MainActivity.java

package yv.recipe;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ImageView;

import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;

import java.io.File;

import yv.recipe.adapters.ViewPagerAdapter;
import yv.recipe.layouts.SlidingTabLayout;


public class MainActivity extends ActionBarActivity {

    // Declaring Your View and Variables

    Toolbar toolbar;
    ViewPager pager;
    ViewPagerAdapter adapter;
    SlidingTabLayout tabs;
    ImageButton FAB;
    CharSequence Titles[] = {"Recipes", "Popular"};
    int Numboftabs = 2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);


        toolbar = (Toolbar) findViewById(R.id.tool_bar);
        setSupportActionBar(toolbar);


        adapter =  new ViewPagerAdapter(getSupportFragmentManager(), Titles, Numboftabs);

        pager = (ViewPager) findViewById(R.id.pager);
        pager.setAdapter(adapter);

        tabs = (SlidingTabLayout) findViewById(R.id.tabs);
        tabs.setDistributeEvenly(true);

        tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
            @Override
            public int getIndicatorColor(int position) {
                return getResources().getColor(R.color.tabsScrollColor);
            }
        });

        FAB = (ImageButton) findViewById(R.id.imageButton);
        FAB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                selectImage();

            }
        });

        // Setting the ViewPager For the SlidingTabsLayout
        tabs.setViewPager(pager);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();

        // case camera icon clicked
//        if (id == R.id.action_camera) {
//            selectImage();
//        }

        return super.onOptionsItemSelected(item);
    }

    private void selectImage() {

        final CharSequence[] options = { "Take Photo", "Choose from Gallery", "Cancel" };

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Add Photo To Start!");
        builder.setItems(options, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int item) {
                if (options[item].equals("Take Photo"))
                {
                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    File f = new File(android.os.Environment.getExternalStorageDirectory(), "temp.jpg");
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
                    startActivityForResult(intent, 1);
                }
                else if (options[item].equals("Choose from Gallery"))
                {
                    Intent intent = new   Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    startActivityForResult(intent, 2);

                }
                else if (options[item].equals("Cancel")) {
                    dialog.dismiss();
                }
            }
        });
        builder.show();
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        ImageView viewImage = (ImageView) findViewById(R.id.image_placeholder);
        ImageView analyzeIcon = (ImageView) findViewById(R.id.analyze_icon);

        if (resultCode == RESULT_OK) {
            if (requestCode == 1) {
                File f = new File(Environment.getExternalStorageDirectory().toString());
                for (File temp : f.listFiles()) {
                    if (temp.getName().equals("temp.jpg")) {
                        f = temp;
                        break;
                    }
                }
                try {
                    Bitmap bitmap;
                    BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();

                    bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(), bitmapOptions);

                    viewImage.setImageBitmap(bitmap);
                    viewImage.setBackgroundResource(R.drawable.shape_view_border);
                    analyzeIcon.setVisibility(View.VISIBLE);


                } catch (Exception e) {
                    e.printStackTrace();
                }
            } else if (requestCode == 2) {

                Uri selectedImage = data.getData();
                String[] filePath = { MediaStore.Images.Media.DATA };
                Cursor c = getContentResolver().query(selectedImage,filePath, null, null, null);
                c.moveToFirst();
                int columnIndex = c.getColumnIndex(filePath[0]);
                String picturePath = c.getString(columnIndex);
                c.close();
                Bitmap thumbnail = (BitmapFactory.decodeFile(picturePath));
//                Log.w("path of image from gallery", picturePath + "");
                viewImage.setImageBitmap(thumbnail);
                analyzeIcon.setVisibility(View.VISIBLE);
            }
        }
    }

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

        OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_11, this, mLoaderCallback);
    }

    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
        @Override
        public void onManagerConnected(int status) {
            switch (status) {
                case LoaderCallbackInterface.SUCCESS:
                {
                    Log.i("opencv", "opencv success");
                } break;
                default:
                {
                    super.onManagerConnected(status);
                } break;
            }
        }
    };
}