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It contains the following content: -* TOC -{:toc} +- TOC + {:toc} This tutorial was extensively tested using Android Studio 3.6 on a Dell XPS 13 running Ubuntu 19. If your environment is different, you may encounter @@ -76,8 +78,7 @@ If you don't have these installed, take a moment to install or upgrade as needed ## Build the Blockstack hello-world web app -In this section, you build a Blockstack `hello-world` web application that acts as the companion site to your -Android application. +In this section, you build a Blockstack `hello-world` web application that acts as the companion site to your Android application. ### Generate and launch your hello-blockstack application @@ -88,70 +89,66 @@ In this section, you build an initial React.js application called 1. Create a `hello-blockstack` directory. - ```bash - mkdir hello-blockstack - ``` + ```bash + mkdir hello-blockstack + ``` 2. Change into your new directory. - ```bash - cd hello-blockstack - ``` + ```bash + cd hello-blockstack + ``` 3. Use the Blockstack application generator to create your initial `hello-blockstack` application. - ```bash - $ npx generator-blockstack --plain - create package.json - create .gitignore - create webpack.config.js - create netlify.toml - create firebase.json - ... - added 812 packages from 575 contributors and audited 813 packages in 13.176s - found 1 high severity vulnerability - run `npm audit fix` to fix them, or `npm audit` for details - - ``` - - Depending on your environment you may have some warnings with the installation. Optionally, you can fix these before continuing to the next section. - ``` + ```bash + $ npx generator-blockstack --plain + create package.json + create .gitignore + create webpack.config.js + create netlify.toml + create firebase.json + ... + npm WARN ajv-errors@1.0.1 requires a peer of ajv@>=5.0.0 but none is installed. You must install peer dependencies yourself. + + added 840 packages from 582 contributors and audited 843 packages in 18.84s + found 0 vulnerabilities + ``` -4. Respond to the prompts to populate the initial app. + Depending on your environment you may have some warnings with the installation. Optionally, you can fix these before continuing to the next section. - After the process completes successfully, you see a prompt similar to the following: +4. Depending on your environment, respond to the prompts to populate the initial app. + You might see a prompt similar to the following: - ```bash - [fsevents] Success: - "/Users/theuser/repos/hello-blockstack/node_modules/fsevents/lib/binding/Release/node-v59-darwin-x64/fse.node" - is installed via remote npm notice created a lockfile as package-lock.json. - You should commit this file. added 1060 packages in 26.901s - ``` + ```bash + [fsevents] Success: + "/Users/theuser/repos/hello-blockstack/node_modules/fsevents/lib/binding/Release/node-v59-darwin-x64/fse.node" + is installed via remote npm notice created a lockfile as package-lock.json. + You should commit this file. added 1060 packages in 26.901s + ``` -5. Run the initial application. +5. After the initial setup you can now run the initial application. - ```bash - $ npm run start + ```bash + $ npm run start - > hello-blockstack@0.0.0 start /Users/user/repos/hello-blockstack + > hello-blockstack-webpack@0.0.0 start /home/user/hello-blockstack > webpack-dev-server - Project is running at http://localhost:8080/ - webpack output is served from / - 404s will fallback to /index.html - Hash: 4d2312ba236a4b95dc3a - Version: webpack 2.7.0 - Time: 2969ms - Asset Size Chunks Chunk Names - .... - Child html-webpack-plugin for "index.html": - chunk {0} index.html 541 kB [entry] [rendered] - [0] ./~/lodash/lodash.js 540 kB {0} [built] - [1] ./~/html-webpack-plugin/lib/loader.js!./src/index.html 533 bytes {0} [built] - [2] (webpack)/buildin/global.js 509 bytes {0} [built] - [3] (webpack)/buildin/module.js 517 bytes {0} [built] - webpack: Compiled successfully. - ``` + ℹ ｢wds｣: Project is running at http://localhost:9000/ + ℹ ｢wds｣: webpack output is served from / + ℹ ｢wds｣: Content not from webpack is served from /home/user/hello-blockstack/dist + ℹ ｢wdm｣: Hash: f5d88efe9c9194f66ddd + Version: webpack 4.43.0 + Time: 2733ms + Built at: 05/19/2020 10:44:50 AM + Asset Size Chunks Chunk Names + main.js 5.39 MiB main [emitted] main + .... + [./src/index.js] 1.8 KiB {main} [built] + + 610 hidden modules + ℹ ｢wdm｣: Compiled successfully. + ``` The system opens a browser displaying your running application. @@ -164,72 +161,19 @@ In this section, you build an initial React.js application called The system displays a prompt allowing you to create a new Blockstack ID or restore an existing one. - ![](images/create-restore.png) + ![](images/create-restore.png) 7. Follow the prompts appropriate to your situation. - If you are restoring an existing ID, you may see a prompt about your user - being nameless, ignore it. At this point you have only a single application - on your test server. So, you should see this single application, with your - own `blockstack.id`, once you are signed in: - - ![](images/running-app.png) - - -### Add a redirect end point to your application - -When a user opens the webapp from the Blockstack Browser on an Android phone, -you want the web app to redirect the user to your Android application. The work -you do here will allow it. - -1. From the terminal command line, change directory to the root of your sample -application directory. - -2. Use the `touch` command to add a redirect endpoint to your application. - - This endpoint on the web version of your app will redirect Android users back - to your mobile app. - - ```bash - $ touch public/redirect.html - ``` - -3. Open `redirect.html` and add code to the endpoint. - - ```html - - - - Hello, Blockstack! - - - - - ``` - - Blockstack apps are identified by their domain names. The endpoint will - receive a get request with the query parameter `authResponse=XXXX` and - should redirect the browser to `myblockstackapp:XXXX`. - - `myblockstackapp:` is custom protocol handler. The handler should be unique - to your application. Your app's web-based authentication uses this handler - to redirect the user back to your Android app. Later, you'll add a reference - to this handler in your Android application. + At this point you have only a single application + on your test server. So, you should see this single application, with your + own `blockstack.id`, once you are signed in: -5. Close and save the `redirect.html` file. -6. Ensure your Blockstack compiles successfully. + ![](images/running-app.png) ## Create the hello-android project -In this section, you'll create an Android application in Android Studio. You'll +In this section, you'll create an Android application in Android Studio. You'll run the application in the emulator to test it. ### Create a simple project @@ -237,79 +181,74 @@ run the application in the emulator to test it. In this section, you create an inital project. You'll validate the application's iniatial state by creating an emulator to run it in. Open Android Studio and do the following: - 1. Open Android Studio and choose **Start a new Andriod Studio project**. If studio is already started, choose **File > New > New Project**. -2. Enter these fields in the **Create Android Project** page. - - - - - - - - - - - - - - - - - - -
Application Namehello-android
Company domainUSERNAME.example.com
Project location/Users/USERNAME/AndroidStudioProjects/helloandroid
Include Kotlin supportSet (checked)
- -3. Press **Next** to display **Target Android Devices**. -4. Check **Phone and Tablet**. -5. Choose API 27: Andriod 8.1 (Oreo) for the target version. -6. Press **Next**. -7. Choose **Empty Activity** and press **Next**. -8. Leave the **Configure Activity** dialog with its defaults. - - ![](images/configure-activity.png) - -9. Press **Finish**. +2. Choose a project template: select **Empty Activity** and press **Next** + +3. Enter these fields in the **Create Android Project** page. + + + + + + + + + + + + + + + + + + + + + + +
NameHello Android
Package nameblockstack.id.USERNAME.hello
Project location/home/USERNAME/AndroidStudioProjects/helloandroid
LanguageSelect (Kotlin)
Minimum SDKSelect (API 21: Android 5.0 (Lollipop))
