Demo地址：https://github.com/qyxxjd/ClearProcesses

AccessibilityService

1.简介

public abstract class AccessibilityService extends Service

java.lang.Object
 ↳ android.content.Context
   ↳ android.content.ContextWrapper
     ↳ android.app.Service
       ↳ android.accessibilityservice.AccessibilityService

无障碍服务旨在帮助身心有障碍的用户使用Android设备和应用。无障碍服务在后台运行，当无障碍事件被激活时系统会执行AccessibilityService的onAccessibilityEvent(AccessibilityEvent event)方法。这些事件表示在用户界面中的一些状态的改变，例如：焦点的改变、按钮被点击等。这类服务可以有选择性地请求查询活动窗口的内容。无障碍服务的开发需要继承AccessibilityService和实现它的抽象方法。

2.使用

public class YourService extends AccessibilityService {
    @Override public void onAccessibilityEvent(final AccessibilityEvent event) {
        //TODO ...
    }
    @Override public void onInterrupt() { 
        //TODO ...
    }
}

在onAccessibilityEvent方法中，通过AccessibilityEvent的getSource方法获取AccessibilityNodeInfoUI节点信息

AccessibilityNodeInfo nodeInfo = event.getSource();

通过AccessibilityNodeInfo的findAccessibilityNodeInfosByText 、
findAccessibilityNodeInfosByViewId方法获取你感兴趣的UI子节点信息

List<AccessibilityNodeInfo> nodeInfoList = event.getSource().findAccessibilityNodeInfosByText("强行停止");

通过AccessibilityNodeInfo的performAction方法来模拟用户点击事件

nodeInfo.performAction(AccessibilityNodeInfo.ACTION_CLICK);

使用AccessibilityService之前需要判断一下当前是否已经授权

private boolean checkEnabledAccessibilityService() {
    List<AccessibilityServiceInfo> accessibilityServices =
            mAccessibilityManager.getEnabledAccessibilityServiceList(AccessibilityServiceInfo.FEEDBACK_GENERIC);
    for (AccessibilityServiceInfo info : accessibilityServices) {
        if (info.getId().equals(SERVICE_NAME)) {
            return true;
        }
    }
    return false;
}

如果没有授权，需要到系统设置页面进行设置

Intent intent = new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS);
startActivity(intent);

3.属性配置

在资源文件res目录下新建一个xml文件夹,创建AccessibilityService配置文件your_config.xml

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:description="@string/app_name"
    android:accessibilityEventTypes="typeWindowStateChanged|typeWindowContentChanged"
    android:packageNames="com.android.settings"
    android:accessibilityFeedbackType="feedbackAllMask"
    android:notificationTimeout="500"
    android:accessibilityFlags="flagDefault"
    android:canRetrieveWindowContent="true"
    />

更多属性介绍请参考：AccessibilityServiceInfo

4.AndroidManifest配置

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    ... >

    <application ...>
        ...
        <service
            android:name=".YourService"
            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"> <-- 需要用到BIND_ACCESSIBILITY_SERVICE这个权限 -->
            <intent-filter>
                <-- 有了这个action，用户才能在设置里面看到我们的服务 -->
                <action android:name="android.accessibilityservice.AccessibilityService"/>
            </intent-filter>
            <meta-data
                android:name="android.accessibilityservice"
                android:resource="@xml/your_config"/>
        </service>
    ...
    </application>

</manifest>

清理后台进程

1.获取后台进程

通过ActivityManager的getRunningAppProcesses和getRunningServices方法获取后台运行的应用程序、服务列表

ActivityManager mActivityManager = (ActivityManager) mAppContext.getSystemService(Context.ACTIVITY_SERVICE);
//返回在设备上运行的应用程序的进程的列表
List<ActivityManager.RunningAppProcessInfo> appProcessInfos = mActivityManager.getRunningAppProcesses();
//返回当前正在运行的服务的列表
List<ActivityManager.RunningServiceInfo> serviceInfos = mActivityManager.getRunningServices(yourCount);

2.进入应用程序详情页面

private void showPackageDetail(String packageName){
    Intent intent = new Intent();
    intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
    Uri uri = Uri.fromParts(PACKAGE, packageName, null);
    intent.setData(uri);
    startActivity(intent);
}

3.模拟强行停止操作

@TargetApi(Build.VERSION_CODES.JELLY_BEAN) @Override public void onAccessibilityEvent(final AccessibilityEvent event) {
    if(null == event || null == event.getSource()) { return; }
    if(event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED &&
            event.getPackageName().equals(PACKAGE)){
        final CharSequence className = event.getClassName();
        if(className.equals(NAME_APP_DETAILS)){ //模拟点击强行停止按钮
            simulationClick(event, TEXT_FORCE_STOP);
            performGlobalAction(GLOBAL_ACTION_BACK);
        }
        if(className.equals(NAME_ALERT_DIALOG)){ //模拟点击弹窗的确认按钮
            simulationClick(event, TEXT_DETERMINE);
            performGlobalAction(GLOBAL_ACTION_BACK);
        }
    }
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN) private void simulationClick(AccessibilityEvent event, String text){
    List<AccessibilityNodeInfo> nodeInfoList = event.getSource().findAccessibilityNodeInfosByText(text);
    for (AccessibilityNodeInfo node : nodeInfoList) {
        if (node.isClickable() && node.isEnabled()) {
            node.performAction(AccessibilityNodeInfo.ACTION_CLICK);
        }
    }
}