AIDL(2):服务端回调客户端
2024-08-25 13:39:09
1.大致流程
- 在服务端声明远程服务接口IRemoteService.aidl,并声明回调接口ICallback.aidl
- 在服务端实现远程服务接口IRemoteService.Stub
- 使用RemoteCallbackList保存回调接口列表
- 发布服务
- 在客户端实现回调接口 ICallback.Stub
- 绑定服务,注册回调接口
- 调用服务
- 远程服务从RemoteCallbackList中找到回调,然后调用.
2.服务端
2.1 声明服务接口IRemoteService.aidl
// IRemoteService.aidl package com.example.ee.aidl; import com.example.ee.aidl.ICallback; interface IRemoteService { int getPid(); oneway void fun1(); void registerCallback(ICallback cb); void unregisterCallback(ICallback cb); }
2.2 声明回调接口ICallback.aidl
// ICallback.aidl package com.example.ee.aidl; interface ICallback { oneway void fun2(); }
2.3 实现服务,用 RemoteCallbackList 保存回调接口.
package com.example.ee.aidl; import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.os.Process; import android.os.RemoteCallbackList; import android.os.RemoteException; import android.support.annotation.Nullable; import android.util.Log; public class RemoteService extends Service { final String TAG = "RemoteService"; private RemoteBinder binder = new RemoteBinder(); private RemoteCallbackList<ICallback> callbackList = new RemoteCallbackList<>(); @Nullable @Override public IBinder onBind(Intent intent) { return binder; } class RemoteBinder extends IRemoteService.Stub{ void callback(){ int count = callbackList.beginBroadcast(); try { ; i < count; i++) { callbackList.getBroadcastItem(i).fun2(); } } catch (RemoteException e) { Log.e(TAG, e.getMessage()); } finally { } callbackList.finishBroadcast(); } @Override public int getPid() throws RemoteException { return Process.myPid(); } @Override public void fun1() throws RemoteException { Log.d(TAG, "fun1 in remote service "); callback(); } @Override public void registerCallback(ICallback cb) throws RemoteException { callbackList.register(cb); } @Override public void unregisterCallback(ICallback cb) throws RemoteException { callbackList.unregister(cb); } } }
2.4 发布服务
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.ee.aidl"> <application android:allowBackup="false" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:name=".AidlApp" android:theme="@style/AppTheme"> <!--<meta-data android:name="APP_CHANNEL" android:value="${APP_CHANNEL}" /> --> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name=".RemoteService" android:process=".RemoteService" android:exported="true"/> </application> </manifest>
3.客户端
3.1 实现回调接口
private ICallback callback = new ICallback.Stub(){ @Override public void fun2() throws RemoteException { Log.d(TAG, "fun2 in client "); } };
3.2 绑定远程服务,注册回调
private void bindRemoteService(){ connection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { remoteService = IRemoteService.Stub.asInterface(service); try { remoteService.registerCallback(callback); } catch (RemoteException e) { e.printStackTrace(); } } @Override public void onServiceDisconnected(ComponentName name) { } }; Intent intent = new Intent(this,RemoteService.class); boolean ret = bindService(intent,connection, BIND_AUTO_CREATE); if (!ret ){ Log.e(TAG, "bindRemoteService: bind failed."); } }
3.3 调用远程服务
public void onClick(View view){ if(view.getId() == R.id.btn_call_remote){ AidlApp app = (AidlApp) getApplication(); if (app.remoteService != null){ try { int pid = app.remoteService.getPid(); Log.d(TAG, "onServiceConnected: remote pid = " + pid); app.remoteService.fun1(); } catch (RemoteException e) { e.printStackTrace(); } }else { Snackbar.make(view,"remote service unbinded",Snackbar.LENGTH_SHORT).show(); } } }
4. 远程服务调用回调
void callback(){ int count = callbackList.beginBroadcast(); try { ; i < count; i++) { callbackList.getBroadcastItem(i).fun2(); } } catch (RemoteException e) { Log.e(TAG, e.getMessage()); } finally { } callbackList.finishBroadcast(); }
5.下载
https://gitee.com/xi/RemoteCallbackList.git
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