Fix a few warning in the Android demo compilation.

Emgu.CV.Example/Android/ButtonMessageImageActivity.cs

@@ -43,8 +43,7 @@ namespace AndroidExamples
 
             //dummy code to load the opencv libraries
             bool loaded = CvInvoke.CheckLibraryLoaded();
-            //CvInvoke.CV_FOURCC('m', 'j', 'p', 'g');
-
+        
         }
 
         /*
@@ -75,7 +74,7 @@ namespace AndroidExamples
             String action;
             if (haveCameraOption & havePickImgOption)
             {
-                int result = GetUserResponse(this, "Use Image from", "Default", "Photo Library", "Camera");
+                int result = GetUserResponse(this, pickImgString, "Default", "Photo Library", "Camera");
                 if (result == 1)
                     action = "Default";
                 else if (result == 0)
@@ -88,7 +87,7 @@ namespace AndroidExamples
             }
             else if (havePickImgOption)
             {
-                int result = GetUserResponse(this, "Use Image from", "Default", "Photo Library", "Cancel");
+                int result = GetUserResponse(this, pickImgString, "Default", "Photo Library", "Cancel");
 
                 if (result == 1)
                     action = "Default";

Emgu.CV.Example/Android/Camera2Activity.cs

@@ -530,27 +530,28 @@ namespace AndroidExamples
 
 
         /// <summary>
-        /// {@link CameraDevice.StateCallback} is called when the currently active {@link CameraDevice}
+        /// CameraStateListener is called when the currently active {@link CameraDevice}
         /// changes its state.
         /// </summary>
         CameraDevice.StateCallback mStateCallback;
-        class StateCallback : CameraDevice.StateCallback
+
+        public class CameraStateListener : CameraDevice.StateCallback
         {
             Camera2Activity Activity { get; set; }
 
-            public StateCallback(Camera2Activity activity)
+            public CameraStateListener(Camera2Activity activity)
             {
                 Activity = activity;
             }
 
             public override void OnOpened(CameraDevice camera)
             {
-                
+
                 // This method is called when the camera is opened.  We start camera preview here if
                 // the TextureView displaying this has been set up.
                 lock (mCameraStateLock)
                 {
-                    
+
                     mState = STATE_OPENED;
                     mCameraOpenCloseLock.Release();
                     mCameraDevice = camera;
@@ -560,28 +561,28 @@ namespace AndroidExamples
                     {
                         CreateCameraPreviewSessionLocked();
                     }*/
-                    
-                    
+
+
                 }
             }
 
             public override void OnDisconnected(CameraDevice camera)
             {
-                
+
                 lock (mCameraStateLock)
                 {
-                    
+
                     mState = STATE_CLOSED;
                     mCameraOpenCloseLock.Release();
                     camera.Close();
                     mCameraDevice = null;
-                    
+
                 }
             }
 
             public override void OnError(CameraDevice camera, Android.Hardware.Camera2.CameraError error)
             {
-                
+
                 Log.Error(TAG, "Received camera device error: " + error);
                 lock (mCameraStateLock)
                 {
@@ -595,7 +596,7 @@ namespace AndroidExamples
                 {
                     activity.Finish();
                 }
-             }
+            }
         }
 
         /// <summary>
@@ -748,7 +749,7 @@ namespace AndroidExamples
             
             var activity = this;
             CameraManager manager = (CameraManager)activity.GetSystemService(Context.CameraService);
-            mStateCallback = new StateCallback(this);
+            mStateCallback = new CameraStateListener(this);
             try
             {
 

Emgu.CV.Example/LicensePlateRecognition/LicensePlateDetector.cs

@@ -266,7 +266,7 @@ namespace LicensePlateRecognition
 
                             UMat filteredPlate = FilterPlate(plate);
 
-                            Tesseract.Character[] words;
+                            //Tesseract.Character[] words;
                             StringBuilder strBuilder = new StringBuilder();
                             using (UMat tmp = filteredPlate.Clone())
                             {

Emgu.CV.Example/XamarinForms/Core/ButtonTextImagePage.xaml.cs

@@ -64,7 +64,7 @@ namespace Emgu.CV.XamarinForms
                 if (action.Equals("Default"))
                 {
 #if __ANDROID__
-                    mats[i] = new Mat(Forms.Context.Assets, imageNames[i]);
+                    mats[i] = new Mat( Android.App.Application.Context.Assets, imageNames[i]);
 
 #else
                     mats[i] = CvInvoke.Imread(imageNames[i], ImreadModes.AnyColor);