prebuilts/gradle/GridViewPager/Wearable/src/main/java/com/example/android/wearable/gridviewpager/SampleGridPagerAdapter.java

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed 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 com.example.android.wearable.gridviewpager;

import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.support.wearable.view.CardFragment;
import android.support.wearable.view.FragmentGridPagerAdapter;
import android.support.wearable.view.ImageReference;
import android.view.Gravity;

/**
 * Constructs fragments as requested by the GridViewPager. For each row a
 * different background is provided.
 */
public class SampleGridPagerAdapter extends FragmentGridPagerAdapter {

    private final Context mContext;

    public SampleGridPagerAdapter(Context ctx, FragmentManager fm) {
        super(fm);
        mContext = ctx;
    }

    static final int[] BG_IMAGES = new int[] {
            R.drawable.debug_background_1,
            R.drawable.debug_background_2,
            R.drawable.debug_background_3,
            R.drawable.debug_background_4,
            R.drawable.debug_background_5
    };

    /** A simple container for static data in each page */
    private static class Page {
        int titleRes;
        int textRes;
        int iconRes;
        int cardGravity = Gravity.BOTTOM;
        boolean expansionEnabled = true;
        float expansionFactor = 1.0f;
        int expansionDirection = CardFragment.EXPAND_DOWN;

        public Page(int titleRes, int textRes, boolean expansion) {
            this(titleRes, textRes, 0);
            this.expansionEnabled = expansion;
        }

        public Page(int titleRes, int textRes, boolean expansion, float expansionFactor) {
            this(titleRes, textRes, 0);
            this.expansionEnabled = expansion;
            this.expansionFactor = expansionFactor;
        }

        public Page(int titleRes, int textRes, int iconRes) {
            this.titleRes = titleRes;
            this.textRes = textRes;
            this.iconRes = iconRes;
        }

        public Page(int titleRes, int textRes, int iconRes, int gravity) {
            this.titleRes = titleRes;
            this.textRes = textRes;
            this.iconRes = iconRes;
            this.cardGravity = gravity;
        }
    }

    private final Page[][] PAGES = {
            {
                    new Page(R.string.welcome_title, R.string.welcome_text, R.drawable.bugdroid,
                            Gravity.CENTER_VERTICAL),
            },
            {
                    new Page(R.string.about_title, R.string.about_text, false),
            },
            {
                    new Page(R.string.cards_title, R.string.cards_text, true, 2),
                    new Page(R.string.expansion_title, R.string.expansion_text, true, 10),
            },
            {
                    new Page(R.string.backgrounds_title, R.string.backgrounds_text, true, 2),
                    new Page(R.string.columns_title, R.string.columns_text, true, 2)
            },
            {
                    new Page(R.string.dismiss_title, R.string.dismiss_text, R.drawable.bugdroid,
                            Gravity.CENTER_VERTICAL),
            },

    };

    @Override
    public Fragment getFragment(int row, int col) {
        Page page = PAGES[row][col];
        String title = page.titleRes != 0 ? mContext.getString(page.titleRes) : null;
        String text = page.textRes != 0 ? mContext.getString(page.textRes) : null;
        CardFragment fragment = CardFragment.create(title, text, page.iconRes);
        // Advanced settings
        fragment.setCardGravity(page.cardGravity);
        fragment.setExpansionEnabled(page.expansionEnabled);
        fragment.setExpansionDirection(page.expansionDirection);
        fragment.setExpansionFactor(page.expansionFactor);
        return fragment;
    }

    @Override
    public ImageReference getBackground(int row, int column) {
        return ImageReference.forDrawable(BG_IMAGES[row % BG_IMAGES.length]);
    }

    @Override
    public int getRowCount() {
        return PAGES.length;
    }

    @Override
    public int getColumnCount(int rowNum) {
        return PAGES[rowNum].length;
    }
}