Fix issue #32 Doesn't work with cordova-plugin-crosswalk-webview

Use reflection for getView, getSettings, getTextSize/getTextZoom, and
setTextSize/setTextZoom so that the View does not need to be cast as an
android.webkit.WebView.

src/android/com/phonegap/plugin/mobileaccessibility/AbstractMobileAccessibilityHelper.java

@@ -23,9 +23,9 @@ package com.phonegap.plugin.mobileaccessibility;
 
 import android.view.ViewParent;
 
-public abstract class AbstractMobileAccessibilityHelper {
-    protected MobileAccessibility mMobileAccessibility;
-    protected ViewParent mParent;
+abstract class AbstractMobileAccessibilityHelper {
+    MobileAccessibility mMobileAccessibility;
+    ViewParent mParent;
     public abstract void initialize(MobileAccessibility mobileAccessibility);
     public abstract boolean isClosedCaptioningEnabled();
     public abstract boolean isScreenReaderRunning();

src/android/com/phonegap/plugin/mobileaccessibility/DonutMobileAccessibilityHelper.java

@@ -26,6 +26,7 @@ import android.content.Context;
 import android.os.Build;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityManager;
+import android.view.View;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
 
@@ -36,19 +37,20 @@ import java.lang.reflect.Method;
 @TargetApi(Build.VERSION_CODES.DONUT)
 public class DonutMobileAccessibilityHelper extends
         AbstractMobileAccessibilityHelper {
-    protected AccessibilityManager mAccessibilityManager;
-    protected WebView mWebView;
+    AccessibilityManager mAccessibilityManager;
+    View mView;
 
     @Override
     public void initialize(MobileAccessibility mobileAccessibility) {
         mMobileAccessibility = mobileAccessibility;
-
+        WebView view;
         try {
-            mWebView = (WebView) mobileAccessibility.webView;
+            view = (WebView) mobileAccessibility.webView;
+            mView = view;
         } catch(ClassCastException ce) {  // cordova-android 4.0+
             try {
                 Method getView = mobileAccessibility.webView.getClass().getMethod("getView");
-                mWebView = (WebView) getView.invoke(mobileAccessibility.webView);
+                mView = (View) getView.invoke(mobileAccessibility.webView);
             } catch (NoSuchMethodException e) {
                 e.printStackTrace();
             } catch (InvocationTargetException e) {
@@ -108,9 +110,9 @@ public class DonutMobileAccessibilityHelper extends
         final int eventType = AccessibilityEvent.TYPE_VIEW_FOCUSED;
         final AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
         event.getText().add(text);
-        event.setEnabled(mWebView.isEnabled());
-        event.setClassName(mWebView.getClass().getName());
-        event.setPackageName(mWebView.getContext().getPackageName());
+        event.setEnabled(mView.isEnabled());
+        event.setClassName(mView.getClass().getName());
+        event.setPackageName(mView.getContext().getPackageName());
         event.setContentDescription(null);
 
         mAccessibilityManager.sendAccessibilityEvent(event);
@@ -120,7 +122,23 @@ public class DonutMobileAccessibilityHelper extends
     @Override
     public double getTextZoom() {
         double zoom = 100;
-        WebSettings.TextSize wTextSize = mWebView.getSettings().getTextSize();
+        WebSettings.TextSize wTextSize = WebSettings.TextSize.NORMAL;
+
+        try {
+            Method getSettings = mView.getClass().getMethod("getSettings");
+            Object wSettings = getSettings.invoke(mView);
+            Method getTextSize = wSettings.getClass().getMethod("getTextSize");
+            wTextSize = (WebSettings.TextSize) getTextSize.invoke(wSettings);
+        } catch(ClassCastException ce) {
+            ce.printStackTrace();
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+
         switch (wTextSize) {
         case LARGEST:
             zoom = 200;
@@ -128,39 +146,42 @@ public class DonutMobileAccessibilityHelper extends
         case LARGER:
             zoom = 150;
             break;
-        case NORMAL:
-            zoom = 100;
-            break;
         case SMALLER:
             zoom = 75;
             break;
         case SMALLEST:
             zoom = 50;
             break;
-        default:
-            zoom = 100;
-            break;
         }
+
         return zoom;
     }
 
