co.bytera.twodimensionalviewpager.adapter.TwoDimensionalViewPagerAdapter.java Source code

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Here is the source code for co.bytera.twodimensionalviewpager.adapter.TwoDimensionalViewPagerAdapter.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.adapter;

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import co.bytera.twodimensionalviewpager.R;

public class TwoDimensionalViewPagerAdapter extends PagerAdapter {

    /*
     *  For the demonstration purpose, 2-D of resource(integer) array is used.
     *  However, any types of data are able to be set.
     *  Array can be ragged as well.
     */
    private int[][] data = new int[0][0];
    private Context context;
    private int rowNumber = 0;

    /*
     *  Constructor: inject context here
     */
    public TwoDimensionalViewPagerAdapter(Context context) {
        this.context = context;
    }

    /*
     *  Set 2-D data
     */
    public void setData(int[][] data) {
        this.data = data;
    }

    /*
     *  Move page to the next row
     */
    public void nextRow() {
        if (rowNumber < data.length - 1)
            rowNumber++;
    }

    /*
     *  Move page to the previous row
     */
    public void previousRow() {
        if (rowNumber > 0)
            rowNumber--;
    }

    /*
     * getCount() returns the number of items in the current row.
     */
    @Override
    public int getCount() {
        return data[rowNumber].length;
    }

    /*
     * Important: getItemPosition returns POSITION_NONE
     *    Otherwise, it PagerAdapter won't respond to the notifyDataSetChanged()
     */
    @Override
    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {

        @SuppressWarnings("static-access")
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);

        /*
         * Layout is created from xml here, but it can be done by java coding as well
         */
        View view = inflater.inflate(R.layout.view_page, null);

        TextView textView = (TextView) view.findViewById(R.id.textView1);
        textView.setText(rowNumber + ", " + position);

        ImageView imageView = (ImageView) view.findViewById(R.id.imageView1);
        imageView.setImageResource(data[rowNumber][position]);

        container.addView(view);

        return view;
    }

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        return arg0 == ((View) arg1);
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }
}