Android Open Source - Expenses Folder Picker

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 *   Copyright 2013, 2014 Daniel Pereira Coelho
 *   //from   w ww. ja  v  a2 s  .c o  m
 *   This file is part of the Expenses Android Application.
 *
 *   Expenses 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 in version 3.
 *
 *   Expenses 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 Expenses.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package com.dpcsoftware.mn;

import java.io.File;
import java.io.FileFilter;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;

public class FolderPicker extends SherlockActivity implements FileFilter {
  private Resources r;
  private File currentDir;
  private File root;
  private FolderPickerAdapter listAdapter;
  private ListView lv;
  private Comparator<? super File> filecomparator = new Comparator<File>(){
      public int compare(File file1, File file2) {
        if(file1.isDirectory() && file2.isFile())
          return -1;
        
        if(file1.isFile() && file2.isDirectory())
          return 1;
          
        return file1.getName().compareTo(file2.getName());
      }        
  };
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
            
      r = getResources();
      
      Bundle options = getIntent().getExtras();
      
      if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
        App.Toast(this, R.string.folderpicker_c1);
        setResult(0,new Intent());
        this.finish();
        return;
      }
      
      root = Environment.getExternalStorageDirectory();
      
      if(options.containsKey("START_FOLDER")) {
        currentDir = new File(options.getString("START_FOLDER"));
        if(!currentDir.exists()) {
          currentDir = new File(root.getAbsolutePath() + "/" + r.getString(R.string.app_name));
          if(!currentDir.exists())
            currentDir.mkdirs();
        }
      }
      else
        currentDir = root;
           
      setContentView(R.layout.folderpicker);
      
      lv = ((ListView) findViewById(R.id.listView1));
      View header = getLayoutInflater().inflate(R.layout.folderpicker_item, null);
      ((TextView) header.findViewById(R.id.textView1)).setText(R.string.folderpicker_c5);
      header.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
          if(currentDir.equals(root))
            App.Toast(getApplicationContext(), R.string.folderpicker_c2);
          else {
            currentDir = currentDir.getParentFile();
            renderList();
          }            
        }
      });
      lv.addHeaderView(header);
      
      renderList();
  }
  
  @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    getSupportMenuInflater().inflate(R.menu.folderpicker, menu);
    return true;
  }
  
  public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
        case R.id.item1:
          Intent result = new Intent();
        result.putExtra("PATH", currentDir.getAbsolutePath());
        setResult(-1,result);
        App.Toast(this, R.string.folderpicker_c3);
        FolderPicker.this.finish();
          break;
      }
      return true;
  }
  
  private void renderList() {
    List<File> fList;
    
    if(currentDir.equals(root))
      getSupportActionBar().setTitle(R.string.folderpicker_c4);
    else
      getSupportActionBar().setTitle(currentDir.getName());
    
    fList = Arrays.asList(currentDir.listFiles(this));
    Collections.sort(fList, filecomparator);

      listAdapter = new FolderPickerAdapter(fList);      
      lv.setAdapter(listAdapter);
      lv.setOnItemClickListener(listAdapter);
  }
  
  //FileFilter
  public boolean accept(File f) {
    if(f.getName().startsWith("."))
      return false;
    else
      return true;
  }
  
  private class FolderPickerAdapter extends ArrayAdapter<File> implements OnItemClickListener {
    
    public FolderPickerAdapter(List<File> fItems) {
      super(getApplicationContext(),R.layout.folderpicker_item,fItems);
    }
    
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      File item = getItem(position);
      View v;
      if(convertView == null)
        v = getLayoutInflater().inflate(R.layout.folderpicker_item, parent, false);
      else
        v = convertView;
      
      if(item.isDirectory())
        ((ImageView) v.findViewById(R.id.imageView1)).setVisibility(View.VISIBLE);
      else
        ((ImageView) v.findViewById(R.id.imageView1)).setVisibility(View.INVISIBLE);
      
      ((TextView) v.findViewById(R.id.textView1)).setText(item.getName());
      
      return v;
    }
    
    @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
      File item = getItem(position-1);
      if(item.isDirectory()) {
        currentDir = item;
        renderList();
      }
    }
  }
}

Java Source Code List

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