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Usabilla for Apps - Android SDK

Usabilla for Apps allows you to collect feedback from your users with great ease and flexibility.

From version 6.0.0 of the Usabilla SDK a new visual design with cards has been introduced


  • The Usabilla SDK requires the minSdkVersion of the application to be 16 (Android 4.1).

Android API limitations

Due to changes of the Android framework some minor aspects of the SDK will work differently based on the Android version running on the phone, specifically:

  • The cursor on text fields will be tinted with the accent color only for API >= 21
  • The custom drawables will be applied to the star component only for API >= 21
  • The progress bar at the top of the form will be tinted with the accent color only for API >= 21


  • You can find the latest version of our SDK here and add it as a Maven or a Gradle dependency (implementation 'com.usabilla.sdk:ubform:6.3.0').
  • If you don't want to use a dependency manager you can also import the .aar library independently. Our SDK uses the following dependencies. If your project doesn't use them already you might need to add it as well in your gradle file.
dependencies {
    implement ''
    implement ''
    implement "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.41"

If you have ProGuard enabled you will have to add this line to your ProGuard configuration:

-keep public class com.usabilla.sdk.ubform.eventengine.TargetingOptionsModel


The Usabilla SDK should first of all be initialized using the initialize method in one of its four versions:

Usabilla.initialize(Context context);
Usabilla.initialize(Context context, @Nullable String appId);
Usabilla.initialize(Context context, @Nullable String appId, @Nullable UsabillaHttpClient httpClient);
Usabilla.initialize(Context context, @Nullable String appId, @Nullable UsabillaHttpClient httpClient, @Nullable UsabillaReadyCallback callback);

The method initialize has three optional parameters:

  • appId needs to be used if you want to use the Campaign feature (please read the Campaigns section for more information).
  • httpClient gives the possibility to inject a custom client to handle all the connections performed by the SDK (please read the Custom Http Client section for more information).
  • callback is a callback used to communicate when the initialization process ends.

If you are using Campaigns, the callback will indicate that the SDK is ready to receive events.

The initialize method will take care of:

  • Submitting any pending feedback items.
  • Fetching and updating all campaigns associated with the appId.
  • Initializing a few background processes of the SDK.

⚠️ Failure to call this method before using the SDK will prevent it from running properly.

Debug Mode

In order to obtain more insights form the SDK while developing, logging can be enabled with:


This property is by default set to false.


This guide describes the Campaigns feature and all the steps necessary to work with it.

In the Usabilla for Apps Platform, a campaign is defined as a proactive survey targeted to a specific set of users.

Running Campaigns in your mobile app is great because it allows you to collect very specific insights from a targeted set of users. Furthermore, creating new Campaigns and managing existing ones can be done without the need for a new app release. Everything can be managed from the Usabilla web interface.

You can run as many campaigns as you like and target them to be triggered when a specific set of targeting options are met. The configuration of how a campaign is displayed to the user will be familiar to existing Usabilla customers. You can configure it to suit your needs just like you are used to from the Passive feedback forms.

The most important aspect of running a mobile campaign is the presence of 'Events'. Events are custom triggers that are configured in the SDK. When a pre-defined event occurs, it will allow you to trigger a campaign. A good example of an event is a successful purchase by a user in your app.

The App Id

The appId is an identifier used to associate campaigns to a mobile app. It is generated by Usabilla and can be found in the Usabilla web interface. By loading the SDK with a specific appId, it will fetch all the campaigns connected to it. If you need to know how to find the appId please take a look at our support article here:

We recommend you to use a separate AppId per app. One Campaign can be targeted to multiple apps (e.g. Android production app, Android beta app) by associating it with multiple appIds

Targeting options

Campaigns are triggered by events. Events are used to communicate with the SDK when something happens in your app. Consequently, the SDK will react to an event depending on the configuration of the Usabilla web interface. To send an event to the SDK, use :

Usabilla.sendEvent(Context context, String event);

You can also segment your user base using custom variables. Custom variables can be used to specify some traits of the user and target the campaign only to a specific subset.

For more on how to use custom variables, read Custom Variables

Note: A campaign will never be triggered for the same user more than once.

Managing an existing campaign

You can start collecting campaign results right after you create a new campaign in the Usabilla for Apps Campaign Editor. By default, new campaigns are marked as inactive. On the Usabilla for Apps Campaign Overview page, you can activate or deactivate an existing campaign at any moment to reflect your specific needs.

