A file/directory-picker for android. Implemented as a library project.

Jonas Kalderstam

Last update: Dec 27, 2022

Related tags

UI/UX NoNonsense-FilePicker

Overview

Note: avoid using as SD-card file picker on Kitkat+

In Kitkat or above, use Android's built-in file-picker instead. Google has restricted the ability of external libraries like this from creating directories on external SD-cards in Kitkat and above which will manifest itself as a crash.

If you need to support pre-Kitkat devices see #158 for the recommendation approach.

This does not impact the library's utility for non-SD-card locations, nor does it impact you if you don't want to allow a user to create directories.

NoNonsense-FilePicker

Extendable for sources other than SD-card (Dropbox, FTP, Drive, etc)
Can select multiple items
Select directories or files, or both
Create new directories in the picker
Material theme with AppCompat

Yet another file picker library?

I needed a file picker that had two primary properties:

Easy to extend: I needed a file picker that would work for normal files on the SD-card, and also for using the Dropbox API.
Able to create a directory in the picker.

This project has both of those qualities. As a bonus, it also scales nicely to work on any phone or tablet. The core is placed in abstract classes, so it is fairly easy to extend the picker to create your own.

The library includes an implementation that allows the user to pick files from the SD-card. But the picker could easily be extended to get its file listings from another source, such as Dropbox, FTP, SSH and so on. The sample app includes implementations which browses your Dropbox and a Linux mirror FTP-server.

By inheriting from an Activity, the picker is able to be rendered as full screen on small screens and as a dialog on large screens. It does this through the theme system, so it is very important for the activity to use a correctly configured theme.

How to include in your project (with Gradle)

Just add the dependency to your build.gradle:

repositories {
    jcenter()
}

dependencies {
    compile 'com.nononsenseapps:filepicker:4.1.0'
}

How to use the included SD-card picker:

Include permission in your manifest

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Include a provider element

Due to changes in Android 6.0 Marshmallow, bare File URIs can no longer be returned in a safe way. This change requires you to add an entry to your manifest to use the included FilePickerFragment:

NOTE: the authority of this provider is hard-coded in the bundled FilePickerFragment. If you have an existing content provider in your app with the same authority you will have a conflict. You'll either have to rename your existing authority or extend FilePickerFragment and override which authority is used.

    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="${applicationId}.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/nnf_provider_paths" />
    </provider>

Include the file picker activity

The intent filter is optional depending on your use case. Note that the theme set in the manifest is important.

    <activity
       android:name="com.nononsenseapps.filepicker.FilePickerActivity"
       android:label="@string/app_name"
       android:theme="@style/FilePickerTheme">
       <intent-filter>
          <action android:name="android.intent.action.GET_CONTENT" />
          <category android:name="android.intent.category.DEFAULT" />
       </intent-filter>
    </activity>

Configure the theme

You must set the theme on the activity, but you can configure it to match your existing application theme. You can also name it whatever you like..

    <!-- You can also inherit from NNF_BaseTheme.Light -->
    <style name="FilePickerTheme" parent="NNF_BaseTheme">
        <!-- Set these to match your theme -->
        <item name="colorPrimary">@color/primary</item>
        <item name="colorPrimaryDark">@color/primary_dark</item>
        <item name="colorAccent">@color/accent</item>

        <!-- Setting a divider is entirely optional -->
        <item name="nnf_list_item_divider">?android:attr/listDivider</item>

        <!-- Need to set this also to style create folder dialog -->
        <item name="alertDialogTheme">@style/FilePickerAlertDialogTheme</item>

        <!-- If you want to set a specific toolbar theme, do it here -->
        <!-- <item name="nnf_toolbarTheme">@style/ThemeOverlay.AppCompat.Dark.ActionBar</item> -->
    </style>

    <style name="FilePickerAlertDialogTheme" parent="Theme.AppCompat.Dialog.Alert">
        <item name="colorPrimary">@color/primary</item>
        <item name="colorPrimaryDark">@color/primary_dark</item>
        <item name="colorAccent">@color/accent</item>
    </style>

Starting the picker in your app

    // This always works
    Intent i = new Intent(context, FilePickerActivity.class);
    // This works if you defined the intent filter
    // Intent i = new Intent(Intent.ACTION_GET_CONTENT);

    // Set these depending on your use case. These are the defaults.
    i.putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false);
    i.putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, false);
    i.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_FILE);

    // Configure initial directory by specifying a String.
    // You could specify a String like "/storage/emulated/0/", but that can
    // dangerous. Always use Android's API calls to get paths to the SD-card or
    // internal memory.
    i.putExtra(FilePickerActivity.EXTRA_START_PATH, Environment.getExternalStorageDirectory().getPath());

    startActivityForResult(i, FILE_CODE);

Handling the result

You can use the included utility method to parse the activity result:

protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == FILE_CODE && resultCode == Activity.RESULT_OK) {
        // Use the provided utility method to parse the result
        List<Uri> files = Utils.getSelectedFilesFromResult(intent);
        for (Uri uri: files) {
            File file = Utils.getFileForUri(uri);
            // Do something with the result...
        }
    }
}

Want to customize further?

