Android通过AIDL实现跨进程更新UI

来源：互联网发布：图片颜色分析软件编辑：程序博客网时间：2024/06/06 07:42

一、概述

本篇文章将和大家一起来学习AIDL实现跨进程更新UI。
需求是：在同一个应用中有两个Activity，MainActivity和TempActivity，这两个Activity不在同一个进程中。

这里写图片描述

现在需要通过TempActivity来改变MainActivity中的视图，即修改MainActivity中TextView的显示内容并且添加两个Button，也就是实现跨进程更新UI这么一个功能。

对于这种跨进程更新UI的需求我们可以通过AIDL或者BroadcastReceiver的方式实现，而本篇文章主要通过AIDL的方式实现，如果你对AIDL
还不熟悉的话可以先看看我的这篇文章：Android AIDL入门篇

二、实现效果图

在MainActivity里点击“跳转到新进程ACTIVITY”按钮，会启动一个新进程的TempActivity，我们先点击“绑定服务”，这样我们就启动了服务，再点击“AIDL更新”按钮，通过调用handler来实现跨进程更新UI，点击返回，我们发现MainActivity页面中的TextView内容已经更新了，并且新添加了两个按钮。
这里写图片描述

三、核心代码

IViewManager.aidl
里面提供了两个方法，一个是根据id更新TextView里面的内容，一个是根据id添加view视图

// IViewManager.aidlpackage com.czhappy.remoteviewdemo;// Declare any non-default types here with import statementsinterface IViewManager {    void setTextViewText(in int id,in String text);//设置TextView的内容    void addView(in int layoutId);                 //添加View视图}

rebuild project让IDE工具自己生成AIDL接口对应的java文件。

ViewAIDLService.java

package com.czhappy.remoteviewdemo.service;import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.Bundle;import android.os.IBinder;import android.os.Message;import android.os.RemoteException;import android.util.Log;import com.czhappy.remoteviewdemo.IViewManager;import com.czhappy.remoteviewdemo.activity.MainActivity;/** * Description: * User: chenzheng * Date: 2017/2/9 0009 * Time: 16:00 */public class ViewAIDLService extends Service {    private static final String TAG = "ViewAIDLService";    private Binder viewManager = new IViewManager.Stub(){        @Override        public void setTextViewText(int id, String text) throws RemoteException {            Message message = new Message();            message.what = 2;            Bundle bundle = new Bundle();            bundle.putInt("id",id);            bundle.putString("text",text);            message.setData(bundle);            new MainActivity.MyHandler(ViewAIDLService.this,getMainLooper()).sendMessage(message);        }        @Override        public void addView(int layoutId) throws RemoteException {            Message message = new Message();            message.what = 3;            Bundle bundle = new Bundle();            bundle.putInt("layoutId",layoutId);            message.setData(bundle);            Log.i(TAG,"thread name = "+Thread.currentThread().getName());            new MainActivity.MyHandler(ViewAIDLService.this,getMainLooper()).sendMessage(message);        }    };    public ViewAIDLService() {    }    /**     * 当客户端绑定到该服务时调用     * @param intent     * @return     */    @Override    public IBinder onBind(Intent intent) {        return viewManager;    }}

MainActivity.java

package com.czhappy.remoteviewdemo.activity;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Looper;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.LinearLayout;import android.widget.RemoteViews;import android.widget.TextView;import com.czhappy.remoteviewdemo.R;import java.lang.ref.WeakReference;public class MainActivity extends AppCompatActivity {    private static String TAG = "MainActivity";    private static LinearLayout mLinearLayout;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mLinearLayout = (LinearLayout) this.findViewById(R.id.mylayout);    }    public static class MyHandler extends Handler {        WeakReference<Context> weakReference;        public MyHandler(Context context, Looper looper) {            super(looper);            weakReference = new WeakReference<>(context);        }        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            Log.i(TAG, "handleMessage");            switch (msg.what) {                case 2: //修改MainActivity中TextView的内容                    Bundle bundle = msg.getData();                    TextView textView = (TextView) mLinearLayout.findViewById(bundle.getInt("id"));                    textView.setText(bundle.getString("text"));                    break;                case 3: //在MainActivity中添加View视图                    LayoutInflater inflater = LayoutInflater.from(weakReference.get());                    View view = inflater.inflate(msg.getData().getInt("layoutId"),null);                    mLinearLayout.addView(view);                default:                    break;            }        }    };    public void readyGo(View view){        Intent intent = new Intent(MainActivity.this, TempActivity.class);        startActivity(intent);    }}

TempActivity.java

package com.czhappy.remoteviewdemo.activity;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.os.RemoteException;import android.support.annotation.Nullable;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import com.czhappy.remoteviewdemo.IViewManager;import com.czhappy.remoteviewdemo.R;import com.czhappy.remoteviewdemo.service.ViewAIDLService;/** * Description: * User: chenzheng * Date: 2017/2/9 0009 * Time: 16:05 */public class TempActivity extends AppCompatActivity {    private String TAG = "TempActivity";    private IViewManager viewsManager;    private boolean isBind = false;    private ServiceConnection viewServiceConnection = new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            Log.e(TAG,"onServiceConnected");            viewsManager = IViewManager.Stub.asInterface(service);        }        @Override        public void onServiceDisconnected(ComponentName name) {            //回收            viewsManager = null;        }    };    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        this.setContentView(R.layout.activity_temp);    }    /**     * 绑定服务     */    public void bindService(View view) {        Intent viewServiceIntent = new Intent(this,ViewAIDLService.class);        isBind = bindService(viewServiceIntent,viewServiceConnection, Context.BIND_AUTO_CREATE);    }    /**     * 更新UI     */    public void UpdateUI(View view){        try {            viewsManager.setTextViewText(R.id.mytext,"通过AIDL跨进程修改TextView内容");            viewsManager.addView(R.layout.button_layout);        } catch (RemoteException e) {            e.printStackTrace();        }    }    @Override    protected void onDestroy() {        super.onDestroy();        if(isBind){            unbindService(viewServiceConnection);            isBind = false;        }    }}

配置文件AndroidManifest.xml

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

四、源码下载

http://download.csdn.net/detail/chenzheng8975/9751471

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