+ +![](images/configure-activity.png) + +4. Press **Finish**. Android studio builds your initial project. This can take a bit the first time you do it. - ![](images/initial-build.png) - ### Run the app in an emulator In this section, you run the appliation and create an emulator when prompted. 1. Once the project is imported into studio, click the `app` module in the **Project** window. -2. Then, select **Run > Run** (or click the green arrow in the toolbar). +2. Then, select **Run > Run** (or click the green arrow in the toolbar). Studio prompts you to **Select Deployment Target**. 3. Choose **Create New Virtual Device** and press **OK**. - Studio prompts you to **Select Hardware**. + Studio prompts you to **Select Hardware**. -4. Choose a Phone running Pixel XL. +4. Choose a Phone device configuration like "Pixel". - ![](images/select-hdw.png) + ![](images/select-hdw.png) - Studio prompts you for a system image. + Studio prompts you for a system image. -5. Choose **Oreo** which is API level 27 and press **Next**. +5. Choose **Q** which is API level 29 and press **Next**. - ![](images/oreo-api.png) + ![](images/q-api.png) - Studio asks you to verify your new emulator configuration. + Studio asks you to verify your new emulator configuration. 6. Press **Finish**. - The emulation takes a moment to build. Then, studio launches the emulation and opens your application. - - ![](images/hello-andriod-1.png) + The emulation takes a moment to build. Then, studio launches the emulation and opens your application. + ![](images/hello-andriod-1.png) ### Configure your application with the Blockstack SDK @@ -317,84 +256,79 @@ Now that you have created your initial project and verified it running in an emu 1. In studio, open the `AndroidManifest.xml` file. -2. Add an `` with the custom handler for Blockstack. +2. Add an `` with the custom handler for Blockstack. Replace the host ("flamboyant-darwin-d11c17.netlify.app") with your own url once you have hosted your web app publicly. - ```XML - - - - - - - ``` + ```XML + + + + + + + ``` -2. Open the Project's `build.gradle` file. -3. Add the Jitpack repository `maven { url 'https://jitpack.io' }` to the `repositories` section. +3. Open the Project's `build.gradle` file ("Project: Hello Android"). +4. Add the Jitpack repository `maven { url 'https://jitpack.io' }` to the `repositories` section. for all projects - When you finish, that section looks like this: + When you finish, that section looks like this: - ```JS - allprojects { - repositories { - google() - jcenter() - maven { url 'https://jitpack.io' } - } - } - ``` - -4. Open the Module `build.gradle` file. -5. Set the `defaultConfig minSdkVersion` to `19`. + ```JS + allprojects { + repositories { + google() + jcenter() + maven { url 'https://jitpack.io' } + } + } + ``` - When you are done, you should see (within your own username not `meepers`): +5. Open the Module `build.gradle` file ("Module: app"). +6. Fix a problem with duplicate meta data in the Android SDK: add `packagingOptions` ```JS android { - compileSdkVersion 27 - defaultConfig { - applicationId "com.example.meepers.hello_android" - minSdkVersion 19 - targetSdkVersion 27 - versionCode 1 - versionName "1.0" - testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" - } ... + packagingOptions { + exclude 'META-INF/*' + } } - ``` + ``` 7. Below this, add the Blockstack Android SDK dependency to your project's `dependencies` list: - When you are done you should see: + When you are done you should see: - ```JS + ```JS dependencies { + implementation fileTree(dir: 'libs', include: ['*.jar']) implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" - implementation 'com.android.support:appcompat-v7:27.1.1' - implementation 'com.android.support.constraint:constraint-layout:1.1.3' - implementation 'com.android.support:design:27.1.1' + implementation 'androidx.appcompat:appcompat:1.1.0' + implementation 'androidx.core:core-ktx:1.2.0' + implementation 'androidx.constraintlayout:constraintlayout:1.1.3' testImplementation 'junit:junit:4.12' - androidTestImplementation 'com.android.support.test:runner:1.0.2' - androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' - implementation 'com.github.blockstack:blockstack-android:0.4.0' + androidTestImplementation 'androidx.test.ext:junit:1.1.1' + androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' + + implementation 'com.github.blockstack:blockstack-android:7940940' + implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.2.0' } - ``` + ``` - **NOTE**: Ignore the warning on the appcompat` dependencies. + **NOTE**: Ignore the warning on the `junit` dependencies. 