我开发了一个基于无障碍服务的 Android 应用程序。但是我有一个问题，我在 Internet 上找不到任何帮助。当我在任何设备上安装应用程序时，显然它不会开始工作，直到:
问题有点复杂:
启用辅助功能服务后，我可以在辅助功能设置屏幕中看到该服务显示“已启用”。事实上，该应用程序正在运行。但是如果我进入服务，顶部和右侧有一个开关，显示为OFF。为什么？服务已启用并正常工作并且开关显示为关闭是没有意义的。
我已经尝试过使用另一种服务作为内置的 Talkback。当我打开开关时，返回辅助功能设置屏幕，然后再次进入对讲服务，开关保持打开状态。为什么它不能与我的服务正常工作？
再次，我解释说，虽然激活开关对我的服务不能正常工作，但我的应用程序确实可以工作，唯一的问题是那个开关，当我的服务已经打开时，它会混淆用户显示 OFF。
有什么原因会发生这种情况吗？也许我错过了诸如在服务启用时告诉系统之类的事情？
我的服务代码没有什么异常，与任何其他无障碍服务类似，除了我在事件发生时的自定义操作。
这是应用程序的 list XML 文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="bembibre.attractive"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.BIND_ACCESSIBILITY_SERVICE" />
<uses-permission android:name="android.permission.READ_CALENDAR" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.READ_CALL_LOG" />
<uses-permission android:name="android.permission.RECEIVE_SMS"/>
<uses-permission android:name="android.permission.READ_SMS" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="bembibre.attractive.activities.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>
<activity android:name="bembibre.attractive.activities.HelpActivity" >
</activity>
<activity android:name="bembibre.attractive.activities.NotesActivity" >
</activity>
<!-- BroadCastReceiver's -->
<receiver
android:name=".NotificationsWidget"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/widget_provider" />
</receiver>
<receiver
android:name="bembibre.attractive.events.receivers.DateChangedReceiver"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.TIMEZONE_CHANGED" />
<action android:name="android.intent.action.TIME_SET" />
</intent-filter>
</receiver>
<receiver android:name="bembibre.attractive.events.scheduling.OnAlarmReceiver" />
<receiver android:name="bembibre.attractive.events.receivers.CalendarChangedReceiver" >
<intent-filter>
<action android:name="android.intent.action.PROVIDER_CHANGED" />
<data android:scheme="content" />
<data android:host="com.android.calendar" />
</intent-filter>
</receiver>
<receiver
android:name="bembibre.attractive.events.receivers.MissedCallsChangedReceiver"
android:enabled="true" >
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
</receiver>
<receiver android:name="bembibre.attractive.events.receivers.SmsReceiver" >
<intent-filter android:priority="500" >
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
<!-- Servicios -->
<service android:name="bembibre.attractive.ui.WidgetPaintingService" />
<service android:name="bembibre.attractive.events.wakelocks.DateChangedCpuLockTask" />
<service android:name="bembibre.attractive.events.wakelocks.UpdateWhatsAppDataCpuLockTask" />
<service android:name="bembibre.attractive.events.wakelocks.CalendarChangedCpuLockTask" />
<service android:name="bembibre.attractive.events.wakelocks.MissedCallsChangedCpuLockTask" />
<service android:name="bembibre.attractive.events.wakelocks.SmsChangedCpuLockTask" />
<service android:name="bembibre.attractive.events.wakelocks.UpdateAllDataCpuLockTask" />
<service
android:name="bembibre.attractive.events.EventsAccessibilityService"
android:label="@string/accessibility_service_label"
android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE" >
<meta-data
android:name="android.accessibilityservice"
android:resource="@xml/accessibility_service_config" />
<intent-filter>
<action android:name="android.accessibilityservice.AccessibilityService" />
</intent-filter>
</service>
</application>
</manifest>
list 声明了无障碍服务，它引用了以下配置文件:
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
android:description="@string/accessibility_service_description"
/>
下面是实现无障碍服务的 Java 类的代码:
package bembibre.attractive.events;
import java.util.ArrayList;
import java.util.List;
import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.annotation.SuppressLint;
import android.app.Notification;
import android.os.Build;
import android.view.accessibility.AccessibilityEvent;
import android.widget.RemoteViews;
import bembibre.attractive.events.wakelocks.CpuLockTask;
import bembibre.attractive.events.wakelocks.DeleteAllWhatsAppDataCpuLockTask;
import bembibre.attractive.events.wakelocks.MissedCallsChangedCpuLockTask;
import bembibre.attractive.events.wakelocks.SmsChangedCpuLockTask;
import bembibre.attractive.events.wakelocks.UpdateWhatsAppDataCpuLockTask;
import bembibre.attractive.logging.Logger;
import bembibre.attractive.logic.ApplicationPackages;
import bembibre.attractive.logic.whatsapp.WhatsAppNotificationContent;
import bembibre.attractive.logic.whatsapp.WhatsAppNotificationExtractionStrategy;
import bembibre.attractive.utils.AppUtils;
import bembibre.attractive.utils.ArrayUtils;
/**
* Clase que representa un servicio que debe estar activo todo el tiempo para que el widget de notificaciones funcione
* correctamente. Este servicio se encarga de capturar distintos eventos que hacen que aparezcan datos en el widget.
