ImageCapture

package com.example.pial_pc.instantbookreview;

import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.hardware.Camera;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.ImageButton;
import android.widget.Toast;

import com.example.pial_pc.instantbookreview.bitmapProcess.Tools;
import com.example.pial_pc.instantbookreview.imageCapture.FocusBoxView;

import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.core.Size;
import org.opencv.imgproc.Imgproc;

import java.io.File;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Created by Pial-PC on 1/19/2016.
 */
public class ImageCapture extends ActionBarActivity implements SurfaceHolder.Callback {
    SurfaceView camera_frame;
    ImageButton shutter, focus;
    Camera.PictureCallback rawPictureCallback, jpegPictureCallback;
    Camera.ShutterCallback shutterCallback;
    Camera camera;
    FocusBoxView focusBox;
    Mat imageMat;
    Bitmap bmp;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_image_capture);
        getSupportActionBar().hide();

        camera_frame = (SurfaceView) findViewById(R.id.camera_frame);
        shutter = (ImageButton) findViewById(R.id.shutter_button);
        focus = (ImageButton) findViewById(R.id.focus_button);
        focusBox=(FocusBoxView)findViewById(R.id.focus_box);
        SurfaceHolder surfaceHolder = camera_frame.getHolder();
        surfaceHolder.addCallback(this);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        shutter.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //This code is for mute Camera shutter sound

                Camera.CameraInfo info = new Camera.CameraInfo();
                for (int id = 0; id < Camera.getNumberOfCameras(); id++) {
                    Camera.getCameraInfo(id, info);
                    if (info.canDisableShutterSound) {
                        camera.enableShutterSound(false);
                    }
                }

                camera.takePicture(shutterCallback, rawPictureCallback, jpegPictureCallback);
            }
        });

        focus.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Camera.AutoFocusCallback autoFocusCallback=new Camera.AutoFocusCallback() {
                    @Override
                    public void onAutoFocus(boolean b, Camera camera) {

                    }
                };

                camera.autoFocus(autoFocusCallback);
            }
        });

        jpegPictureCallback = new Camera.PictureCallback() {
            @Override
            public void onPictureTaken(byte[] bytes, Camera camera) {

                if (bytes == null) {
                    Log.d("OCR", "Got null data");
                    return;
                }


                 bmp= Tools.getFocusedBitmap(getApplicationContext(), camera, bytes, focusBox.getBox());
                bmp.setDensity(300);

                //This below code is for image processing using openCV.
                imageMat=new Mat();
                Utils.bitmapToMat(bmp, imageMat);
                Imgproc.cvtColor(imageMat, imageMat, Imgproc.COLOR_BGR2GRAY);
                Imgproc.GaussianBlur(imageMat, imageMat, new Size(3, 3), 0);
                Imgproc.adaptiveThreshold(imageMat, imageMat, 255, Imgproc.ADAPTIVE_THRESH_MEAN_C, Imgproc.THRESH_BINARY_INV, 5, 4);

                //Saving Bitmap to sdcard
                File checkingFileDir=new File(Environment.getExternalStorageDirectory()+"Inastant_Book_Reviwer/");
                if(!checkingFileDir.exists()){
                    checkingFileDir.mkdir();
                }
                String timeStamp = new SimpleDateFormat("ddMMyyyy").format(new Date());
                File imageFile;
                String mImageName="Image_"+ timeStamp +".jpg";
                imageFile = new File(checkingFileDir.getPath() + File.separator + mImageName);

                try{
                    FileOutputStream outImage=new FileOutputStream(imageFile);
                    bmp.compress(Bitmap.CompressFormat.PNG,90,outImage);
                    outImage.close();
                }catch (Exception e){
                    e.printStackTrace();
                }


                OCR_Image ocr_image=new OCR_Image();
                ocr_image.execute(ImageCapture.this,bmp);

                Log.d("OCR", "Got bitmap");


            }
        };

        shutterCallback = new Camera.ShutterCallback() {
            @Override
            public void onShutter() {

            }
        };

    }

    @Override
    public void surfaceCreated(SurfaceHolder surfaceHolder) {
        try {
            //This checks if a device has a camera or not
            if (getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
                // this device has a camera
                camera = Camera.open();
            } else {
                // no camera on this device
                Toast.makeText(getApplicationContext(), "Your device doesn't have a Camera.", Toast.LENGTH_SHORT).show();
            }
            camera.setPreviewDisplay(surfaceHolder);
            camera.setDisplayOrientation(90);
            camera.startPreview();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder surfaceHolder) {

    }

    @Override
    public void onPause() {
        super.onPause();

        if (camera != null) {
            camera.release();
        }

        SurfaceHolder surfaceHolder = camera_frame.getHolder();
        surfaceHolder.removeCallback(this);

    }
}