FastSnapshot Wrapper

package de.tionsys.fastshot;

import android.hardware.Camera;
import android.hardware.Camera.Size;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;

public class FastSnapshotPreview
{
    Camera cam = null;
    SurfaceView view = null;
    SurfaceHolder holder = null;

    public FastSnapshotPreview(Camera camera, SurfaceView sfv)
    {
        cam = camera;
        view = sfv;
        holder = sfv.getHolder();
        holder.addCallback(callback);
    }

    private void initPreview(int width, int height)
    {
        if(cam == null || holder.getSurface() == null) return;
        try
        {
            cam.setPreviewDisplay(holder);
            Camera.Parameters parameters = cam.getParameters();
            Size result = null;
            for (Size size : parameters.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;
                        }
                    }
                }
            }

            if (result != null)
            {
                Toast.makeText(FastSnapshotActivity.master, "Parameter werden gesetzt !", 5).show();
                parameters.setPreviewSize(result.width, result.height);
                cam.setParameters(parameters);
            }
        }
        catch (Throwable t)
        {
            // do nothings;
        }
    }

    private void startLivePreview()
    {
        if(cam == null) return;
        cam.startPreview();
    }

    SurfaceHolder.Callback callback = new SurfaceHolder.Callback()
    {
        public void surfaceCreated(SurfaceHolder holder)
        {
            // do nothings;
        }

        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
        {
            initPreview(width, height);
            startLivePreview();
        }

        public void surfaceDestroyed(SurfaceHolder holder)
        {
            // do nothings;
        }
      };
}