i have exactly the same question as this post Choose File Dialog
i didn't see any really usable answers in there.
ideally i would like a simple java code example of a simple dialog that works like MFC CFileDialog Class, i.e. you simply new it, do a .show and it works
everything i've seen so far looks overly complicated for what should be a very simple job. can anyone help with more up to date info?
thanks
UPDATE,
in that post Choose File Dialog the answer by Kirill Mikhailov seems to work fine after a few mins testing
i added a cancel button to that example, seems to work fine
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.List;
import com.design2112.tabtrax.ListenerList.FireHandler;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Environment;
public class FileDialog {
private static final String PARENT_DIR = "..";
private final String TAG = getClass().getName();
private String[] fileList;
private File currentPath;
public interface FileSelectedListener {
void fileSelected(File file);
}
public interface DirectorySelectedListener {
void directorySelected(File directory);
}
private ListenerList<FileSelectedListener> fileListenerList = new ListenerList<FileDialog.FileSelectedListener>();
private ListenerList<DirectorySelectedListener> dirListenerList = new ListenerList<FileDialog.DirectorySelectedListener>();
private final Activity activity;
private boolean selectDirectoryOption;
private String fileEndsWith;
/**
* @param activity
* @param initialPath
*/
public FileDialog(Activity activity, String path) {
this.activity = activity;
loadFileList(new File(path));
}
/**
* @return file dialog
*/
public Dialog createFileDialog() {
Dialog dialog = null;
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setTitle(currentPath.getPath());
/*
* if (selectDirectoryOption) {
* builder.setPositiveButton("Select directory", new OnClickListener() {
* public void onClick(DialogInterface dialog, int which) { Log.d(TAG,
* currentPath.getPath()); fireDirectorySelectedEvent(currentPath); }
* }); }
*/
builder.setItems(fileList, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
String fileChosen = fileList[which];
File chosenFile = getChosenFile(fileChosen);
if (chosenFile.isDirectory()) {
loadFileList(chosenFile);
dialog.cancel();
dialog.dismiss();
showDialog();
} else
fireFileSelectedEvent(chosenFile);
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog = builder.show();
return dialog;
}
public void addFileListener(FileSelectedListener listener) {
fileListenerList.add(listener);
}
public void removeFileListener(FileSelectedListener listener) {
fileListenerList.remove(listener);
}
public void setSelectDirectoryOption(boolean selectDirectoryOption) {
this.selectDirectoryOption = selectDirectoryOption;
}
public void addDirectoryListener(DirectorySelectedListener listener) {
dirListenerList.add(listener);
}
public void removeDirectoryListener(DirectorySelectedListener listener) {
dirListenerList.remove(listener);
}
/**
* Show file dialog
*/
public void showDialog() {
createFileDialog().show();
}
private void fireFileSelectedEvent(final File file) {
fileListenerList.fireEvent(new FireHandler<FileDialog.FileSelectedListener>() {
public void fireEvent(FileSelectedListener listener) {
listener.fileSelected(file);
}
});
}
private void fireDirectorySelectedEvent(final File directory) {
dirListenerList.fireEvent(new FireHandler<FileDialog.DirectorySelectedListener>() {
public void fireEvent(DirectorySelectedListener listener) {
listener.directorySelected(directory);
}
});
}
private void loadFileList(File path) {
this.currentPath = path;
List<String> r = new ArrayList<String>();
if (path.exists()) {
if (path.getParentFile() != null)
r.add(PARENT_DIR);
FilenameFilter filter = new FilenameFilter() {
public boolean accept(File dir, String filename) {
File sel = new File(dir, filename);
if (!sel.canRead())
return false;
if (selectDirectoryOption)
return sel.isDirectory();
else {
boolean endsWith = fileEndsWith != null ? filename
.toLowerCase().endsWith(fileEndsWith) : true;
return endsWith || sel.isDirectory();
}
}
};
String[] fileList1 = path.list(filter);
for (String file : fileList1) {
r.add(file);
}
}
fileList = (String[]) r.toArray(new String[] {});
}
private File getChosenFile(String fileChosen) {
if (fileChosen.equals(PARENT_DIR))
return currentPath.getParentFile();
else
return new File(currentPath, fileChosen);
}
public void setFileEndsWith(String fileEndsWith) {
this.fileEndsWith = fileEndsWith != null ? fileEndsWith.toLowerCase()
: fileEndsWith;
}
}
class ListenerList<L> {
private List<L> listenerList = new ArrayList<L>();
public interface FireHandler<L> {
void fireEvent(L listener);
}
public void add(L listener) {
listenerList.add(listener);
}
public void fireEvent(FireHandler<L> fireHandler) {
List<L> copy = new ArrayList<L>(listenerList);
for (L l : copy) {
fireHandler.fireEvent(l);
}
}
public void remove(L listener) {
listenerList.remove(listener);
}
public List<L> getListenerList() {
return listenerList;
}
}