Android Open Source - SimpleReader Guide Activity

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Back to project page SimpleReader.
License

The source code is released under:
Apache License
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Java Source Code

package com.dreamteam.app.ui;
/*from w  w  w. ja  va 2s  .co  m*/
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.dreamteam.app.adapter.GuideViewPagerAdapter;
import com.dreamteam.app.commons.AppConfig;
import com.dreamteam.app.commons.AppContext;
import com.dreamteam.app.db.FeedDBManager;
import com.dreateam.app.ui.R;

/**
 * 
 * @{# GuideActivity.java Create on 2013-5-2 ????10:59:08
 * 
 *     class desc: ?????????????????
 * 
 *     <p>
 *     Copyright: Copyright(c) 2013
 *     </p>
 * @Version 1.0
 * @Author <a href="mailto:gaolei_xj@163.com">Leo</a>
 * 
 * 
 */
public class GuideActivity extends Activity implements OnPageChangeListener
{
  private ViewPager vp;
  private GuideViewPagerAdapter vpAdapter;
  private List<View> views;

  // ???????
  private ImageView[] dots;

  // ??????????
  private int currentIndex;

  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.guide);

    // ????????
    initViews();

    // ?????????
    initDots();
    writeDB();
    //???????????
    writeSaveDaysFile();
    //??????????
    AppContext.clearSdCache();
  }

  private void writeSaveDaysFile()
  {
    String fileName = getFilesDir().getAbsolutePath() + File.separator 
        + AppConfig.PREF_DEPRECATED;
    File file = new File(fileName);
    try
    {
      file.createNewFile();
    } catch (IOException e)
    {
      e.printStackTrace();
    }
  }

  private void writeDB()
  {
    InputStream inputStream = null;
    try
    {
      inputStream = getAssets().open("feed.db");
      FeedDBManager helper = new FeedDBManager(this, FeedDBManager.DB_NAME, null, 1);
      SQLiteDatabase db = helper.getWritableDatabase();
      File dbFile = new File(db.getPath());
      if(dbFile.exists())
      {
        dbFile.delete();
      }
      FileOutputStream fos = null;
      
      try
      {
        fos = new FileOutputStream(dbFile);
        byte buffer[] = new byte[1024 * 4];
        while((inputStream.read(buffer)) != -1)
        {
          fos.write(buffer);
        }
      }
      catch(FileNotFoundException e)
      {
        e.printStackTrace();
      }
      catch(IOException e)
      {
        e.printStackTrace();
      }
      finally
      {
        try
        {
          if(inputStream != null)
          {
            inputStream.close();
            inputStream = null;
          }
          if(fos != null)
          {
            fos.close();
            fos = null;
          }
        } catch (IOException e)
        {
          e.printStackTrace();
        }
        db.close();
      }
    }
    catch(IOException e)
    {
      e.printStackTrace();
    }
  }

  private void initViews()
  {
    LayoutInflater inflater = LayoutInflater.from(this);

    views = new ArrayList<View>();
    // ??????????
    views.add(inflater.inflate(R.layout.what_new_one, null));
    views.add(inflater.inflate(R.layout.what_new_two, null));
    views.add(inflater.inflate(R.layout.what_new_three, null));
    views.add(inflater.inflate(R.layout.what_new_four, null));

    // ????Adapter
    vpAdapter = new GuideViewPagerAdapter(views, this);

    vp = (ViewPager) findViewById(R.id.viewpager);
    vp.setAdapter(vpAdapter);
    // ????
    vp.setOnPageChangeListener(this);
  }

  private void initDots()
  {
    LinearLayout ll = (LinearLayout) findViewById(R.id.ll);

    dots = new ImageView[views.size()];

    // ???????????
    for (int i = 0; i < views.size(); i++)
    {
      dots[i] = (ImageView) ll.getChildAt(i);
      dots[i].setEnabled(true);// ???????
    }

    currentIndex = 0;
    dots[currentIndex].setEnabled(false);// ??????????????
  }

  private void setCurrentDot(int position)
  {
    if (position < 0 || position > views.size() - 1
        || currentIndex == position)
    {
      return;
    }

    dots[position].setEnabled(false);
    dots[currentIndex].setEnabled(true);

    currentIndex = position;
  }

  // ?????????????
  @Override
  public void onPageScrollStateChanged(int arg0)
  {
  }

  // ??????????????
  @Override
  public void onPageScrolled(int arg0, float arg1, int arg2)
  {
  }

  // ?????????????
  @Override
  public void onPageSelected(int arg0)
  {
    // ????????????
    setCurrentDot(arg0);
  }

}
Java Source Code List
