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vgs-show-android

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VGS Show - Android SDK that enables you to securely display sensitive data https://www.verygoodsecurity.com/docs/vgs-show

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<img src="./ZeroDataLogo.png" width="55" hspace="8">

VGS Show Android SDK allows you to securely reveal data for your users without having to have that data pass through your systems. It provides customizable UI elements for showing users' sensitive data securely on Android devices.

Table of contents
=================

* [Dependencies](#dependencies)
   * [Structure](#structure)
   * [Integration](#integration)
   * [Next steps](#next-steps)
   * [Releases](#releases)
   * [License](#license)

---

## Dependencies

| Dependency | Version |
| :--- |:-------:|
| Min SDK |   21    |
| Target SDK |   34    |
| org.jetbrains.kotlin:kotlin-gradle-plugin |  1.9.22 |
| androidx.appcompat:appcompat |  1.6.1  |
| com.squareup.okhttp3:okhttp | 4.12.0  |

---

## Structure
* **VGSShow SDK** - provides an API for interacting with the VGS Vault
* **app** - sample application to act as the host app for testing the SDK during development
---

## AI Agent Integration
This repository ships a public AI skill at [`skills/vgs-show-android-guide/SKILL.md`](./skills/vgs-show-android-guide/SKILL.md) for teams integrating `VGSShowSDK` into Android applications.

Recommended: install the skill with `skills.sh`. This is the easiest way to give a compatible AI agent repository-specific guidance for `VGSShowSDK` integration work.

The installed skill bundle includes `references/AGENTS.md`, which is the canonical durable integration guide for this SDK.

What the skill is useful for:
- matching guidance to the installed `vgsshow` version when that version can be detected
- steering integrations toward correct secure view setup (`VGSTextView`, `VGSPDFView`, `VGSImageView`) and request/reveal flows
- enforcing non-empty vault configuration and correct environment selection
- preserving redaction-safe logging and analytics toggling guidance
- following upgrade and testing rules in [`references/AGENTS.md`](./skills/vgs-show-android-guide/references/AGENTS.md)

Install the skill with `skills.sh`:
```bash
npx skills add https://github.com/verygoodsecurity/vgs-show-android --skill vgs-show-android-guide
```

If your AI tool does not support skills yet, load [`skills/vgs-show-android-guide/references/AGENTS.md`](./skills/vgs-show-android-guide/references/AGENTS.md) directly.

### Minimal System Prompt Example:

```
You are an autonomous engineering agent integrating the VGS Show Android SDK into an existing Kotlin app.
Use skills/vgs-show-android-guide/references/AGENTS.md as the authoritative policy.
Constraints:
- Only public, non-deprecated APIs.
- No raw sensitive data in logs/tests.
- Securely display sensitive data.

Goals:
1. Add a secure VGSTextView to display sensitive data and a VGSImageView to display a sensitive image.
2. Add redacted logging for all revealed data.
3. Provide unit tests for revealing and displaying data.

Return: Modified Kotlin source files only, no secrets.
```

```
Task: Add a VGSTextView to display a credit card number with a custom redaction format.
Follow skills/vgs-show-android-guide/references/AGENTS.md.
Do not break existing secure views; add tests for redaction and display.
```

---

## Integration
For integration you need to install the [Android Studio](http://developer.android.com/sdk/index.html) and a [JDK](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html) on your machine.

<table>
  <tr>
    <td colspan="2">
      <b>Integrate the VGS Show SDK to your project</b>. <br/>
      If you are using Maven, add the following to your <code>build.gradle</code> file.
    </td>
  </tr>
  <tr>
    <td colspan="2">

```gradle
dependencies {
    implementation "androidx.appcompat:appcompat:<version>"
    implementation "com.google.android.material:material:<version>"

implementation "com.verygoodsecurity:vgsshow:<version>"
}
```
  </td>
  </tr>

