Refactoring. Bug fixing. New logic for sizing. Some docs. Correct orientation in EXIF headers

camerakit/build.gradle

@@ -7,14 +7,14 @@ ext {
 }
 
 android {
-    compileSdkVersion 25
+    compileSdkVersion rootProject.ext.compileSdkVersion
-    buildToolsVersion "25.0.2"
+    buildToolsVersion rootProject.ext.buildToolsVersion
 
     defaultConfig {
-        minSdkVersion 15
+        minSdkVersion rootProject.ext.minSdkVersion
-        targetSdkVersion 25
+        targetSdkVersion rootProject.ext.targetSdkVersion
         versionCode 1
-        versionName "1.0"
+        versionName "0.1"
     }
     buildTypes {
         release {
@@ -40,5 +40,5 @@ dependencies {
     annotationProcessor 'android.arch.lifecycle:compiler:1.0.0-alpha1'
 }
 
-apply from: 'https://raw.githubusercontent.com/blundell/release-android-library/master/android-release-aar.gradle'
+// apply from: 'https://raw.githubusercontent.com/blundell/release-android-library/master/android-release-aar.gradle'
 

camerakit/src/main/AndroidManifest.xml

@@ -2,19 +2,24 @@
     package="com.flurgle.camerakit">
 
     <uses-permission android:name="android.permission.CAMERA" />
-    <uses-permission android:name="android.permission.RECORD_AUDIO" />
 
-    <uses-feature android:name="android.hardware.camera" />
+    <!-- Have developers add this. We don't want AUDIO permission to be auto-added to
+         apps that just want to take pictures. -->
+    <!-- uses-permission android:name="android.permission.RECORD_AUDIO" /-->
+
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="true"/>
     <uses-feature
         android:name="android.hardware.camera.autofocus"
-        android:required="false" />
+        android:required="false"/>
     <uses-feature
         android:name="android.hardware.camera.front"
-        android:required="false" />
+        android:required="false"/>
     <uses-feature
         android:name="android.hardware.microphone"
-        android:required="false" />
+        android:required="false"/>
 
-    <application />
+    <application/>
 
 </manifest>

camerakit/src/main/api16/com/flurgle/camerakit/Camera1.java

@@ -5,7 +5,6 @@ import android.graphics.YuvImage;
 import android.hardware.Camera;
 import android.media.CamcorderProfile;
 import android.media.MediaRecorder;
-import android.os.Build;
 import android.os.Handler;
 import android.util.Log;
 import android.support.annotation.Nullable;
@@ -16,11 +15,8 @@ import android.view.View;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.HashSet;
+import java.util.Collections;
-import java.util.Iterator;
 import java.util.List;
-import java.util.Set;
-import java.util.TreeSet;
 
 import static com.flurgle.camerakit.CameraKit.Constants.FLASH_OFF;
 import static com.flurgle.camerakit.CameraKit.Constants.FOCUS_CONTINUOUS;
@@ -30,7 +26,7 @@ import static com.flurgle.camerakit.CameraKit.Constants.METHOD_STANDARD;
 import static com.flurgle.camerakit.CameraKit.Constants.METHOD_STILL;
 
 @SuppressWarnings("deprecation")
-public class Camera1 extends CameraImpl {
+class Camera1 extends CameraImpl {
 
     private static final String TAG = Camera1.class.getSimpleName();
 
@@ -50,35 +46,26 @@ public class Camera1 extends CameraImpl {
     private Camera.AutoFocusCallback mAutofocusCallback;
     private boolean capturingImage = false;
 
-    private int mDisplayOrientation;
+    private int mDisplayOffset;
+    private int mDeviceOrientation;
 
-    @Facing
+    @Facing private int mFacing;
-    private int mFacing;
+    @Flash private int mFlash;
-
+    @Focus private int mFocus;
-    @Flash
+    @Method private int mMethod;
-    private int mFlash;
+    @Zoom private int mZoom;
-
+    @VideoQuality private int mVideoQuality;
-    @Focus
-    private int mFocus;
-
-    @Method
-    private int mMethod;
-
-    @Zoom
-    private int mZoom;
-
-    @VideoQuality
-    private int mVideoQuality;
 
     private Handler mHandler = new Handler();
 
     Camera1(CameraListener callback, PreviewImpl preview) {
         super(callback, preview);
-        preview.setCallback(new PreviewImpl.Callback() {
+        preview.setCallback(new PreviewImpl.OnSurfaceChangedCallback() {
             @Override
             public void onSurfaceChanged() {
                 if (mCamera != null) {
                     setupPreview();
+                    collectCameraSizes();
                     adjustCameraParameters();
                 }
             }
@@ -105,9 +92,32 @@ public class Camera1 extends CameraImpl {
         releaseCamera();
     }
 
+    /**
+     * Sets the output stream for our preview.
+     * To be called when preview is ready.
+     */
+    private void setupPreview() {
+        try {
+            if (mPreview.getOutputClass() == SurfaceHolder.class) {
+                mCamera.setPreviewDisplay(mPreview.getSurfaceHolder());
+            } else {
+                mCamera.setPreviewTexture(mPreview.getSurfaceTexture());
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+
+    @Override
+    void onDisplayOffset(int displayOrientation) {
+        // I doubt this will ever change.
+        this.mDisplayOffset = displayOrientation;
+    }
+
     @Override
-    void setDisplayOrientation(int displayOrientation) {
+    void onDeviceOrientation(int deviceOrientation) {
-        this.mDisplayOrientation = displayOrientation;
+        this.mDeviceOrientation = deviceOrientation;
     }
 
     @Override
@@ -217,19 +227,18 @@ public class Camera1 extends CameraImpl {
             case METHOD_STANDARD:
                 // Null check required for camera here as is briefly null when View is detached
                 if (!capturingImage && mCamera != null) {
-
                     // Set boolean to wait for image callback
                     capturingImage = true;
-
+                    Camera.Parameters parameters = mCamera.getParameters();
+                    parameters.setRotation(computeExifOrientation());
+                    mCamera.setParameters(parameters);
                     mCamera.takePicture(null, null, null,
                         new Camera.PictureCallback() {
                             @Override
                             public void onPictureTaken(byte[] data, Camera camera) {
                                 mCameraListener.onPictureTaken(data);
-
                                 // Reset capturing state to allow photos to be taken
                                 capturingImage = false;
-
                                 camera.startPreview();
                             }
                         });
@@ -240,6 +249,7 @@ public class Camera1 extends CameraImpl {
                 break;
 
             case METHOD_STILL:
+                // TODO: will calculateCaptureRotation work here? It's the only usage. Test...
                 mCamera.setOneShotPreviewCallback(new Camera.PreviewCallback() {
                     @Override
                     public void onPreviewFrame(byte[] data, Camera camera) {
@@ -270,79 +280,14 @@ public class Camera1 extends CameraImpl {
         mCameraListener.onVideoTaken(mVideoFile);
     }
 
