Naming fixed;

Warnings fixed;
Nexus 7 support added to manifest.

samples/android/camera-preview/AndroidManifest.xml

@@ -3,9 +3,9 @@
     android:versionCode="1"
     android:versionName="1.0" >
 
-    <uses-permission android:name="android.permission.CAMERA"/>
-    <uses-feature android:name="android.hardware.camera" />
-    <uses-feature android:name="android.hardware.camera.autofocus" />
+    <uses-permission android:name="android.permission.CAMERA" required="false"/>
+    <uses-feature android:name="android.hardware.camera" required="false"/>
+    <uses-feature android:name="android.hardware.camera.autofocus" required="false"/>
 
     <uses-sdk android:minSdkVersion="8" />
 
@@ -14,7 +14,7 @@
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
         <activity
-            android:name=".CameraWriterActivity"
+            android:name=".PreviewActivity"
             android:label="@string/title_activity_camera_writer" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

samples/android/camera-preview/res/layout/activity_camera_writer.xml

@@ -3,7 +3,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent" >
 
-	<view class="org.opencv.test.camerawriter.OpenCvNativeCameraView"
+    <view class="org.opencv.test.camerawriter.NativeCameraView"
         android:id="@+id/camera_surface_view"
         android:layout_width = "fill_parent"
         android:layout_height="fill_parent"

samples/android/camera-preview/src/org/opencv/test/camerawriter/OpenCvCameraBridgeViewBase.java → samples/android/camera-preview/src/org/opencv/test/camerawriter/CameraViewBase.java

@@ -5,8 +5,6 @@ import java.util.List;
 import org.opencv.android.Utils;
 import org.opencv.core.Mat;
 import org.opencv.core.Size;
-import org.opencv.highgui.Highgui;
-import org.opencv.highgui.VideoCapture;
 
 import android.content.Context;
 import android.graphics.Bitmap;
@@ -23,7 +21,7 @@ import android.view.SurfaceView;
  * frame to the screen.
  * The clients shall implement CvCameraViewListener
  */
-public abstract class OpenCvCameraBridgeViewBase extends SurfaceView implements SurfaceHolder.Callback {
+public abstract class CameraViewBase extends SurfaceView implements SurfaceHolder.Callback {
 
         private static final int MAX_UNSPECIFIED = -1;
 
@@ -36,8 +34,9 @@ public abstract class OpenCvCameraBridgeViewBase extends SurfaceView implements
         private Bitmap mCacheBitmap;
 
 
-        public OpenCvCameraBridgeViewBase(Context context, AttributeSet attrs) {
+        public CameraViewBase(Context context, AttributeSet attrs) {
                 super(context,attrs);
+                Log.d(TAG, "call CameraViewBase constructor");
                 getHolder().addCallback(this);
                 mMaxWidth = MAX_UNSPECIFIED;
                 mMaxHeight = MAX_UNSPECIFIED;
@@ -113,7 +112,7 @@ public abstract class OpenCvCameraBridgeViewBase extends SurfaceView implements
 
         /**
          * This method is provided for clients, so they can enable the camera connection.
-         * The actuall onCameraViewStarted callback will be delivered only after both this method is called and surface is available
+         * The actual onCameraViewStarted callback will be delivered only after both this method is called and surface is available
          */
         public void enableView() {
                 synchronized(mSyncObject) {
@@ -124,7 +123,7 @@ public abstract class OpenCvCameraBridgeViewBase extends SurfaceView implements
 
         /**
          * This method is provided for clients, so they can disable camera connection and stop
-         * the delivery of frames eventhough the surfaceview itself is not destroyed and still stays on the scren
+         * the delivery of frames even though the surface view itself is not destroyed and still stays on the scren
          */
         public void disableView() {
                 synchronized(mSyncObject) {
@@ -143,9 +142,9 @@ public abstract class OpenCvCameraBridgeViewBase extends SurfaceView implements
          * size - the biggest size which less or equal the size set will be selected.
          * As an example - we set setMaxFrameSize(200,200) and we have 176x152 and 320x240 sizes. The
          * preview frame will be selected with 176x152 size.
-         * This method is usefull when need to restrict the size of preview frame for some reason (for example for video recording)
+         * This method is useful when need to restrict the size of preview frame for some reason (for example for video recording)
          * @param maxWidth - the maximum width allowed for camera frame.
-         * @param maxHeight - the maxumum height allowed for camera frame
+         * @param maxHeight - the maximum height allowed for camera frame
          */
         public void setMaxFrameSize(int maxWidth, int maxHeight) {
                 mMaxWidth = maxWidth;
@@ -212,7 +211,7 @@ public abstract class OpenCvCameraBridgeViewBase extends SurfaceView implements
         private void onEnterStartedState() {
 
                 connectCamera(getWidth(), getHeight());
-                /* Now create cahe Bitmap */
+                /* Now create cache Bitmap */
                 mCacheBitmap = Bitmap.createBitmap(mFrameWidth, mFrameHeight, Bitmap.Config.ARGB_8888);
 
