Android多進程通信(1)----代碼架構推薦

在實際的項目中，如果進程A和進程B進行AIDL綁定通信，通常B進程中的Service不止一個。

這時候採用將A進程和B進程的一個MainService綁定，再通過MainService獲得B進程中其他service的接口。這樣一來，綁定了一個MainService就可以與所有service交互。 代碼的架構將清晰明瞭。

進程主Service的AIDL文件IMainInterface.aidl：

interface IMainInterface{
    /**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
    IBinder getFirstService();
    IBinder getSecodService();
}

進程的其他Service的AIDL文件IFirstInterface.aidl和ISecondInterface.aidl

interface IFirstInterface {
    /**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
    String getString(String s);
}

interface ISecondInterface {
    /**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
    int add(int a, int b);
}

新建每個aidl的Stub文件  MyMainStub.java  MyFirstStub.java MySecondStub.java

public class MyMainStub extends IMainInterface.Stub{

    @Override
    public IBinder getFirstService() throws RemoteException {
        return new MyFirstStub();
    }

    @Override
    public IBinder getSecodService() throws RemoteException {
        return new MySecondStub();
    }
}

public class MyFirstStub extends IFirstInterface.Stub{

    @Override
    public String getString(String s) throws RemoteException {
        return s.toUpperCase();
    }
}

public class MySecondStub extends ISecondInterface.Stub {
    @Override
    public int add(int a, int b) throws RemoteException {
        return a+b;
    }
}

新建每個Service文件 MainService.java FirstService.java SecondService.java

public class MainService extends Service {

    MyMainStub myMainStub = new MyMainStub();

    @Override
    public IBinder onBind(Intent intent) {
        return myMainStub;
    }
}

public class FirstService extends Service{

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

public class SecondService extends Service {

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

在進程的非主service當中onbind返回null即可。

在MainActivity當中使用:

serviceConnection = new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        mService = IMainInterface.Stub.asInterface(service);

        /*try {
            IBinder iBinder = mService.getFirstService();
            fService  = IFirstInterface.Stub.asInterface(iBinder);
            mTextView.setText(fService.getString("helloword"));
        } catch (RemoteException e) {
            e.printStackTrace();
        }*/

        try {
            IBinder iBinder = mService.getSecodService();
            sService = ISecondInterface.Stub.asInterface(iBinder);
            mTextView.setText(sService.add(5, 5) + "");
        } catch (RemoteException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
    }
};