See some examples in the Wiki

See the sample project for examples on dark and light themes, and implementations using Dropbox and FTP.

Not using Gradle yet?

Time to start! To convert your current Eclipse project, have a look at my brief explanation: http://cowboyprogrammer.org/convert-to-android-studio-and-gradle-today/

Changelog

See CHANGELOG

Comments

Add static helper method

The code in the readme is really just boilerplate code, which could be easily extracted in a static helper, as I just did here. I also adjusted the sample to show how it's used.
enhancement

opened by F43nd1r 5

Fixed `FileUriExposed` error on Nougat properly

fixes #107 fixes #115

changelog: You are now required to define a FileProvider in your manifest for the SD-card picker

Due to recent changes in Android 7.0 Nougat, bare File URIs can no longer be returned in a safe way. This change requires you to add an entry to your manifest to use the included FilePickerFragment and change how you handle the results.

You need to add the following to your app's AndroidManifest.xml:

        <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/nnf_provider_paths" />
        </provider>

Then you must change your result handling. Here is a code snippet illustrating the change for a single result (the same applies to multiple results):

protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    // The URI will now be something like content://PACKAGE-NAME/root/path/to/file
    Uri uri = intent.getData();
    // A new utility method is provided to transform the URI to a File object
    File file = com.nononsenseapps.filepicker.Utils.getFileForUri(uri);
    // If you want a URI which matches the old return value, you can do
    Uri fileUri = Uri.fromFile(file);
    // Do something with the result...
}

This change was required in order to fix FileUriExposedException being thrown on Android 7.0 Nougat, as reported in #115 and #107.

Please see the updated activity in the sample app for more examples.

changelog breaking

opened by spacecowboy 5

Ability to specify new file name

Name of a new (non-existing) file name can be specified, e.g. when the file should be created by the app. This is presented to the user as additional menu item and has to be activated: intent.putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_FILE, true);
enhancement addition

opened by rastikw 4
Update build tools to 26.0.2 and update Dropbox sample to v2 API

Hello,

I wanted to use NoNonesense FilePicker in my project to select directories from Dropbox, but it wouldn't work because Dropbox has discontinued the v1 API used by the samples.

I have re-written the Dropbox sample to use the v2 API and thought I would share it for others to benefit.

The only thing that I'm not sure about, and would appreciate your help with, is the change I made in commit a0349ef, which I did to remove a NullPointerException when I first tried to run the Dropbox sample. I feel like I have missed something and that recyclerView in DropboxFilePickerFragment.java should somehow get automatically assigned. Is there a better way that I could have used to do this?
change

opened by mitchyboy9 3
Fixed RuntimeException with empty state in onSaveInstanceState

This adds a dummy value to the state if it is empty in AbstractFilePickerActivity.java. This also first adds the values to the state, and then saves (instead of the other way around) in AbstractFilePickerFragment.java
changelog fix

opened by jangrewe 2
Ensure toasts don't get queued up

If the user spams the OK button with nothing selected, the Toasts queue up which can end up having it display for a long time. This just makes sure only one Toast is enqueued so it will disappear after Toast.LENGTH_SHORT.
bug

opened by hcoosthuizen 2
Select one file with a single click

If only one file is to be selected, it is easier just to click on the file and not used checkboxes. It has to be activated: intent.putExtra(FilePickerActivity.EXTRA_SINGLE_CLICK, true);

This pull request makes changes to the same method signatures as my previous pull request, so merging might be a bit more complicated.
enhancement addition

opened by rastikw 1
NPE on empty dir

Caused by: java.lang.NullPointerException at com.nononsenseapps.filepicker.FilePickerFragment$2.loadInBackground(FilePickerFragment.java:142) at com.nononsenseapps.filepicker.FilePickerFragment$2.loadInBackground(FilePickerFragment.java:135)
fix

opened by arkty 1
Fixed multiple selection throwing exception on nougat
fixes #107 fixes #115

changelog: Multiple selection now returns Strings in ClipData instead of URIs

This means you have to change your code from

intent.getClipData().getItemAt(i).getUri()

to

intent.getClipData().getItemAt(i).getText()

This change was required in order to fix FileUriExposedException being thrown on Android 7.0 Nougat, as reported in #115 and #107.