Moreover, you can update the content of your campaign (e.g. questions) at any time. Keep in mind that the changes you make to an existing active campaign might affect the integrity of the data you collect (different responses before and after a change).

Furthermore, you can also change the targeting options of a campaign. Keep in mind that updating the targeting options of an active campaign will reset any progression previously made on the user's device.

Campaign results

Aggregated campaign results are available for download from the Campaign Overview. Here you can download the results per campaign, in the CSV format.

Campaign results will contain the answers that your users provided. Responses from a campaign are collected and sent to Usabilla page by page. This means that even if a user decides to abandon the campaign halfway through, you will still collect valuable insights. When a user continues to the next page, the results of the previous page are submitted to Usabilla. Besides campaign results showing the answers to your campaign questions, you will be able to view the device metadata and custom variables.

As for campaign results. Please note that editing the form of an existing campaign will affect the aggregated campaign results:

  • Adding new questions to a form will add additional columns to the CSV file.
  • Removing questions from an existing form will not affect the previously collected results. The associated column and its data will still be in the CSV file.
  • Replacing the question type with a different question is also possible. When you give the same 'name' in the Usabilla for Apps Campaign Editor, the results are represented in the same column.

Update fragment manager

⚠️ It's important to note that our campaigns use Android Fragments in order to be displayed to the user; therefore it's important that you provide a reference to the FragmentManager using:

Usabilla.updateFragmentManager(FragmentManager fragmentManager);

Furthermore, remember to handle properly the device rotation and other cases where a new FragmentManager is created, in order to always provide the latest one to the SDK.

The FragmentManager accepted is the one coming from the support library with the path

Reset campaigns data

The Usabilla SDK offers the possibility to reset the campaign data stored locally using the resetCampaignData method in one of its two flavours:

Usabilla.resetCampaignData(Context context);
Usabilla.resetCampaignData(Context context, @Nullable UsabillaReadyCallback callback);

The method removes all campaigns stored locally and fetches them again from our remote API, effectively losing any trace whether they triggered or not. The optional parameter callback is used to communicate when the fetching of the campaigns has ended and the campaign events can start being processed by the Usabilla SDK.

Passive feedback

Passive feedback are feedback forms that are not triggered by events. They are mostly, but not necessarily, initiated directly by the user.

Loading a form

The SDK uses the Form ID you get from Usabilla after creating a new form, to fetch and display the form inside your app. The loadFeedbackForm method can be used in one of its four versions:

Usabilla.loadFeedbackForm(String formId);
Usabilla.loadFeedbackForm(String formId, @Nullable Bitmap screenshot);
Usabilla.loadFeedbackForm(String formId, @Nullable Bitmap screenshot, @Nullable UsabillaHttpClient httpClient);
Usabilla.loadFeedbackForm(String formId, @Nullable Bitmap screenshot, @Nullable UsabillaHttpClient httpClient, @Nullable UsabillaFormCallback callback);

The method loadFeedbackForm has three optional parameters:

  • screenshot is the bitmap that will be attached to the feedback form.
  • httpClient gives the possibility to inject a custom client to handle all the connections performed by the SDK (please read the Custom Http Client section for more information).
  • callback is a callback used to communicate when the loading ends.

A basic implementation of the SDK would be the following:

public class MainActivity extends AppCompatActivity implements UsabillaFormCallback {

    public void loadForm() {
        // After initialising our SDK
        // The null parameters are for the screenshot and theme, both explained in their own chapters
        Usabilla.loadFeedbackForm("the form id to load", null, null, this);

    public void formLoadSuccess(FormClient form) {
              .replace(, form.getFragment(), FRAGMENT_TAG)

    public void formLoadFail() {
        // The form did not load (no internet connection, invalid formId...)

    public void mainButtonTextUpdated(String text) {
        // See section External Navigation

Preloading a form

Our SDK offers the possibility to preload forms. The form will be fetched and stored locally. This could be useful in case the user is offline and the form is requested.

Usabilla.preloadFeedbackForms(List<String> formIds);

Adding a screenshot

It is possible to attach a screenshot to a feedback form.

