Android通过AIDL实现跨进程更新UI

2019-11-09 15:16:46

字体：大中小

来源：转载

供稿：网友

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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