Android Open Source - Open-file-manager Grid Fragment

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License

The source code is released under:

GNU General Public License

Java Source Code

/*******************************************************************************
 * Copyright (c) 2013 Michele Corazza./*w ww. j a  v a 2s . com*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Credits:
 *   Actionbarsherlock library: for the fragment support
 *   Oxygen team: for the gorgeous icons
 ******************************************************************************/
package com.open.file.manager;

import java.io.File;
import java.util.List;
import java.util.Locale;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.MimeTypeMap;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.GridView;

import com.actionbarsherlock.app.SherlockFragment;
import com.open.file.manager.GridAdapter.Gridviewholder;

public class GridFragment extends SherlockFragment
{
  int mNum;
  View v;
  public GridView grid;
  boolean firstrun;
  File currentdir;
  List<String> selectedfiles;
  GridAdapter myimgad;
  Gridviewlistener onclickcback;
  /**
   * Create a new instance of CountingFragment, providing "num"
   * as an argument.
   */

  public interface Gridviewlistener
  {
    public boolean onClickFile(File clicked, View item);
    public void onLongclickfile(int position, int fragnum, View v, AdapterView<?> parent);
    public void showDialog(int titlebar, int content);
    public void setTitle(CharSequence newtitle);
  }

  static GridFragment newInstance(File initpath) {
    GridFragment f = new GridFragment();
    f.currentdir=initpath;
    return f;
  }

  static GridFragment newInstance(String initpath) {
    GridFragment f = new GridFragment();
    f.currentdir=new File(initpath);
    return f;
  }

  static GridFragment newInstance(String initpath, List<String> initselectedfiles) {
    GridFragment f = new GridFragment();
    f.currentdir=new File(initpath);
    f.selectedfiles=initselectedfiles;
    return f;
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    firstrun=true;
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);
    v = inflater.inflate(R.layout.activity_viewfiles, container, false);
    grid=(GridView) v.findViewById(R.id.listfilesgrid);
    return v;
  }

  /* 
   * When the activity is started, create adapters and set listeners
   */
  public void onActivityCreated(Bundle savedInstanceState)
  {
    super.onActivityCreated(savedInstanceState);
    if(currentdir==null)
    {
      currentdir=new File(savedInstanceState.getString("currentdir"));
    }
    myimgad=new GridAdapter(MainActivity.actcontext, currentdir);
    grid.setAdapter(myimgad);
    myimgad.notifyDataSetChanged();
    grid.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {
        File clicked=myimgad.getItem(position);
        if(!onclickcback.onClickFile(clicked, view))

          if(clicked.isDirectory())
          {
            if(clicked.canRead())
            {
              ChangePath(clicked);
            }
            else
            {
              onclickcback.showDialog(R.string.cantopendir, R.string.error);
            }
          }
          else
          {
            String mimetype = FileOperations.getMimeType(clicked);
            if(clicked.canRead())
            {
              Intent i = new Intent();
              i.setAction(android.content.Intent.ACTION_VIEW);
              i.setDataAndType(Uri.fromFile(clicked), mimetype);
              try
              {
                startActivity(i);
              }
              catch(Exception ex)
              {
                onclickcback.showDialog(R.string.cantopenfile, R.string.error);
              }
            }
            else
            {
              onclickcback.showDialog(R.string.cantread, R.string.error);

            }
          }
        myimgad.notifyDataSetChanged();
      }
    }
        );
    grid.setOnItemLongClickListener(new OnItemLongClickListener()
    {
      public boolean onItemLongClick(AdapterView<?> parent, View view,
          int position, long id) {
        onclickcback.onLongclickfile(position, mNum, view, parent);
        myimgad.notifyDataSetChanged();
        return true;
      }
    });
  }

  @Override
  public void onSaveInstanceState(Bundle outState)
  {
    super.onSaveInstanceState(outState);
    outState.putString("currentdir", currentdir.getAbsolutePath());
  }

  public void ChangePath(File newroot)
  {
    currentdir=newroot;
    myimgad.changepath(newroot);
    grid.smoothScrollToPosition(0);
    updateTitle();
  }

  private void updateTitle() {
    if(!currentdir.equals(new File("/")))
    {
      onclickcback.setTitle(currentdir.getName());
    }
    else
    {
      onclickcback.setTitle("/");
    }
  }

  /**
   * @return parent directory of current path
   */
  public File GetParent()
  {
    File parent = currentdir.getParentFile();
    return parent;
  }

  public File getCurrentDir()
  {
    return currentdir;
  }

  public void refreshFiles()
  {
    myimgad.changepath(currentdir);
    myimgad.notifyDataSetChanged();
    grid.invalidateViews();
  }

  public void onAttach(Activity activity) {
    super.onAttach(activity);

    // This makes sure that the container activity has implemented
    // the callback interface. If not, it throws an exception
    try {
      onclickcback = (Gridviewlistener) activity;
    } catch (ClassCastException e) {
      throw new ClassCastException(activity.toString()
          + " must implement OnPathSelectedListener");
    }
  }


  /**
   * Clear all selected files
   */
  public void clearselection() {
    myimgad.notifyDataSetChanged();
    int gridsize = grid.getChildCount();
    for(int i=0; i<gridsize; i++)
    {
      ((Gridviewholder) grid.getChildAt(i).getTag()).filename.setChecked(false);
      grid.getChildAt(i).setBackgroundResource(R.color.white);
    }
    myimgad.notifyDataSetChanged();
    grid.invalidateViews();
    grid.setAdapter(myimgad);
  }

}

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