Android Open Source - ePUB-Converter File Chooser

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Back to project page ePUB-Converter.

License

The source code is released under:

GNU General Public License

Java Source Code

/*
Copyright ?2011 Ezio Querini/*from www.  j  a  v  a  2 s .  co m*/

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program 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 for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.srsahu.epubconverter;

import com.srsahu.epubconverter.R;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class FileChooser extends ListActivity {
  private  String path = "/";
  private  String filter = "";
  private ListView lv;
  private boolean showAllFiles;
  private boolean hideDetail;
  private String history;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.filechoosermain);
    
    // Get extras
    Bundle extras = getIntent().getExtras();
    if (extras != null) {
      if (extras.containsKey("path")) {
        File pathFile = new File(extras.getString("path"));
        if (pathFile.exists() && pathFile.isDirectory() && pathFile.canRead()) {
          path = pathFile.getPath();
          if (!path.endsWith("/")) {
            path += "/";
          }
        }
      }
      if (extras.containsKey("filter")) {
        filter = extras.getString("filter");
      }
    }

    // Update path history
    SharedPreferences sharedPref = this.getPreferences(Context.MODE_PRIVATE);
    history = sharedPref.getString("history", "");
    SharedPreferences.Editor editor = sharedPref.edit();
    history = path + "|" + history.replace(path + "|", "");
    String[] items = history.split("\\|");
    if (items.length > 8) {
      StringBuilder sb = new StringBuilder();
      for (int k = 0;  k < 8; k++) {
        sb.append(items[k]);
        sb.append("|");
      }
      history = sb.toString();
    }
    editor.putString("history", history);
    editor.commit();

    // Set up ListView
    lv = getListView();
    lv.setTextFilterEnabled(true);
    lv.setOnItemClickListener(new OnItemClickListener() {
      // New OnItemClickListener
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        String chosen = ((TextView) view.findViewById(R.id.name)).getText().toString();
        
        if(chosen.endsWith("/")) {
          // Change path
          if (chosen == "/") {
            path = chosen;
          } else if (chosen == "../") {
            path = path.substring(0, path.lastIndexOf('/', path.length() - 2) + 1);
          } else if (chosen.startsWith("/")) {
            path = chosen;
          } else {
            path += chosen;
          }
          setFileList(path, filter);

        } else if (chosen == getResources().getString(R.string.recent_title)) {
          setRecentFolders();
        } else if (chosen == getResources().getString(R.string.back_title)) {
          setFileList(path, filter);
        } else {
          // File chosen
          setResult(RESULT_OK, (new Intent()).setAction(path + chosen));
          finish();
        }
      }
    });

    // Show FileChooser
    setFileList(path, filter);
  }
  
  // Fill FileChooser
  private void setFileList(String dirPath, String ext) {
    ArrayList<FileChooserList> fileChooserList = new ArrayList<FileChooserList>();
    FileChooserList item;
    File f = new File(dirPath + "/");

    // Get preferences
    SharedPreferences prefs=PreferenceManager.getDefaultSharedPreferences(this);
    showAllFiles = prefs.getBoolean("show_all_files", false);
    hideDetail = prefs.getBoolean("hide_detail", false);

    // Add Recent folders
    item = new FileChooserList();
    item.setName(getResources().getString(R.string.recent_title));
    item.setSize(getResources().getString(R.string.recent_summary));
    item.setDate("");
    item.setEnabled(true);
    fileChooserList.add(item);

    // Add Root & Up
    if (dirPath.length() > 1) {
      item = new FileChooserList();
      item.setName("/");
      item.setSize(getResources().getString(R.string.root));
      item.setDate(getDateTime(new File("/")));
      item.setEnabled(true);
      fileChooserList.add(item);
      item = new FileChooserList();
      item.setName("../");
      item.setSize(getResources().getString(R.string.up));
      item.setDate(getDateTime(f.getParentFile()));
      item.setEnabled(true);
      fileChooserList.add(item);
    }

    // Add filenames
    File[] files = f.listFiles(); 
    if (files.length > 0) {
      Arrays.sort(files);
      for(File file : files) {
        if((!file.isHidden()) && (file.canRead())) {
          String fileName = file.getName();
          if (file.isDirectory()) {
            // Folder
            item = new FileChooserList();
            item.setName(fileName + "/");
            item.setSize(getResources().getString(R.string.folder));
            item.setDate(getDateTime(file));
            item.setEnabled(true);
            fileChooserList.add(item);
          } else if (fileName.endsWith(ext)) {
            // Target file
            item = new FileChooserList();
            item.setName(fileName);
            item.setSize(String.format("%d Byte", file.length()));
            item.setDate(getDateTime(file));
            item.setEnabled(true);
            fileChooserList.add(item);
          } else if (showAllFiles) {
            // Other file
            item = new FileChooserList();
            item.setName(fileName);
            item.setSize(String.format("%d Byte", file.length()));
            item.setDate(getDateTime(file));
            item.setEnabled(false);
            fileChooserList.add(item);
          }
        }
      }
    }

