Android AccessibilityService 使用详解

转转请注明出处:http://blog.csdn.net/u011510784/article/details/50716869

利用Android辅助工具类AccessibilityService可以获取手机当前页面的信息,用户的操作事件等等.

首先新建一个类继承AccessibilityService:

<span style="font-family:Times New Roman;font-size:14px;">public class MyAccessibilityService extends AccessibilityService {
	private final String TAG = "MyAccessibilityService";

	@Override
	public void onAccessibilityEvent(AccessibilityEvent event) {
		int eventType = event.getEventType();
		String eventTypeName = "";
		switch (eventType) {
		case AccessibilityEvent.TYPE_VIEW_CLICKED:
			eventTypeName = "TYPE_VIEW_CLICKED";
			break;
		case AccessibilityEvent.TYPE_VIEW_FOCUSED:
			eventTypeName = "TYPE_VIEW_FOCUSED";
			break;
		case AccessibilityEvent.TYPE_VIEW_LONG_CLICKED:
			eventTypeName = "TYPE_VIEW_LONG_CLICKED";
			break;
		case AccessibilityEvent.TYPE_VIEW_SELECTED:
			eventTypeName = "TYPE_VIEW_SELECTED";
			break;
		case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:
			eventTypeName = "TYPE_VIEW_TEXT_CHANGED";
			break;
		case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
			eventTypeName = "TYPE_WINDOW_STATE_CHANGED";
			break;
		case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:
			eventTypeName = "TYPE_NOTIFICATION_STATE_CHANGED";
			break;
		case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END:
			eventTypeName = "TYPE_TOUCH_EXPLORATION_GESTURE_END";
			break;
		case AccessibilityEvent.TYPE_ANNOUNCEMENT:
			eventTypeName = "TYPE_ANNOUNCEMENT";
			break;
		case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START:
			eventTypeName = "TYPE_TOUCH_EXPLORATION_GESTURE_START";
			break;
		case AccessibilityEvent.TYPE_VIEW_HOVER_ENTER:
			eventTypeName = "TYPE_VIEW_HOVER_ENTER";
			break;
		case AccessibilityEvent.TYPE_VIEW_HOVER_EXIT:
			eventTypeName = "TYPE_VIEW_HOVER_EXIT";
			break;
		case AccessibilityEvent.TYPE_VIEW_SCROLLED:
			eventTypeName = "TYPE_VIEW_SCROLLED";
			break;
		case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED:
			eventTypeName = "TYPE_VIEW_TEXT_SELECTION_CHANGED";
			break;
		case AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED:
			eventTypeName = "TYPE_WINDOW_CONTENT_CHANGED";
			break;
		}
		Log.i(TAG, "eventType:" + eventType);
		Log.i(TAG, "eventTypeName:" + eventTypeName);
	}

	@Override
	public void onInterrupt() {
		// TODO Auto-generated method stub

	}
}</span>

然后新建一个xml配置文件来配置我们的MyAccessibility类:

accessibilityservice.xml :

<span style="font-family:Times New Roman;font-size:14px;"><?xml version="1.0" encoding="utf-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
    android:accessibilityEventTypes="typeAllMask"
    android:accessibilityFeedbackType="feedbackGeneric"
    android:accessibilityFlags="flagDefault"
    android:canRetrieveWindowContent="true"
    android:description="@string/app_name"
    android:settingsActivity="com.example.xxx.android.accessibility.ServiceSettingsActivity" /></span>

android:accessibilityEventTypes="typeAllMask",相应所有的事件,就是MyAccessibility类中swich中的那些事件.

android:accessibilityFeedbackType="feedbackGeneric",手机用什么方式将信息反馈给用户,语音震动等等,这里默认;

android:canRetrieveWindowContent="true",允许获取手机页面中的信息

android:settingsActivity中com.example.xxx是你的应用的包名

然后将这个xml配置文件配置到项目中:

<span style="font-family:Times New Roman;font-size:14px;">        <service
            android:name="com.example.xxx.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/accessibilityservice" />
        </service></span>

然后在我们手机的设置中的辅助功能里,打开这个辅助服务就可以了.

利用这个类我们可以获取当前手机页面的信息,包括控件ID,控件值;当前类的名称以及用户的一些操作和手机状态的变化. 所以利用这些可以做手机自动安装软件,模拟点击,手机自动滑屏等.

public void onAccessibilityEvent(AccessibilityEvent event){}

通过这个event我们可以得到:

 event.getEventType()-当前事件的类型;  event.getClassName()-当前类的名称;  event.getSource()-当前页面中的节点信息,等等. 更详细信查看官方API

遍历获取窗口中所有的节点信息也可以用这个方法:

<span style="font-family:Times New Roman;font-size:14px;">public void getInfo() {
		AccessibilityNodeInfo info = getRootInActiveWindow();
		if (info != null) {
			if (info.getChildCount() == 0) {
				Log.i(TAG, "控件名称:" + info.getClassName());
				Log.i(TAG, "控件中的值：" + info.getText());
				Log.i(TAG, "控件的ID:" + info.getViewIdResourceName());
				Log.i(TAG, "点击是否出现弹窗:" + info.canOpenPopup());
			} else {
				for (int i = 0; i < info.getChildCount(); i++) {
					if (info.getChild(i) != null) {
						recycle(info.getChild(i));
					}
				}
			}
		}
	}</span>

不过这个方法对当前的SDK版本有一定的要求,需要API level 19及以上.