-    // Code from SandriosCamera library
-    // https://github.com/sandrios/sandriosCamera/blob/master/sandriosCamera/src/main/java/com/sandrios/sandriosCamera/internal/utils/CameraHelper.java#L218
-    public static Size getSizeWithClosestRatio(List<Size> sizes, int width, int height)
-    {
-        if (sizes == null) return null;
-
-        double MIN_TOLERANCE = 100;
-        double targetRatio = (double) height / width;
-        Size optimalSize = null;
-        double minDiff = Double.MAX_VALUE;
-
-        int targetHeight = height;
-
-        for (Size size : sizes) {
-            if (size.getWidth() == width && size.getHeight() == height)
-                return size;
-
-            double ratio = (double) size.getHeight() / size.getWidth();
-
-            if (Math.abs(ratio - targetRatio) < MIN_TOLERANCE) MIN_TOLERANCE = ratio;
-            else continue;
-
-            if (Math.abs(size.getHeight() - targetHeight) < minDiff) {
-                optimalSize = size;
-                minDiff = Math.abs(size.getHeight() - targetHeight);
-            }
-        }
-
-        if (optimalSize == null) {
-            minDiff = Double.MAX_VALUE;
-            for (Size size : sizes) {
-                if (Math.abs(size.getHeight() - targetHeight) < minDiff) {
-                    optimalSize = size;
-                    minDiff = Math.abs(size.getHeight() - targetHeight);
-                }
-            }
-        }
-        return optimalSize;
-    }
-
-    List<Size> sizesFromList(List<Camera.Size> sizes) {
-        if (sizes == null) return null;
-        List<Size> result = new ArrayList<>(sizes.size());
-
-        for (Camera.Size size : sizes) {
-            result.add(new Size(size.width, size.height));
-        }
-
-        return result;
-    }
-
-    // Code from SandriosCamera library
-    // https://github.com/sandrios/sandriosCamera/blob/master/sandriosCamera/src/main/java/com/sandrios/sandriosCamera/internal/manager/impl/Camera1Manager.java#L212
-    void initResolutions() {
-        List<Size> previewSizes = sizesFromList(mCameraParameters.getSupportedPreviewSizes());
-        List<Size> videoSizes = (Build.VERSION.SDK_INT > 10) ? sizesFromList(mCameraParameters.getSupportedVideoSizes()) : previewSizes;
-
-        CamcorderProfile camcorderProfile = getCamcorderProfile(mVideoQuality);
-
-        mCaptureSize = getSizeWithClosestRatio(
-                (videoSizes == null || videoSizes.isEmpty()) ? previewSizes : videoSizes,
-                camcorderProfile.videoFrameWidth, camcorderProfile.videoFrameHeight);
-
-        mPreviewSize = getSizeWithClosestRatio(previewSizes, mCaptureSize.getWidth(), mCaptureSize.getHeight());
-    }
 
     @Override
-    Size getCaptureResolution() {
+    Size getCaptureSize() {
         return mCaptureSize;
     }
 
     @Override
-    Size getPreviewResolution() {
+    Size getPreviewSize() {
         return mPreviewSize;
     }
 
@@ -368,24 +313,12 @@ public class Camera1 extends CameraImpl {
         mCameraParameters = mCamera.getParameters();
 
         collectCameraProperties();
+        collectCameraSizes();
         adjustCameraParameters();
-        mCamera.setDisplayOrientation(calculatePreviewRotation());
+        mCamera.setDisplayOrientation(computeCameraToDisplayOffset());
-
         mCameraListener.onCameraOpened();
     }
 
-    private void setupPreview() {
-        try {
-            if (mPreview.getOutputClass() == SurfaceHolder.class) {
-                mCamera.setPreviewDisplay(mPreview.getSurfaceHolder());
-            } else {
-                mCamera.setPreviewTexture(mPreview.getSurfaceTexture());
-            }
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
     private void releaseCamera() {
         if (mCamera != null) {
             mCamera.release();
@@ -397,48 +330,75 @@ public class Camera1 extends CameraImpl {
         }
     }
 
-    private int calculatePreviewRotation() {
+    /**
+     * Returns how much should the sensor image be rotated before being shown.
+     * It is meant to be fed to Camera.setDisplayOrientation().
+     */
+    private int computeCameraToDisplayOffset() {
         if (mCameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
-            return ((mCameraInfo.orientation - mDisplayOrientation) + 360 + 180) % 360;
+            // or: (360 - ((info.orientation + displayOrientation) % 360)) % 360;
+            return ((mCameraInfo.orientation - mDisplayOffset) + 360 + 180) % 360;
         } else {
-            return (mCameraInfo.orientation - mDisplayOrientation + 360) % 360;
+            return (mCameraInfo.orientation - mDisplayOffset + 360) % 360;
+        }
     }
+
+    /**
+     * Returns the orientation to be set as a exif tag. This is already managed by
+     * the camera APIs as long as you call {@link Camera.Parameters#setRotation(int)}.
+     */
+    private int computeExifOrientation() {
+        return (mDeviceOrientation + mCameraInfo.orientation) % 360;
     }
 
     private int calculateCaptureRotation() {
-        int previewRotation = calculatePreviewRotation();
+        int previewRotation = computeCameraToDisplayOffset();
         if (mCameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
             //Front is flipped
-            return (previewRotation + 180 + 2*mDisplayOrientation + 720) %360;
+            return (previewRotation + 180 + 2* mDisplayOffset + 720) % 360;
         } else {
             return previewRotation;
         }
     }
 
-    private void adjustCameraParameters() {
-        initResolutions();
 