*
* @author misines
*
*/
public class EventsAccessibilityService extends AccessibilityService {
private static final List<Integer> OPEN_WINDOW_EVENTS = new ArrayList<Integer>();
private static final List<WhatsAppNotificationExtractionStrategy> STRATEGIES = new ArrayList<WhatsAppNotificationExtractionStrategy>();
static {
/*
* Añadimos las estrategias para la extracción de contenido de notificaciones de WhatsApp.
*/
// Aún no dispongo de las estrategias necesarias...
}
@SuppressLint("InlinedApi")
@Override
public void onServiceConnected() {
AccessibilityServiceInfo info = new AccessibilityServiceInfo();
OPEN_WINDOW_EVENTS.add(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
OPEN_WINDOW_EVENTS.add(AccessibilityEvent.TYPE_VIEW_FOCUSED);
// if (Build.VERSION.SDK_INT >= 14) {
// OPEN_WINDOW_EVENTS.add(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
// OPEN_WINDOW_EVENTS.add(AccessibilityEvent.TYPE_VIEW_SCROLLED);
// }
// else {
// OPEN_WINDOW_EVENTS.add(2048);
// OPEN_WINDOW_EVENTS.add(4096);
// }
// Set the type of events that this service wants to listen to. Others
// won't be passed to this service.
int eventTypes = AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED;
for (Integer openWindowEvent : OPEN_WINDOW_EVENTS) {
eventTypes = eventTypes | openWindowEvent;
}
info.eventTypes = eventTypes;
// If you only want this service to work with specific applications, set their
// package names here. Otherwise, when the service is activated, it will listen
// to events from all applications.
info.packageNames = ApplicationPackages.getMergedPackages(ApplicationPackages.PKG_WHATSAPP,
ApplicationPackages.PKG_CALLS, ApplicationPackages.PKG_SMS);
// Set the type of feedback your service will provide.
info.feedbackType = AccessibilityServiceInfo.FEEDBACK_VISUAL;
// Default services are invoked only if no package-specific ones are present
// for the type of AccessibilityEvent generated. This service *is*
// application-specific, so the flag isn't necessary. If this was a
// general-purpose service, it would be worth considering setting the
// DEFAULT flag.
// info.flags = AccessibilityServiceInfo.DEFAULT;
info.notificationTimeout = 100;
this.setServiceInfo(info);
}
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
int eventType = event.getEventType();
String packageName = event.getPackageName().toString();
Logger.log("Evento de accesibilidad detectado de tipo: " + Integer.valueOf(eventType).toString()
+ ", aplicación: " + packageName);
if (isOpenWindowEvent(eventType)) {
if (ArrayUtils.containsIgnoreCase(ApplicationPackages.PKG_WHATSAPP, packageName)) {
Logger.log("Se ha abierto la aplicación WhatsApp");
CpuLockTask.execute(this, DeleteAllWhatsAppDataCpuLockTask.class);
}
/*
* En llamadas y mensajes tenemos que introducir un retardo porque sino suele pasar que la recolección de
* datos se produce antes de que el sistema haya marcado las llamadas y mensajes como leídos.
*/
if (ArrayUtils.containsIgnoreCase(ApplicationPackages.PKG_CALLS, packageName)) {
Logger.log("Se ha abierto la aplicación de las llamadas.");
CpuLockTask.execute(this, MissedCallsChangedCpuLockTask.class, AppUtils.SLEEP_BEFORE_RECOLLECTION);
}
if (ArrayUtils.containsIgnoreCase(ApplicationPackages.PKG_SMS, packageName)) {
Logger.log("Se ha abierto la aplicación de los SMSs.");
CpuLockTask.execute(this, SmsChangedCpuLockTask.class, AppUtils.SLEEP_BEFORE_RECOLLECTION);
}
}
if (((ArrayUtils.containsIgnoreCase(ApplicationPackages.PKG_WHATSAPP, packageName)) && (eventType == AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED))) {
this.processWhatsAppNotificacion(event);
}
}
@Override
public void onInterrupt() {
}
private boolean isOpenWindowEvent(int event) {
boolean result;
if (OPEN_WINDOW_EVENTS.contains(event)) {
result = true;
} else {
result = false;
}
return result;
}
@SuppressLint("NewApi")
private void processWhatsAppNotificacion(AccessibilityEvent event) {
Notification notification;
try {
notification = ((Notification) event.getParcelableData());
} catch (ClassCastException e) {
notification = null;
}
if (notification == null) {
Logger.log("Se ha recibido una notificación de WhatsApp pero no es de clase \"Notification\" o está vacía.");
} else {
WhatsAppNotificationContent content = null;
int index = 1;
for (WhatsAppNotificationExtractionStrategy strategy : STRATEGIES) {
content = strategy.extract(notification);
if (content != null) {
Logger.log("Éxito en estrategia de extracción " + index + ".");
break;
}
index++;
}
if (content == null) {
Logger.log("Se ha recibido una notificación de WhatsApp pero la vista está vacía o ninguna de las estrategias de extracción han funcionado.");
} else {
Logger.log("Se ha recibido una notificación de WhatsApp analizable.");
CpuLockTask.execute(this, UpdateWhatsAppDataCpuLockTask.class, 0, content);
}
}
}
}
我很抱歉代码的注释是西类牙语的。那是因为它是我的母语。
最佳答案
我在小米红米笔记 3(棉花糖)上使用 Greenify，
我做了
:Settings->apps setting->permissions-> autostart
, 和 允许绿化 .它对我有用。
关于android - Android 中的无障碍服务不断被禁用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37519245/