         }
@@ -249,6 +248,7 @@ public abstract class OpenCvCameraBridgeViewBase extends SurfaceView implements
                 if (mCacheBitmap != null) {
                     Canvas canvas = getHolder().lockCanvas();
                     if (canvas != null) {
+			canvas.drawColor(0, android.graphics.PorterDuff.Mode.CLEAR);
 			canvas.drawBitmap(mCacheBitmap, (canvas.getWidth() - mCacheBitmap.getWidth()) / 2, (canvas.getHeight() - mCacheBitmap.getHeight()) / 2, null);
                         getHolder().unlockCanvasAndPost(canvas);
                     }

samples/android/camera-preview/src/org/opencv/test/camerawriter/OpenCvNativeCameraView.java → samples/android/camera-preview/src/org/opencv/test/camerawriter/NativeCameraView.java

 package org.opencv.test.camerawriter;
 
-import org.opencv.android.Utils;
 import org.opencv.core.Mat;
 import org.opencv.core.Size;
 import org.opencv.highgui.Highgui;
 import org.opencv.highgui.VideoCapture;
 
 import android.content.Context;
-import android.graphics.Bitmap;
-import android.graphics.Canvas;
 import android.util.AttributeSet;
 import android.util.Log;
 
@@ -17,7 +14,7 @@ import android.util.Log;
  * Due to the big amount of work done, by the base class this child is only responsible
  * for creating camera, destroying camera and delivering frames while camera is enabled
  */
-public class OpenCvNativeCameraView extends OpenCvCameraBridgeViewBase {
+public class NativeCameraView extends CameraViewBase {
 
         public static final String TAG = "OpenCvNativeCameraView";
         private boolean mStopThread;
@@ -25,7 +22,7 @@ public class OpenCvNativeCameraView extends OpenCvCameraBridgeViewBase {
         private VideoCapture mCamera;
 
 
-    public OpenCvNativeCameraView(Context context, AttributeSet attrs) {
+    public NativeCameraView(Context context, AttributeSet attrs) {
                 super(context, attrs);
         }
 
@@ -40,7 +37,7 @@ public class OpenCvNativeCameraView extends OpenCvCameraBridgeViewBase {
                 initializeCamera(getWidth(), getHeight());
 
                 /* now we can start update thread */
-        mThread = new Thread(new CameraWorker(getWidth(), getHeight()));
+                mThread = new Thread(new CameraWorker());
                 mThread.start();
         }
 
@@ -94,20 +91,7 @@ public class OpenCvNativeCameraView extends OpenCvCameraBridgeViewBase {
         }
 
         private class CameraWorker implements Runnable {
-
-        private Mat mRgba = new Mat();
-        private int mWidth;
-        private int mHeight;
-
-        CameraWorker(int w, int h) {
-            mWidth = w;
-            mHeight = h;
-        }
-
             public void run() {
-            Mat modified;
-
-
                         do {
                                 if (!mCamera.grab()) {
                                         Log.e(TAG, "Camera frame grab failed");
@@ -118,8 +102,9 @@ public class OpenCvNativeCameraView extends OpenCvCameraBridgeViewBase {
                     deliverAndDrawFrame(mRgba);
 
                         } while (!mStopThread);
-
                 }
+
+            private Mat mRgba = new Mat();
         }
 
 }

samples/android/camera-preview/src/org/opencv/test/camerawriter/CameraWriterActivity.java → samples/android/camera-preview/src/org/opencv/test/camerawriter/PreviewActivity.java

@@ -4,19 +4,17 @@ import org.opencv.android.BaseLoaderCallback;
 import org.opencv.android.LoaderCallbackInterface;
 import org.opencv.android.OpenCVLoader;
 import org.opencv.core.Mat;
-import org.opencv.test.camerawriter.OpenCvCameraBridgeViewBase.CvCameraViewListener;
+import org.opencv.test.camerawriter.CameraViewBase.CvCameraViewListener;
 
 import android.os.Bundle;
 import android.app.Activity;
 import android.util.Log;
 
-public class CameraWriterActivity extends Activity implements CvCameraViewListener {
+public class PreviewActivity extends Activity implements CvCameraViewListener {
 
     protected static final String TAG = "CameraWriterActivity";
 
-
-    private OpenCvCameraBridgeViewBase mCameraView;
-
+        private CameraViewBase mCameraView;
 
     private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
 	@Override
@@ -40,7 +38,7 @@ public class CameraWriterActivity extends Activity implements CvCameraViewListen
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_camera_writer);
 
-        mCameraView = (OpenCvCameraBridgeViewBase)findViewById(R.id.camera_surface_view);
+        mCameraView = (CameraViewBase)findViewById(R.id.camera_surface_view);
         mCameraView.setCvCameraViewListener(this);
         OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_2, this, mLoaderCallback);