You can take a screenshot at any moment by calling

// Passing a View to take the screenshot and attach it the form
Bitmap myScreenshot = Usabilla.takeScreenshot(View view);

// Passing an Activity to take the screenshot and attach it the form
Bitmap myScreenshot = Usabilla.takeScreenshot(Activity activity);

These methods will return a bitmap containing a screenshot of the view or activity you have passed.

You can then attach this image, or any other bitmap of your choosing, to the feedback form you're loading by specifying the screenshot parameter in the loadFeedbackForm method.

Bitmap myScreenshot = Usabilla.takeScreenshot(this);
Usabilla.loadFeedbackForm("formId", myScreenshot, null, this);

Feedback submission callback

It is possible to know when the feedback form has been closed implementing the following BroadcastReceiver.

  • Note 1: The form closure happens both as a result of the user dismissing it half-way through or them completing it.
  • Note 2: A separate BroadcastReceiver can be set for both passive feedback and campaigns, depending on your needs.
private BroadcastReceiver usabillaCloserPassive;
private IntentFilter closerFilterPassive = new IntentFilter(UbConstants.INTENT_CLOSE_FORM);
private BroadcastReceiver usabillaCloserCampaign;
private IntentFilter closerFilterCampaign = new IntentFilter(UbConstants.INTENT_CLOSE_CAMPAIGN);

protected void onStart() {
    LocalBroadcastManager.getInstance(this).registerReceiver(usabillaCloserPassive, closerFilterPassive);
    LocalBroadcastManager.getInstance(this).registerReceiver(usabillaCloserCampaign, closerFilterCampaign);

protected void onStop() {

private void setupCloserBroadcastReceiver() {
    usabillaCloserPassive = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            // The passive feedback form has been closed and the feedback result is returned
            // The extra is INTENT_FEEDBACK_RESULT
            final FeedbackResult result = intent.getParcelableExtra(FeedbackResult.INTENT_FEEDBACK_RESULT);
    usabillaCloserCampaign = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            // The campaign feedback form has been closed and the feedback result is returned
            // The extra is INTENT_FEEDBACK_RESULT_CAMPAIGN
            final FeedbackResult result = intent.getParcelableExtra(FeedbackResult.INTENT_FEEDBACK_RESULT_CAMPAIGN);

Feedback Result

public class FeedbackResult {
    int rating;
    int abandonedPageIndex;
    boolean isSent;

The rating value is set as soon as the user interacts with it and will be reported even if the form is not submitted.

The abandonedPageIndex property is only set if the user cancels the form before submission, otherwise its value is -1.

The isSent property is false if the user dropped out while filling the form.

Play Store link

Enable "Show rating prompt after feedback submit" in the Advanced panel of the feedback form editor in order to redirect the user to the Play Store after leaving a positive feedback item.

This will show a native dialog after the last page of the passive feedback form and after the campaign form was displayed. In both cases, they will be displayed only if the mood rating is 4 or 5. Please note that the dialog will only appear on devices that have the Play Store installed (i.e. physical devices).

Reset passive forms

The Usabilla SDK offers the possibility to reset the database from previously fetched passive forms using the removeCachedForms method:


The method removes all passive forms stored locally.

Custom http client

We allow the use of a custom client to handle all the connections to retrieve and send data through our SDK.

To do so we allow to specify a parameter in the initialize method adhering to the UsabillaHttpClient interface, which in turns depends on three other interfaces:

  • UsabillaHttpRequest: encapsulating a HTTP request
  • UsabillaHttpResponse: encapsulating a HTTP response
  • UsabillaHttpListener: providing callbacks for success and failure of a request

A sample http client implementation done leveraging the library OkHttp can be seen in the class

Custom variables

You can pass along custom variables that will be attached to the feedback users send. Custom variables are held in a HashMap<String, Object> in the public interface of the SDK.

You can set custom variables by manipulating the customVariables object, adding or removing entries as you need. An example is as follow:

// Setting a whole object
 HashMap<String, Object> myVariables = new HashMap<>();
 myVariables.put("tier", "premium");
 myVariables.put("loggedIn", true);

 // Modifying the object
 Usabilla.getCustomVariables().put("tier", "premium");

Custom variables are added as extra feedback data with every feedback item sent by the SDK, whether from a passive feedback or a campaign.

⚠️ Custom variables can be used as targeting options, as long as the value is a String.