In addition, the alternative way of getting the result via intent.getStringArrayListExtra(AbstractFilePickerActivity.EXTRA_PATHS) is now available on all SDK versions and not only on pre-android 4.3 as previously. So an alternative would be to do this instead:

ArrayList<String> paths = intent.getStringArrayListExtra(AbstractFilePickerActivity.EXTRA_PATHS);

Please see the updated activity in the sample app for details.
invalid
opened by spacecowboy 0
Add ability to enter a new filename
And a bunch of other improvements

Fixes #82

Needs:

[x] Ability to define a default filename

[x] Play nice when given a specified path pointing to a file

[x] Handle if a filename with path is given, e.g. path/to/file. The goal is not to create all folders. In that case, the user knows what he wants and the calling app should handle non-existing dirs

Image of current state

enhancement addition
opened by spacecowboy 0
Make click events overridable
Added additional methods in AbstractFilePickerFragment to allow more customized behavior. All methods have default behavior, but can be augmented by child classes.:

goUp, navigates to parent directory. goToDir, navigates to specified directory. onClickOK, handles ok button. onClickCancel, handles cancel button. onClickHeader, handles clicks on "..". onClickDir, handles clicks on non-selectable items (usually directories). onLongClickDir, handles long clicks on non-selectable items. onClickCheckable, handles clicks on selectable items. onLongClickCheckable, handles long clicks on selectable items. onClickCheckBox, handles clicks on the checkbox of selectable items.

Please see default implementation and docstrings before overriding them.

enhancement addition
opened by spacecowboy 0

Releases(4.2.1)

4.2.1(Jan 9, 2018)
Fixed

Fixed RuntimeException with empty state in onSaveInstanceState #160 (jangrewe)

Source code(tar.gz)
Source code(zip)
4.2.0(Jan 9, 2018)
Added

Made OK/Cancel strings into library strings for easy overridability #157 (spacecowboy)

Changed

Update build tools to 26.0.2 and update Dropbox sample to v2 API #155 (mitchyboy9)

Source code(tar.gz)
Source code(zip)
4.1.0(Apr 7, 2017)
Added

added a static helper method for parsing activity results #138 (spacecowboy)

Thanks to @F43nd1r for #121

Source code(tar.gz)
Source code(zip)
4.0.1(Apr 7, 2017)
Fixed

Destroy Loader after finish to avoid clearing selections #137 (spacecowboy)

Source code(tar.gz)
Source code(zip)
4.0.0(Feb 3, 2017)
Breaking changes

You are now required to define a FileProvider in your manifest for the SD-card picker 101aa70

Due to recent changes in Android 7.0 Nougat, bare File URIs can no longer be returned in a safe way. This change requires you to add an entry to your manifest to use the included FilePickerFragment and change how you handle the results.

You need to add the following to your app's AndroidManifest.xml:

<provider android:name="android.support.v4.content.FileProvider" android:authorities="${applicationId}.provider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/nnf_provider_paths" /> </provider>

Then you must change your result handling. Here is a code snippet illustrating the change for a single result (the same applies to multiple results):

protected void onActivityResult(int requestCode, int resultCode, Intent intent) { // The URI will now be something like content://PACKAGE-NAME/root/path/to/file Uri uri = intent.getData(); // A new utility method is provided to transform the URI to a File object File file = com.nononsenseapps.filepicker.Utils.getFileForUri(uri); // If you want a URI which matches the old return value, you can do Uri fileUri = Uri.fromFile(file); // Do something with the result... }

This change was required in order to fix FileUriExposedException being thrown on Android 7.0 Nougat, as reported in #115 and #107.

Please see the updated activity in the sample app for more examples.

Changed

Reading multiple selections via intent.getStringArrayListExtra(AbstractFilePickerActivity.EXTRA_PATHS) is now available for all Android versions 4fef8f8

This field was previously only populated on versions below Android 4.3. If you target Android versions before 4.3, you can now use a single method of getting the results instead of switching based on version number.

Source code(tar.gz)
Source code(zip)
4.0.0-beta1(Oct 22, 2016)
Breaking changes

You are now required to define a FileProvider in your manifest for the SD-card picker 101aa70

Due to recent changes in Android 7.0 Nougat, bare File URIs can no longer be returned in a safe way. This change requires you to add an entry to your manifest to use the included FilePickerFragment and change how you handle the results.