-        boolean invertPreviewSizes = mDisplayOrientation%180 != 0;
+    /**
-        mPreview.setTruePreviewSize(
+     * This is called either on cameraView.start(), or when the underlying surface changes.
-                invertPreviewSizes? getPreviewResolution().getHeight() : getPreviewResolution().getWidth(),
+     * It is possible that in the first call the preview surface has not already computed its
-                invertPreviewSizes? getPreviewResolution().getWidth() : getPreviewResolution().getHeight()
+     * dimensions.
-        );
+     * But when it does, the {@link PreviewImpl.OnSurfaceChangedCallback} should be called,
+     * and this should be refreshed.
+     *
+     *
+     * TODO: either camera or video.
+     */
+    private void collectCameraSizes() {
+        List<Size> previewSizes = sizesFromList(mCameraParameters.getSupportedPreviewSizes());
+        List<Size> captureSizes = sizesFromList(mCameraParameters.getSupportedPictureSizes());
 
-        mCameraParameters.setPreviewSize(
+        /* video stuff: CamcorderProfile camcorderProfile = getCamcorderProfile(mVideoQuality);
-                getPreviewResolution().getWidth(),
+        mCaptureSize = getSizeWithClosestRatio(
-                getPreviewResolution().getHeight()
+                (videoSizes == null || videoSizes.isEmpty()) ? previewSizes : videoSizes,
-        );
+                camcorderProfile.videoFrameWidth, camcorderProfile.videoFrameHeight); */
+
+        Size surfaceSize = mPreview.getSurfaceSize();
+        mCaptureSize = Collections.max(captureSizes);
+        mPreviewSize = computePreviewSize(previewSizes, mCaptureSize, surfaceSize);
+    }
 
-        mCameraParameters.setPictureSize(
-                getCaptureResolution().getWidth(),
-                getCaptureResolution().getHeight()
-        );
-        int rotation = calculateCaptureRotation();
-        mCameraParameters.setRotation(rotation);
 
+    private void adjustCameraParameters() {
+        boolean invertPreviewSizes = mDisplayOffset % 180 != 0;
+        mPreview.setDesiredSize(
+                invertPreviewSizes? getPreviewSize().getHeight() : getPreviewSize().getWidth(),
+                invertPreviewSizes? getPreviewSize().getWidth() : getPreviewSize().getHeight()
+        );
+        mCameraParameters.setPreviewSize(getPreviewSize().getWidth(), getPreviewSize().getHeight());
+        mCameraParameters.setPictureSize(getCaptureSize().getWidth(), getCaptureSize().getHeight());
+        // int rotation = calculateCaptureRotation();
+        // mCameraParameters.setRotation(rotation);
         setFocus(mFocus);
         setFlash(mFlash);
-
         mCamera.setParameters(mCameraParameters);
     }
 
@@ -447,28 +407,6 @@ public class Camera1 extends CameraImpl {
                 mCameraParameters.getHorizontalViewAngle());
     }
 
-    private TreeSet<AspectRatio> findCommonAspectRatios(List<Camera.Size> previewSizes, List<Camera.Size> captureSizes) {
-        Set<AspectRatio> previewAspectRatios = new HashSet<>();
-        for (Camera.Size size : previewSizes) {
-            if (size.width >= CameraKit.Internal.screenHeight && size.height >= CameraKit.Internal.screenWidth) {
-                previewAspectRatios.add(AspectRatio.of(size.width, size.height));
-            }
-        }
-
-        Set<AspectRatio> captureAspectRatios = new HashSet<>();
-        for (Camera.Size size : captureSizes) {
-            captureAspectRatios.add(AspectRatio.of(size.width, size.height));
-        }
-
-        TreeSet<AspectRatio> output = new TreeSet<>();
-        for (AspectRatio aspectRatio : previewAspectRatios) {
-            if (captureAspectRatios.contains(aspectRatio)) {
-                output.add(aspectRatio);
-            }
-        }
-
-        return output;
-    }
 
     private void initMediaRecorder() {
         mMediaRecorder = new MediaRecorder();
@@ -483,7 +421,7 @@ public class Camera1 extends CameraImpl {
 
         mVideoFile = new File(mPreview.getView().getContext().getExternalFilesDir(null), "video.mp4");
         mMediaRecorder.setOutputFile(mVideoFile.getAbsolutePath());
-        mMediaRecorder.setOrientationHint(calculatePreviewRotation());
+        mMediaRecorder.setOrientationHint(computeCameraToDisplayOffset());
         mMediaRecorder.setVideoSize(mCaptureSize.getWidth(), mCaptureSize.getHeight());
     }
 
@@ -644,7 +582,7 @@ public class Camera1 extends CameraImpl {
                 if (camera != null) {
                     camera.cancelAutoFocus();
                     Camera.Parameters params = camera.getParameters();
-                    if (params.getFocusMode() != Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE) {
+                    if (!params.getFocusMode().equals(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
                         params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
                         params.setFocusAreas(null);
                         params.setMeteringAreas(null);
@@ -684,4 +622,53 @@ public class Camera1 extends CameraImpl {
         }
     }
 
+
+
+    // Size static stuff.
+
+    /**
+     * Returns a list of {@link Size} out of Camera.Sizes.
+     */
+    private static List<Size> sizesFromList(List<Camera.Size> sizes) {
+        if (sizes == null) return null;
+        List<Size> result = new ArrayList<>(sizes.size());
+        for (Camera.Size size : sizes) {
+            result.add(new Size(size.width, size.height));
+        }
+        return result;
+    }
+
+
+    /**
+     * Policy here is to return a size that is big enough to fit the surface size,
+     * and possibly consistent with the capture size.
+     * @param sizes list of possible sizes
+     * @param captureSize size representing desired aspect ratio
+     * @param surfaceSize size representing the current surface size. We'd like the returned value to be bigger.
+     * @return chosen size
+     */
+    private static Size computePreviewSize(List<Size> sizes, Size captureSize, Size surfaceSize) {
+        if (sizes == null) return null;
+
+        List<Size> consistent = new ArrayList<>(5);
+        List<Size> bigEnoughAndConsistent = new ArrayList<>(5);
+
+        final AspectRatio targetRatio = AspectRatio.of(captureSize.getWidth(), captureSize.getHeight());
+        final Size targetSize = captureSize;
+        for (Size size : sizes) {
+            AspectRatio ratio = AspectRatio.of(size.getWidth(), size.getHeight());
+            if (ratio.equals(targetRatio)) {
+                consistent.add(size);
+                if (size.getHeight() >= targetSize.getHeight() && size.getWidth() >= targetSize.getWidth()) {
+                    bigEnoughAndConsistent.add(size);
+                }
+            }
+        }
+
+        if (bigEnoughAndConsistent.size() > 0) return Collections.min(bigEnoughAndConsistent);
+        if (consistent.size() > 0) return Collections.max(consistent);
+        return Collections.max(sizes);
+    }
+
+
 }

camerakit/src/main/api21/com/flurgle/camerakit/Camera2.java

@@ -3,7 +3,6 @@ package com.flurgle.camerakit;
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.ImageFormat;
-import android.graphics.PointF;
 import android.hardware.camera2.CameraAccessException;
 import android.hardware.camera2.CameraCharacteristics;
 import android.hardware.camera2.CameraDevice;
@@ -36,7 +35,7 @@ class Camera2 extends CameraImpl {
 
