Android Open Source - Quiz Levels Adapter

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright (c) 2013, Maciej Laskowski. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 */*from  www  .  ja  v  a  2s. co  m*/
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  
 * 
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact mlaskowsk@gmail.com if you need additional information
 * or have any questions.
 */

package com.mlaskows.quiz.adapter;

import java.util.List;

import roboguice.RoboGuice;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.google.inject.Inject;
import com.mlaskows.quiz.R;
import com.mlaskows.quiz.activity.ExerciseActivity;
import com.mlaskows.quiz.model.dao.LevelDao;
import com.mlaskows.quiz.model.entity.Level;

/**
 * Levels list adapter.
 * 
 * @author Maciej Laskowski
 * 
 */
public class LevelsAdapter extends ArrayAdapter<Level> {

  /** Application context. */
  private Context context;

  /** List of levels. */
  private List<Level> levels;

  /** Resource id. */
  private int resource;

  /** DAO for level. */
  @Inject
  private LevelDao levelDao;

  /**
   * {@link LevelsAdapter} constructor
   * 
   * @param context
   *            app context
   * @param resource
   *            resource id
   * @param levels
   *            levels list
   */
  public LevelsAdapter(Context context, int resource, List<Level> levels) {
    super(context, resource, levels);
    this.context = context;
    this.levels = levels;
    this.resource = resource;
    /* Inject manually since only RoboActivity can
    do it by itself. */
    RoboGuice.injectMembers(context, this);
  }

  /* (non-Javadoc)
   * @see android.widget.ArrayAdapter#getView(int, android.view.View, android.view.ViewGroup)
   */
  @SuppressWarnings("deprecation")
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    LevelHolder holder = null;

    // Determine if level should be locked.
    if (!levels.get(position).isUnlocked()) {
      if (position < 1) {
        levels.get(position).setUnlocked(true);
      } else {
        if (levels.get(position - 1).getProgress() == 100) {
          levels.get(position).setUnlocked(true);
        }
      }
      if (levels.get(position).isUnlocked()) {
        levelDao.update(levels.get(position));
      }
    }

    if (row == null) {
      LayoutInflater inflater = ((Activity) context).getLayoutInflater();
      row = inflater.inflate(resource, parent, false);
      holder = new LevelHolder();
      holder.setProgressBar((ProgressBar) row.findViewById(R.id.progressBarLevel));
      holder.setTxtTitle((TextView) row.findViewById(R.id.textLevel));
      holder.setLocked((ImageView) row.findViewById(R.id.imageLevelLock));
      row.setTag(holder);
      // Set custom background for row
      row.setBackgroundDrawable((getContext().getResources().getDrawable(R.drawable.button_main)));
      // Set listener
      row.setOnClickListener(new OnClickRow(position + 1, levels.get(position).isUnlocked()));
    } else {
      holder = (LevelHolder) row.getTag();
    }
    
    // Set level info
    Level level = levels.get(position);
    holder.getTxtTitle().setText(level.getName());
    if (levels.get(position).isUnlocked()) {
      holder.getLocked().setImageResource(R.drawable.open);
    }
    holder.getProgressBar().setProgress(level.getProgress());

    return row;
  }

  /**
   * Holder for {@link Level} element
   */
  private static class LevelHolder {

    /** Level title. */
    private TextView txtTitle;

    /** Level progress bar. */
    private ProgressBar progressBar;

    /** Locked icon. */
    private ImageView locked;

    public TextView getTxtTitle() {
      return txtTitle;
    }

    public void setTxtTitle(TextView txtTitle) {
      this.txtTitle = txtTitle;
    }

    public ImageView getLocked() {
      return locked;
    }

    public void setLocked(ImageView locked) {
      this.locked = locked;
    }

    public ProgressBar getProgressBar() {
      return progressBar;
    }

    public void setProgressBar(ProgressBar progressBar) {
      this.progressBar = progressBar;
    }

  }

  /**
   * {@link OnClickListener} binded to level item on
   * levels list. Should start {@link ExerciseActivity}.
   */
  private class OnClickRow implements View.OnClickListener {

    /** Bundle to start new {@link ExerciseActivity}. */
    private Bundle b;

    /** Determines if level is unlocked. */
    private boolean unlocked;

    /**
     * OnClickRow constructor.
     * 
     * @param levelId
     *            id of level which question must
     *            displayed.
     * @param unlocked
     *            is level unlocked
     */
    public OnClickRow(int levelId, boolean unlocked) {
      b = new Bundle();
      b.putInt("level_id", levelId);
      this.unlocked = unlocked;
    }

    /* (non-Javadoc)
     * @see android.view.View.OnClickListener#onClick(android.view.View)
     */
    @Override
    public void onClick(View v) {
      if (unlocked) {
        Intent intent = new Intent(getContext(), ExerciseActivity.class);
        intent.putExtras(b);
        getContext().startActivity(intent);
      }
    }

  }

}

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