Android Open Source - RadaeePDF-B4A Snatch Adt

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License

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

package com.radaee.util;
import java.io.File;
import java.util.Vector;
/* www.  j a  v a 2s . co  m*/
import android.content.Context;
import android.database.DataSetObserver;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ExpandableListAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;

public class SnatchAdt implements ExpandableListAdapter
{
  static protected int clr_back = 0xFFCCCCCC;
  static protected int clr_text = 0xFF000044;
  public class SnatchItem
  {
    public String m_path;
    public String m_name;
    LinearLayout m_view;
  }
  public class SnatchGroup
  {
    private Vector<SnatchItem> m_items = new Vector<SnatchItem>();
    public SnatchItem get(int index)
    {
      return m_items.get(index);
    }
    public int get_count()
    {
      return m_items.size();
    }
    public void add_item( String path, String name )
    {
      SnatchItem item = new SnatchItem();
      item.m_name = name;
      item.m_path = path;
      item.m_view = new LinearLayout(m_context);
      TextView view = new TextView(m_context);
      view.setText(name);
      view.setTextSize(18);
      view.setTextColor(clr_text);
      item.m_view.addView(view);
      item.m_view.setPadding(46, 2, 2, 2);
      item.m_view.setBackgroundColor(clr_back);
      m_items.add(item);
    }
    String m_path;
    LinearLayout m_view;
  }
  private Vector<SnatchGroup> m_groups = new Vector<SnatchGroup>();
  private DataSetObserver m_obs;
  private Context m_context;
  private boolean canceling = false;
  private Handler m_hand_ui = new Handler()
  {
    public void handleMessage(Message msg)
    {
      if( m_groups != null )
        m_groups.add((SnatchGroup)msg.obj);
      if( m_obs != null )
        m_obs.onChanged();
      super.handleMessage(msg);
    }
  };
  private Thread m_thread = new Thread()
  {
    @Override
      public void run()
    {
      set_group_root();
    }
  };
  public SnatchAdt( Context ctx )
  {
    m_context = ctx;
  }
  private synchronized Object get_child(int groupPosition, int childPosition)
  {
    return m_groups.get(groupPosition).get(childPosition);
  }
  private synchronized String get_child_path(int groupPosition, int childPosition)
  {
    return m_groups.get(groupPosition).get(childPosition).m_path;
  }
  private synchronized View get_child_view(int groupPosition, int childPosition)
  {
    return m_groups.get(groupPosition).get(childPosition).m_view;
  }
  private synchronized int get_children_count(int groupPosition)
  {
    return m_groups.get(groupPosition).get_count();
  }
  private synchronized Object get_group(int groupPosition)
  {
    return m_groups.get(groupPosition);
  }
  private synchronized View get_group_view(int groupPosition)
  {
    return m_groups.get(groupPosition).m_view;
  }
  private synchronized int get_group_cnt()
  {
    return m_groups.size();
  }
  static private void add_to_group( SnatchGroup group, String path, String name )
  {
    group.add_item(path, name);
  }

