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。
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);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"
/>| 属性名称 | 属性简介 |
|---|---|
android:accessibilityEventTypes |
指定我们在监听窗口中可以模拟哪些事件 |
android:accessibilityFeedbackType |
指定无障碍服务的反馈方式 |
android:accessibilityFlags |
指定额外的标志 |
android:canRetrieveWindowContent |
指定是否允许我们的程序读取窗口中的节点和内容 |
android:description |
系统设置无障碍页面显示的选项名称 |
android:notificationTimeout |
两个相同类型事件发送的时间间隔，单位毫秒 |
android:packageNames |
指定监听的应用程序包名，多个以,隔开 |
| 更多属性介绍请参考：AccessibilityServiceInfo |
<?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>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);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);
}@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);
}
}
}- Blog: http://blog.csdn.net/qy1387
- Email: pgliubin@gmail.com
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