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335 lines
11 KiB
Java
335 lines
11 KiB
Java
// Based on http://code.google.com/p/android-file-dialog/
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//
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// Copyright (c) 2011, 2012, Alexander Ponomarev <alexander.ponomarev.1@gmail.com>
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// Redistributions of source code must retain the above copyright notice, this list
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// of conditions and the following disclaimer. Redistributions in binary form must
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// reproduce the above copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided with the distribution.
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// Neither the name of the <ORGANIZATION> nor the names of its contributors may be used
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// to endorse or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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// DAMAGE.
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package com.lamerman;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.TreeMap;
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import android.app.AlertDialog;
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import android.app.ListActivity;
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import android.content.DialogInterface;
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import android.os.Bundle;
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import android.view.KeyEvent;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.widget.Button;
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import android.widget.ListView;
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import android.widget.SimpleAdapter;
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import android.widget.TextView;
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import org.freedesktop.gstreamer.tutorials.tutorial_5.R;
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/**
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* Activity para escolha de arquivos/diretorios.
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*
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* @author android
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*
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*/
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public class FileDialog extends ListActivity {
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/**
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* Chave de um item da lista de paths.
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*/
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private static final String ITEM_KEY = "key";
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/**
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* Imagem de um item da lista de paths (diretorio ou arquivo).
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*/
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private static final String ITEM_IMAGE = "image";
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/**
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* Diretorio raiz.
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*/
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private static final String ROOT = "/";
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/**
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* Parametro de entrada da Activity: path inicial. Padrao: ROOT.
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*/
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public static final String START_PATH = "START_PATH";
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/**
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* Parametro de entrada da Activity: filtro de formatos de arquivos. Padrao:
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* null.
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*/
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public static final String FORMAT_FILTER = "FORMAT_FILTER";
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/**
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* Parametro de saida da Activity: path escolhido. Padrao: null.
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*/
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public static final String RESULT_PATH = "RESULT_PATH";
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private List<String> path = null;
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private TextView myPath;
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private ArrayList<HashMap<String, Object>> mList;
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private Button selectButton;
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private String parentPath;
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private String currentPath = ROOT;
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private String[] formatFilter = null;
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private File selectedFile;
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private HashMap<String, Integer> lastPositions = new HashMap<String, Integer>();
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/**
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* Called when the activity is first created. Configura todos os parametros
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* de entrada e das VIEWS..
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*/
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setResult(RESULT_CANCELED, getIntent());
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setContentView(R.layout.file_dialog_main);
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myPath = (TextView) findViewById(R.id.path);
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selectButton = (Button) findViewById(R.id.fdButtonSelect);
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selectButton.setEnabled(false);
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selectButton.setOnClickListener(new OnClickListener() {
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public void onClick(View v) {
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if (selectedFile != null) {
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getIntent().putExtra(RESULT_PATH, selectedFile.getPath());
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setResult(RESULT_OK, getIntent());
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finish();
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}
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}
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});
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formatFilter = getIntent().getStringArrayExtra(FORMAT_FILTER);
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final Button cancelButton = (Button) findViewById(R.id.fdButtonCancel);
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cancelButton.setOnClickListener(new OnClickListener() {
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public void onClick(View v) {
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setResult(RESULT_CANCELED);
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finish();
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}
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});
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String startPath;
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if (savedInstanceState != null) {
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startPath = savedInstanceState.getString("currentPath");
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} else {
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startPath = getIntent().getStringExtra(START_PATH);
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}
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startPath = startPath != null ? startPath : ROOT;
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getDir(startPath);
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ListView lv = (ListView) findViewById(android.R.id.list);
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lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
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}
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private void getDir(String dirPath) {
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boolean useAutoSelection = dirPath.length() < currentPath.length();
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Integer position = lastPositions.get(parentPath);
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getDirImpl(dirPath);
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if (position != null && useAutoSelection) {
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getListView().setSelection(position);
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}
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}
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/**
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* Monta a estrutura de arquivos e diretorios filhos do diretorio fornecido.
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*
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* @param dirPath
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* Diretorio pai.
