Android AccessibilityService使用注意

AccessibilityService简介

简介

AccessibilityService是一个辅助类，可以监听我们手机的焦点，窗口变化，按钮点击等等。实现它的服务需要在手机设置里面->辅助功能在这里面找到你自己实现的辅助类，然后打开它就可以进行我们一系列的监听了。还可以对监听的对象进行一些脚本的操作。

配置

Manifest.xml配置

新建一个类继承AccessibilityService，并在AndroidManifest文件里注册它，加入对应的Intent-filter，表明是一个辅助服务,同时加入相应的权限.

<application><service android:name=".MyAccessibilityService" android:label="@string/accessibility_service_label"><intent-filter><action android:name="android.accessibilityservice.AccessibilityService" /></intent-filter></service><uses-permission android:name="android.permission.BIND_ACCESSIBILITY_SERVICE" />
</application>

配置辅助服务

在代码中配置

一般在onServiceConnected()方法里进行

    private void setServiceInfo(int feedbackType) {AccessibilityServiceInfo info = new AccessibilityServiceInfo();// We are interested in all types of accessibility events.info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK;// We want to provide specific type of feedback.info.feedbackType = feedbackType;// We want to receive events in a certain interval.info.notificationTimeout = EVENT_NOTIFICATION_TIMEOUT_MILLIS;// We want to receive accessibility events only from certain packages.info.packageNames = PACKAGE_NAMES;setServiceInfo(info);}

在xml文件中配置

从Android4.0开始，开发者可以通过在AndroidManifest里添加标签

<service android:name=".MyAccessibilityService">...<meta-dataandroid:name="android.accessibilityservice"android:resource="@xml/accessibility_service_config" />
</service>

配置实现类

子类MyAccessibilityService继承AccessibilityService，并实现相应的重载方法：

实操

onAccessibilityEvent（）中对事件进行监听筛选

    public void onAccessibilityEvent(AccessibilityEvent event) {int eventType = event.getEventType();switch (eventType) {case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:  //收到通知栏消息break;case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:    //界面状态改变break;case  AccessibilityEvent.TYPE_VIEW_CLICKED:   //点击事件break;case AccessibilityEvent.CONTENT_CHANGE_TYPE_TEXT: //文本改变break;//省略其他的一堆可以监听的事件}}

获取当前界面各种资源，信息

        //获取根节点AccessibilityNodeInfo rootNode = getRootInActiveWindow();//匹配Text获取节点List<AccessibilityNodeInfo> list1 = rootNode.findAccessibilityNodeInfosByText("match_text");//匹配id获取节点List<AccessibilityNodeInfo> list2 = rootNode.findAccessibilityNodeInfosByViewId("match_id");//获取子节点AccessibilityNodeInfo infoNode = rootNode.getChild(index);

执行脚本操作

                //模拟点击事件target.performAction(AccessibilityNodeInfo.ACTION_CLICK);//模拟输入内容clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);ClipData clip = ClipData.newPlainText("label", "");clipboard.setPrimaryClip(clip);target.performAction(AccessibilityNodeInfo.ACTION_PASTE);

模拟Home,Back键

        //后退键performGlobalAction(AccessibilityService.GLOBAL_ACTION_BACK);//Home键performGlobalAction(AccessibilityService.GLOBAL_ACTION_HOME);//模拟左滑performGlobalAction(AccessibilityService.GESTURE_SWIPE_LEFT);

抢红包思路

1.监听微信应用发出的Notification，检查字段是否有“微信红包”字段；

2.点击Notification，进入微信界面

3.调用getRootInActiveWindow()获取根节点;

4.调用findAccessibilityNodeInfosByText(“领取红包”),获取该节点

5.调用performAction(AccessibilityNodeInfo.ACTION_CLICK)实现模拟点击

坑点

1.包被混淆，之前通过Android Device Monitor查看ID，然后根据findAccessibilityNodeInfosByID()去匹配节点，包被混淆之后每个版本不一样

2.很难找出没有文本的控件，如EditText，ImageView

    private void findEditText(AccessibilityNodeInfo root) {if (root.getClassName().equals("android.widget.EditText")) {target = root;} else {for (int i = 0; i < root.getChildCount(); i++) {if (root.getChildCount() != 0) {findEditText(root.getChild(i));}}}}

3.锁屏抢红包要解除锁屏，isKeyguardLocked()方法错误理解。刚开始写代码的时候默认检测是否有锁屏，如果锁屏了调用disableKeyguard（），解锁，然后再检测是否真正解锁，成功解锁之后再进行抢红包的逻辑。后面发现disableKeyguard（）并不是真正能够解锁，只是隐藏了锁屏。

                           km = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);//得到锁管理器对象boolean flag = km.isKeyguardLocked();isFromNotification = true;if (flag == true) {kl = km.newKeyguardLock("unLock");kl.disableKeyguard();}gotoWeCharUI(event);

官方对disableKeyguard（）解释： 
* Disable the keyguard from showing. If the keyguard is currently 
* showing, hide it. The keyguard will be prevented from showing again 
* until {@link #reenableKeyguard()} is called.