     @SuppressWarnings("deprecation")
     @Override
     public void setTextZoom(double textZoom) {
-        final double zoom = textZoom;
-        WebSettings.TextSize wTextSize = WebSettings.TextSize.NORMAL;
-        if (zoom > 115) {
+        WebSettings.TextSize wTextSize = WebSettings.TextSize.SMALLEST;
+        if (textZoom > 115) {
             wTextSize = WebSettings.TextSize.LARGEST;
-        } else if (zoom > 100) {
+        } else if (textZoom > 100) {
             wTextSize = WebSettings.TextSize.LARGER;
-        } else if (zoom == 100) {
+        } else if (textZoom == 100) {
             wTextSize = WebSettings.TextSize.NORMAL;
-        } else if (zoom > 50) {
+        } else if (textZoom > 50) {
             wTextSize = WebSettings.TextSize.SMALLER;
-        } else {
-            wTextSize = WebSettings.TextSize.SMALLEST;
         }
         //Log.i("MobileAccessibility", "fontScale = " + zoom + ", WebSettings.TextSize = " + wTextSize.toString());
-        mWebView.getSettings().setTextSize(wTextSize);
+        try {
+            Method getSettings = mView.getClass().getMethod("getSettings");
+            Object wSettings = getSettings.invoke(mView);
+            Method setTextSize = wSettings.getClass().getMethod("setTextSize", WebSettings.TextSize.class);
+            setTextSize.invoke(wSettings, wTextSize);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
     }
 }

src/android/com/phonegap/plugin/mobileaccessibility/IceCreamSandwichMobileAccessibilityHelper.java

@@ -26,10 +26,14 @@ import android.annotation.TargetApi;
 import android.os.Build;
 import android.view.accessibility.AccessibilityManager.AccessibilityStateChangeListener;
 
+import java.lang.IllegalAccessException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
 @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
 public class IceCreamSandwichMobileAccessibilityHelper extends
         DonutMobileAccessibilityHelper {
-    protected AccessibilityStateChangeListener mAccessibilityStateChangeListener;
+    private AccessibilityStateChangeListener mAccessibilityStateChangeListener;
 
     @Override
     public boolean isScreenReaderRunning() {
@@ -52,17 +56,44 @@ public class IceCreamSandwichMobileAccessibilityHelper extends
 
     @Override
     public double getTextZoom() {
-        return mWebView.getSettings().getTextZoom();
+        double zoom = 100;
+        try {
+            Method getSettings = mView.getClass().getMethod("getSettings");
+            Object wSettings = getSettings.invoke(mView);
+            Method getTextZoom = wSettings.getClass().getMethod("getTextZoom");
+            zoom = Double.valueOf(getTextZoom.invoke(wSettings).toString());
+        } catch (ClassCastException ce) {
+            ce.printStackTrace();
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return zoom;
     }
 
     @Override
     public void setTextZoom(double textZoom) {
-        final double zoom = textZoom;
         //Log.i("MobileAccessibility", "setTextZoom(" + zoom + ")");
-        mWebView.getSettings().setTextZoom((int) zoom);
+        try {
+            Method getSettings = mView.getClass().getMethod("getSettings");
+            Object wSettings = getSettings.invoke(mView);
+            Method setTextZoom = wSettings.getClass().getMethod("setTextZoom", Integer.TYPE);
+            setTextZoom.invoke(wSettings, (int) textZoom);
+        } catch (ClassCastException ce) {
+            ce.printStackTrace();
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
     }
 
-    protected class InternalAccessibilityStateChangeListener
+    private class InternalAccessibilityStateChangeListener
         implements AccessibilityStateChangeListener {
 
         @Override

src/android/com/phonegap/plugin/mobileaccessibility/JellyBeanMobileAccessibilityHelper.java

@@ -26,11 +26,6 @@ import com.phonegap.plugin.mobileaccessibility.MobileAccessibility;
 import android.annotation.TargetApi;
 import android.os.Build;
 import android.view.accessibility.AccessibilityEvent;
-import android.webkit.WebView;
-
-import java.lang.IllegalAccessException;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
 
 @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
 public class JellyBeanMobileAccessibilityHelper extends
@@ -38,26 +33,8 @@ public class JellyBeanMobileAccessibilityHelper extends
 
     @Override
     public void initialize(MobileAccessibility mobileAccessibility) {
-        WebView view;
         super.initialize(mobileAccessibility);
-
-        try {
-            view = (WebView) mobileAccessibility.webView;
-            mParent = view.getParentForAccessibility();
-        } catch(ClassCastException ce) {  // cordova-android 4.0+
-            try {
-                Method getView = mobileAccessibility.webView.getClass().getMethod("getView");
-                view = (WebView) getView.invoke(mobileAccessibility.webView);
-                mParent = view.getParentForAccessibility();
-            } catch (NoSuchMethodException e) {
-                e.printStackTrace();
-            } catch (InvocationTargetException e) {
-                e.printStackTrace();
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-        }
-
+        mParent = mView.getParentForAccessibility();
     }
 
