Flash Toggle Button Crash Android

App is working fine in four different devices. but client is facing crash on flash buttton ON/OFF on Xperia z2. MainActivity btnFlash.setOnClickListener(new OnClickListener()

Solution 1:

At the request of muku. I answered it my self. for toggling flash

flashBtn.setOnClickListener(newOnClickListener()
{
    @OverridepubliconClick(View view)
    {
        if(cameraView!=null)//cameraView is the CameraPreview.class
        {
            if(cameraView.isFlashOn() && isFlashRunning)
            {       
                cameraView.FlashOff(camera);

                isFlashRunning = false;                             
            }
            else
            {
                cameraView.FlashOn(camera); 

                isFlashRunning = true;  
            }
    }
});

And FlashOn and FlashOff methods are

publicvoidFlashOn(Camera mCamera)throws RemoteException
    {   
        // Get Camera Params for customisation
        Camera.Parametersparameters= mCamera.getParameters();

        // Check Whether device supports AutoFlash, If you YES then set// AutoFlash
        List<String> flashModes = parameters.getSupportedFlashModes();

        if (flashModes.contains(android.hardware.Camera.Parameters.FLASH_MODE_TORCH))
        {
            parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);

            isFlashOn = true;
        }
        elseif (flashModes.contains(Parameters.FLASH_MODE_ON))
        {
            parameters.setFlashMode(Parameters.FLASH_MODE_ON);

            isFlashOn = true;
        }

        mCamera.setParameters(parameters);

        mCamera.startPreview();

        //mCamera.autoFocus(null);  // may be this is problem
    }



    publicvoidFlashOff(Camera mCamera)throws RemoteException
    {
        // Get Camera Params for customisation
        Camera.Parametersparameters= mCamera.getParameters();

        // Check Whether device supports AutoFlash, If you YES then set// AutoFlash
        List<String> flashModes = parameters.getSupportedFlashModes();

        if (flashModes.contains(android.hardware.Camera.Parameters.FLASH_MODE_OFF))
        {
            parameters.setFlashMode(Parameters.FLASH_MODE_OFF);

            isFlashOn = false;
        }

        mCamera.setParameters(parameters);

        mCamera.startPreview();
    }