I am using a file chooser I found at this site.
When I browse for a file that I put on the device (whether it be emulated or my Nexus 5), they don't show up. When I browse to /sdcard/, it says no directories or files. I know I have pushed several .txt and .xml files there, and there should be multiple directories there by default. I'm using those files almost exactly.
Any ideas as to what the problem could be?
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class FilePicker extends ListActivity {
public final static String EXTRA_FILE_PATH = "file_path";
public final static String EXTRA_SHOW_HIDDEN_FILES = "show_hidden_files";
public final static String EXTRA_ACCEPTED_FILE_EXTENSIONS = "accepted_file_extensions";
private final static String DEFAULT_INITIAL_DIRECTORY = "/";
protected File Directory;
protected ArrayList<File> Files;
protected FilePickerListAdapter Adapter;
protected boolean ShowHiddenFiles = false;
protected String[] acceptedFileExtensions;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LayoutInflater inflator = (LayoutInflater)
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View emptyView = inflator.inflate(R.layout.empty_view, null);
((ViewGroup) getListView().getParent()).addView(emptyView);
getListView().setEmptyView(emptyView);
// Set initial directory
Directory = new File(DEFAULT_INITIAL_DIRECTORY);
// Initialize the ArrayList
Files = new ArrayList<File>();
// Set the ListAdapter
Adapter = new FilePickerListAdapter(this, Files);
setListAdapter(Adapter);
// Initialize the extensions array to allow any file extensions
acceptedFileExtensions = new String[] {};
// Get intent extras
if(getIntent().hasExtra(EXTRA_FILE_PATH))
Directory = new File(getIntent().getStringExtra(EXTRA_FILE_PATH));
if(getIntent().hasExtra(EXTRA_SHOW_HIDDEN_FILES))
ShowHiddenFiles = getIntent().getBooleanExtra(EXTRA_SHOW_HIDDEN_FILES, false);
if(getIntent().hasExtra(EXTRA_ACCEPTED_FILE_EXTENSIONS)) {
ArrayList<String> collection =
getIntent().getStringArrayListExtra(EXTRA_ACCEPTED_FILE_EXTENSIONS);
acceptedFileExtensions = (String[])
collection.toArray(new String[collection.size()]);
}
}
@Override
protected void onResume() {
refreshFilesList();
super.onResume();
}
protected void refreshFilesList() {
Files.clear();
ExtensionFilenameFilter filter =
new ExtensionFilenameFilter(acceptedFileExtensions);
File[] files = Directory.listFiles(filter);
if(files != null && files.length > 0) {
for(File f : files) {
if(f.isHidden() && !ShowHiddenFiles) {
continue;
}
Files.add(f);
}
Collections.sort(Files, new FileComparator());
}
Adapter.notifyDataSetChanged();
}
@Override
public void onBackPressed() {
if(Directory.getParentFile() != null) {
Directory = Directory.getParentFile();
refreshFilesList();
return;
}
super.onBackPressed();
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
File newFile = (File)l.getItemAtPosition(position);
if(newFile.isFile()) {
Intent extra = new Intent();
extra.putExtra(EXTRA_FILE_PATH, newFile.getAbsolutePath());
setResult(RESULT_OK, extra);
finish();
}
else {
Directory = newFile;
refreshFilesList();
}
super.onListItemClick(l, v, position, id);
}
private class FilePickerListAdapter extends ArrayAdapter<File> {
private List<File> mObjects;
public FilePickerListAdapter(Context context, List<File> objects) {
super(context, R.layout.list_item, android.R.id.text1, objects);
mObjects = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = null;
if(convertView == null) {
LayoutInflater inflater = (LayoutInflater)
getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.list_item, parent, false);
}
else
row = convertView;
File object = mObjects.get(position);
ImageView imageView = (ImageView)row.findViewById(R.id.file_picker_image);
TextView textView = (TextView)row.findViewById(R.id.file_picker_text);
textView.setSingleLine(true);
textView.setText(object.getName());
/*if(object.isFile())
imageView.setImageResource(R.drawable.file);
else
imageView.setImageResource(R.drawable.folder);*/
return row;
}
}
private class FileComparator implements Comparator<File> {
public int compare(File f1, File f2) {
if(f1 == f2)
return 0;
if(f1.isDirectory() && f2.isFile())
// Show directories above files
return -1;
if(f1.isFile() && f2.isDirectory())
// Show files below directories
return 1;
// Sort the directories alphabetically
return f1.getName().compareToIgnoreCase(f2.getName());
}
}
private class ExtensionFilenameFilter implements FilenameFilter {
private String[] Extensions;
public ExtensionFilenameFilter(String[] extensions) {
super();
Extensions = extensions;
}
public boolean accept(File dir, String filename) {
if(new File(dir, filename).isDirectory()) {
// Accept all directory names
return true;
}
if(Extensions != null && Extensions.length > 0) {
for(int i = 0; i < Extensions.length; i++) {
if(filename.endsWith(Extensions[i])) {
// The filename ends with the extension
return true;
}
}
// The filename did not match any of the extensions
return false;
}
// No extensions has been set. Accept all file extensions.
return true;
}
}
}
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="hks003.chordtransposer" >
<!-- <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="14"/> -->
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<activity
android:name=".CurrentKey"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NewKey"
android:label="@string/title_activity_new_key"
android:parentActivityName=".CurrentKey" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="hks003.chordtransposer.CurrentKey" />
</activity>
<activity android:name=".FilePicker">
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
</activity>
</application>
</manifest>
To be clear, when I open /sdcard/, it says no files or directories. There are plenty of directories here, but none are showing up.
You need to add the permissions to read , or write if you need the external storage in the AndroidManifest.xml:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
More: http://developer.android.com/guide/topics/data/data-storage.html#filesExternal
EDIT:
The permissions need to be inside the <manifest> tag not the <aplication> or <activity> tag: http://developer.android.com/guide/topics/manifest/manifest-intro.html , http://developer.android.com/guide/topics/manifest/uses-permission-element.html
Try with this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="hks003.chordtransposer" >
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".CurrentKey"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NewKey"
android:label="@string/title_activity_new_key"
android:parentActivityName=".CurrentKey" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="hks003.chordtransposer.CurrentKey" />
</activity>
<activity android:name=".FilePicker">
</activity>
</application>
</manifest>