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*/
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private void getDirImpl(final String dirPath) {
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currentPath = dirPath;
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final List<String> item = new ArrayList<String>();
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path = new ArrayList<String>();
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mList = new ArrayList<HashMap<String, Object>>();
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File f = new File(currentPath);
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File[] files = f.listFiles();
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if (files == null) {
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currentPath = ROOT;
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f = new File(currentPath);
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files = f.listFiles();
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}
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myPath.setText(getText(R.string.location) + ": " + currentPath);
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if (!currentPath.equals(ROOT)) {
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item.add(ROOT);
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addItem(ROOT, R.drawable.folder);
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path.add(ROOT);
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item.add("../");
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addItem("../", R.drawable.folder);
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path.add(f.getParent());
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parentPath = f.getParent();
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}
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TreeMap<String, String> dirsMap = new TreeMap<String, String>();
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TreeMap<String, String> dirsPathMap = new TreeMap<String, String>();
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TreeMap<String, String> filesMap = new TreeMap<String, String>();
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TreeMap<String, String> filesPathMap = new TreeMap<String, String>();
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for (File file : files) {
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if (file.isDirectory()) {
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String dirName = file.getName();
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dirsMap.put(dirName, dirName);
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dirsPathMap.put(dirName, file.getPath());
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} else {
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final String fileName = file.getName();
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final String fileNameLwr = fileName.toLowerCase();
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// se ha um filtro de formatos, utiliza-o
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if (formatFilter != null) {
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boolean contains = false;
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for (int i = 0; i < formatFilter.length; i++) {
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final String formatLwr = formatFilter[i].toLowerCase();
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if (fileNameLwr.endsWith(formatLwr)) {
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contains = true;
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break;
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}
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}
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if (contains) {
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filesMap.put(fileName, fileName);
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filesPathMap.put(fileName, file.getPath());
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}
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// senao, adiciona todos os arquivos
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} else {
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filesMap.put(fileName, fileName);
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filesPathMap.put(fileName, file.getPath());
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}
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}
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}
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item.addAll(dirsMap.tailMap("").values());
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item.addAll(filesMap.tailMap("").values());
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path.addAll(dirsPathMap.tailMap("").values());
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path.addAll(filesPathMap.tailMap("").values());
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SimpleAdapter fileList = new SimpleAdapter(this, mList,
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R.layout.file_dialog_row,
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new String[] { ITEM_KEY, ITEM_IMAGE }, new int[] {
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R.id.fdrowtext, R.id.fdrowimage });
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for (String dir : dirsMap.tailMap("").values()) {
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addItem(dir, R.drawable.folder);
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}
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for (String file : filesMap.tailMap("").values()) {
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addItem(file, R.drawable.file);
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}
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fileList.notifyDataSetChanged();
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setListAdapter(fileList);
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}
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private void addItem(String fileName, int imageId) {
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HashMap<String, Object> item = new HashMap<String, Object>();
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item.put(ITEM_KEY, fileName);
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item.put(ITEM_IMAGE, imageId);
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mList.add(item);
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}
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/**
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* Quando clica no item da lista, deve-se: 1) Se for diretorio, abre seus
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* arquivos filhos; 2) Se puder escolher diretorio, define-o como sendo o
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* path escolhido. 3) Se for arquivo, define-o como path escolhido. 4) Ativa
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* botao de selecao.
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*/
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@Override
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protected void onListItemClick(ListView l, View v, int position, long id) {
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File file = new File(path.get(position));
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if (file.isDirectory()) {
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selectButton.setEnabled(false);
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if (file.canRead()) {
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lastPositions.put(currentPath, position);
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getDir(path.get(position));
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} else {
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new AlertDialog.Builder(this)
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.setIcon(android.R.drawable.stat_sys_warning)
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.setTitle(
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"[" + file.getName() + "] "
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+ getText(R.string.cant_read_folder))
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.setPositiveButton("OK",
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new DialogInterface.OnClickListener() {
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public void onClick(DialogInterface dialog,
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int which) {
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}
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}).show();
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}
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} else {
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if (selectedFile != null
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&& selectedFile.getPath().equals(file.getPath())) {
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getIntent().putExtra(RESULT_PATH, selectedFile.getPath());
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setResult(RESULT_OK, getIntent());
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finish();
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}
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selectedFile = file;
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l.setItemChecked(position, true);
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selectButton.setEnabled(true);
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}
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}
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@Override
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public boolean onKeyDown(int keyCode, KeyEvent event) {
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if ((keyCode == KeyEvent.KEYCODE_BACK)) {
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selectButton.setEnabled(false);
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if (!currentPath.equals(ROOT)) {
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getDir(parentPath);
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} else {
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return super.onKeyDown(keyCode, event);
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}
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return true;
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} else {
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return super.onKeyDown(keyCode, event);
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}
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}
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@Override
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protected void onSaveInstanceState(Bundle outState) {
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outState.putString("currentPath", currentPath);
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super.onSaveInstanceState(outState);
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}
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}
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