     Camera2(CameraListener callback, PreviewImpl preview, Context context) {
         super(callback, preview);
-        preview.setCallback(new PreviewImpl.Callback() {
+        preview.setCallback(new PreviewImpl.OnSurfaceChangedCallback() {
             @Override
             public void onSurfaceChanged() {
 
@@ -89,7 +88,12 @@ class Camera2 extends CameraImpl {
     }
 
     @Override
-    void setDisplayOrientation(int displayOrientation) {
+    void onDisplayOffset(int displayOrientation) {
+
+    }
+
+    @Override
+    void onDeviceOrientation(int deviceOrientation) {
 
     }
 
@@ -176,7 +180,7 @@ class Camera2 extends CameraImpl {
     }
 
     @Override
-    Size getCaptureResolution() {
+    Size getCaptureSize() {
         if (mCaptureSize == null && mCameraCharacteristics != null) {
             TreeSet<Size> sizes = new TreeSet<>();
             sizes.addAll(getAvailableCaptureResolutions());
@@ -202,7 +206,7 @@ class Camera2 extends CameraImpl {
     }
 
     @Override
-    Size getPreviewResolution() {
+    Size getPreviewSize() {
         if (mPreviewSize == null && mCameraCharacteristics != null) {
             TreeSet<Size> sizes = new TreeSet<>();
             sizes.addAll(getAvailablePreviewResolutions());

camerakit/src/main/base/com/flurgle/camerakit/CameraImpl.java

@@ -15,7 +15,8 @@ abstract class CameraImpl {
     abstract void start();
     abstract void stop();
 
-    abstract void setDisplayOrientation(int displayOrientation);
+    abstract void onDisplayOffset(int displayOrientation);
+    abstract void onDeviceOrientation(int deviceOrientation);
 
     abstract void setFacing(@Facing int facing);
     abstract void setFlash(@Flash int flash);
@@ -28,8 +29,8 @@ abstract class CameraImpl {
     abstract void startVideo();
     abstract void endVideo();
 
-    abstract Size getCaptureResolution();
+    abstract Size getCaptureSize();
-    abstract Size getPreviewResolution();
+    abstract Size getPreviewSize();
     abstract boolean isCameraOpened();
 
     @Nullable

camerakit/src/main/base/com/flurgle/camerakit/PreviewImpl.java

@@ -7,20 +7,22 @@ import android.view.View;
 
 abstract class PreviewImpl {
 
-    interface Callback {
+    interface OnSurfaceChangedCallback {
         void onSurfaceChanged();
     }
 
-    private Callback mCallback;
+    private OnSurfaceChangedCallback mOnSurfaceChangedCallback;
 
-    private int mWidth;
+    // As far as I can see, these are the view/surface dimensions.
-    private int mHeight;
+    private int mSurfaceWidth;
+    private int mSurfaceHeight;
 
-    protected int mTrueWidth;
+    // As far as I can see, these are the actual preview dimensions, as set in CameraParameters.
-    protected int mTrueHeight;
+    private int mDesiredWidth;
+    private int mDesiredHeight;
 
-    void setCallback(Callback callback) {
+    void setCallback(OnSurfaceChangedCallback callback) {
-        mCallback = callback;
+        mOnSurfaceChangedCallback = callback;
     }
 
     abstract Surface getSurface();
@@ -29,12 +31,13 @@ abstract class PreviewImpl {
 
     abstract Class getOutputClass();
 
-    abstract void setDisplayOrientation(int displayOrientation);
+    protected void onDisplayOffset(int displayOrientation) {}
+    protected void onDeviceOrientation(int deviceOrientation) {}
 
     abstract boolean isReady();
 
     protected void dispatchSurfaceChanged() {
-        mCallback.onSurfaceChanged();
+        mOnSurfaceChangedCallback.onSurfaceChanged();
     }
 
     SurfaceHolder getSurfaceHolder() {
@@ -45,30 +48,37 @@ abstract class PreviewImpl {
         return null;
     }
 
-    void setSize(int width, int height) {
+    // As far as I can see, these are the view/surface dimensions.
-        mWidth = width;
+    // This is called by subclasses.
-        mHeight = height;
+    protected void setSurfaceSize(int width, int height) {
-
+        this.mSurfaceWidth = width;
-        // Refresh true preview size to adjust scaling
+        this.mSurfaceHeight = height;
-        setTruePreviewSize(mTrueWidth, mTrueHeight);
+        refreshScale(); // Refresh true preview size to adjust scaling
     }
 
-    int getWidth() {
+    // As far as I can see, these are the actual preview dimensions, as set in CameraParameters.
-        return mWidth;
+    // This is called by the CameraImpl.
+    void setDesiredSize(int width, int height) {
+        this.mDesiredWidth = width;
+        this.mDesiredHeight = height;
+        refreshScale();
     }
 
-    int getHeight() {
+    Size getSurfaceSize() {
-        return mHeight;
+        return new Size(mSurfaceWidth, mSurfaceHeight);
     }
 
-    void setTruePreviewSize(final int width, final int height) {
+    /**
-        this.mTrueWidth = width;
+     * As far as I can see, this extends either width or height of the surface,
-        this.mTrueHeight = height;
+     * to match the desired aspect ratio.
+     * This means that the external part of the surface will be cropped by the outer view.
+     */
+    protected void refreshScale() {
         getView().post(new Runnable() {
             @Override
             public void run() {
-                if (width != 0 && height != 0) {
+                if (mDesiredWidth != 0 && mDesiredHeight != 0) {
-                    AspectRatio aspectRatio = AspectRatio.of(width, height);
+                    AspectRatio aspectRatio = AspectRatio.of(mDesiredWidth, mDesiredHeight);
                     int targetHeight = (int) (getView().getWidth() * aspectRatio.toFloat());
                     float scaleY;
                     if (getView().getHeight() > 0) {
@@ -88,13 +98,4 @@ abstract class PreviewImpl {
             }
         });
     }
-
-    int getTrueWidth() {
-        return mTrueWidth;
-    }
-
-    int getTrueHeight() {
-        return mTrueHeight;
-    }
-
 }

camerakit/src/main/base/com/flurgle/camerakit/TextureViewPreview.java

@@ -13,8 +13,6 @@ class TextureViewPreview extends PreviewImpl {
 
     private final TextureView mTextureView;
 