⚠️ Usabilla.setCustomVariables overwrites the custom variables already present, it does not add them to the pre-existing ones


There are a few limitations to the kind of objects you can add to the custom variables:

  • You can add custom objects, but you will have to override the toString() method to be able to read them from the Usabilla dashboard.
  • Arrays of objects are not accepted and will be removed by our servers
  • The custom variables will be translated into a JSONObject during the submission to our servers, so any non parseable value will break their submission.

UI Customisations


We provide a class UsabillaTheme containing two parameters of type UbFonts and UbImages in its constructor.

They are both nullable, and if not provided will use the SDK default values as follows:

  • UbFonts:
    • text and title size 18sp
    • note text size 16dp
    • boldness enabled
  • UbImages:
    • default mood and stars as seen in the Usabilla dashboard

Custom Images

UbImages can be instantiated with four different parameters:

  • selectedEmoticons is the list of resource IDs to be used as selected emoticons in place of the default ones for the Mood component.
  • unselectedEmoticons is the list of resource IDs to be used as unselected emoticons in place of the default ones for the Mood component.
  • star is the resource ID to be used in place of the default star for the Mood component (when in star version).
  • starOutlineis the resource ID to be used in place of the default star outline for the Mood component (when in star version).

Custom Emoticons Rating

To use custom emoticons you must provide two lists of five image IDs to be used instead of the Usabilla default emoticons (one list for their selected state and one for the unselected state).

The first element of the array should be the lowest or leftmost item, while the 5th element will be the highest or rightmost.

In case you want to use the default Usabilla emoticons, then you need to pass an empty List for the first two parameters.

Passing an empty list as a second parameter (and a valid list with resource IDs as first) will show the provided emoticons with an alpha value of 0.5 when unselected, and with an alpha value of 1 when selected.

// Create images
ArrayList<Integer> imagesIdList = new ArrayList<Integer>();
UbImages themeImages = new UbImages(imagesIdList);

// Update theme
UsabillaTheme newTheme = new UsabillaTheme(null, themeImages);

You can also provide two lists containing the selected and the unselected version of the icons.

UbImages themeImages = new UbImages(selectedEmoticonsImagesIdList, unselectedEmoticonsImagesIdList);

// Update theme
UsabillaTheme newTheme = new UsabillaTheme(null, themeImages);

Custom Star Rating

You can change the appearance of the star in the Star Rating by setting both star and starOutline in the UbImages object.

Keep in mind that, in order to display the Star Rating in your form, you must first enable it in the Usabilla Web Interface.

UbImages themeImages = new UbImages(new ArrayList<Integer>(), new ArrayList<Integer>(), R.drawable.ic_star, R.drawable.ic_star_outline);

// Update theme
UsabillaTheme newTheme = new UsabillaTheme(null, themeImages);

Custom Fonts

UbFonts can be instantiated with five different parameters:

  • regular is the resource IDs for the font to be applied to the feedback form.
  • bold is enabling text to be shown bold (for titles for example).
  • titleSize is the size in sp for the titles in the form
  • textSize is the size in sp for the text in the form
  • miniSize is the size in sp for the small text in the form (e.g. NPS text, Error labels or top page required field note)

⚠️ The font resource needs to be placed in the res/font folder of the project and be in format .otf or .ttf

UbFonts themeFonts = UbFonts(R.font.name_of_your_font)

// Update theme
UsabillaTheme newTheme = new UsabillaTheme(themeFonts, null);

Custom colors

All colors are set from the Usabilla website and not from the SDK. You can find a detailed explanation of the color's name and role in our knowledge base.

Apply different themes to different passive forms

Setting a general theme will apply it to both passive forms and campaign forms.

Additionally, it is possible to specify a theme when requesting a passive form, which will be solely applied to the form upon receiving it.

This can be done as follows:

UbFonts themeFonts = UbFonts(R.font.name_of_your_font)
UbImages themeImages = new UbImages(new ArrayList<Integer>(), new ArrayList<Integer>(), R.drawable.ic_star, R.drawable.ic_star_outline);
UsabillaTheme newTheme = new UsabillaTheme(themeFonts, themeImages);
Usabilla.loadFeedbackForm(formId, null, newTheme, this);

Multiple requests of multiple forms done with different themes will result in each form having its own dedicated theme.