You need to add the following to your app's AndroidManifest.xml:

<provider android:name="android.support.v4.content.FileProvider" android:authorities="${applicationId}.provider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/nnf_provider_paths" /> </provider>

Then you must change your result handling. Here is a code snippet illustrating the change for a single result (the same applies to multiple results):

protected void onActivityResult(int requestCode, int resultCode, Intent intent) { // The URI will now be something like content://PACKAGE-NAME/root/path/to/file Uri uri = intent.getData(); // A new utility method is provided to transform the URI to a File object File file = com.nononsenseapps.filepicker.Utils.getFileForUri(uri); // If you want a URI which matches the old return value, you can do Uri fileUri = Uri.fromFile(file); // Do something with the result... }

This change was required in order to fix FileUriExposedException being thrown on Android 7.0 Nougat, as reported in #115 and #107.

Please see the updated activity in the sample app for more examples.

Changed

Reading multiple selections via intent.getStringArrayListExtra(AbstractFilePickerActivity.EXTRA_PATHS) is now available for all Android versions 4fef8f8

This field was previously only populated on versions below Android 4.3. If you target Android versions before 4.3, you can now use a single method of getting the results instead of switching based on version number.

Source code(tar.gz)
Source code(zip)
3.1.0(Sep 30, 2016)
Changelog

Full Changelog

Changes

Fixed missing NonNull annotation in Dropbox Fragment #113

Bump compileVersion to 24 with matching dependencies #113

Source code(tar.gz)
Source code(zip)
nononsensefilepicker-sample-3.1.0-debug.apk(3.15 MB)
3.0.1(Sep 30, 2016)
Added

Add ability to define a list divider in theme #99 (spacecowboy)

Changed

Update back button example d20afa1

Fixes #106

Fixed

Fix some of the samples #108 (spacecowboy)

Use srcCompat for vector drawables #112 (spacecowboy)

Source code(tar.gz)
Source code(zip)
nononsensefilepicker-sample-3.0.1-debug.apk(2.87 MB)
3.0.0(Jul 3, 2016)
Changelog

Full Changelog

Implemented enhancements:

Select one file with a single click #92 (rastikw)

Add ability to enter a new filename #83 (spacecowboy)

Closed issues:

Add ability to input filename #82

New mode

A new mode has been added which matches the traditional Save as dialog in desktop programs. This new mode has a text field which allows the user to input a desired filename.

Related to the new mode, a new option called Allow existing has been added.

Moved part of FilePickerFragment.isItemVisible() into AbstractFilePickerFragment.isItemVisible() to allow any subclass to inherit behavior with regards to modes and options.

Breaking changes

To support the new mode, AbstractFilePickerFragment has been given additional parameters in constructor and arg methods, see for example setArgs(). If you have no interest in the new Save as-mode, either true or false is fine to hardcode as the new parameter's value.

Source code(tar.gz)
Source code(zip)
nononsensefilepicker-sample-3.0.0-debug.apk(2.88 MB)
2.5.3(Jun 8, 2016)
2.5.3 (2016-06-09)

Full Changelog

Implemented enhancements:

Add paths to permission and refresh methods #85

Add FastScroller sample implementation #89 (spacecowboy)

Add a getItem method to FileItemAdapter #88 (spacecowboy)

Fixed bugs:

Crash while creating folder in dropbox sample #76

Closed issues:

Fast Scroll #87

Source code(tar.gz)
Source code(zip)
nononsensefilepicker-sample-2.5.3-debug.apk(1.73 MB)
2.5.2(Feb 24, 2016)
Full Changelog

Implemented enhancements:

Dropbox should show a progress bar when loading #74

Fixed bugs:

Dropbox sample can crash due to Inconsistent state in RecyclerView #75

Dropbox sample crash if multiple press on folder #73

probebly underscore missing #63

Merged pull requests:

Update README.md #68 (callmepeanut)

Source code(tar.gz)
Source code(zip)
nononsensefilepicker-sample-2.5.2-2-g0a511ac-debug.apk(1.62 MB)
2.5.1(Jan 13, 2016)

Change to MPL-2.0
Source code(tar.gz)
Source code(zip)
nononsensefilepicker-sample-2.5.1-debug.apk(1.62 MB)
2.5.0(Nov 8, 2015)

Source code(tar.gz)
Source code(zip)
nononsensefilepicker-sample-2.5.0-debug.apk(1.62 MB)
v2.4.2(Sep 30, 2015)

Now runs all the way back to Gingerbread
Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.56 MB)
v2.4.1(Sep 20, 2015)

New sample app which includes an FTP-implementation.
Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.55 MB)
v2.4.0(Aug 25, 2015)
Added additional methods in AbstractFilePickerFragment to allow more customized behavior. All methods have default behavior, but can be augmented by child classes.:

goUp, navigates to parent directory.

goToDir, navigates to specified directory.

onClickOK, handles ok button.

onClickCancel, handles cancel button.

onClickHeader, handles clicks on "..".

onClickDir, handles clicks on non-selectable items (usually directories).

onLongClickDir, handles long clicks on non-selectable items.

onClickCheckable, handles clicks on selectable items.

onLongClickCheckable, handles long clicks on selectable items.

onClickCheckBox, handles clicks on the checkbox of selectable items.

