Android 可访问性服务可以'；无法接收onKeyEvent或OnGeture

我是一名中国学生，正在做安卓安全方面的研究。（我的句子中可能有一些语法错误）我想使用易访问性API来捕获用户的行为，例如点击输入法键盘和选择某些字符。。但是当我尝试这个API时，我只能获取当前窗口的文本和用户执行的操作，而不是从键盘获取任何事件。也许我错过了什么。 （我无法从onKeyEvent和OnTesture接收任何事件。但我可以从onAccessibilityEvent接收事件。）

我已经创建了以下基本的辅助功能服务

package com.jack.accessibility;

import java.util.List;

import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.annotation.SuppressLint;
import android.util.Log;
import android.view.KeyEvent;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;

@SuppressLint("NewApi")
public class MyAccessibilityService extends AccessibilityService {
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
    String eventText = getTypeName(event.getEventType()) + "===="
            + event.getContentDescription();
    Log.e("------------------------", "-------------------------");
    Log.d("PackageName", event.getPackageName().toString());
    Log.d("EventName", eventText);
    traverseNode(getRootInActiveWindow());
    Log.e("------------------------", "-------------------------");
}

@Override
public void onServiceConnected() {
    Log.e("---------ServiceConnected--------------",
            "------------ServiceConnected------------");
    AccessibilityServiceInfo info = new AccessibilityServiceInfo();
    info.packageNames = new String[] { "com.android.mms" };
    info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK;
    info.notificationTimeout = 100;
    info.feedbackType = AccessibilityServiceInfo.FEEDBACK_SPOKEN;
    info.flags = AccessibilityServiceInfo.FLAG_REQUEST_FILTER_KEY_EVENTS;
    setServiceInfo(info);
}

@Override
public boolean onKeyEvent(KeyEvent event) {
    Log.i("Key", ".....");
    return true;
}

@Override
public boolean onGesture(int gestureId) {
    Log.v("THEIA", String.format("onGesture: [type] %s", gIdToString(gestureId)));
    return false;
}

@Override
public void onInterrupt() {
    Log.e("---------Interrupt--------------",
            "------------Interrupt------------");
}

private void traverseNode(AccessibilityNodeInfo node) {
    if (null == node)
        return;

    final int count = node.getChildCount();
    if (count > 0) {
        for (int i = 0; i < count; i++) {
            AccessibilityNodeInfo childNode = node.getChild(i);
            traverseNode(childNode);
        }
    } else {
        CharSequence text = node.getText();
        Log.d("test", "Node text = " + text);
    }

}
private String getTypeName(int type) {
        switch (type) {
        case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START:
            return "TYPE_TOUCH_EXPLORATION_GESTURE_START";
        case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END:
            return "TYPE_TOUCH_EXPLORATION_GESTURE_END";
        case AccessibilityEvent.TYPE_TOUCH_INTERACTION_START:
            return "TYPE_TOUCH_INTERACTION_START";
        case AccessibilityEvent.TYPE_TOUCH_INTERACTION_END:
            return "TYPE_TOUCH_INTERACTION_END";
        case AccessibilityEvent.TYPE_GESTURE_DETECTION_START:
            return "TYPE_GESTURE_DETECTION_START";
        case AccessibilityEvent.TYPE_GESTURE_DETECTION_END:
            return "TYPE_GESTURE_DETECTION_END";
        case AccessibilityEvent.TYPE_VIEW_HOVER_ENTER:
            return "TYPE_VIEW_HOVER_ENTER";
        case AccessibilityEvent.TYPE_VIEW_HOVER_EXIT:
            return "TYPE_VIEW_HOVER_EXIT";
        case AccessibilityEvent.TYPE_VIEW_SCROLLED:
            return "TYPE_VIEW_SCROLLED";
        case AccessibilityEvent.TYPE_VIEW_CLICKED:
            return "TYPE_VIEW_CLICKED";
        case AccessibilityEvent.TYPE_VIEW_LONG_CLICKED:
            return "TYPE_VIEW_LONG_CLICKED";
        case AccessibilityEvent.TYPE_VIEW_FOCUSED:
            return "TYPE_VIEW_FOCUSED";
        case AccessibilityEvent.TYPE_VIEW_SELECTED:
            return "TYPE_VIEW_SELECTED";
        case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED:
            return "TYPE_VIEW_ACCESSIBILITY_FOCUSED";
        case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED:
            return "TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED";
        case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
            return "TYPE_WINDOW_STATE_CHANGED";
        case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:
            return "TYPE_NOTIFICATION_STATE_CHANGED";
        case AccessibilityEvent.TYPE_ANNOUNCEMENT:
            return "TYPE_ANNOUNCEMENT";
        case AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED:
            return "TYPE_WINDOW_CONTENT_CHANGED";
        case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:
            return "TYPE_VIEW_TEXT_CHANGED";
        case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED:
            return "TYPE_VIEW_TEXT_SELECTION_CHANGED";
        case AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY:
            return "TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY";
        }
        return "Unknown";
    }

