Android 使用 AIDL 实现进程间通信，使用基本类型作为输入和输出参数
RemoteService
1. 定义 IRemoteService.aidl
package com.zaoqibu.remoteservice;// Declare any non-default types here with import statementsinterface IRemoteService { /** Request the process ID of this service, to do evil things with it. */
int getPid(); /** Demonstrates some basic types that you can use as parameters and return values in AIDL. */
void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, String aString);
}
定义了两个方法，输入和输出参数都是简单类型（int, long, boolean, float, double, String）。
编译程序，将会在 build/generated/ 目录下生成 IRemoteService.java 的文件，里面有 IRemoteService.Stub 服务的存根代理类。
2. 创建服务 RemoteService 类
public class RemoteService extends Service { private static final String TAG = "RemoteService"; @Override
public void onCreate() { super.onCreate();
} @Override
public IBinder onBind(Intent intent) { return binder;
} private final IRemoteService.Stub binder = new IRemoteService.Stub() { public int getPid(){ return Process.myPid();
} public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, String aString) { String str = String.format("anInt:%d, aLong:%d, aBoolean:%b, aFloat:%f, aDouble:%f, aString:%s",
anInt, aLong, aBoolean, aFloat, aDouble, aString); Log.i(TAG, str);
}
};
}
实现存根代理类 IRemoteService.Stub。
3. 在 AndroidManifest.xml 中声明 RemoteService
<service android:name=".RemoteService" android:process=":remote"> <intent-filter> <!-- These are the interfaces supported by the service, which you can bind to. --> <action android:name="com.zaoqibu.remoteservice.IRemoteService" /> </intent-filter> </service>
Client
1. 从 RemoteService 工程中拷贝 IRemoteService.aidl 文件
保持原路径
2. 调用 IRemoteService 方法。
public class MainActivity extends ActionBarActivity { private static final String TAG = "MainActivity"; private IRemoteService iremoteService; @Override
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bindService(new Intent(IRemoteService.class.getName()), serviceConnection, BIND_AUTO_CREATE);
} private ServiceConnection serviceConnection = new ServiceConnection() { // Called when the connection with the service is established
public void onServiceConnected(ComponentName className, IBinder service) { // Following the example above for an AIDL interface,
// this gets an instance of the IRemoteInterface, which we can use to call on the service
iremoteService = IRemoteService.Stub.asInterface(service);
} // Called when the connection with the service disconnects unexpectedly
public void onServiceDisconnected(ComponentName className) { Log.e(TAG, "Service has unexpectedly disconnected");
iremoteService = null;
}
}; public void onRemoteServiceProcessIDClick(View view) { int processID = 0; try {
processID = iremoteService.getPid();
iremoteService.basicTypes(1, 2, true, 3.3f, 4.4, "hello");
} catch (RemoteException e) {
e.printStackTrace();
} TextView remoteServiceProcessID = (TextView)findViewById(R.id.remoteServiceProcessID);
remoteServiceProcessID.setText(String.valueOf(processID));
}
}
3. 运行