     @Override
@@ -66,10 +43,10 @@ public class JellyBeanMobileAccessibilityHelper extends
             mAccessibilityManager.interrupt();
             AccessibilityEvent event = AccessibilityEvent.obtain(
                     AccessibilityEvent.TYPE_ANNOUNCEMENT);
-            mWebView.onInitializeAccessibilityEvent(event);
+            mView.onInitializeAccessibilityEvent(event);
             event.getText().add(text);
             event.setContentDescription(null);
-            mParent.requestSendAccessibilityEvent(mWebView, event);
+            mParent.requestSendAccessibilityEvent(mView, event);
         }
     }
 }

src/android/com/phonegap/plugin/mobileaccessibility/KitKatMobileAccessibilityHelper.java

@@ -31,9 +31,9 @@ import android.view.accessibility.CaptioningManager.CaptioningChangeListener;
 @TargetApi(19)
 public class KitKatMobileAccessibilityHelper extends
         JellyBeanMobileAccessibilityHelper {
-    protected CaptioningManager mCaptioningManager;
-    protected CaptioningChangeListener mCaptioningChangeListener;
-    protected TouchExplorationStateChangeListener mTouchExplorationStateChangeListener;
+    private CaptioningManager mCaptioningManager;
+    private CaptioningChangeListener mCaptioningChangeListener;
+    private TouchExplorationStateChangeListener mTouchExplorationStateChangeListener;
 
     @Override
     public void initialize(MobileAccessibility mobileAccessibility) {
@@ -61,7 +61,6 @@ public class KitKatMobileAccessibilityHelper extends
         super.addStateChangeListeners();
         if (mCaptioningChangeListener == null) {
             mCaptioningChangeListener = new CaptioningChangeListener() {
-                /** @hide */
                 @Override
                 public void onEnabledChanged(boolean enabled) {
                     onCaptioningEnabledChanged(enabled);
@@ -89,7 +88,7 @@ public class KitKatMobileAccessibilityHelper extends
         }
     }
 
-    protected class InternalTouchExplorationStateChangeListener
+    private class InternalTouchExplorationStateChangeListener
         implements TouchExplorationStateChangeListener {
 
         @Override

src/android/com/phonegap/plugin/mobileaccessibility/MobileAccessibility.java

@@ -41,13 +41,13 @@ import java.lang.reflect.Method;
  * This class provides information on the status of native accessibility services to JavaScript.
  */
 public class MobileAccessibility extends CordovaPlugin {
-    protected AbstractMobileAccessibilityHelper mMobileAccessibilityHelper;
-    protected CallbackContext mCallbackContext = null;
-    protected boolean mIsScreenReaderRunning = false;
-    protected boolean mClosedCaptioningEnabled = false;
-    protected boolean mTouchExplorationEnabled = false;
-    protected boolean mCachedIsScreenReaderRunning = false;
-    protected float mFontScale = 1;
+    private AbstractMobileAccessibilityHelper mMobileAccessibilityHelper;
+    private CallbackContext mCallbackContext = null;
+    private boolean mIsScreenReaderRunning = false;
+    private boolean mClosedCaptioningEnabled = false;
+    private boolean mTouchExplorationEnabled = false;
+    private boolean mCachedIsScreenReaderRunning = false;
+    private float mFontScale = 1;
 
     @Override
     public void initialize(CordovaInterface cordova, CordovaWebView webView) {
@@ -144,8 +144,8 @@ public class MobileAccessibility extends CordovaPlugin {
                     } catch(ClassCastException ce) {  // cordova-android 4.0+
                         try {   // cordova-android 4.0+
                             Method getView = webView.getClass().getMethod("getView");
-                            view = (WebView) getView.invoke(webView);
-                            view.reload();
+                            Method reload = getView.invoke(webView).getClass().getMethod("reload");
+                            reload.invoke(webView);
                         } catch (NoSuchMethodException e) {
                             e.printStackTrace();
                         } catch (InvocationTargetException e) {
@@ -166,14 +166,13 @@ public class MobileAccessibility extends CordovaPlugin {
         stop();
     }
 
-    protected boolean isScreenReaderRunning(final CallbackContext callbackContext) {
+    private void isScreenReaderRunning(final CallbackContext callbackContext) {
         mIsScreenReaderRunning = mMobileAccessibilityHelper.isScreenReaderRunning();
         cordova.getThreadPool().execute(new Runnable() {
             public void run() {
                     callbackContext.success(mIsScreenReaderRunning ? 1 : 0);
                 }
             });
-        return mIsScreenReaderRunning;
     }
 
     protected boolean isScreenReaderRunning() {
@@ -181,14 +180,13 @@ public class MobileAccessibility extends CordovaPlugin {
         return mIsScreenReaderRunning;
     }
 
