Fix for taking screenshots on Android devices in Crosswalk

src/android/com/telerik/feedback/AppFeedback.java

@@ -12,12 +12,32 @@ import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
 import android.provider.Settings;
+import android.graphics.Bitmap;
+import android.view.View;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
 
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.CountDownLatch;
+
+import com.telerik.widget.feedback.BitmapResolver;
 import com.telerik.widget.feedback.RadFeedback;
 
 public class AppFeedback extends CordovaPlugin implements RadFeedback.OnSendFeedbackFinishedListener {
     private RadFeedback radFeedback;
     private boolean shouldShowFeedback;
+    private static boolean isCrosswalk;
+    private CountDownLatch crosswalkLatch;
+    private Bitmap crosswalkScreenshot;
+
+    // Check if the app uses Crosswalk
+    static {
+        try {
+            Class.forName("org.crosswalk.engine.XWalkWebViewEngine");
+            isCrosswalk = true;
+        } catch (Exception ignore) {
+        }
+    }
 
     @Override
     public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
@@ -29,7 +49,7 @@ public class AppFeedback extends CordovaPlugin implements RadFeedback.OnSendFeed
                     int appResId = cordova.getActivity().getResources().getIdentifier(variableName, "string", cordova.getActivity().getPackageName());
                     String variableValue = cordova.getActivity().getString(appResId);
                     data.put(variableName, variableValue);
-                } catch(Exception ex) {
+                } catch (Exception ex) {
                 }
             }
             callbackContext.success(data);
@@ -63,9 +83,49 @@ public class AppFeedback extends CordovaPlugin implements RadFeedback.OnSendFeed
             this.radFeedback = RadFeedback.instance();
             this.radFeedback.setOnFeedbackFinishedListener(this);
             this.radFeedback.init(apiKey, apiBaseUrl, uid);
+
+            // Change the default BitmapResolver if the app uses Crosswalk
+            if (isCrosswalk) {
+                this.radFeedback.setBitmapResolver(new BitmapResolverCrosswalk());
+            }
         }
     }
-    
+
+    private class BitmapResolverCrosswalk implements BitmapResolver {
+        @Override
+        public Bitmap getBitmapFromView(View view) {
+            AppFeedback.this.crosswalkLatch = new CountDownLatch(1);
+            webView.getPluginManager().postMessage("captureXWalkBitmap", this);
+            try {
+                AppFeedback.this.crosswalkLatch.await(5L, TimeUnit.SECONDS);
+            } catch (Exception e) {
+                AlertDialog.Builder latchErrorBuilder = new AlertDialog.Builder(AppFeedback.this.cordova.getActivity());
+                latchErrorBuilder.setTitle("AppFeedback Error");
+                latchErrorBuilder.setMessage("" + e);
+                latchErrorBuilder.setCancelable(false);
+                latchErrorBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int id) {
+                        dialog.cancel();
+                    }
+                });
+
+                AlertDialog latchError = latchErrorBuilder.create();
+                latchError.show();
+            }
+            return AppFeedback.this.crosswalkScreenshot;
+        }
+    }
+
+    // Handle the screenshot from Crosswalk
+    @Override
+    public Object onMessage(String id, Object data) {
+        if (id.equals("onGotXWalkBitmap")) {
+            this.crosswalkScreenshot = (Bitmap) data;
+            this.crosswalkLatch.countDown();
+        }
+        return null;
+    }
+
     private void showFeedback() {
         if (this.radFeedback != null && this.shouldShowFeedback == true) {
             this.shouldShowFeedback = false;