-    private int mDisplayOrientation;
-
     TextureViewPreview(Context context, ViewGroup parent) {
         final View view = View.inflate(context, R.layout.texture_view, parent);
         mTextureView = (TextureView) view.findViewById(R.id.texture_view);
@@ -22,20 +20,20 @@ class TextureViewPreview extends PreviewImpl {
 
             @Override
             public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
-                setSize(width, height);
+                setSurfaceSize(width, height);
                 dispatchSurfaceChanged();
             }
 
             @Override
             public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
-                setSize(width, height);
+                setSurfaceSize(width, height);
                 dispatchSurfaceChanged();
-                setTruePreviewSize(mTrueWidth, mTrueHeight);
+                refreshScale();
             }
 
             @Override
             public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
-                setSize(0, 0);
+                setSurfaceSize(0, 0);
                 return true;
             }
 
@@ -45,11 +43,6 @@ class TextureViewPreview extends PreviewImpl {
         });
     }
 
-    @Override
-    void setCallback(Callback callback) {
-        super.setCallback(callback);
-    }
-
     @Override
     Surface getSurface() {
         return new Surface(mTextureView.getSurfaceTexture());
@@ -65,21 +58,11 @@ class TextureViewPreview extends PreviewImpl {
         return SurfaceTexture.class;
     }
 
-    @Override
-    void setDisplayOrientation(int displayOrientation) {
-        mDisplayOrientation = displayOrientation;
-    }
-
     @Override
     boolean isReady() {
         return mTextureView.getSurfaceTexture() != null;
     }
 
-    @Override
-    protected void dispatchSurfaceChanged() {
-        super.dispatchSurfaceChanged();
-    }
-
     @Override
     SurfaceTexture getSurfaceTexture() {
         return mTextureView.getSurfaceTexture();
@@ -87,8 +70,8 @@ class TextureViewPreview extends PreviewImpl {
 
     @TargetApi(15)
     @Override
-    void setTruePreviewSize(int width, int height) {
+    void setDesiredSize(int width, int height) {
-        super.setTruePreviewSize(width, height);
+        super.setDesiredSize(width, height);
         if (mTextureView.getSurfaceTexture() != null) {
             mTextureView.getSurfaceTexture().setDefaultBufferSize(width, height);
         }

camerakit/src/main/java/com/flurgle/camerakit/CameraKit.java

@@ -4,16 +4,9 @@ import android.content.res.Resources;
 
 public class CameraKit {
 
-    static class Internal {
-
-        static final int screenWidth = Resources.getSystem().getDisplayMetrics().widthPixels;
-        static final int screenHeight = Resources.getSystem().getDisplayMetrics().heightPixels;
-
-    }
-
     public static class Constants {
 
-        public static final int PERMISSION_REQUEST_CAMERA = 16;
+        public static final int PERMISSION_REQUEST_CODE = 16;
 
         public static final int FACING_BACK = 0;
         public static final int FACING_FRONT = 1;
@@ -35,9 +28,21 @@ public class CameraKit {
         public static final int METHOD_STILL = 1;
         public static final int METHOD_SPEED = 2;
 
-        public static final int PERMISSIONS_STRICT = 0;
+
-        public static final int PERMISSIONS_LAZY = 1;
+        /**
-        public static final int PERMISSIONS_PICTURE = 2;
+         * This means the app will be requesting Camera and Audio permissions on Marshmallow+.
+         * With this configuration, it is mandatory that the developer adds
+         *     <uses-permission android:name="android.permission.RECORD_AUDIO" />
+         * to its manifest, or the app will crash.
+         */
+        public static final int PERMISSIONS_VIDEO = 0;
+
+        /**
+         * This means the app will be requesting the Camera permissions on Marshmallow+.
+         * On older APIs, this is not important, since the Camera permission is already
+         * declared in the manifest by the library.
+         */
+        public static final int PERMISSIONS_PICTURE = 1;
 
         public static final int VIDEO_QUALITY_480P = 0;
         public static final int VIDEO_QUALITY_720P = 1;
@@ -56,7 +61,7 @@ public class CameraKit {
         static final int DEFAULT_FOCUS = Constants.FOCUS_CONTINUOUS;
         static final int DEFAULT_ZOOM = Constants.ZOOM_OFF;
         static final int DEFAULT_METHOD = Constants.METHOD_STANDARD;
-        static final int DEFAULT_PERMISSIONS = Constants.PERMISSIONS_STRICT;
+        static final int DEFAULT_PERMISSIONS = Constants.PERMISSIONS_PICTURE;
         static final int DEFAULT_VIDEO_QUALITY = Constants.VIDEO_QUALITY_480P;
 
         static final int DEFAULT_JPEG_QUALITY = 100;

camerakit/src/main/java/com/flurgle/camerakit/CameraView.java

@@ -8,6 +8,7 @@ import android.arch.lifecycle.LifecycleOwner;
 import android.arch.lifecycle.OnLifecycleEvent;
 import android.content.Context;
 import android.content.ContextWrapper;
+import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
@@ -18,12 +19,12 @@ import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
-import android.support.v4.hardware.display.DisplayManagerCompat;
-import android.support.v4.view.ViewCompat;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.view.Display;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.WindowManager;
 import android.widget.FrameLayout;
 
 import java.io.ByteArrayOutputStream;
@@ -38,9 +39,8 @@ import static com.flurgle.camerakit.CameraKit.Constants.FLASH_OFF;
 import static com.flurgle.camerakit.CameraKit.Constants.FLASH_ON;
 import static com.flurgle.camerakit.CameraKit.Constants.FLASH_TORCH;
 import static com.flurgle.camerakit.CameraKit.Constants.METHOD_STANDARD;
-import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_LAZY;
 import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_PICTURE;
-import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_STRICT;
+import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_VIDEO;
 
