项目运用AIDL实现进程通信

基本步骤

remoteService

1、生成aidl文件（先生成java的接口文件，修改后缀名为aidl，去掉public）

2、定义业务服务StudentQueryService及其内部类StudentQueryBinder

3、实现StudentQueryService的onBind()和query()

4、在manifest中配置服务信息

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实现的代码

1、生成aidl文件

interface StudentQuery {
	String queryStudent(int number);
}

2、定义业务服务StudentQueryService及其内部类StudentQueryBinder

public class StudentQueryService extends Service {
	private final class StudentQueryBinder extends StudentQuery.Stub{
		public String queryStudent(int number) throws RemoteException {			
			return query(number);
		}		
	}
}

3、实现StudentQueryService的onBind()和query()

@Override
	public IBinder onBind(Intent intent) {
		return binder;
	}
	private String query(int number){
		if(number > 0 && number < 4){
			return names[number - 1];
		}
		return null;
	}

4、在manifest中配置服务信息

       <service android:name=".StudentQueryService">
            <intent-filter >
                <action android:name="com.peter.remoteservice.queryinfo"/>                
            </intent-filter>            
        </service>

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remoteServiceClient的基本操作和实现代码

基本操作

1、新建工程和Activity, copy刚才的aidl文件到src下

2、在Activity中添加StudentQuery属性，新建内部类StudentConnection

3、实现onCreate() onDestroy()、按钮处理事件、业务逻辑方法等

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实现代码

2、在Activity中添加StudentQuery属性，新建内部类StudentConnection

private StudentQuery studentQuery;
private final class StudentConnection implements ServiceConnection {
		public void onServiceConnected(ComponentName name, IBinder service) {
			studentQuery = StudentQuery.Stub.asInterface(service);
		}
		public void onServiceDisconnected(ComponentName name) {
			studentQuery = null;
		}
	}

3、实现onCreate() onDestroy()、按钮处理事件、业务逻辑方法等

@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		numberText = (EditText) this.findViewById(R.id.number);
		resultView = (TextView) this.findViewById(R.id.resultView);
		Intent intent = new Intent("com.peter.remoteservice.queryinfo");
		bindService(intent, conn, BIND_AUTO_CREATE);
	}

	public void queryStudent(View v) {
		String number = numberText.getText().toString();
		int num = Integer.valueOf(number);
		try {
			resultView.setText(studentQuery.queryStudent(num));
		} catch (RemoteException e) {
			e.printStackTrace();
		}
	}

	@Override
	protected void onDestroy() {
		unbindService(conn);
		super.onDestroy();
	}