CameraView/docs/_posts/2018-12-20-more-features.md

layout	title	subtitle	description	category	order	date	disqus
page	More features	Undocumented features & more	Undocumented features & more	docs	13	2018-12-20 20:41:20	1

Extra controls

<com.otaliastudios.cameraview.CameraView
    app:cameraPlaySounds="true|false"
    app:cameraGrid="off|draw3x3|draw4x4|drawPhi"
    app:cameraGridColor="@color/black"
    app:cameraAutoFocusResetDelay="0"
    app:cameraUseDeviceOrientation="true"/>

cameraPlaySounds

Controls whether we should play platform-provided sounds during certain events (shutter click, focus completed). Please note that:

• on API < 16, this flag is always set to false
• the Camera1 engine will always play shutter sounds regardless of this flag

Defaults to true.

cameraView.setPlaySounds(true);
cameraView.setPlaySounds(false);

cameraGrid

Lets you draw grids over the camera preview. Supported values are off, draw3x3 and draw4x4 for regular grids, and drawPhi for a grid based on the golden ratio constant, often used in photography. Defaults to OFF.

cameraView.setGrid(Grid.OFF);
cameraView.setGrid(Grid.DRAW_3X3);
cameraView.setGrid(Grid.DRAW_4X4);
cameraView.setGrid(Grid.DRAW_PHI);

cameraGridColor

Lets you choose the color for grid lines. Defaults to a shade of grey.

cameraView.setGridColor(Color.WHITE);
cameraView.setGridColor(Color.BLACK);

cameraAutoFocusMarker

Lets you set a marker for drawing on screen in response to auto focus events. In XML, you should pass the qualified class name of your marker.

cameraView.setAutoFocusMarker(null);
cameraView.setAutoFocusMarker(marker);

We offer a default marker (similar to the old focusWithMarker attribute in v1), which you can set in XML using the @string/cameraview_default_autofocus_marker resource, or programmatically:

cameraView.setAutoFocusMarker(new DefaultAutoFocusMarker());

cameraAutoFocusResetDelay

Lets you control how an auto-focus operation is reset after completed. Setting a value <= 0 or == Long.MAX_VALUE will not reset the auto-focus. This is useful for low end devices that have slow auto-focus capabilities. Defaults to 3 seconds.

cameraView.setCameraAutoFocusResetDelay(1000);  // 1 second
cameraView.setCameraAutoFocusResetDelay(0);  // NO reset
cameraView.setCameraAutoFocusResetDelay(-1);  // NO reset
cameraView.setCameraAutoFocusResetDelay(Long.MAX_VALUE);  // NO reset

cameraUseDeviceOrientation

Controls whether we should consider the device orientation for picture and video outputs. This defaults to true, but can be set to false for specific usages, where you don't want the output to be rotated based on the device rotation at the moment of capturing. Defaults to true.

cameraView.setUseDeviceOrientation(true); // rotate media 
cameraView.setUseDeviceOrientation(false); // don't

UI Orientation

Within a Camera app, it's common to rotate buttons and other UI elements as the device is tilted around. We offer a handy callback giving you the right rotation that should be applied to UI elements for them to be consistent with what the user is seeing:

cameraView.addCameraListener(new CameraListener() {
    @Override
    public void onOrientationChanged(int orientation) {
        // orientation is the counter-clockwise rotation that a View should have
        // based on current device tilting and native activity orientation.
    }
});

Location APIs

You can plug in location tags into picture EXIF (for JPEGs) and video metadata by simply using setLocation. The location can be obtained from any location provider after getting appropriate permissions. This is not guaranteed to be appended into snapshots.

Method	Description
setLocation(Location)	Sets location data to be appended to picture/video metadata.
setLocation(double, double)	Sets latitude and longitude to be appended to picture/video metadata.
getLocation()	Retrieves location data previously applied with setLocation().

Undocumented features

Some features and APIs were not documented in this document, including:

• CameraUtils utilities
• CameraOptions options

For informations, please take a look at the javadocs or the source code.