Android:如何检查是否启用了特定的AccessibilityService

时间:2011-02-22 16:48:13

标签: android accessibility-api

我编写了一款需要使用AccessibilityService的Android应用。 我知道如何检查手机上是否启用了辅助功能,但我无法确定是否已在辅助功能菜单中专门启用了我的应用。

如果AccessibilityService没有运行,我想提示用户,但是找不到这样做的好方法。 是否有任何我可能缺少的API方法可以让我知道设备上启用了哪些辅助功能服务?

8 个答案:

答案 0 :(得分:65)

我最终自己解决了这个问题:

    public boolean isAccessibilityEnabled(){
    int accessibilityEnabled = 0;
    final String LIGHTFLOW_ACCESSIBILITY_SERVICE = "com.example.test/com.example.text.ccessibilityService";
    boolean accessibilityFound = false;
    try {
        accessibilityEnabled = Settings.Secure.getInt(this.getContentResolver(),android.provider.Settings.Secure.ACCESSIBILITY_ENABLED);
        Log.d(LOGTAG, "ACCESSIBILITY: " + accessibilityEnabled);
    } catch (SettingNotFoundException e) {
        Log.d(LOGTAG, "Error finding setting, default accessibility to not found: " + e.getMessage());
    }

    TextUtils.SimpleStringSplitter mStringColonSplitter = new TextUtils.SimpleStringSplitter(':');

    if (accessibilityEnabled==1){
        Log.d(LOGTAG, "***ACCESSIBILIY IS ENABLED***: ");


         String settingValue = Settings.Secure.getString(getContentResolver(), Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
         Log.d(LOGTAG, "Setting: " + settingValue);
         if (settingValue != null) {
             TextUtils.SimpleStringSplitter splitter = mStringColonSplitter;
             splitter.setString(settingValue);
             while (splitter.hasNext()) {
                 String accessabilityService = splitter.next();
                 Log.d(LOGTAG, "Setting: " + accessabilityService);
                 if (accessabilityService.equalsIgnoreCase(ACCESSIBILITY_SERVICE_NAME)){
                     Log.d(LOGTAG, "We've found the correct setting - accessibility is switched on!");
                     return true;
                 }
             }
         }

        Log.d(LOGTAG, "***END***");
    }
    else{
        Log.d(LOGTAG, "***ACCESSIBILIY IS DISABLED***");
    }
    return accessibilityFound;
}

答案 1 :(得分:46)

API Level 14起,还可以通过AccessibilityManager获取已启用的辅助功能服务:

public static boolean isAccessibilityServiceEnabled(Context context, Class<? extends AccessibilityService> service) {
    AccessibilityManager am = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE);
    List<AccessibilityServiceInfo> enabledServices = am.getEnabledAccessibilityServiceList(AccessibilityServiceInfo.FEEDBACK_ALL_MASK);

    for (AccessibilityServiceInfo enabledService : enabledServices) {
        ServiceInfo enabledServiceInfo = enabledService.getResolveInfo().serviceInfo;
        if (enabledServiceInfo.packageName.equals(context.getPackageName()) && enabledServiceInfo.name.equals(service.getName()))
            return true;
    }

    return false;
}

用法:

boolean enabled = isAccessibilityServiceEnabled(context, MyAccessibilityService.class);

答案 2 :(得分:17)

检查是否启用了服务

/**
 * Based on {@link com.android.settingslib.accessibility.AccessibilityUtils#getEnabledServicesFromSettings(Context,int)}
 * @see <a href="https://github.com/android/platform_frameworks_base/blob/d48e0d44f6676de6fd54fd8a017332edd6a9f096/packages/SettingsLib/src/com/android/settingslib/accessibility/AccessibilityUtils.java#L55">AccessibilityUtils</a>
 */
public static boolean isAccessibilityServiceEnabled(Context context, Class<?> accessibilityService) {
    ComponentName expectedComponentName = new ComponentName(context, accessibilityService);

    String enabledServicesSetting = Settings.Secure.getString(context.getContentResolver(),  Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
    if (enabledServicesSetting == null)
        return false;

    TextUtils.SimpleStringSplitter colonSplitter = new TextUtils.SimpleStringSplitter(':');
    colonSplitter.setString(enabledServicesSetting);

    while (colonSplitter.hasNext()) {
        String componentNameString = colonSplitter.next();
        ComponentName enabledService = ComponentName.unflattenFromString(componentNameString);

        if (enabledService != null && enabledService.equals(expectedComponentName))
            return true;
    }

    return false;
}

用法:

boolean enabled = isAccessibilityServiceEnabled(context, MyAccessibilityService.class);

在启用或禁用服务时检测

进行回调:

ContentObserver observer = new ContentObserver() {
    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);
        boolean accessibilityServiceEnabled = isAccessibilityServiceEnabled(context, MyAccessibilityService.class);
        //Do something here
    }
};

订阅:

Uri uri = Settings.Secure.getUriFor(Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
context.getContentResolver().registerContentObserver(uri, false, observer);

完成后取消订阅:

context.getContentResolver().unregisterContentObserver(observer);

请注意,这不适用于the getEnabledAccessibilityServiceList() approach ,因为其值与Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES值不同步。这就是为什么我认为使用Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES是一种更好的“一刀切”方法。

答案 3 :(得分:6)

您能跟踪这项服务是否正在运行吗?如果启用了辅助功能服务,它是否也应该运行?

public class MyAccessibilityService extends AccessibilityService{
public static boolean isEnabled = false; 

 @Override
    public void onServiceConnected() {
      isEnabled = true; 
    }
 @Override 
    public void onDestroy(){ 
      isEnabled = false; 
    }

答案 4 :(得分:2)

在您的活动服务刚刚启动时获取ID。 在所有初始化调用之后的Activity服务OnSeriviceCeonnected中。使用这个......

AccessibilityServiceInfo serviceInfo = this.getServiceInfo();
    String accessibilityId = serviceInfo.getId();

需要Jelly Bean API

然后您可以使用Martin的代码(isAccessibilityEnabled)来检查正在运行的服务。

答案 5 :(得分:0)

也许为时已晚,但是这是我检查无障碍服务状态的方法:

$ adb shell dumpsys accessibility

结果:

ACCESSIBILITY MANAGER (dumpsys accessibility)
User state[attributes:{id=0, currentUser=true, accessibilityEnabled=false, touchExplorationEnabled=false, displayMagnificationEnabled=false}
           services:{}]

答案 6 :(得分:-1)

 AccessibilityManager accessibilityManager = (AccessibilityManager)context.getSystemService(Context.ACCESSIBILITY_SERVICE);
        List<AccessibilityServiceInfo> runningservice = accessibilityManager.getEnabledAccessibilityServiceList(AccessibilityServiceInfo.FEEDBACK_ALL_MASK);

        accessibilityManager.addAccessibilityStateChangeListener(new AccessibilityManager.AccessibilityStateChangeListener() {
            @Override
            public void onAccessibilityStateChanged(boolean b) {
                Toast.makeText(MainActivity.this, "permission "+b, Toast.LENGTH_SHORT).show();
            }
        });

只要状态发生变化,就会调用Listner 你可以跟踪布尔值来检查权限 这是迄今为止最简单,最轻便的检查权限的解决方案

答案 7 :(得分:-3)

这需要更多次

AccessibilityManager am = (AccessibilityManager) context
        .getSystemService(Context.ACCESSIBILITY_SERVICE);