com.google.android.apps.santatracker.dasherdancer.CharacterAdapter.java Source code

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Here is the source code for com.google.android.apps.santatracker.dasherdancer.CharacterAdapter.java

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/*
 * Copyright (C) 2015 Google Inc. All Rights Reserved.
 *
 * 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.google.android.apps.santatracker.dasherdancer;

import android.support.v4.view.PagerAdapter;
import android.util.Log;
import android.util.SparseArray;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;

import java.lang.*;

public class CharacterAdapter extends PagerAdapter {

    private static final String LOG_TAG = CharacterAdapter.class.getSimpleName();

    private static final int[] mBackgrounds = new int[] { R.color.bg_blue, R.color.bg_pink, R.color.bg_purple,
            R.color.bg_green, R.color.bg_red, R.color.bg_orange, R.color.bg_yellow };

    private SparseArray<ImageView> mViews;
    private Character[] mCharacters;

    public CharacterAdapter(Character[] characters) {
        mCharacters = characters;
        mViews = new SparseArray<ImageView>();
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        if (position < mCharacters.length) {
            View view = mViews.get(position);
            if ((view == null) && (object != null)) {
                try {
                    view = (ImageView) object;
                } catch (ClassCastException e) {
                    Log.e(LOG_TAG, "Wrong type of object supplied to destroyItem.");
                }
            }

            if (view != null) {
                container.removeView(view);
            }

            mViews.remove(position);
        }
    }

    @Override
    public int getCount() {
        if (mCharacters != null) {
            return mCharacters.length;
        }
        return 0;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ImageView view = null;

        if (position < mCharacters.length) {
            if (mViews.get(position) != null) {
                view = mViews.get(position);
            } else {
                view = new FrameAnimationView(container.getContext());
                view.setScaleType(ImageView.ScaleType.CENTER_CROP);
                //Load the first idle frame.
                view.setBackgroundResource(mBackgrounds[position]);
                view.setTag(position);
                mViews.put(position, view);
            }

            LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
            container.addView(view, lp);
        }

        return view;
    }

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

}