服务Service之绑定服务（远程服务）

来源：互联网发布：北京知蜂堂上海店编辑：程序博客网时间：2024/05/17 09:04

在上一篇已经说过启动服务了，今天给大家，讲讲绑定服务。

绑定服务
当应用组件通过调用 bindService() 绑定到服务时，服务即处于“绑定”状态。绑定服务提供了一个客户端-服务器接口，允许组件与服务进行交互、发送请求、获取结果，甚至是利用进程间通信 (IPC) 跨进程执行这些操作。仅当与另一个应用组件绑定时，绑定服务才会运行。多个组件可以同时绑定到该服务，但全部取消绑定后，该服务即会被销毁。

下面举个例子，通过AIDL远程调用Service

1.MainActivity.xml

<?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:id="@+id/activity_main"    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"    tools:context="com.zking.hgz_android_23_service_qq.MainActivity">    <EditText        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="admin"        android:id="@+id/et_main_name"        />    <EditText        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="123456"        android:id="@+id/et_main_pwd"/>    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="Login"        android:text="登录"        /></LinearLayout>

2.MyLonginService

package com.zking.hgz_android_23_service_qq;import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.IBinder;import android.os.RemoteException;import android.support.annotation.Nullable;import android.util.Log;import android.widget.Toast;import java.util.Map;/** * Created by hgz on 2017/2/12. */public class MyLonginService extends Service {    class MyBind extends MyLoginInterfaceOut.Stub{        @Override        public boolean Login(String name, String pwd) throws RemoteException {            if("admin".equals(name)&&"123456".equals(pwd)){                return true;            }            return false;        }        @Override        public User login2(Map map) throws RemoteException {            String name=map.get("name").toString();            String pwd=map.get("pwd").toString();            if("admin".equals(name)&&"123456".equals(pwd)){                User user=new User("柱子",name,pwd);                return user;            }            return null;        }    }    @Nullable    @Override    public IBinder onBind(Intent intent) {        Log.i("text","onBind");        return new MyBind();    }}

3.User

package com.zking.hgz_android_23_service_qq;import android.os.Parcel;import android.os.Parcelable;/** * Created by hgz on 2017/2/13. */public class User implements Parcelable{    private String uname;    private String number;    private String pwd;    public User() {    }    public User(String uname, String number, String pwd) {        this.uname = uname;        this.number = number;        this.pwd = pwd;    }    public String getUname() {        return uname;    }    public void setUname(String uname) {        this.uname = uname;    }    public String getNumber() {        return number;    }    public void setNumber(String number) {        this.number = number;    }    public String getPwd() {        return pwd;    }    public void setPwd(String pwd) {        this.pwd = pwd;    }    @Override    public int describeContents() {        return 0;    }    @Override    public void writeToParcel(Parcel dest, int flags) {        dest.writeString(uname);        dest.writeString(number);        dest.writeString(pwd);    }    public static final Parcelable.Creator<User> CREATOR = new Parcelable.Creator<User>(){        @Override        public User createFromParcel(Parcel source) {            User user=new User();            user.setUname(source.readString());            user.setNumber(source.readString());            user.setPwd(source.readString());            return user;        }        @Override        public User[] newArray(int size) {            return new User[size];        }    };}

4.MyLoginInterface

package com.zking.hgz_android_23_service_qq;import java.util.Map;/** * Created by hgz on 2017/2/12. */public interface MyLoginInterface {    public boolean Login(String name,String pwd);    public User login2(Map<String,Object> map);}

5.MyLoginInterfaceOut.aidl

// MyLoginInterfaceOut.aidlpackage com.zking.hgz_android_23_service_qq;import com.zking.hgz_android_23_service_qq.User;interface MyLoginInterfaceOut {    boolean Login(String name,String pwd);    User login2(in Map map);}

6.User.aidl

// UserOut.aidlpackage com.zking.hgz_android_23_service_qq;import com.zking.hgz_android_23_service_qq.User;parcelable User;

7.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.zking.hgz_android_23_service_qq">    <application android:allowBackup="true" android:icon="@mipmap/ic_launcher"        android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <service android:name=".MyLonginService"            android:exported="true"></service>    </application></manifest>

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