用AccessibilityService实现自动清理近期任务列表(Recent)功能

目前在写Android端微信全自动化的项目，业务逻辑上需要定期清理Recent列表杀死微信，来实现对应用的运行环境的初始化，决定用AccessibilityService来实现。

实现如下——

配置文件

<?xml version="1.0" encoding="UTF-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
android:accessibilityEventTypes="typeWindowStateChanged"
android:accessibilityFeedbackType="feedbackGeneric"
android:accessibilityFlags="flagDefault"
android:canRetrieveWindowContent="true"
android:notificationTimeout="100"
android:description="@string/accessibility_description"
android:packageNames="com.tencent.mm,com.android.systemui" />

实现服务

执行逻辑：如果监听触发，则先按home键回到桌面，然后按recent（menu）键显示最近任务列表，然后找到清理按钮、点击清理按钮。

package com.sk.androidauto.service;

import java.util.List;

import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.os.SystemClock;
import android.util.Log;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;

public class MyAccessibilityService extends AccessibilityService {

private static final String TAG = "MyAccessibilityService";
private static final int SLEEPTIME = 2000;

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
//此处写事件的处理，常用eventType和className来做判断。
int eventType = event.getEventType();
String className = event.getClassName().toString();
Log.d(TAG, "当前事件类型：" + eventType);
Log.d(TAG, "当前执行类名：" + className);
//根据不同的eventType和className，来进行具体的事件处理
switch (eventType) {
case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
monitor();
break;
}

}

@Override
public void onInterrupt() {

}

@Override
protected void onServiceConnected() {
super.onServiceConnected();
}

/**
* 系统桌面，点击菜单键时候，弹出的清理按键id
*/
private static final String systemuiClearBtnId = "com.android.systemui:id/clearButton";
/**
* 点击系统菜单键，清理运存
*/
private void clearMemory() {
SystemClock.sleep(SLEEPTIME);
AccessibilityNodeInfo nodeInfo = getRootInActiveWindow();
if (nodeInfo != null) {
List<AccessibilityNodeInfo> infos = nodeInfo.findAccessibilityNodeInfosByViewId(systemuiClearBtnId);
if (infos != null && infos.size() > 0) {
AccessibilityNodeInfo clearBtn = infos.get(0);
clearBtn.performAction(AccessibilityNodeInfo.ACTION_CLICK);
}
nodeInfo.recycle();
}
}

public void monitor() {
SystemClock.sleep(SLEEPTIME);
performGlobalAction(AccessibilityService.GLOBAL_ACTION_HOME);
SystemClock.sleep(SLEEPTIME);
performGlobalAction(AccessibilityService.GLOBAL_ACTION_RECENTS);
clearMemory();
}
}

注册服务

<service
android:name="com.sk.androidauto.service.MyAccessibilityService"
android:enabled="true"
android:exported="true"
android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE" >
<intent-filter>
<action android:name="android.accessibilityservice.AccessibilityService" />
</intent-filter>

<meta-data
android:name="android.accessibilityservice"
android:resource="@xml/accessibility_systemui" />
</service>

触发监听

public void accessibilityserviceClear(View view) {
if (!AccessibilityServiceUtil.isAccessibilitySettingsOn(this, MyAccessibilityService.class)) {
Intent intent = new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS);
startActivity(intent);
} else {
//调起微信，触发AccessibilityService对微信的监听
callWX();
}
}

很简单的一个小功能，没有使用过AccessibilityService的可以参考下：‘

Android自动化之AccessibilityService模拟操作（快速集成）和

Android自动化之AccessibilityService模拟操作（经验总结）