private String gIdToString(int gID) {
    switch (gID) {
    case 1:
        return "GESTURE_SWIPE_UP";
    case 2:
        return "GESTURE_SWIPE_DOWN";
    case 3:
        return "GESTURE_SWIPE_LEFT";
    case 4:
        return "GESTURE_SWIPE_RIGHT";
    case 5:
        return "GESTURE_SWIPE_LEFT_AND_RIGHT";
    case 6:
        return "GESTURE_SWIPE_RIGHT_AND_LEFT";
    case 7:
        return "GESTURE_SWIPE_UP_AND_DOWN";
    case 8:
        return "GESTURE_SWIPE_DOWN_AND_UP";
    case 9:
        return "GESTURE_SWIPE_LEFT_AND_UP";
    case 10:
        return "GESTURE_SWIPE_LEFT_AND_DOWN";
    case 11:
        return "GESTURE_SWIPE_RIGHT_AND_UP";
    case 12:
        return "GESTURE_SWIPE_RIGHT_AND_DOWN";
    case 13:
        return "GESTURE_SWIPE_UP_AND_LEFT";
    case 14:
        return "GESTURE_SWIPE_UP_AND_RIGHT";
    case 15:
        return "GESTURE_SWIPE_DOWN_AND_LEFT";
    case 16:
        return "GESTURE_SWIPE_DOWN_AND_RIGHT";
    }
    return "UNKNOWN";
}
}

package com.jack.accessibility；
导入java.util.List；
导入android.accessibilityservice.accessibilityservice；
导入android.accessibilityservice.accessibilityservice信息；
导入android.annotation.SuppressLint；
导入android.util.Log；
导入android.view.KeyEvent；
导入android.view.accessibility.AccessibilityEvent；
导入android.view.accessibility.AccessibilityNodeInfo；
@SuppressLint（“新API”）
公共类MyAccessibilityService扩展了AccessibilityService{
@凌驾
AccessibilityEvent上的公共无效（AccessibilityEvent事件）{
字符串eventText=getTypeName（event.getEventType（））+“==”
+event.getContentDescription（）；
Log.e（“------------------------------------”，“------------------------------------”；
Log.d（“PackageName”，event.getPackageName（）.toString（））；
Log.d（“EventName”，eventText）；
traverseNode（getRootInActiveWindow（））；
Log.e（“------------------------------------”，“------------------------------------”；
}
@凌驾
服务连接（）上的公共无效{
Log.e（“------------ServiceConnected-----------------”，
“--------------服务连接-----------------”；
AccessibilityServiceInfo=新的AccessibilityServiceInfo（）；
info.packageNames=新字符串[]{“com.android.mms”}；
info.eventTypes=AccessibilityEvent.TYPES\u ALL\u掩码；
info.notificationTimeout=100；
info.feedbackType=可访问性服务info.FEEDBACK\u；
info.flags=AccessibilityServiceInfo.FLAG\u请求\u过滤器\u键\u事件；
设置服务信息（信息）；
}
@凌驾
公共布尔onKeyEvent（KeyEvent事件）{
Log.i（“键”和“…”）；
返回true；
}
@凌驾
公共布尔onGesture（int-gestureId）{
Log.v（“THEIA”，String.format（“onGesture:[type]%s”，gIdToString（gestureId））；
返回false；
}
@凌驾
在中断时的公共无效（）{
Log.e（“-----------中断-----------------”，
“------中断------------”；
}
私有void遍历节点（AccessibilityNodeInfo节点）{
if（null==节点）
返回；
final int count=node.getChildCount（）；
如果（计数>0）{
for（int i=0；i<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.BIND_ACCESSIBILITY_SERVICE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.jack.accessibility.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <service android:label="@string/acc_service_name" android:name=".MyAccessibilityService" 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/phone_accessibility" />
    </service>

</application>

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service android:description="@string/accessibility_service_description"
     android:accessibilityEventTypes="typeAllMask" 
     android:accessibilityFeedbackType="feedbackAllMask" 
     android:notificationTimeout="100" 
     android:canRetrieveWindowContent="true"
     android:canRequestTouchExplorationMode="true"
     android:canRequestEnhancedWebAccessibility="true"
     android:canRequestFilterKeyEvents="true"
     android:accessibilityFlags="flagDefault"
  xmlns:android="http://schemas.android.com/apk/res/android" />

info.flags = AccessibilityServiceInfo.FLAG_REQUEST_TOUCH_EXPLORATION_MODE;

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:accessibilityEventTypes="typeContextClicked|typeViewClicked"
  android:packageNames="com.example.andres.eventcapture"
  android:accessibilityFlags="flagRequestFilterKeyEvents"
  android:accessibilityFeedbackType="feedbackAllMask"
  android:notificationTimeout="50"
  android:canRetrieveWindowContent="true"
  android:settingsActivity=""
  android:canRequestFilterKeyEvents="true"
/>