Please see default implementation and docstrings before overriding them.

Sample applicaton has not changed.
Source code(tar.gz)
Source code(zip)
v2.3.1(Aug 20, 2015)

Enable keyboards and dpads to scroll through the list.

Press left or right for quick access to the cancel/ok buttons.
Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.44 MB)
v2.3.0(Aug 18, 2015)
Added methods to handle runtime permissions in Android M.

FilePicker requests and handles SD-card permission at runtime in Android M.

Target latest Android SDK version.

Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.44 MB)
v2.2.2(Aug 3, 2015)

Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.37 MB)
v2.1(May 30, 2015)
Now easier to override sort-order and filtering in built in SD-card picker with new methods: compareFiles, and isItemVisible.

SD-card picker: Correctly refuse to browse above the root-path.

Allow creation of directories even when picking files.

Upgrade to newest support-library versions and target android 5.1.

Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.37 MB)
v2.0.4(Apr 29, 2015)

Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.35 MB)
v2.0.3(Apr 28, 2015)

Includes a new sample which shows thumbnails of images in list.
Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.34 MB)
v2.0.2(Apr 28, 2015)

Backwards incompatible due to move to RecyclerView and Material Design. But code was simplified somewhat.

Fixes build scripts so it can be published to jcenter.
Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.21 MB)
v2.0.0(Apr 27, 2015)

Backwards incompatible due to move to RecyclerView and Material Design. But code was simplified somewhat.
Source code(tar.gz)
Source code(zip)
sample-debug.apk(1.21 MB)
v1.1.1(Apr 2, 2014)

Source code(tar.gz)
Source code(zip)
sample-debug-unaligned.apk(95.88 KB)
v1.1(Apr 1, 2014)

Source code(tar.gz)
Source code(zip)
sample-debug-unaligned.apk(95.86 KB)

Owner

Jonas Kalderstam

Self hoster and virtual prepper

GitHub

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A file/directory-picker for android. Implemented as a library project.

Related tags

Overview

Note: avoid using as SD-card file picker on Kitkat+

NoNonsense-FilePicker

Yet another file picker library?

How to include in your project (with Gradle)

How to use the included SD-card picker:

Include permission in your manifest

Include a provider element

Include the file picker activity

Configure the theme

Starting the picker in your app

Handling the result

Want to customize further?

Not using Gradle yet?

Changelog

Comments

Releases(4.2.1)

4.2.1(Jan 9, 2018)

Fixed

4.2.0(Jan 9, 2018)

Added

Changed

4.1.0(Apr 7, 2017)

4.0.1(Apr 7, 2017)

4.0.0(Feb 3, 2017)

Breaking changes

Changed

4.0.0-beta1(Oct 22, 2016)

Breaking changes

Changed

3.1.0(Sep 30, 2016)

Changelog

Changes

3.0.1(Sep 30, 2016)

Added

Changed

Fixed

3.0.0(Jul 3, 2016)

Changelog

New mode

Breaking changes

2.5.3(Jun 8, 2016)

2.5.3 (2016-06-09)

2.5.2(Feb 24, 2016)

2.5.1(Jan 13, 2016)

2.5.0(Nov 8, 2015)

v2.4.2(Sep 30, 2015)

v2.4.1(Sep 20, 2015)

v2.4.0(Aug 25, 2015)

v2.3.1(Aug 20, 2015)

v2.3.0(Aug 18, 2015)

v2.2.2(Aug 3, 2015)

v2.1(May 30, 2015)

v2.0.4(Apr 29, 2015)

v2.0.3(Apr 28, 2015)

v2.0.2(Apr 28, 2015)

v2.0.0(Apr 27, 2015)

v1.1.1(Apr 2, 2014)

v1.1(Apr 1, 2014)

Owner

Jonas Kalderstam

Sample project created to show some of the best Android practices to work in the Android UI Layer. The UI layer of this project has been implemented using MVP or MVVM (without binding engine) to show how this patterns works. This project is used during the talk "EffectiveAndroidUI".

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Hackathon Project

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Project of PDP UOC's subject

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