Android Open Source - SimpleFileChosser File Chooser Dialog

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Back to project page SimpleFileChosser.

License

The source code is released under:

Apache License

Java Source Code

package com.emelabs.filechooser;
//from  ww  w  .j  a v a2  s. co m
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

/* ========================================================================
 * 
 * Copyright (C) 2011-2012 George Yunaev
 * Based on a dialog chooser from George Yunaev
 * 
 * Copyright 2013 emelabs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================================
 */

public class FileChooserDialog implements OnItemClickListener,
    OnClickListener {
  
  private static final String TAG = "FileChooserDialog";
  
  private static final String PARENT = "..";
  
  private List<File> entries = new ArrayList<File>();
  
  private File currentDir;
  private Context context;
  private AlertDialog alertDialog;
  private ListView listView;
  private Result result;
  
  /**
   * Constructor
   * 
   * @param context 
   * @param result
   * @param startDir source of start directory
   * 
   * @see Result
   */
  public FileChooserDialog(Context context, Result result, String startDir) {
    this.context = context;
    this.result = result;

    if (startDir != null && !startDir.equals("")) {
      currentDir = new File(startDir);
    } else {
      currentDir = Environment.getExternalStorageDirectory();
    }

    listDirectories();
    ShowFileAdapter adapter = new ShowFileAdapter(R.layout.listitem_row_textview);

    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    builder.setTitle(R.string.choosedir_title);
    builder.setAdapter(adapter, this);
    
    builder.setNegativeButton(this.context.getResources().getString(R.string.action_close),
        new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int id) {
            dialog.cancel();
          }
        });

    alertDialog = builder.create();
    listView = alertDialog.getListView();
    listView.setOnItemClickListener(this);
    alertDialog.show();
  }
  
  
  /**
   * List all directories and files from the current directory
   */
  private void listDirectories() {
    entries.clear();

    // Get files from directory
    File[] files = currentDir.listFiles();

    // Add the PARENT entry
    if (currentDir.getParent() != null) {
      entries.add(new File(PARENT));
    }

    if (files != null) {
      for (File file : files) {
        //filter hidden files
        if (!file.getName().startsWith(".")) {
          entries.add(file);
        }
      }
    }

    Collections.sort(entries, new Comparator<File>() {
      @SuppressLint("DefaultLocale")
      public int compare(File f1, File f2) {
        return f1.getName().toLowerCase().compareTo(f2.getName().toLowerCase());
      }
    });
  }

  

  @Override
  public void onItemClick(AdapterView<?> adapter, View list, int pos, long id) {
    Log.v(TAG, "[onItemClick] entering with " + currentDir);
    
    if (pos < 0 || pos >= entries.size()) {
      return;
    }

    final File file = entries.get(pos);
    if (file.isFile()) {
      AlertDialog.Builder builder = new AlertDialog.Builder(context);
      builder.setTitle(R.string.confirmation_title);
      builder.setMessage(context.getResources().getString(R.string.confirmation_message).replace("{FILE}", file.getName()));
      
      builder.setPositiveButton(context.getResources().getString(R.string.action_open), 
          new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
              Log.d(TAG, "[onItemClick] [onClick] opening file " + file.getName());
              alertDialog.cancel();
              result.onChooseDirectory(file);
            }
          });
      
      builder.setNegativeButton(context.getResources().getString(R.string.action_cancel),
          new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
              dialog.cancel();
            }
          });

      AlertDialog alertDialog = builder.create();
      alertDialog.show();
    } else if (file.getName().equals(PARENT)) {
      currentDir = currentDir.getParentFile();
      setRecursiveDirectory();
    } else {
      currentDir = entries.get(pos);
      setRecursiveDirectory();
    }
  }

  private void setRecursiveDirectory() {
    listDirectories();
    ShowFileAdapter adapter = new ShowFileAdapter(R.layout.listitem_row_textview);
    listView.setAdapter(adapter);
  }

  public void onClick(DialogInterface dialog, int which) {
    Log.v(TAG, "[onClick] entering with which[" + which + "]");
  }
  
  
  /**
   * You must implement the Result interface for get the response
   *
   */
  public interface Result {
    void onChooseDirectory(File file);
  }
  

  /**
   * Adapter to present the files and directories at the view
   *
   */
  public class ShowFileAdapter extends ArrayAdapter<File> {
    
    public ShowFileAdapter(int resourceID) {
      super(context, resourceID, entries);
    }

    // This function is called to show each view item
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      
      TextView item = (TextView) super.getView(position, convertView, parent);

      if (entries.get(position) == null || entries.get(position).getName().equals(PARENT)) {        
        item.setCompoundDrawablesWithIntrinsicBounds(context.getResources().getDrawable(R.drawable.ic_parent_dir), null, null, null);
        item.setText(PARENT);
      } else {
        File file = entries.get(position);

        item.setText(file.getName());
        if (file.isDirectory()) {
          item.setCompoundDrawablePadding(6);
          item.setCompoundDrawablesWithIntrinsicBounds(context.getResources().getDrawable(R.drawable.ic_directory), null, null, null);
        } else if (file.isFile()) {
          item.setCompoundDrawablePadding(6);
          item.setCompoundDrawablesWithIntrinsicBounds(context.getResources().getDrawable(R.drawable.ic_file), null, null, null);
        } else {
          Log.w(TAG, "[getView] file not recognized [" + file + "]");
        }
      }
      return item;
    }
  }
}

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