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GNU General Public License
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package maximsblog.blogspot.com.timestatistic; //ww w .ja v a2 s.co m import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.TreeMap; import android.app.AlertDialog; import android.app.ListActivity; import android.content.DialogInterface; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.inputmethod.InputMethodManager; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; /** * Activity para escolha de arquivos/diretorios. * * @author android * */ public class FileDialog extends ListActivity { /** * Chave de um item da lista de paths. */ private static final String ITEM_KEY = "key"; /** * Imagem de um item da lista de paths (diretorio ou arquivo). */ private static final String ITEM_IMAGE = "image"; /** * Diretorio raiz. */ private static final String ROOT = "/"; /** * Parametro de entrada da Activity: path inicial. Padrao: ROOT. */ public static final String START_PATH = "START_PATH"; /** * Parametro de entrada da Activity: filtro de formatos de arquivos. Padrao: * null. */ public static final String FORMAT_FILTER = "FORMAT_FILTER"; /** * Parametro de saida da Activity: path escolhido. Padrao: null. */ public static final String RESULT_PATH = "RESULT_PATH"; /** * Parametro de entrada da Activity: tipo de selecao: pode criar novos paths * ou nao. Padrao: nao permite. * * @see {@link SelectionMode} */ public static final String SELECTION_MODE = "SELECTION_MODE"; /** * Parametro de entrada da Activity: se e permitido escolher diretorios. * Padrao: falso. */ public static final String CAN_SELECT_DIR = "CAN_SELECT_DIR"; private List<String> path = null; private TextView myPath; private ArrayList<HashMap<String, Object>> mList; //private Button selectButton; //private LinearLayout layoutSelect; private InputMethodManager inputManager; private String parentPath; private String currentPath = ROOT; private int selectionMode = SelectionMode.MODE_CREATE; private String[] formatFilter = null; private boolean canSelectDir = false; private File selectedFile; private HashMap<String, Integer> lastPositions = new HashMap<String, Integer>(); private Button selectButton; /** * Called when the activity is first created. Configura todos os parametros * de entrada e das VIEWS.. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setResult(RESULT_CANCELED, getIntent()); setContentView(R.layout.file_dialog_main); myPath = (TextView) findViewById(R.id.path); inputManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE); selectButton = (Button) findViewById(R.id.fdButtonSelect); selectButton.setVisibility(View.GONE); selectButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (selectedFile != null) { getIntent().putExtra(RESULT_PATH, selectedFile.getPath()); setResult(RESULT_OK, getIntent()); finish(); } } }); selectionMode = getIntent().getIntExtra(SELECTION_MODE, SelectionMode.MODE_CREATE); formatFilter = getIntent().getStringArrayExtra(FORMAT_FILTER); canSelectDir = getIntent().getBooleanExtra(CAN_SELECT_DIR, false); // layoutSelect = (LinearLayout) findViewById(R.id.fdLinearLayoutSelect); String startPath = getIntent().getStringExtra(START_PATH); startPath = startPath != null ? startPath : ROOT; if (canSelectDir) { File file = new File(startPath); selectedFile = file; selectButton.setVisibility(View.VISIBLE); } getDir(startPath); } private void getDir(String dirPath) { boolean useAutoSelection = dirPath.length() < currentPath.length(); Integer position = lastPositions.get(parentPath); getDirImpl(dirPath); if (position != null && useAutoSelection) { getListView().setSelection(position); } } /** * Monta a estrutura de arquivos e diretorios filhos do diretorio fornecido. * * @param dirPath * Diretorio pai. */ private void getDirImpl(final String dirPath) { currentPath = dirPath; final List<String> item = new ArrayList<String>(); path = new ArrayList<String>(); mList = new ArrayList<HashMap<String, Object>>(); File f = new File(currentPath); File[] files = f.listFiles(); if (files == null) { currentPath = ROOT; f = new File(currentPath); files = f.listFiles(); } myPath.setText(getText(R.string.location) + ": " + currentPath); if (!currentPath.equals(ROOT)) { item.add(ROOT); addItem(ROOT, R.drawable.ic_folder_dark); path.add(ROOT); item.add("../"); addItem("../", R.drawable.ic_folder_dark); path.add(f.getParent()); parentPath = f.getParent(); } TreeMap<String, String> dirsMap = new TreeMap<String, String>(); TreeMap<String, String> dirsPathMap = new TreeMap<String, String>(); TreeMap<String, String> filesMap = new TreeMap<String, String>(); TreeMap<String, String> filesPathMap = new TreeMap<String, String>(); for (File file : files) { if(file.getName().startsWith(".")) continue; if (file.isDirectory()) { String dirName = file.getName(); dirsMap.put(dirName, dirName); dirsPathMap.put(dirName, file.getPath()); } else { final String fileName = file.getName(); final String fileNameLwr = fileName.toLowerCase(); // se ha um filtro de formatos, utiliza-o if (formatFilter != null) { boolean contains = false; for (int i = 0; i < formatFilter.length; i++) { final String formatLwr = formatFilter[i].toLowerCase(); if (fileNameLwr.endsWith(formatLwr)) { contains = true; break; } } if (contains) { filesMap.put(fileName, fileName); filesPathMap.put(fileName, file.getPath()); } // senao, adiciona todos os arquivos } else { filesMap.put(fileName, fileName); filesPathMap.put(fileName, file.getPath()); } } } item.addAll(dirsMap.tailMap("").values()); item.addAll(filesMap.tailMap("").values()); path.addAll(dirsPathMap.tailMap("").values()); path.addAll(filesPathMap.tailMap("").values()); SimpleAdapter fileList = new SimpleAdapter(this, mList, R.layout.file_dialog_row, new String[] { ITEM_KEY, ITEM_IMAGE }, new int[] { R.id.fdrowtext, R.id.fdrowimage }); for (String dir : dirsMap.tailMap("").values()) { addItem(dir, R.drawable.ic_folder_dark); } for (String file : filesMap.tailMap("").values()) { addItem(file, R.drawable.ic_file_dark); } fileList.notifyDataSetChanged(); setListAdapter(fileList); } private void addItem(String fileName, int imageId) { HashMap<String, Object> item = new HashMap<String, Object>(); item.put(ITEM_KEY, fileName); item.put(ITEM_IMAGE, imageId); mList.add(item); } /** * Quando clica no item da lista, deve-se: 1) Se for diretorio, abre seus * arquivos filhos; 2) Se puder escolher diretorio, define-o como sendo o * path escolhido. 3) Se for arquivo, define-o como path escolhido. 4) Ativa * botao de selecao. */ @Override protected void onListItemClick(ListView l, View v, int position, long id) { File file = new File(path.get(position)); setSelectVisible(v); if (file.isDirectory()) { //selectButton.setEnabled(false); if (file.canRead()) { lastPositions.put(currentPath, position); getDir(path.get(position)); if (canSelectDir) { selectedFile = file; v.setSelected(true); //selectButton.setEnabled(true); } } else { new AlertDialog.Builder(this).setIcon(R.drawable.ic_launcher) .setTitle("[" + file.getName() + "] " + getText(R.string.cant_read_folder)) .setPositiveButton("OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }).show(); } } else { selectedFile = file; v.setSelected(true); getIntent().putExtra(RESULT_PATH, selectedFile.getPath()); setResult(RESULT_OK, getIntent()); finish(); //selectButton.setEnabled(true); } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK)) { //selectButton.setEnabled(false); if (!currentPath.equals(ROOT)) { getDir(parentPath); } else { return super.onKeyDown(keyCode, event); } return true; } else { return super.onKeyDown(keyCode, event); } } /** * Define se o botao de CREATE e visivel. * * @param v */ private void setCreateVisible(View v) { // layoutSelect.setVisibility(View.GONE); inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0); //selectButton.setEnabled(false); } /** * Define se o botao de SELECT e visivel. * * @param v */ private void setSelectVisible(View v) { // layoutSelect.setVisibility(View.VISIBLE); inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0); // selectButton.setEnabled(false); } }