Android programming to implement AIDL (cross process Communication) method detailed _android

The example in this article describes the approach of Android programming to implement Aidl (cross process communication). Share to everyone for your reference, specific as follows:

I. Overview:

Cross-process communication (AIDL), which mainly implements data sharing between processes (applications).

Two. Implementation process:

1. Server-side implementation:

(1) directory structure, as shown below:

(2) Implement *.aidl file:

A. IAIDLSERVICE.AIDL implementation:

Package com.focus.aidl;
Import Com.focus.aidl.Person;
Interface Iaidlservice {
  String getName ();
  Person Getperson ();
}

B. PERSON.AIDL implementation:

Parcelable person;

(3) Transitive objects between processes must implement parcelable or serializable interfaces, and the following is the implementation of the passed person object:

 package com.focus.aidl; import android.os.Parcel; import android.os.Parcelable; public
  Class Person implements parcelable {private String name;
  private int age;
    Public person () {} public person (Parcel source) {name = Source.readstring ();
  Age = Source.readint ();
  Public String GetName () {return name;
  public void SetName (String name) {this.name = name;
  public int getage () {return age;
  public void Setage (int age) {this.age = age;
  public int describecontents () {return 0;
    public void Writetoparcel (Parcel dest, int flags) {dest.writestring (name);
  Dest.writeint (age); public static final parcelable.creator<person> Creator = new creator<person> () {public person[] Newar
    Ray (int size) {return new person[size];
    Createfromparcel (Parcel source) {return new person (source);
}
  }; }

(4) Implement the interface defined in the Iaidlservice.aidl file and define the service to return this implementation class when the service is bind:

Package com.focus.aidl;
Import com.focus.aidl.IAIDLService.Stub;
Import Android.app.Service;
Import android.content.Intent;
Import Android.os.IBinder;
Import android.os.RemoteException;
public class Aidlserviceimpl extends Service {
  @Override public
  ibinder onbind (Intent Intent) {
    return Mbinder;
  }
  /**
   * The interface implementation defined in the Aidl file.
   *
  private iaidlservice.stub Mbinder = new Stub () {public
    String getName () throws RemoteException {
   
    return "Mayingcai";
    }
    Public person Getperson () throws RemoteException {person
      Mperson = new Person ();
      Mperson.setname ("Mayingcai");
      Mperson.setage (in);
      Return Mperson}
    }
  ;
}


   

(5) Registering the service in the Androidmanifest.xml file:

<service android:name = ". Aidlserviceimpl "android:process =": Remote ">
  <intent-filter>
    <action android:name =" Com.focus.aidl.IAIDLService "/>
  </intent-filter>
</service>

2. Client implementation:

(1) directory structure, as shown below:

(2) Copy server-side iaidlservice.aidl,person.aidl and Person.java files to this project, as shown above:

(3) Res/layout/main.xml implementation:

 <?xml version=" 1.0 "encoding=" Utf-8 "?> <linearlayout =" xmlns:android Schemas.android.com/apk/res/android "android:orientation =" vertical "Android:layout_width =" Fill_parent "android:l
    Ayout_height = "Fill_parent" > <textview android:id = "@+id/name" android:layout_width = "Wrap_content" Android:layout_height = "Wrap_content"/> <button android:id = "@+id/connection" Android:layout_wi DTH = "Wrap_content" android:layout_height = "wrap_content" Android:text = "Connection"/> <button Android : id = "@+id/message" android:layout_width = "wrap_content" android:layout_height = "Wrap_content" Android:enab LED = "false" Android:text = "Information"/> <button android:id = "@+id/person" android:layout_width = "WR" Ap_content "android:layout_height =" wrap_content "android:enabled =" false "Android:text =" Person "/> < /linearlayout> 

(4) host activity implementation, from the server side to obtain data on the client display:

Package com.focus.aidl.client;
Import android.app.Activity;
Import Android.content.ComponentName;
Import android.content.Intent;
Import android.content.ServiceConnection;
Import Android.os.Bundle;
Import Android.os.IBinder;
Import android.os.RemoteException;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;
Import Android.widget.TextView;
Import Com.focus.aidl.IAIDLService;
Import Com.focus.aidl.Person;
  public class Aidlclientacitivty extends activity {private Iaidlservice maidlservice;
  Private TextView Mname;
  Private Button mmessage;
  Private Button Mperson;
   /** * The first step is to create the Serviceconnection object and obtain the Iaidlservice implementation in the Onserviceconnected () method. * Private Serviceconnection Mserviceconnection = new Serviceconnection () {public void onserviceconnected (Component
      Name name, IBinder service) {Maidlservice = IAIDLService.Stub.asInterface (service);
      Mmessage.setenabled (TRUE);
    Mperson.setenabled (TRUE); } publicvoid onservicedisconnected (componentname name) {maidlservice = null;
      Mmessage.setenabled (FALSE);
    Mperson.setenabled (FALSE);
  }
  };
    @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.main);
    Mname = (TextView) Findviewbyid (r.id.name); Findviewbyid (r.id.connection). Setonclicklistener (New Onclicklistener () {public void OnClick (view view) {/*
         * * Second step, click the "Connect" button and use Mserviceconnection to bind the service created by the server side.
        * * Intent service = new Intent ("Com.focus.aidl.IAIDLService");
      Bindservice (service, mserviceconnection, bind_auto_create);
    }
    });
    Mmessage = (Button) Findviewbyid (r.id.message); Mmessage.setonclicklistener (New Onclicklistener () {public void OnClick (view view) {/** * Step three, from the server
         The end gets the string.
        * * try {mname.settext (Maidlservice.getname ());
    catch (RemoteException e) {      E.printstacktrace ();
    }
      }
    });
    Mperson = (Button) Findviewbyid (R.id.person); Mperson.setonclicklistener (New Onclicklistener () {public void OnClick (view view) {/** * Fourth step, from server side
         Gets the person object.
          * * try {person Mperson = Maidlservice.getperson ();
        Mname.settext ("Name:" + mperson.getname () + ", Age:" + mperson.getage ());
        catch (RemoteException e) {e.printstacktrace ();
  }
      }
    });

 }
}

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I hope this article will help you with the Android program.