Titan Camera

TitanCamera is Camera library for Android platform. It is build upon Camera and Camera2 API, and handles the selection of Camera API automatically based on SDK version. It solves most of the common issues faced by developer while developing in-app camera, such as Stretching of image etc.

Getting Started

This project contains titan-camera library and a tester app. To use the app you need to download the zip file or clone the repository and run the project in Android Studio. You will find MainActivity.java class in tester app where the demo code is written to help you to understand how to use titan-camera for your project.

Demo

Camera Preview	Picture Taken

Camera API

• Camera - API used on devices running below Lollipop (SDK 21)
• Camera2 - API used on and above Lollipop (SDK 21)

Features

• Easily integrateable in-app camera
• Fast and reliable
• Handles preview sizing, preview stretching, FPS rate, bitmap handing, out-of-memory errors, etc.
• Automatic selection of camera API to use
• Automatic handles if device does not have any or front camera.
• Take high-quality images
• Well tested
• Light weight

Installation

1. Download the library.

2. Import in your project. Example in Android Stuio.

 Go to:  File / New / Import Module
  
  Select the path of the library and press ok to import. Android Studio will automaticall imports and adds the module in your project.

3. Create Camera object through CameraRequestBuilder to start camera. You can start camera from Activity instance, Fragment instance, or context instance.

new CameraRequestBuilder()
                .setEnableSwitchCamera(true) //enable switch button to switch between front and back camera
                .setLensFacing(CameraProperties.LENS_FACING_BACK) //Camera to start (Front or back)
                .setCustomLayoutId(null) //Any layout that goes on top of the preview
                .build() // returns camera object
                .startCamera(context, this::onCapture) // starts camera

4. Take the result in custom callback (If you have passed so).

 @Override
    public void onCapture(@NonNull File file) {
        Toast.makeText(this, "Image received", Toast.LENGTH_SHORT).show();
    }

5. Take the result in onActivityResult.

  @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == Activity.RESULT_OK
                && requestCode == CameraRequestBuilder.REQUEST_CODE_CAMERA
                && data != null) {
            File file = (File) data.getSerializableExtra(CameraRequestBuilder.RESULT_IMAGE_FILE);
            if (file != null) {
                Toast.makeText(this, "Image received", Toast.LENGTH_SHORT).show();
            }
        }
    }

Note: You can have the result image file in CaptureResult (Callback) or onActivityResult. You can receive result in Activity's onActivityResult as well as Fragment's OnActivityResult. You should consider getting results in onActivityResult if you want to do a FragmentTransaction after receving File.

CameraRequestBuilder

Method	Descritpion
setLensFacing	Sets the camera to be used. Example, CameraProperties.LENS_FACING_BACK
setEnableSwitchCamera	Used to allow user to switch between front and back camera
setCustomLayoutId	Used to plalce and placeholder layout on the top of camera preview
setRootPath	Sets the root path where captured image will be saved. Default Picture directory of external storage
setImageFileName	Sets the name of the campture file
build	returns the Camera object used to start Camera

Camera

Method	Descritpion
startCamera	Takes context and CaptureResutlt callback where you will receive captured image
startCamera	Takes Fragment instance and sends result in Activity's onActivityResultlt
startCamera	Takes Activity instance and sends result in Activity's onActivityResultlt
startCamera	Takes Fragment instance and Bundle that you will receive back in OnActivityResult. Bundle parameter is for you to get back any local parameter that you want to retrieve back in onActivityResult and donot want to create instance variable
startCamera	Takes Activity instance and Bundle that you will receive back in OnActivityResult. Bundle parameter is for you to get back any local parameter that you want to retrieve back in onActivityResult and donot want to create instance variable

Version

1.0

Libraries used

• PhotoView - To display the captured image with sliding feature.

Author

Vinod Kumar