add: javascript support

app/src/main/java/com/stardust/view/accessibility/AccessibilityServiceUtils.java

@@ -0,0 +1,39 @@
+package com.stardust.view.accessibility;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.provider.Settings;
+import android.text.TextUtils;
+
+/**
+ * Created by Stardust on 2017/1/26.
+ */
+
+public class AccessibilityServiceUtils {
+
+    public static void goToPermissionSetting(Context context) {
+        context.startActivity(new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS));
+    }
+
+    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;
+    }
+}