 /**
  * The CameraView implements the LifecycleObserver interface for ease of use. To take advantage of
@@ -58,46 +58,37 @@ import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_STRICT;
  */
 public class CameraView extends FrameLayout implements LifecycleObserver {
 
+    private final static String TAG = CameraView.class.getSimpleName();
+
     private static Handler sWorkerHandler;
 
-    static {
+    private static Handler getWorkerHandler() {
-        // Initialize a single worker thread. This can be static since only a single camera
+        if (sWorkerHandler == null) {
-        // reference can exist at a time.
             HandlerThread workerThread = new HandlerThread("CameraViewWorker");
             workerThread.setDaemon(true);
             workerThread.start();
             sWorkerHandler = new Handler(workerThread.getLooper());
         }
+        return sWorkerHandler;
+    }
 
-    @Facing
+    private void run(Runnable runnable) {
-    private int mFacing;
+        getWorkerHandler().post(runnable);
-
+    }
-    @Flash
-    private int mFlash;
-
-    @Focus
-    private int mFocus;
-
-    @Method
-    private int mMethod;
-
-    @Zoom
-    private int mZoom;
-
-    @Permissions
-    private int mPermissions;
 
-    @VideoQuality
+    @Facing private int mFacing;
-    private int mVideoQuality;
+    @Flash private int mFlash;
+    @Focus private int mFocus;
+    @Method private int mMethod;
+    @Zoom private int mZoom;
+    @Permissions private int mPermissions;
+    @VideoQuality private int mVideoQuality;
     private int mJpegQuality;
     private boolean mCropOutput;
-
     private boolean mAdjustViewBounds;
     private CameraListenerMiddleWare mCameraListener;
-
+    private OrientationHelper mOrientationHelper;
-    private DisplayOrientationDetector mDisplayOrientationDetector;
     private CameraImpl mCameraImpl;
-
     private PreviewImpl mPreviewImpl;
 
     private Lifecycle mLifecycle;
@@ -108,7 +99,6 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         init(context, null);
     }
 
-    @SuppressWarnings("all")
     public CameraView(@NonNull Context context, @Nullable AttributeSet attrs) {
         super(context, attrs);
         init(context, attrs);
@@ -117,11 +107,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     @SuppressWarnings("WrongConstant")
     private void init(@NonNull Context context, @Nullable AttributeSet attrs) {
         if (attrs != null) {
-            TypedArray a = context.getTheme().obtainStyledAttributes(
+            TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CameraView, 0, 0);
-                    attrs,
-                    R.styleable.CameraView,
-                    0, 0);
-
             try {
                 mFacing = a.getInteger(R.styleable.CameraView_ckFacing, CameraKit.Defaults.DEFAULT_FACING);
                 mFlash = a.getInteger(R.styleable.CameraView_ckFlash, CameraKit.Defaults.DEFAULT_FLASH);
@@ -149,15 +135,21 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         setFocus(mFocus);
         setMethod(mMethod);
         setZoom(mZoom);
-        setPermissions(mPermissions);
+        setPermissionPolicy(mPermissions);
         setVideoQuality(mVideoQuality);
 
         if (!isInEditMode()) {
-            mDisplayOrientationDetector = new DisplayOrientationDetector(context) {
+            mOrientationHelper = new OrientationHelper(context) {
+                @Override
+                public void onDisplayOffsetChanged(int displayOffset) {
+                    mCameraImpl.onDisplayOffset(displayOffset);
+                    mPreviewImpl.onDisplayOffset(displayOffset);
+                }
+
                 @Override
-                public void onDisplayOrientationChanged(int displayOrientation) {
+                protected void onDeviceOrientationChanged(int deviceOrientation) {
-                    mCameraImpl.setDisplayOrientation(displayOrientation);
+                    mCameraImpl.onDeviceOrientation(deviceOrientation);
-                    mPreviewImpl.setDisplayOrientation(displayOrientation);
+                    mPreviewImpl.onDeviceOrientation(deviceOrientation);
                 }
             };
 
@@ -167,7 +159,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
                 @Override
                 public boolean onTouch(View v, MotionEvent motionEvent) {
                     int action = motionEvent.getAction();
-                    if (motionEvent.getAction() == MotionEvent.ACTION_UP && mFocus == CameraKit.Constants.FOCUS_TAP_WITH_MARKER) {
+                    if (action == MotionEvent.ACTION_UP && mFocus == CameraKit.Constants.FOCUS_TAP_WITH_MARKER) {
                         focusMarkerLayout.focus(motionEvent.getX(), motionEvent.getY());
                     }
 
@@ -182,29 +174,48 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
+        Log.e(TAG, "onAttachedToWindow");
         if (!isInEditMode()) {
-            mDisplayOrientationDetector.enable(
+            Log.e(TAG, "onAttachedToWindow: enabling orientation detector.");
-                ViewCompat.isAttachedToWindow(this)
+            WindowManager manager = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
-                    ? DisplayManagerCompat.getInstance(getContext())
+            Display display = manager.getDefaultDisplay();
-                    .getDisplay(Display.DEFAULT_DISPLAY)
+            mOrientationHelper.enable(display);
-                    : null
-            );
         }
     }
 
     @Override
     protected void onDetachedFromWindow() {
+        Log.e(TAG, "onDetachedFromWindow");
         if (!isInEditMode()) {
-            mDisplayOrientationDetector.disable();
+            Log.e(TAG, "onDetachedFromWindow: disabling orientation detector.");
+            mOrientationHelper.disable();
         }
         super.onDetachedFromWindow();
     }
 
+
+    /**
+     * If {@link CameraView#mAdjustViewBounds} was set AND one of the dimensions is set to WRAP_CONTENT,
+     * CameraView will adjust that dimensions to fit the preview aspect ratio as returned by
+     * {@link #getPreviewSize()}.
+     *
+     * If this is not true, the surface will adapt to the dimension specified in the layout file.
+     * Having fixed dimensions means that, very likely, what the user sees is different from what
+     * the final picture will be. This is also due to what happens in {@link PreviewImpl#refreshScale()}.
+     */
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-        if (mAdjustViewBounds) {
+        if (!mAdjustViewBounds) {
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+            return;
+        }
+
         Size previewSize = getPreviewSize();
-            if (previewSize != null) {
+        if (previewSize == null) {
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+            return;
+        }
+
         if (getLayoutParams().width == LayoutParams.WRAP_CONTENT) {
             int height = MeasureSpec.getSize(heightMeasureSpec);
             float ratio = (float) height / (float) previewSize.getWidth();
@@ -213,7 +224,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
                     MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
                     heightMeasureSpec
             );
-                    return;
+
         } else if (getLayoutParams().height == LayoutParams.WRAP_CONTENT) {
             int width = MeasureSpec.getSize(widthMeasureSpec);
             float ratio = (float) width / (float) previewSize.getHeight();
@@ -222,17 +233,12 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
                     widthMeasureSpec,
                     MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)
             );
-                    return;
+
-                }
         } else {
             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-                return;
         }
     }
 
