LessonsAdapter.java

/*
 * Copyright (C) 2015 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.android.talkback.tutorial;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import com.android.talkback.R;

public class LessonsAdapter extends BaseAdapter {

    private Context mContext;
    private Tutorial mTutorial;
    private TutorialNavigationCallback mCallback;

    public LessonsAdapter(Context context, Tutorial tutorial, TutorialNavigationCallback callback) {
        mContext = context;
        mTutorial = tutorial;
        mCallback = callback;
    }

    @Override
    public int getCount() {
        return mTutorial.getLessonsCount();
    }

    @Override
    public Object getItem(int position) {
        return mTutorial.getLesson(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).
                    inflate(R.layout.tutorial_main_lesson_item, parent, false);

            ViewHolder holder = new ViewHolder();
            holder.title = (TextView) convertView.findViewById(R.id.lesson_title);
            holder.description = (TextView) convertView.findViewById(R.id.lesson_description);
            holder.practice = convertView.findViewById(R.id.practice);
            holder.startLesson = convertView.findViewById(R.id.start_lesson);

            convertView.setTag(holder);
        }

        final TutorialLesson lesson = mTutorial.getLesson(position);
        ViewHolder holder = (ViewHolder) convertView.getTag();
        holder.title.setText(lesson.getTitle());
        holder.description.setText(lesson.getShortDescription());

        holder.practice.setContentDescription(
            mContext.getString(R.string.tutorial_practice_content, position + 1));
        holder.startLesson.setContentDescription(
            mContext.getString(R.string.tutorial_start_lesson_content, position + 1));
        holder.practice.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCallback.onLessonPracticeSelected(lesson);
            }
        });
        holder.startLesson.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCallback.onLessonSelected(lesson);
            }
        });

        return convertView;
    }

    private static final class ViewHolder {
        public TextView title;
        public TextView description;
        public View startLesson;
        public View practice;
    }
}