进程间通信Aidl的简单案例

  最近，在学习Android进程间通信，发现用的比较多的是aidl,想在网上找点demo来看一下，但是我找了很久，没找到我觉得满意的代码，要么是文字写的太含蓄了看不懂，要么是代码长的看不进去，其实我就是想找个demo运行一下，看一看效果再来分析其中aidl的原理，于是就自己敲了一个demo，仅供参考，如下：

首先是写服务端代码：

ICat.aidl代码：

packagestartimes.com.aidlservice;

// Declare any non-default types here with import statements

interface ICat {    String getColor();    double getWeight();}

AidlService.java代码：

public class AidlService extends Service {   private CatBinder catBinder;    Timer timer=new Timer();    String[] colors=new String[]{"红色","黄色","黑色"};    double[] weights=new double[]{2.3,3.1,1.58};    private String color;    private double weight; //继承Stub,也就是实现了ICat接口，并实现了IBinder接口    public class CatBinder extends ICat.Stub    {     @Override      public String getColor() throws RemoteException {        return color;      }     @Override      public double getWeight() throws RemoteException {        return weight;      }    }     @Override  public void onCreate() {    super.onCreate();    catBinder=new CatBinder();    timer.schedule(new TimerTask(){      @Override      public void run() {        //随机地改变Service组件内color,weight属性的值        int rand= (int) (Math.random()*3);        color=colors[rand];        weight=weights[rand];        System.out.println("--------"+rand);      }    },0,800);  }  @Nullable    @Override    public IBinder onBind(Intent intent) {      //返回catBinder对象，在绑定本地Service的情况下，该catBinder    //对象会直接传给客户端的ServiceConnection对象的onServiceConnected    //方法的第二个参数；在绑定远程Service的情况下，只将catBinder对象的代理    //传给客户端的ServiceConnection对象的onServiceConnected方法的第二个参数；        return catBinder;    }  @Override  public void onDestroy() {    timer.cancel();  }}

MainActivity.java中代码：

public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }}

AndroidManifest.xml中添加:

<service    android:name=".AidlService"    android:enabled="true"    android:exported="true">    <intent-filter>        <action android:name="startimes.com.aidlservice.Aidl_Service"/>    </intent-filter></service>

运行一下看一看。

然后将服务端aidl文件夹拷到客户端中，客户端代码：

public class AidlClient extends Activity {    private ICat catService;    private Button get;    EditText color,weight;    private ServiceConnection conn=new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {            //获取远程Service的onBind方法返回的对象代理            catService=ICat.Stub.asInterface(iBinder);            get.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    try {                        //获取，并显示远程Service的状态                        color.setText(catService.getColor());                        Toast.makeText(AidlClient.this,catService.getColor()+"",Toast.LENGTH_LONG).show();                        weight.setText(catService.getWeight()+"");                    }catch (Exception e){                        e.printStackTrace();                    }                }            });        }        @Override        public void onServiceDisconnected(ComponentName componentName) {            catService=null;        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_aidl_client);        get= (Button) findViewById(R.id.get);        color= (EditText) findViewById(R.id.color);        weight= (EditText) findViewById(R.id.weight);        //创建所需绑定服务的Intent        Intent intent = new Intent();        intent.setAction("startimes.com.aidlservice.Aidl_Service");        //绑定远程服务        bindService(intent,conn, Service.BIND_AUTO_CREATE);    }    @Override    protected void onDestroy() {        super.onDestroy();        //解除绑定        this.unbindService(conn);    }}

布局代码：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical"   ><Button    android:id="@+id/get"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="获取远程服务"    />   <EditText       android:id="@+id/color"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:hint="颜色"       />   <EditText       android:id="@+id/weight"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:hint="权重"       /></LinearLayout>

注意：先运行服务端代码，会退后，在运行客户端代码，效果

服务端：

客户端：

代码链接：https://github.com/HotBloodMan/CommonCode/blob/master/AIDLdemo.zip