Android 中未调用 onAccessibityEvent

Question

我试图获取一些有关辅助功能事件的教程。我找到了一个辅助功能教程。这很好，我在 eclipse 中实现了 & 运行在我的平板电脑 5.1.1 中，nexus。

编码。

MyAccessibilityService.java

    public class MyAccessibilityService extends AccessibilityService {
        public static final String TAG = "volumeMaster";
        @Override
        public void onAccessibilityEvent(AccessibilityEvent event)
        {
            Log.v(TAG, "***** onAccessibilityEvent");
            Toast.makeText(getApplicationContext(), "Got event from: " + event.getPackageName(), Toast.LENGTH_LONG).show();
            String s=String.valueOf(event.getEventType());
            Toast.makeText(MyAccessibilityService.this, s, Toast.LENGTH_LONG).show();
            Toast.makeText(MyAccessibilityService.this, getEventText(event), Toast.LENGTH_LONG).show();
            Log.v(TAG, String.format(
                    "onAccessibilityEvent: [type] %s [class] %s [package] %s [time] %s [text] %s",
                    getEventType(event), event.getClassName(), event.getPackageName(),
                    event.getEventTime(), getEventText(event)));
        }   `
        private String getEventType(AccessibilityEvent event) {
            switch (event.getEventType()) {
                case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:
                    return "TYPE_NOTIFICATION_STATE_CHANGED";
                case AccessibilityEvent.TYPE_VIEW_CLICKED:
                    return "TYPE_VIEW_CLICKED";
                case AccessibilityEvent.TYPE_VIEW_FOCUSED:
                    return "TYPE_VIEW_FOCUSED";
                case AccessibilityEvent.TYPE_VIEW_LONG_CLICKED:
                    return "TYPE_VIEW_LONG_CLICKED";
                case AccessibilityEvent.TYPE_VIEW_SELECTED:
                    return "TYPE_VIEW_SELECTED";
                case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
                    return "TYPE_WINDOW_STATE_CHANGED";
                case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:
                    return "TYPE_VIEW_TEXT_CHANGED";
            }
            return "default";
        }
        private String getEventText(AccessibilityEvent event) {
            StringBuilder sb = new StringBuilder();
            for (CharSequence s : event.getText()) {
                sb.append(s);
            }
            return sb.toString();
           }
        @Override
        public void onInterrupt()
        {
            Log.v(TAG, "***** onInterrupt");
        }
        @Override
        public void onServiceConnected()
        {
            Log.v(TAG, "***** onServiceConnected");      
            AccessibilityServiceInfo info = new AccessibilityServiceInfo();
            info.eventTypes =   AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED;
            info.notificationTimeout = 100;
            info.feedbackType = AccessibilityEvent.TYPES_ALL_MASK;
            setServiceInfo(info);
        }

}

在此代码中，如果我删除 getEventType 和 getEventtext 函数，它会将事件类型显示为 64。如果我添加这两个功能，我将无法获得事件操作。我尝试了几次，然后打开我的应用程序以在辅助功能点击中收听事件。

我的清单文件如下 Androidmanifest.xml

     <application
            android:icon="@drawable/ic_launcher"
            android:label="@string/app_name" 
            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
            <service android:name=".MyAccessibilityService" android:label="@string/app_name" android:enabled="true" android:exported="false">
            <intent-filter>
                <action android:name="android.accessibilityservice.AccessibilityService" />
            </intent-filter>
             <meta-data
        android:name="android.accessibilityservice"
        android:resource="@xml/accessibility" />
         </service>
            <activity
                android:name=".Toast2Activity"
                android:label="@string/app_name" >
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />

                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
            </activity>
        </application>

谁能帮我找出我在这段代码中的缺陷。提前致谢。

Answer 1

几天前刚在 Android 4.4 和 5.0 上试过，效果很好。如果您已经在 config-xml("@xml/accessibility") 中定义了所有内容，则无需在 onServiceConnected() 中设置 AccessibilityServiceInfo。而在AndroidManifest.xml你在Application里设置了“android:permission”，不知道行不行

public class MyAccessibilitySvc extends AccessibilityService {
    private static final String TAG = "MyAccessibilitySvc";

    @Override
    protected void onServiceConnected() {
        super.onServiceConnected();
    }

    @Override
    public void onAccessibilityEvent(AccessibilityEvent event) {
        AccessibilityNodeInfo nodeInfo = event.getSource();
        if (null == nodeInfo) return;
        Log.i(TAG, "onAccessibilityEvent: event=" + event);
    }

    @Override
    public void onInterrupt() {

    }
}

在AndroidManifest.xml中：

    <service android:name=".MyAccessibilitySvc"
        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/accessibilitysvc_config"/>
    </service>

xml 配置：

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
    android:accessibilityEventTypes="typeViewFocused|typeViewClicked"
    android:accessibilityFeedbackType="feedbackAllMask"
    android:notificationTimeout="100"
    android:canRetrieveWindowContent="true"
    />

Android 中未调用 onAccessibityEvent

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