<tr>
    <td colspan="2">
    <b>Add secure views to <code>R.layout.activity_main</code> layout file </b>.
    </td>
  </tr>
  <tr>
    <td colspan="2">

```xml
<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
  
    <com.verygoodsecurity.vgsshow.widget.VGSTextView
        android:id="@+id/infoField"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:contentPath="<CONTENT_PATH>"
        app:gravity="center"
        app:textColor="@android:color/black"
        app:textStyle="bold" >
    </com.verygoodsecurity.vgsshow.widget.VGSTextView>

<com.verygoodsecurity.vgsshow.widget.VGSImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        app:contentPath="<CONTENT_PATH_TO_IMAGE>" />

</LinearLayout>
```
  </td>
  </tr>

<tr>
    <td colspan="2">
      <b>
      To initialize VGSShow you have to set your <a href="https://www.verygoodsecurity.com/docs/terminology/nomenclature#vault">vault id</a> and <a href="https://www.verygoodsecurity.com/docs/getting-started/going-live#sandbox-vs-live">Environment</a> type.</b>
      </br>
      Use <code>subscribe(VGSView)</code> to attach secure views to <code>VGSShow</code>.
    </td>

</tr>
  <tr>
    <td colspan="2">

```kotlin
class MainActivity : AppCompatActivity() {
    private lateinit var vgsShow: VGSShow
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

vgsShow = VGSShow(this, "<VAULT_ID>", VGSEnvironment.Sandbox())

val infoField = findViewById<VGSTextView>(R.id.infoField)
        vgsShow.subscribe(infoField)

val imageView = findViewById<VGSImageView>(R.id.imageView)
        vgsShow.subscribe(imageView)
    }
}
```
  </td>
  </tr>

<tr>
    <td colspan="2">
    <b>Revealing Sensitive Data.</b> </br> Call <code>requestAsync</code> to reveal and send data on VGS Server.
    </td>

</tr>
  <tr>
    <td colspan="2">

```kotlin
class MainActivity : AppCompatActivity() {

private lateinit var vgsShow: VGSShow
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        
        vgsShow = VGSShow(this, "<VAULT_ID>", VGSEnvironment.Sandbox())
        vgsShow.subscribe(findViewById<VGSTextView>(R.id.infoField))
        vgsShow.subscribe(findViewById<VGSImageView>(R.id.imageView))

findViewById<Button>(R.id.revealButton)?.setOnClickListener {
            vgsShow.requestAsync("/post",
                VGSHttpMethod.POST,
                mapOf("<FIELD_NAME>" to "<REVEAL_ALIAS>")
            )
        }
    }
}
```
  </td>
  </tr>

<tr>
    <td colspan="2">
    <b> Receive responses. </b>
    </br>
    To retrieve response you need to implement <code>VGSOnResponseListener</code>.
    </td>

</tr>
  <tr>
    <td colspan="2">

```kotlin
class MainActivity : AppCompatActivity() {

private lateinit var vgsShow: VGSShow

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

vgsShow = VGSShow(this, "<VAULT_ID>", VGSEnvironment.Sandbox())
        vgsShow.subscribe(findViewById<VGSTextView>(R.id.infoField))
        vgsShow.subscribe(findViewById<VGSImageView>(R.id.imageView))

findViewById<Button>(R.id.revealButton)?.setOnClickListener {
            vgsShow.requestAsync("/post",
                VGSHttpMethod.POST,
                mapOf("<FIELD_NAME>" to "<REVEAL_ALIAS>")
            )
        }

vgsShow.addOnResponseListener(object : VGSOnResponseListener {
            override fun onResponse(response: VGSResponse) {
                when(response) {
                    is VGSResponse.Success -> {
                        val code = response.code
                    }
                    is VGSResponse.Error -> {
                        val code = response.code
                        val message = response.message
                    }
                }
            }
        })
    }
}
```
  </td>
  </tr>

</table>

## Releases
To follow **VGS Show SDK** updates and changes check the [releases](https://github.com/verygoodsecurity/vgs-show-android/releases) page.

## License
VGSShow Android SDK is released under the MIT license. [See LICENSE](https://github.com/verygoodsecurity/vgs-show-android/blob/master/LICENSE) for details.

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