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我尝试在打开新活动或窗口时使用辅助功能服务来处理事件。但它不起作用。如何通过TYPE_WINDOW_STATE_CHANGED使用辅助功能服务
**首先,我实现无障碍服务类的样子:
public class DemoAccessibilityService extends AccessibilityService {
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
System.out.println(" DemoAccessibilityService change= " + event.getAction());
}
@Override
public void onInterrupt() {
}
@Override
protected void onServiceConnected() {
System.out.println("DemoAccessibilityService connected");
super.onServiceConnected();
AccessibilityServiceInfo config = new AccessibilityServiceInfo();
config.eventTypes = AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED;
config.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
if (Build.VERSION.SDK_INT >= 16)
config.flags = AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS;
setServiceInfo(config);
}
@Override
public void onDestroy() {
System.out.println("DemoAccessibilityService destroy");
super.onDestroy();
}
}
有2个选项来配置服务:(1)使用.xml文件,或(2)配置dinamically在源代码上。我有demo_accessibility.xml配置文件:
<accessibility-service
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:accessibilityEventTypes="typeWindowStateChanged"
android:accessibilityFeedbackType="feedbackGeneric"
android:accessibilityFlags="flagIncludeNotImportantViews"
tools:ignore="UnusedAttribute"
android:packageNames="com.android.systemui"
/>
**。然后,我宣布它在AndroidManifest.xml这样的:
<service android:name="demo.android.accessibility.DemoAccessibilityService"
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/demo_accessibility"/>
</service>
建设中的设备后,我进入“设置”并打开“辅助功能”类别。 但它不起作用!我该怎么办?