CreateCameraView

Hello World

Content:
- Methods

CameraViews are used to access the device camera.

cam = app.CreateCameraView( width, height, options ) → app object: CameraView

You can use the “Front” option to show the front camera instead of the default back camera.

The camera needs some time to initialize first.
You can define a callback function via SetOnReady which is called if the camera can be used.
There you have to to call the StartPreview function of the CameraView control to start the preview.

Example - Show Camera Preview click to expand contents

function OnStart()
{
    lay = app.CreateLayout( "Linear", "VCenter,FillXY" );

    cam = app.CreateCameraView( 0.8, 0.4 );
    cam.SetOnReady( cam_OnReady );
    lay.AddChild( cam );

    app.AddLayout( lay );
}

function cam_OnReady() {
cam.StartPreview();
}

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The basic functionality of the camera control is taking pictures or recording video.

Example - Take pictures click to expand contents

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Example - Record Video click to expand contents

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But it provides advanced image processing functions as well. These are color reporting, motion detection and face recognision.

Example - Motion Detector click to expand contents

var sensitivity = 10; // motion threshold
var minPeriod = 500; // millisecs
var snapFolder = "/sdcard/Snaps";

function OnStart()
{
    app.SetOrientation( "Landscape" );

    lay = app.CreateLayout( "linear", "fillxy,VCenter" );

    layCam = app.CreateLayout( "Frame" );
    lay.AddChild( layCam );

    cam = app.CreateCameraView( 1, 1, "front" );
    cam.SetOnReady( StartDetection );
    layCam.AddChild( cam );

    app.AddLayout( lay );
}

function StartDetection()
{
    var w = cam.GetImageWidth();
    var h = cam.GetImageHeight();

    img = app.CreateImage( null, 1, 1, "Fix", w, h );
    img.SetAlpha( 0.5 );
    layCam.AddChild( img );

    cam.MotionMosaic( 3, 3, sensitivity, minPeriod, img );
    cam.StartPreview();
}

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More samples can be found in the samples section of DroidScript.

Methods

The following methods are available on the CameraView object:

AdjustColor( hue, saturation, brightness, contrast )

Animate( type, callback, time )

AutoCapture( path, fileName, maxCount )

Batch( properties )

ClearFocus()

FindFaces( maxCount ) → Object: { confidence, eyeDistance, midPoint:{ x, y}, pose }

Focus()

GetAbsHeight() → Number: integer

GetAbsWidth() → Number: integer

GetCameraCount() → Number: integer

GetColorEffects() → String: “none”, “mono”, “negative”, “solarize”, “sepia”, “posterize”, “whiteboard”, “blackboard”, “aqua”, “vage-cold”, “point-blue”, “point-red-yellow”, “emboss”, “sketch”, “neon”

GetHeight( options ) → Number

GetImageHeight() → Number: fraction (0..1)

GetImageWidth() → Number: fraction (0..1)

GetLeft( options ) → Number

GetMaxZoom() → Number

GetParameters() → String: semicolon “;” separated: “key1=value1;key2=value2;...”

GetParent() → app object

GetPictureSizes() → String: comma “,” separated: “w1 x h1,w2 x h2,...”

GetPixelData( format, left, top, width, height ) → String: base64 encoded

GetPosition( options ) → Object: { left, top, width, height }

GetTop( options ) → Number

GetType() → String: “CameraView”