add captureQuality option

android/src/main/java/com/lwansbrough/RCTCamera/RCTCamera.java

@@ -59,6 +59,79 @@ public class RCTCamera {
         return cameraInfo.previewHeight;
     }
 
+    public Camera.Size getBestPreviewSize(int type, int width, int height)
+    {
+        Camera camera = _cameras.get(type);
+        Camera.Size result = null;
+        if(camera == null) {
+            return null;
+        }
+        Camera.Parameters params = camera.getParameters();
+        for (Camera.Size size : params.getSupportedPreviewSizes()) {
+            if (size.width <= width && size.height <= height) {
+                if (result == null) {
+                    result = size;
+                } else {
+                    int resultArea = result.width * result.height;
+                    int newArea = size.width * size.height;
+
+                    if (newArea > resultArea) {
+                        result = size;
+                    }
+                }
+            }
+        }
+        return result;
+    }
+
+    public Camera.Size getBestPictureSize(int type, int width, int height)
+    {
+        Camera camera = _cameras.get(type);
+        Camera.Size result = null;
+        if(camera == null) {
+            return null;
+        }
+        Camera.Parameters params = camera.getParameters();
+        for (Camera.Size size : params.getSupportedPictureSizes()) {
+            if (size.width <= width && size.height <= height) {
+                if (result == null) {
+                    result = size;
+                } else {
+                    int resultArea = result.width * result.height;
+                    int newArea = size.width * size.height;
+
+                    if (newArea > resultArea) {
+                        result = size;
+                    }
+                }
+            }
+        }
+        return result;
+    }
+
+    public Camera.Size getSmallestPictureSize(int type)
+    {
+        Camera camera = _cameras.get(type);
+        Camera.Size result = null;
+        if(camera == null) {
+            return null;
+        }
+        Camera.Parameters params = camera.getParameters();
+        for (Camera.Size size : params.getSupportedPictureSizes()) {
+            if (result == null) {
+                result = size;
+            } else {
+                int resultArea = result.width * result.height;
+                int newArea = size.width * size.height;
+
+                if (newArea < resultArea) {
+                    result = size;
+                }
+            }
+        }
+        return result;
+    }
+
     public void setOrientation(int orientation) {
         if (_orientation == orientation) {
             return;
@@ -74,6 +147,33 @@ public class RCTCamera {
         adjustPreviewLayout(RCTCameraModule.RCT_CAMERA_TYPE_BACK);
     }
 
+    public void setCaptureQuality(int cameraType, String captureQuality) {
+        Camera camera = _cameras.get(cameraType);
+        if (null == camera) {
+            return;
+        }
+
+        Camera.Parameters parameters = camera.getParameters();
+        Camera.Size pictureSize = null;
+        switch (captureQuality) {
+            case "low":
+                pictureSize = getSmallestPictureSize(cameraType); // select the lowest res
+                break;
+            case "medium":
+                List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
+                pictureSize = sizes.get(sizes.size() / 2);
+                break;
+            case "high":
+                pictureSize = getBestPictureSize(cameraType, Integer.MAX_VALUE, Integer.MAX_VALUE); // select the highest res
+                break;
+        }
+
+        if (pictureSize != null) {
+            parameters.setPictureSize(pictureSize.width, pictureSize.height);
+            camera.setParameters(parameters);
+        }
+    }
+
     public void setTorchMode(int cameraType, int torchMode) {
         Camera camera = _cameras.get(cameraType);
         if (null == camera) {
@@ -150,8 +250,10 @@ public class RCTCamera {
         parameters.setRotation(cameraInfo.rotation);
 
         // set preview size
-        int width = parameters.getSupportedPreviewSizes().get(0).width;
-        int height = parameters.getSupportedPreviewSizes().get(0).height;
+        // defaults to highest resolution available
+        Camera.Size optimalPreviewSize = getBestPreviewSize(type, Integer.MAX_VALUE, Integer.MAX_VALUE);
+        int width = optimalPreviewSize.width;
+        int height = optimalPreviewSize.height;
 
         parameters.setPreviewSize(width, height);
         try {

android/src/main/java/com/lwansbrough/RCTCamera/RCTCameraView.java

@@ -17,6 +17,7 @@ public class RCTCameraView extends ViewGroup {
     private RCTCameraViewFinder _viewFinder = null;
     private int _actualDeviceOrientation = -1;
     private int _aspect = RCTCameraModule.RCT_CAMERA_ASPECT_FIT;
+    private String _captureQuality = "high";
     private int _torchMode = -1;
     private int _flashMode = -1;
 
@@ -66,6 +67,13 @@ public class RCTCameraView extends ViewGroup {
         }
     }
 
+    public void setCaptureQuality(String captureQuality) {
+        this._captureQuality = captureQuality;
+        if (this._viewFinder != null) {
+            this._viewFinder.setCaptureQuality(captureQuality);
+        }
+    }
+
     public void setTorchMode(int torchMode) {
         this._torchMode = torchMode;
         if (this._viewFinder != null) {

android/src/main/java/com/lwansbrough/RCTCamera/RCTCameraViewFinder.java

@@ -65,6 +65,10 @@ class RCTCameraViewFinder extends TextureView implements TextureView.SurfaceText
         }).start();
     }
 
+    public void setCaptureQuality(String captureQuality) {
+        RCTCamera.getInstance().setCaptureQuality(_cameraType, captureQuality);
+    }
+
     public void setTorchMode(int torchMode) {
         RCTCamera.getInstance().setTorchMode(_cameraType, torchMode);
     }
@@ -91,10 +95,16 @@ class RCTCameraViewFinder extends TextureView implements TextureView.SurfaceText
             try {
                 _camera = RCTCamera.getInstance().acquireCameraInstance(_cameraType);
                 Camera.Parameters parameters = _camera.getParameters();
+                // set autofocus
                 List<String> focusModes = parameters.getSupportedFocusModes();
                 if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
                     parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
                 }
+                // set picture size
+                // defaults to max available size
+                Camera.Size optimalPictureSize = RCTCamera.getInstance().getBestPictureSize(_cameraType, Integer.MAX_VALUE, Integer.MAX_VALUE);
+                parameters.setPictureSize(optimalPictureSize.width, optimalPictureSize.height);
+
                 _camera.setParameters(parameters);
                 _camera.setPreviewTexture(_surfaceTexture);
                 _camera.startPreview();

android/src/main/java/com/lwansbrough/RCTCamera/RCTCameraViewManager.java

@@ -37,6 +37,11 @@ public class RCTCameraViewManager extends ViewGroupManager<RCTCameraView> {
         view.setCameraType(type);
     }
 
+    @ReactProp(name = "captureQuality")
+    public void setCaptureQuality(RCTCameraView view, String captureQuality) {
+        view.setCaptureQuality(captureQuality);
+    }
+
     @ReactProp(name = "torchMode")
     public void setTorchMode(RCTCameraView view, int torchMode) {
         view.setTorchMode(torchMode);