关于AIDL的简单认识

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什么是AIDL

AIDL是Android Interface Definition Language, 顾名思义，它主要就是用来定义接口的一种语言。Android提供AIDL主要用来进程

间通讯。

如何使用AIDL

1).创建aidl文件

. 在main文件下新建aidl文件夹

. 创建aidl类

2).编写aidl接口

package com.example.myapplication;// Declare any non-default types here with import statementsinterface IMyService {    /**     * 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);    double doCalculate(double a,double b);

3).如果使用Eclipse，Eclipse会自动在gen目录下生成对应的.java文件，如果是studio，点击Build中make Module 'AIDL'添加到编译

文件中。

4).编写Activity类，点击按钮在服务中实现两个数相加。

package com.example.myapplication;import android.app.Activity;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.graphics.Color;import android.os.Bundle;import android.os.IBinder;import android.os.Parcel;import android.os.Parcelable;import android.os.RemoteException;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;/** * Created by lenovo on 2017/12/3. */public class Person extends Activity {    private static final String TAG = "CalculateClient";    private Button btnCalculate;    private EditText etNum1;    private EditText etNum2;    private TextView tvResult;    private IMyService mService;    private ServiceConnection mServiceConnection = new ServiceConnection() {        @Override        public void onServiceDisconnected(ComponentName name) {            // TODO Auto-generated method stub            //logE("disconnect service");            mService = null;        }        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            // TODO Auto-generated method stub            //logE("connect service");            mService = IMyService.Stub.asInterface(service);        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Bundle args = new Bundle();        Intent intent = new Intent(this, RemoteService.class);        intent.putExtras(args);        bindService(intent, mServiceConnection, Context.BIND_AUTO_CREATE);        etNum1 = (EditText) findViewById(R.id.et_num_one);        etNum2 = (EditText) findViewById(R.id.et_num_two);        tvResult = (TextView) findViewById(R.id.tv_result);        btnCalculate = (Button) findViewById(R.id.btn_cal);        btnCalculate.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                // TODO Auto-generated method stub                //logE("开始远程运算");                try {                    double num1 = Double.parseDouble(etNum1.getText().toString());                    double num2 = Double.parseDouble(etNum2.getText().toString());                    String answer = "计算结果：" + mService.doCalculate(num1, num2);                    tvResult.setTextColor(Color.BLUE);                    tvResult.setText(answer);                } catch (RemoteException e) {                }            }        });    }//    private void logE(String str) {//        Log.e(TAG, "--------" + str + "--------");//    }}

5).最后编写服务类

package com.example.myapplication;import android.app.Service;import android.content.Intent;import android.os.IBinder;import android.os.RemoteException;import android.support.annotation.Nullable;import android.util.Log;import java.util.LinkedList;import java.util.List;/** * Created by lenovo on 2017/12/3. */public class RemoteService extends Service {    private static final String                            TAG                        =    "CalculateService";    @Override    public IBinder onBind(Intent arg0) {        // TODO Auto-generated method stub        logE("onBind()");        return mBinder;    }    @Override    public void onCreate() {        // TODO Auto-generated method stub        logE("onCreate()");        super.onCreate();    }    @Override    public void onStart(Intent intent, int startId) {        // TODO Auto-generated method stub        logE("onStart()");        super.onStart(intent, startId);    }    @Override    public boolean onUnbind(Intent intent) {        // TODO Auto-generated method stub        logE("onUnbind()");        return super.onUnbind(intent);    }    @Override    public void onDestroy() {        // TODO Auto-generated method stub        logE("onDestroy()");        super.onDestroy();    }    private static void logE(String str) {        Log.e(TAG, "--------" + str + "--------");    }    private final IMyService.Stub mBinder = new IMyService.Stub() {        @Override        public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, String aString) throws RemoteException {        }        @Override        public double doCalculate(double a, double b) throws RemoteException {            return a+b;        }//        @Override//        public double doCalculate(int a, int b) throws RemoteException {//            return a+b;//        }//        @Override//        public double doCalculate(double a, double b) throws RemoteException {//            // TODO Auto-generated method stub//            Log.e("Calculate", "远程计算中");//            Calculate calculate = new Calculate();//            double answer = calculate.calculateSum(a, b);//            return answer;//        }    };}

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