Android通過AIDL實現跨程序更新UI
阿新 • • 發佈:2019-01-09
一、概述
本篇文章將和大家一起來學習AIDL實現跨程序更新UI。
需求是:在同一個應用中有兩個Activity,MainActivity和TempActivity,這兩個Activity不在同一個程序中。
現在需要通過TempActivity來改變MainActivity中的檢視,即修改MainActivity中TextView的顯示內容並且新增兩個Button,也就是實現跨程序更新UI這麼一個功能。
對於這種跨程序更新UI的需求我們可以通過AIDL或者BroadcastReceiver的方式實現,而本篇文章主要通過AIDL的方式實現,如果你對AIDL
還不熟悉的話可以先看看我的這篇文章: Android AIDL入門篇
二、實現效果圖
在MainActivity裡點選“跳轉到新程序ACTIVITY”按鈕,會啟動一個新程序的TempActivity,我們先點選“繫結服務”,這樣我們就啟動了服務,再點選“AIDL更新”按鈕,通過呼叫handler來實現跨程序更新UI,點選返回,我們發現MainActivity頁面中的TextView內容已經更新了,並且新添加了兩個按鈕。
三、核心程式碼
IViewManager.aidl
裡面提供了兩個方法,一個是根據id更新TextView裡面的內容,一個是根據id新增view檢視
// IViewManager.aidl
package com.czhappy.remoteviewdemo;
// Declare any non-default types here with import statements
interface IViewManager {
void setTextViewText(in int id,in String text);//設定TextView的內容
void addView(in int layoutId); //新增View檢視
}
rebuild project讓IDE工具自己生成AIDL介面對應的java檔案。
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() {
}
/**
* 當客戶端繫結到該服務時呼叫
* @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的內容
Bundle bundle = msg.getData();
TextView textView = (TextView) mLinearLayout.findViewById(bundle.getInt("id"));
textView.setText(bundle.getString("text"));
break;
case 3: //在MainActivity中新增View檢視
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);
}
/**
* 繫結服務
*/
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,"通過AIDL跨程序修改TextView內容");
viewsManager.addView(R.layout.button_layout);
} catch (RemoteException e) {
e.printStackTrace();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if(isBind){
unbindService(viewServiceConnection);
isBind = false;
}
}
}
配置檔案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、原始碼下載