-        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-    }
-
     public boolean isStarted() {
         return mIsStarted;
     }
@@ -263,30 +269,29 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         stop();
     }
 
+    @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
+    public void onDestroy(LifecycleOwner owner) {
+        mLifecycle = owner.getLifecycle();
+        // This might be useless, but no time to think about it now.
+        sWorkerHandler = null;
+    }
+
     public void start() {
         if (mIsStarted || !isEnabled()) {
             // Already started, do nothing.
             return;
         }
-        mIsStarted = true;
+        checkPermissionPolicyOrThrow();
         int cameraCheck = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.CAMERA);
         int audioCheck = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.RECORD_AUDIO);
-
         switch (mPermissions) {
-            case PERMISSIONS_STRICT:
+            case PERMISSIONS_VIDEO:
                 if (cameraCheck != PackageManager.PERMISSION_GRANTED || audioCheck != PackageManager.PERMISSION_GRANTED) {
                     requestPermissions(true, true);
                     return;
                 }
                 break;
 
-            case PERMISSIONS_LAZY:
-                if (cameraCheck != PackageManager.PERMISSION_GRANTED) {
-                    requestPermissions(true, true);
-                    return;
-                }
-                break;
-
             case PERMISSIONS_PICTURE:
                 if (cameraCheck != PackageManager.PERMISSION_GRANTED) {
                     requestPermissions(true, false);
@@ -295,7 +300,8 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
                 break;
         }
 
-        sWorkerHandler.post(new Runnable() {
+        mIsStarted = true;
+        run(new Runnable() {
             @Override
             public void run() {
                 mCameraImpl.start();
@@ -325,7 +331,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     public void setFacing(@Facing final int facing) {
         this.mFacing = facing;
 
-        sWorkerHandler.post(new Runnable() {
+        run(new Runnable() {
             @Override
             public void run() {
                 mCameraImpl.setFacing(facing);
@@ -363,8 +369,13 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         mCameraImpl.setZoom(mZoom);
     }
 
-    public void setPermissions(@Permissions int permissions) {
+    /**
+     * Sets permission policy.
+     * @param permissions desired policy, either picture or video.
+     */
+    public void setPermissionPolicy(@Permissions int permissions) {
         this.mPermissions = permissions;
+        checkPermissionPolicyOrThrow();
     }
 
     public void setVideoQuality(@VideoQuality int videoQuality) {
@@ -431,12 +442,18 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         mCameraImpl.endVideo();
     }
 
+    /**
+     * Returns the size used for the preview,
+     * or null if it hasn't been computed (for example if the surface is not ready).
+     */
+    @Nullable
     public Size getPreviewSize() {
-        return mCameraImpl != null ? mCameraImpl.getPreviewResolution() : null;
+        return mCameraImpl != null ? mCameraImpl.getPreviewSize() : null;
     }
 
+    @Nullable
     public Size getCaptureSize() {
-        return mCameraImpl != null ? mCameraImpl.getCaptureResolution() : null;
+        return mCameraImpl != null ? mCameraImpl.getCaptureSize() : null;
     }
 
     private void requestPermissions(boolean requestCamera, boolean requestAudio) {
@@ -452,12 +469,10 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         List<String> permissions = new ArrayList<>();
         if (requestCamera) permissions.add(Manifest.permission.CAMERA);
         if (requestAudio) permissions.add(Manifest.permission.RECORD_AUDIO);
-
         if (activity != null) {
-            ActivityCompat.requestPermissions(
+            ActivityCompat.requestPermissions(activity,
-                    activity,
                     permissions.toArray(new String[permissions.size()]),
-                    CameraKit.Constants.PERMISSION_REQUEST_CAMERA);
+                    CameraKit.Constants.PERMISSION_REQUEST_CODE);
         }
     }
 
@@ -481,8 +496,8 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         public void onPictureTaken(byte[] jpeg) {
             super.onPictureTaken(jpeg);
             if (mCropOutput) {
-                int width = mMethod == METHOD_STANDARD ? mCameraImpl.getCaptureResolution().getWidth() : mCameraImpl.getPreviewResolution().getWidth();
+                int width = mMethod == METHOD_STANDARD ? mCameraImpl.getCaptureSize().getWidth() : mCameraImpl.getPreviewSize().getWidth();
-                int height = mMethod == METHOD_STANDARD ? mCameraImpl.getCaptureResolution().getHeight() : mCameraImpl.getPreviewResolution().getHeight();
+                int height = mMethod == METHOD_STANDARD ? mCameraImpl.getCaptureSize().getHeight() : mCameraImpl.getPreviewSize().getHeight();
                 AspectRatio outputRatio = AspectRatio.of(getWidth(), getHeight());
                 getCameraListener().onPictureTaken(new CenterCrop(jpeg, outputRatio, mJpegQuality).getJpeg());
             } else {
@@ -521,4 +536,29 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
 
     }
 
+    /**
+     * If mPermissions == PERMISSIONS_VIDEO we will ask for RECORD_AUDIO permission.
+     * If the developer did not add this to its manifest, throw and fire warnings.
+     * (Hoping this is not cought elsewhere... we should test).
+     */
+    private void checkPermissionPolicyOrThrow() {
+        if (mPermissions == PERMISSIONS_VIDEO) {
+            try {
+                PackageManager manager = getContext().getPackageManager();
+                PackageInfo info = manager.getPackageInfo(getContext().getPackageName(), PackageManager.GET_PERMISSIONS);
+                for (String requestedPermission : info.requestedPermissions) {
+                    if (requestedPermission.equals(Manifest.permission.RECORD_AUDIO)) {
+                        return;
+                    }
+                }
+                String message = "When the permission policy is PERMISSION_VIDEO, the RECORD_AUDIO permission " +
+                        "should be added to the application manifest file.";
+                Log.w(TAG, message);
+                throw new IllegalStateException(message);
+            } catch (PackageManager.NameNotFoundException e) {
+                // Not possible.
+            }
+        }
+    }
+
 }

camerakit/src/main/types/com/flurgle/camerakit/Permissions.java

@@ -5,11 +5,10 @@ import android.support.annotation.IntDef;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
-import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_LAZY;
 import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_PICTURE;
-import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_STRICT;
+import static com.flurgle.camerakit.CameraKit.Constants.PERMISSIONS_VIDEO;
 
