Android Open Source - MusicPlayer-OLD Directory Chooser Dialog

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License

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

/*
 * Copyright 2012-2014 Andrea De Cesare// w  w  w. java 2s.  co m
 *
 * 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.
 */

package com.andreadec.musicplayer;

import java.io.*;
import java.util.*;
import android.app.*;
import android.content.*;
import android.view.*;
import android.widget.*;
import android.widget.AdapterView.*;

public class DirectoryChooserDialog implements OnItemClickListener {
  private Activity activity;
  private AlertDialog.Builder dialog;
  private View dialogView;
  private TextView textViewDirectory;
  private ListView listView;
  private File currentDirectory;
  
  public DirectoryChooserDialog(Activity activity, String startDirectory, final OnFileChosen callback) {
    this.activity = activity;
    dialog = new AlertDialog.Builder(activity);
    dialog.setTitle(R.string.chooseDirectory);
    
    dialogView = activity.getLayoutInflater().inflate(R.layout.layout_directorychooser, null, false);
    
    textViewDirectory = (TextView)dialogView.findViewById(R.id.textViewDirectory);
    listView = (ListView)dialogView.findViewById(R.id.listView);
    listView.setOnItemClickListener(this);
    dialog.setView(dialogView);
    
    dialog.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
        callback.onFileChosen(null);
      }
    });
    dialog.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
        callback.onFileChosen(currentDirectory.getAbsolutePath());
      }
    });
    
    currentDirectory = new File(startDirectory);
    updateList();
  }
  
  private void gotoParentDirectory() {
    File newDirectory = currentDirectory.getParentFile();
    if(newDirectory!=null && newDirectory.listFiles()!=null) {
      currentDirectory = newDirectory;
      updateList();
    }
  }
  
  private void gotoDirectory(String name) {
    File newDirectory = new File(currentDirectory.getAbsolutePath()+"/"+name);
    if(newDirectory!=null && newDirectory.listFiles()!=null) {
      currentDirectory = newDirectory;
      updateList();
    }
  }
  
  private void updateList() {
    textViewDirectory.setText(currentDirectory.getAbsolutePath());
    File[] files = currentDirectory.listFiles();
    ArrayList<String> list = new ArrayList<String>();
    list.add("..");
    for(File f : files) {
      if(f.isDirectory()) list.add(f.getName());
    }
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(activity, android.R.layout.simple_list_item_1, list);
    listView.setAdapter(adapter);
  }
  
  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    if(position==0) gotoParentDirectory();
    else gotoDirectory((String)listView.getAdapter().getItem(position));
  }
  
  public void show() {
    dialog.show();
  }
  
  public interface OnFileChosen {
    // filename is null if the user canceled the operation
    public void onFileChosen(String directory);
  }
}
Java Source Code List
