Android 创建远程服务（通过AIDL）
示例
通过.aidl文件描述您的服务访问界面：
//IRemoteService.aidl
package com.example.android;
//在这里使用import语句声明所有非默认类型
/** Example service interface */
interface IRemoteService {
/** Request the process ID of this service, to do evil things with it. */
int getPid();
}现在，在构建应用程序之后，sdk工具将生成适当的.java文件。该文件将包含Stub实现我们的aidl接口的类，并且需要扩展它：
public class RemoteService extends Service {
private finalIRemoteService.Stubbinder = new IRemoteService.Stub() {
@Override
public int getPid() throws RemoteException {
return Process.myPid();
}
};
@Nullable
@Override
public IBinder onBind(Intent intent) {
return binder;
}
}然后在活动中：
public class MainActivity extends AppCompatActivity {
private final ServiceConnection connection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
IRemoteService service = IRemoteService.Stub.asInterface(iBinder);
Toast.makeText(this, "活动过程： " +Process.myPid+ ", Service process: " + getRemotePid(service), LENGTH_SHORT).show();
}
@Override
public void onServiceDisconnected(ComponentName componentName) {}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onStart() {
super.onStart();
Intent intent = new Intent(this, RemoteService.class);
bindService(intent, connection, Context.BIND_AUTO_CREATE);
}
@Override
protected void onStop() {
super.onStop();
unbindService(connection);
}
private int getRemotePid(IRemoteService service) {
int result = -1;
try {
result = service.getPid();
} catch (RemoteException e) {
e.printStackTrace();
}
return result;
}
}