    // Update screen
    lv.clearTextFilter();
    ((TextView) findViewById(R.id.path)).setText(String.format(getResources().getString(R.string.path), path));
        lv.setAdapter(new FileChooserAdapter(this, fileChooserList));
  }
  
  // Fill Recent folders
  private void setRecentFolders() {
    ArrayList<FileChooserList> fileChooserList = new ArrayList<FileChooserList>();
    FileChooserList item;
    
    // Get preferences
    SharedPreferences prefs=PreferenceManager.getDefaultSharedPreferences(this);
    showAllFiles = prefs.getBoolean("show_all_files", false);

    // Add Back
    item = new FileChooserList();
    item.setName(getResources().getString(R.string.back_title));
    item.setSize(getResources().getString(R.string.back_summary));
    item.setDate("");
    item.setEnabled(true);
    fileChooserList.add(item);

    // Add filenames
    String[] folders = history.split("\\|");
    if (folders.length > 0) {
      for(String folder : folders) {
        File file = new File (folder);
        if((!file.isHidden()) && (file.canRead())) {
          if (file.isDirectory()) {
            // Folder
            item = new FileChooserList();
            item.setName(folder);
            item.setSize(getResources().getString(R.string.folder));
            item.setDate(getDateTime(file));
            item.setEnabled(true);
            fileChooserList.add(item);
          }
        }
      }
    }

    // Update screen
    lv.clearTextFilter();
    ((TextView) findViewById(R.id.path)).setText(String.format(getResources().getString(R.string.path), path));
        lv.setAdapter(new FileChooserAdapter(this, fileChooserList));
  }
  
  // Get last modification date & time
  String getDateTime(File file) {
    String date = DateUtils.formatDateTime(this, file.lastModified(), DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_NUMERIC_DATE);
    String time = DateUtils.formatDateTime(this, file.lastModified(), DateUtils.FORMAT_SHOW_TIME);
    return String.format("%s %s", date, time);
  }

  // Custom list class
  public class FileChooserList {
    private String name = "";
    private String size = "";
    private String date = "";
    private boolean enabled;

    public void setName(String name) {
      this.name = name;
    }

    public String getName() {
      return name;
    }

    public void setSize(String size) {
      this.size = size;
    }

    public String getSize() {
      return size;
    }

    public void setDate(String date) {
      this.date = date;
    }

    public String getDate() {
      return date;
    }

    public void setEnabled(boolean enabled) {
      this.enabled = enabled;
    }

    public boolean getEnabled() {
      return enabled;
    }
  }

  // Custom adapter
  public class FileChooserAdapter extends BaseAdapter {
    private  ArrayList<FileChooserList> fileChooserList;

    private LayoutInflater mInflater;

    public FileChooserAdapter(Context context, ArrayList<FileChooserList> results) {
      fileChooserList = results;
      mInflater = LayoutInflater.from(context);
    }

    public int getCount() {
      return fileChooserList.size();
    }

    public Object getItem(int position) {
      return fileChooserList.get(position);
    }

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

    public View getView(int position, View convertView, ViewGroup parent) {
      ViewHolder holder;
      if (convertView == null) {
        convertView = mInflater.inflate(R.layout.filechooserrow, null);
        holder = new ViewHolder();
        holder.txtName = (TextView) convertView.findViewById(R.id.name);
        holder.txtSize = (TextView) convertView.findViewById(R.id.size);
        holder.txtDate = (TextView) convertView.findViewById(R.id.date);
        holder.row = (RelativeLayout) convertView.findViewById(R.id.row);

        convertView.setTag(holder);
      } else {
        holder = (ViewHolder) convertView.getTag();
      }

      holder.txtName.setText(fileChooserList.get(position).getName());
      holder.txtSize.setText(fileChooserList.get(position).getSize());
      holder.txtDate.setText(fileChooserList.get(position).getDate());
      
      boolean enabled = fileChooserList.get(position).getEnabled();
      holder.row.setClickable(!enabled);
      holder.row.setFocusable(!enabled);
      holder.row.setEnabled(enabled);
      holder.txtName.setEnabled(enabled);
      
      if (hideDetail) {
        holder.txtSize.setVisibility(View.GONE);
        holder.txtDate.setVisibility(View.GONE);
      }

      return convertView;
    }
    
    class ViewHolder {
      TextView txtName;
      TextView txtSize;
      TextView txtDate;
      RelativeLayout row;
    }
  }
}

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