AccessibilityService不返回视图ID

Question

我正在Android中编写一个可访问性服务,它依赖于获取当前所选视图的视图ID,但是在某些设备上(Nexus 6P 6.0.1,三星Galaxy S6 edge + 5 + 6.0.1)我没有查看id和在其他人(HTC One M8 5.0.1)它通过罚款.因为它在某些设备上工作正常,我确信我的代码没有问题,但是我在下面发布了一个最小的测试用例.

任何人都可以帮助我在所有设备上获取服务报告ID吗？

A11y服务

public class ViewIdLoggingAccessibilityService extends AccessibilityService {
  @Override
  public void onAccessibilityEvent(AccessibilityEvent event) {
      AccessibilityNodeInfo source = event.getSource();
      if (source == null) {
          Log.d("onAccessibilityEvent", "source was null for: " + event);
      } else {
          String viewIdResourceName = source.getViewIdResourceName();
          Log.d("onAccessibilityEvent", "viewid: " + viewIdResourceName);
      }
  }

  @Override
  public void onInterrupt() {
      Log.d("!# onInterrupt", "called");
  }
}

AndroidManifest.xml

<manifest package="com.example.a11yservice"
          xmlns:android="http://schemas.android.com/apk/res/android"
    >

  <application
      android:allowBackup="true"
      android:icon="@drawable/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme"
      >

    <service
        android:name=".ViewIdLoggingAccessibilityService"
        android:label="@string/view_id_logging_service_label"
        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/serviceconfig"
          />
    </service>

  </application>

</manifest>

serviceconfig.xml

<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
    android:accessibilityEventTypes="typeViewClicked|typeViewFocused"
    android:accessibilityFeedbackType="feedbackGeneric"
    android:accessibilityFlags="flagReportViewIds"
    android:canRetrieveWindowContent="true"
    android:notificationTimeout="100" />

Answer 1

它已知问题,并且不久前被发布到AOSP问题跟踪器.您可以在此处检查问题状态:" 辅助功能问题:flagReportViewIds对Android M中的实际设备没有影响 ".

不幸的是,即使在最新的Android 7.0上也存在问题但我找到了简单的解决方 您可以调用object上的refresh()方法AccessibilityNodeInfo来刷新它并收集包括id在内的所有遗漏数据.

像这样的东西:

public void onAccessibilityEvent(AccessibilityEvent event) {
    AccessibilityNodeInfo ani = event.getSource();
    if (ani != null) {
        ani.refresh(); // to fix issue with viewIdResName = null on Android 6+
    }
}