    static private String sys_paths[] = {
      "Makefile",
      "acct",
      "bionic",
      "bootable",
      "build",
      "cache",
      "cts",
      "config",
      "d",
      "dalvik",
      "data",
      "dev",
      "development",
      "etc",
      "external",
      "frameworks",
      "hardware",
      "init",
      "out",
      "packages",
      "prebuilt",
      "proc",
      "root",
      "sbin",
      "sdk",
      "sqlite_stmt_journals",
      "sys",
      "system",
      "usbdrive",
      "vendor"
    };
    static boolean is_sys_path(String name)
    {
      int left = 0;
      int right = sys_paths.length - 1;
      while( left <= right )
      {
        int mid = (left + right)>>1;
        int ret = name.compareTo(sys_paths[mid]);
        if( ret > 0  )
          left = mid + 1;
        else if( ret < 0 )
          right = mid - 1;
        else
          return true;
      }
      return false;
    }
    private void set_group_root()
    {
      File file = new File("/");
        File files[] = file.listFiles();
        if (files == null) return;
        SnatchGroup group = new SnatchGroup();
        group.m_path = file.getPath();
        int cur = 0;
        int cnt = files.length;
        while (cur < cnt && !canceling)
        {
          String name = files[cur].getName();
            if( !files[cur].isHidden() && !is_sys_path(name) )
            {
                if (files[cur].isFile())
                {
                    int len = name.length();
                    if (len > 4)
                    {
                        String ext = name.substring(name.length() - 4);
                        if (ext.compareToIgnoreCase(".pdf") == 0)
                            add_to_group(group, files[cur].getPath(), files[cur].getName());
                    }
                }
                else if (files[cur].isDirectory())
                    set_group_files(files[cur]);
            }
            cur++;
        }
        if (group.get_count() != 0)
            m_hand_ui.sendMessage(m_hand_ui.obtainMessage(0, group));
    }
  private void set_group_files( File file )
  {
    File files[] = file.listFiles();
    if( files == null ) return;
    SnatchGroup group = new SnatchGroup();
    group.m_path = file.getPath();
    group.m_view = new LinearLayout(m_context);
    TextView view = new TextView(m_context);
    view.setText(group.m_path);
    view.setTextSize(20);
    view.setTextColor(clr_text);
    group.m_view.addView(view);
    group.m_view.setPadding(36, 3, 2, 3);
    group.m_view.setBackgroundColor(clr_back);
    int cur = 0;
    int cnt = files.length;
    while( cur < cnt )
    {
      if( !files[cur].isHidden() )
      {
        if( files[cur].isFile() )
        {
          String name = files[cur].getName();
          int len = name.length();
          if( len > 4 )
          {
            String ext = name.substring(name.length() - 4);
            if( ext.compareToIgnoreCase(".pdf") == 0 )
              add_to_group(group, files[cur].getPath(), files[cur].getName());
          }
        }
        if( files[cur].isDirectory() )
          set_group_files( files[cur] );
      }
      cur++;
    }
    if( group.get_count() != 0 )
      m_hand_ui.sendMessage(m_hand_ui.obtainMessage(0, group));
  }
    public void start()
    {
        close();
        m_thread.start();
    }

    public synchronized void close()
    {
        if( m_thread.isAlive() )
        {
          canceling = true;
            try
            {
                m_thread.join();
            }
            catch (Exception e)
            {
            }
        }
        canceling = false;
    }
  public boolean areAllItemsEnabled()
  {
    return true;
  }
  public Object getChild(int groupPosition, int childPosition)
  {
    return get_child(groupPosition, childPosition);
  }
  public String getChildPath(int groupPosition, int childPosition)
  {
    return get_child_path(groupPosition, childPosition);
  }

  public long getChildId(int groupPosition, int childPosition)
  {
    return 0;
  }

  public View getChildView(int groupPosition, int childPosition,
      boolean isLastChild, View convertView, ViewGroup parent)
  {
    return get_child_view(groupPosition, childPosition);
  }

  public int getChildrenCount(int groupPosition)
  {
    return get_children_count(groupPosition);
  }

  public long getCombinedChildId(long groupId, long childId)
  {
    return 0;
  }

  public long getCombinedGroupId(long groupId)
  {
    return 0;
  }

  public Object getGroup(int groupPosition)
  {
    return get_group(groupPosition);
  }

  public int getGroupCount()
  {
    return get_group_cnt();
  }

  public long getGroupId(int groupPosition)
  {
    return 0;
  }

  public View getGroupView(int groupPosition, boolean isExpanded,
      View convertView, ViewGroup parent)
  {
    return get_group_view(groupPosition);
  }

  public boolean hasStableIds()
  {
    return false;
  }

  public boolean isChildSelectable(int groupPosition, int childPosition)
  {
    return true;
  }

  public boolean isEmpty()
  {
    return get_group_cnt() == 0;
  }

  public void onGroupCollapsed(int groupPosition)
  {
  }

  public void onGroupExpanded(int groupPosition)
  {
  }

  public void registerDataSetObserver(DataSetObserver observer)
  {
    m_obs = observer;
  }

  public void unregisterDataSetObserver(DataSetObserver observer)
  {
    m_obs = null;
  }
}
Java Source Code List
