co.bytera.twodimensionalviewpager.fragment.TwoDimensionalViewPagerFragment.java Source code

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Here is the source code for co.bytera.twodimensionalviewpager.fragment.TwoDimensionalViewPagerFragment.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package co.bytera.twodimensionalviewpager.fragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import co.bytera.twodimensionalviewpager.R;
import co.bytera.twodimensionalviewpager.adapter.DepthPageTransformer;
import co.bytera.twodimensionalviewpager.adapter.TwoDimensionalViewPagerAdapter;

public class TwoDimensionalViewPagerFragment extends Fragment {

    protected static final String TAG = "BaseFragment";

    protected ViewPager viewPager;
    protected TwoDimensionalViewPagerAdapter adapter;

    /*
     * Image data is 2-D array (even though array is ragged, it works fine)
     * Following images are included only for demonstration purpose.
     */
    private int[][] images = new int[][] {
            { R.drawable.bmw, R.drawable.linux, R.drawable.motorcycle, R.drawable.lovato },
            { R.drawable.mario, R.drawable.sponzebob, R.drawable.rose },
            { R.drawable.cyrus, R.drawable.elphi, R.drawable.apple, R.drawable.basketball, R.drawable.elphi2 } };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_layout, container, false);

        viewPager = (ViewPager) v.findViewById(R.id.viewPager);

        /*
         * To detect the gesture (UP/DOWN/LEFT/RIGHT)
         */
        final GestureDetector gesture = new GestureDetector(getActivity(),
                new GestureDetector.SimpleOnGestureListener() {
                    @Override
                    public boolean onDown(MotionEvent e) {
                        return true;
                    }

                    @Override
                    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                        final int SWIPE_MIN_DISTANCE = 120;
                        final int SWIPE_MAX_OFF_PATH = 250;
                        final int SWIPE_THRESHOLD_VELOCITY = 200;

                        try {
                            if (e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE
                                    && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
                                /*
                                 * finger motion is UP side.  page is moving to next row
                                 */
                                adapter.nextRow();
                                adapter.notifyDataSetChanged();
                            } else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE
                                    && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
                                /*
                                 * finger motion is DOWN side.  page is moving to previous row
                                 */
                                adapter.previousRow();
                                adapter.notifyDataSetChanged();
                            } else if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
                                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                                /*
                                 * more action can be done here
                                 */

                            } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
                                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                                /*
                                 * more action can be done here
                                 */

                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }

                        return super.onFling(e1, e2, velocityX, velocityY);
                    }
                });

        /*
         *  set on touch listener to the viewPager
         */
        viewPager.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {

                return gesture.onTouchEvent(event);
            }
        });

        return v;
    }

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

        adapter = new TwoDimensionalViewPagerAdapter(getActivity());
        adapter.setData(images);
        viewPager.setAdapter(adapter);
        viewPager.setPageTransformer(false, new DepthPageTransformer());
    }

}