 @Retention(RetentionPolicy.SOURCE)
-@IntDef({PERMISSIONS_STRICT, PERMISSIONS_LAZY, PERMISSIONS_PICTURE})
+@IntDef({PERMISSIONS_VIDEO, PERMISSIONS_PICTURE})
 public @interface Permissions {
 }

camerakit/src/main/utils/com/flurgle/camerakit/CommonAspectRatioFilter.java

@@ -18,10 +18,8 @@ public class CommonAspectRatioFilter {
     public TreeSet<AspectRatio> filter() {
         Set<AspectRatio> previewAspectRatios = new HashSet<>();
         for (Size size : mPreviewSizes) {
-            if (size.getWidth() >= CameraKit.Internal.screenHeight && size.getHeight() >= CameraKit.Internal.screenWidth) {
             previewAspectRatios.add(AspectRatio.of(size.getWidth(), size.getHeight()));
         }
-        }
 
         Set<AspectRatio> captureAspectRatios = new HashSet<>();
         for (Size size : mCaptureSizes) {

camerakit/src/main/utils/com/flurgle/camerakit/DisplayOrientationDetector.java

@@ -1,68 +0,0 @@
-package com.flurgle.camerakit;
-
-import android.content.Context;
-import android.util.SparseIntArray;
-import android.view.Display;
-import android.view.OrientationEventListener;
-import android.view.Surface;
-
-public abstract class DisplayOrientationDetector {
-
-    private final OrientationEventListener mOrientationEventListener;
-
-    static final SparseIntArray DISPLAY_ORIENTATIONS = new SparseIntArray();
-    static {
-        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_0, 0);
-        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_90, 90);
-        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_180, 180);
-        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_270, 270);
-    }
-
-    private Display mDisplay;
-
-    private int mLastKnownDisplayOrientation = 0;
-
-    public DisplayOrientationDetector(Context context) {
-        mOrientationEventListener = new OrientationEventListener(context) {
-
-            private int mLastKnownRotation = -1;
-
-            @Override
-            public void onOrientationChanged(int orientation) {
-                if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN || mDisplay == null) {
-                    return;
-                }
-
-                final int rotation = mDisplay.getRotation();
-                if (mLastKnownRotation != rotation) {
-                    mLastKnownRotation = rotation;
-                    dispatchOnDisplayOrientationChanged(DISPLAY_ORIENTATIONS.get(rotation));
-                }
-            }
-
-        };
-    }
-
-    public void enable(Display display) {
-        mDisplay = display;
-        mOrientationEventListener.enable();
-        dispatchOnDisplayOrientationChanged(DISPLAY_ORIENTATIONS.get(display.getRotation()));
-    }
-
-    public void disable() {
-        mOrientationEventListener.disable();
-        mDisplay = null;
-    }
-
-    public int getLastKnownDisplayOrientation() {
-        return mLastKnownDisplayOrientation;
-    }
-
-    void dispatchOnDisplayOrientationChanged(int displayOrientation) {
-        mLastKnownDisplayOrientation = displayOrientation;
-        onDisplayOrientationChanged(displayOrientation);
-    }
-
-    public abstract void onDisplayOrientationChanged(int displayOrientation);
-
-}

camerakit/src/main/utils/com/flurgle/camerakit/OrientationHelper.java

@@ -0,0 +1,81 @@
+package com.flurgle.camerakit;
+
+import android.content.Context;
+import android.hardware.SensorManager;
+import android.media.ExifInterface;
+import android.util.SparseIntArray;
+import android.view.Display;
+import android.view.OrientationEventListener;
+import android.view.Surface;
+
+abstract class OrientationHelper {
+
+    private final OrientationEventListener mOrientationEventListener;
+
+    private static final SparseIntArray DISPLAY_ORIENTATIONS = new SparseIntArray();
+    static {
+        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_0, 0);
+        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_90, 90);
+        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_180, 180);
+        DISPLAY_ORIENTATIONS.put(Surface.ROTATION_270, 270);
+    }
+
+    private Display mDisplay;
+
+    private int mLastKnownDisplayOffset = -1;
+    private int mLastOrientation = -1;
+
+    OrientationHelper(Context context) {
+        mOrientationEventListener = new OrientationEventListener(context, SensorManager.SENSOR_DELAY_NORMAL) {
+
+            @Override
+            public void onOrientationChanged(int orientation) {
+                int or = 0;
+                if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {
+                    or = 0;
+                } else if (orientation >= 315 || orientation < 45) {
+                    or = 0;
+                } else if (orientation >= 45 && orientation < 135) {
+                    or = 90;
+                } else if (orientation >= 135 && orientation < 225) {
+                    or = 180;
+                } else if (orientation >= 225 && orientation < 315) {
+                    or = 270;
+                }
+
+                if (or != mLastOrientation) {
+                    mLastOrientation = or;
+                    onDeviceOrientationChanged(mLastOrientation);
+                }
+
+                // Let's see if display rotation has changed.. but how could it ever change...??
+                // This makes no sense apparently. I'll leave it for now.
+                if (mDisplay != null) {
+                    final int offset = mDisplay.getRotation();
+                    if (mLastKnownDisplayOffset != offset) {
+                        mLastKnownDisplayOffset = offset;
+                        onDisplayOffsetChanged(DISPLAY_ORIENTATIONS.get(offset));
+                    }
+                }
+            }
+
+        };
+    }
+
+    void enable(Display display) {
+        mDisplay = display;
+        mOrientationEventListener.enable();
+        mLastKnownDisplayOffset = DISPLAY_ORIENTATIONS.get(display.getRotation());
+        onDisplayOffsetChanged(mLastKnownDisplayOffset);
+    }
+
+    void disable() {
+        mOrientationEventListener.disable();
+        mDisplay = null;
+    }
+
+    protected abstract void onDisplayOffsetChanged(int displayOffset);
+
+    protected abstract void onDeviceOrientationChanged(int deviceOrientation);
+
+}