If you want to provide your own translation, you need to override the strings in the default Usabilla SDK. You can do so by providing a string with the same name in your main application string resource file. This will override the SDK default value and yours will be displayed instead.

The string resources you can override and their default value are the following

<string name="ub_field_error">Please check this field</string>
<string name="ub_element_screenshot_title">Screenshot (optional)</string>
<string name="ub_element_screenshot_message">Add screenshot</string>
<string name="ub_button_close_default">Close</string>
<string name="ub_button_continue_default">Continue</string>
<string name="ub_button_playStore_default">Rate on the play store</string>
<string name="ub_button_submit_default">Submit</string>
<string name="ub_dialog_playStore_title">Rate</string>
<string name="ub_dialog_playStore_message">Thank you for your feedback! Would you like to leave a review?</string>
<string name="ub_dialog_playStore_negative">No, thanks</string>
<string name="ub_dialog_playStore_positive">Rate now</string>
<string name="ub_sdk_permission_disabled_label">Permission disabled!\nEnable it from Settings -> app info</string>

// Accessibility labels
<string name="ub_element_mood_select_rating">Select a rating out of %1$d</string>
<string name="ub_element_slider_select_rating">Select a rating from %1$d (%2$s) to %3$d (%4$s)</string>
<string name="ub_element_required">This field is required</string>
<string name="ub_element_screenshot_delete">Delete Screenshot</string>
<string name="ub_element_screenshot_edit">Change Screenshot</string>
<string name="ub_element_mood_hate">I really don\'t like it!</string>
<string name="ub_element_mood_dislike">I don\'t like it</string>
<string name="ub_element_mood_neutral">I feel neutral</string>
<string name="ub_element_mood_like">I like it!</string>
<string name="ub_element_mood_love">I love it!</string>
<string name="ub_element_mood_one_star">One star</string>
<string name="ub_element_mood_two_star">Two stars</string>
<string name="ub_element_mood_three_star">Three stars</string>
<string name="ub_element_mood_four_star">Four stars</string>
<string name="ub_element_mood_five_star">Five stars</string>
<string name="ub_usabilla_logo">Powered by Usabilla</string>

External Navigation

It is possible to hide the default navigation buttons our forms use (continue and cancel button) from the SDK and provide your own (e.g. in the Toolbar).

To do so a couple of steps are required:

  • Set the standard navigation buttons invisible
  • Call the method navigationButtonPushed from the onClickListener of your custom button (e.g. the one you have placed in the Toolbar) to let the form know that it was pressed. ⚠️ This is only associating that click to a 'continue' action, you should provide handling for the cancellation yourself.
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        return true;
  • (OPTIONAL) Use the mainButtonTextUpdated to grab the text for the navigation button you want to use
    public void mainButtonTextUpdated(String text) {
        // Use this text for your own navigation button
        // It returns "Next" or "Submit"


If the user tries to set a custom screenshot, the SDK will ask for the permission to access the external storage.
No other permission is needed to run the SDK.


In order to have Android TalkBack work properly with the passive feedback form, you have to make sure that the Activity (or Fragment) holding the FormClient.fragment received from our SDK stops being considered for TalkBack.

This can be achieved using this line


where view is the ViewGroup you want to exclude from the TalkBack.

Of course when the form is dismissed and you proceed to remove it from its holding Activity (or Fragment) then you can reset the TalkBack to consider it with the line


Dismissing Forms

The SDK provides a way to programatically dismiss all forms through the method:

Usabilla.dismiss(Context context);

For Passive Feedback Forms the SDK only sends the broadcast to close the form. It assumes that the receiver is properly implemented to be able to close the form.

Masking Private Identifiable Information

The SDK has an option to mask (on the back-end side) the data from input texts, specifically Text Input and Text Area. Please note that the an email input field is not being masked.

It matches a list of RegEx and replaces them by the "X" character by default.

The SDK has a setDataMasking method that can be used as:

Usabilla.setDataMasking(List<String> masks);
Usabilla.setDataMasking(List<String> masks, char maskCharacter);
  • masks is a list of RegExes to mask data in input fields. If not set it uses the default RegExes that the SDK provides.
  • maskCharacter is a character to replace the matched RegExes. By default this is "X".

The default RegExes that the SDK provides are: Email Addresses


Numbers with the length 4 or more


The default RegEx and character can be accessed by:

In Java


In Kotlin

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