-    protected boolean isClosedCaptioningEnabled(final CallbackContext callbackContext) {
+    private void isClosedCaptioningEnabled(final CallbackContext callbackContext) {
         mClosedCaptioningEnabled = mMobileAccessibilityHelper.isClosedCaptioningEnabled();
         cordova.getThreadPool().execute(new Runnable() {
             public void run() {
                 callbackContext.success(mClosedCaptioningEnabled ? 1 : 0);
             }
         });
-        return mClosedCaptioningEnabled;
     }
 
     protected boolean isClosedCaptioningEnabled() {
@@ -196,14 +194,13 @@ public class MobileAccessibility extends CordovaPlugin {
         return mClosedCaptioningEnabled;
     }
 
-    protected boolean isTouchExplorationEnabled(final CallbackContext callbackContext) {
+    private void isTouchExplorationEnabled(final CallbackContext callbackContext) {
         mTouchExplorationEnabled= mMobileAccessibilityHelper.isTouchExplorationEnabled();
         cordova.getThreadPool().execute(new Runnable() {
             public void run() {
                 callbackContext.success(mTouchExplorationEnabled ? 1 : 0);
             }
         });
-        return mTouchExplorationEnabled;
     }
 
     protected boolean isTouchExplorationEnabled() {
@@ -211,7 +208,7 @@ public class MobileAccessibility extends CordovaPlugin {
         return mTouchExplorationEnabled;
     }
 
-    protected void announceForAccessibility(CharSequence text, final CallbackContext callbackContext) {
+    private void announceForAccessibility(CharSequence text, final CallbackContext callbackContext) {
         mMobileAccessibilityHelper.announceForAccessibility(text);
         if (callbackContext != null) {
             JSONObject info = new JSONObject();
@@ -252,7 +249,7 @@ public class MobileAccessibility extends CordovaPlugin {
             });
     }
 
-    public void getTextZoom(final CallbackContext callbackContext) {
+    private void getTextZoom(final CallbackContext callbackContext) {
         cordova.getActivity().runOnUiThread(new Runnable() {
             public void run() {
                 final double textZoom = mMobileAccessibilityHelper.getTextZoom();
@@ -263,13 +260,13 @@ public class MobileAccessibility extends CordovaPlugin {
         });
     }
 
-    public void setTextZoom(final double textZoom, final CallbackContext callbackContext) {
+    private void setTextZoom(final double textZoom, final CallbackContext callbackContext) {
         cordova.getActivity().runOnUiThread(new Runnable() {
             public void run() {
                 mMobileAccessibilityHelper.setTextZoom(textZoom);
                 if (callbackContext != null) {
                     callbackContext.success((int) mMobileAccessibilityHelper.getTextZoom());
-                };
+                }
             }
         });
     }
@@ -282,7 +279,7 @@ public class MobileAccessibility extends CordovaPlugin {
         });
     }
 
-    public void updateTextZoom(final CallbackContext callbackContext) {
+    private void updateTextZoom(final CallbackContext callbackContext) {
         float fontScale = cordova.getActivity().getResources().getConfiguration().fontScale;
         if (fontScale != mFontScale) {
             mFontScale = fontScale;
@@ -291,7 +288,7 @@ public class MobileAccessibility extends CordovaPlugin {
         setTextZoom(textZoom, callbackContext);
     }
 
-    protected void sendMobileAccessibilityStatusChangedCallback() {
+    private void sendMobileAccessibilityStatusChangedCallback() {
         if (this.mCallbackContext != null) {
             PluginResult result = new PluginResult(PluginResult.Status.OK, getMobileAccessibilityStatus());
             result.setKeepCallback(true);
@@ -300,7 +297,7 @@ public class MobileAccessibility extends CordovaPlugin {
     }
 
     /* Get the current mobile accessibility status. */
-    protected JSONObject getMobileAccessibilityStatus() {
+    private JSONObject getMobileAccessibilityStatus() {
         JSONObject status = new JSONObject();
         try {
             status.put("isScreenReaderRunning", mIsScreenReaderRunning);
@@ -315,14 +312,14 @@ public class MobileAccessibility extends CordovaPlugin {
         return status;
     }
 
-    protected void start(CallbackContext callbackContext) {
+    private void start(CallbackContext callbackContext) {
         //Log.i("MobileAccessibility", "MobileAccessibility.start");
         mCallbackContext = callbackContext;
         mMobileAccessibilityHelper.addStateChangeListeners();
         sendMobileAccessibilityStatusChangedCallback();
     }
 
-    protected void stop() {
+    private void stop() {
         //Log.i("MobileAccessibility", "MobileAccessibility.stop");
         if (mCallbackContext != null) {
             sendMobileAccessibilityStatusChangedCallback();