComponentName name) {
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}
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/**
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* Called when the service being bound has returned {@code null} from its
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* {@link android.app.Service#onBind(Intent) onBind()} method. This indicates
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* that the attempted service binding represented by this ServiceConnection
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* will never become usable.
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*
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* <p class="note"><b>Note:</b> The app that requested the binding must still call
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* {@link Context#unbindService(ServiceConnection)} to release the tracking
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* resources associated with this ServiceConnection even if this callback was
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* invoked following {@link Context#bindService Context.bindService() bindService()}.
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*
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* @param name The concrete component name of the service whose binding
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* has been rejected by the Service implementation.
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*/
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default void onNullBinding(ComponentName name) {
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}
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}
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