8. Sync your project. - ![](images/sync-project.png) + ![](images/sync-project.png) - Be sure to check the sync completed successfully. + Be sure to check the sync completed successfully. - ![](images/sync-success.png) + ![](images/sync-success.png) -10. Run your app in the emulator. +9. Run your app in the emulator. - You've made a lot of changes, make sure the emulator is still running - correctly. + You've made a lot of changes, make sure the emulator is still running + correctly. ### Add a simple interface @@ -402,48 +336,50 @@ Now that you have created your initial project and verified it running in an emu The `activity_main.xml` file defines the graphical elements. Some elements are required before you can functionality to your `MainActivity.kt` code. -3. Replace the entire content of the file with the following code: +2. Replace the entire content of the file with the following code: - The new interface includes a `BlockstackSignInButton` which is provided by - the SDK. This SDK includes a themed "Sign in with Blockstack" button - (`BlockstackSignInButton`). You use this button here with the - `org.blockstack.android.sdk.ui.BlockstackSignInButton` class. + The new interface includes a `BlockstackSignInButton` which is provided by + the SDK. This SDK includes a themed "Get Started" button + (`BlockstackSignInButton`). You use this button here with the + `org.blockstack.android.sdk.ui.BlockstackSignInButton` class. ```XML - - - - - - - + + + + + + + ``` This codes adds a button and some text to your application. -4. Choose **Run > Apply changes**. +3. Choose **Run > Apply changes**. -5. Choose **Run > Run app** in the emulator. +4. Choose **Run > Run app** in the emulator. The emulator now contains a new interface with a button: @@ -452,27 +388,35 @@ Now that you have created your initial project and verified it running in an emu ### Add session & authentication code 1. Open the `MainActivity.kt` file. -2. Add some additional imports to the top below the `android.os.Bundle` import. +2. Add some additional imports to the top, replace the `android.os.Bundle` import. - When you are done, your imports should appear as follows: + When you are done, your imports should appear as follows: - ```kotlin + ```kotlin import android.content.Intent import android.os.Bundle - import android.support.v7.app.AppCompatActivity - import android.view.View + import androidx.appcompat.app.AppCompatActivity + import androidx.lifecycle.lifecycleScope import kotlinx.android.synthetic.main.activity_main.* + import kotlinx.coroutines.Dispatchers + import kotlinx.coroutines.launch import org.blockstack.android.sdk.BlockstackSession - import org.blockstack.android.sdk.Scope - import org.blockstack.android.sdk.UserData - import org.blockstack.android.sdk.toBlockstackConfig - ``` -3. Add a variable for the Blockstack session before `onCreate`. + import org.blockstack.android.sdk.BlockstackSignIn + import org.blockstack.android.sdk.SessionStore + import org.blockstack.android.sdk.getBlockstackSharedPreferences + import org.blockstack.android.sdk.model.UserData + import org.blockstack.android.sdk.model.toBlockstackConfig + import org.blockstack.android.sdk.ui.SignInProvider + import org.blockstack.android.sdk.ui.showBlockstackConnect + ``` + +3. Add one variable for the Blockstack sign-in flow and one for the Blockstack session that deals with all other function. This needs to be added before `onCreate`. ```kotlin class MainActivity : AppCompatActivity() { - private var _blockstackSession: BlockstackSession? = null + private lateinit var blockstackSession: BlockstackSession + private lateinit var blockstackSignIn: BlockstackSignIn override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) @@ -481,204 +425,186 @@ Now that you have created your initial project and verified it running in an emu } ``` -4. Replace the existing the `onCreate` function with the following: - - ```kotlin - override fun onCreate(savedInstanceState: Bundle?) { - super.onCreate(savedInstanceState) - setContentView(R.layout.activity_main) - - val scopes = arrayOf(Scope.StoreWrite) - val config = "https://flamboyant-darwin-d11c17.netlify.com" - .toBlockstackConfig(scopes) +4. Replace the existing the `onCreate` function with the following, use your own domain if you are already hosting your web app somewhere: - _blockstackSession = BlockstackSession(this, config) - - signInButton.isEnabled = true + ```kotlin + override fun onCreate(savedInstanceState: Bundle?) { + super.onCreate(savedInstanceState) + setContentView(R.layout.activity_main) + + val appConfig = + "https://flamboyant-darwin-d11c17.netlify.app".toBlockstackConfig() + val sessionStore = SessionStore(getBlockstackSharedPreferences()) + blockstackSession = BlockstackSession(sessionStore, appConfig) + blockstackSignIn = BlockstackSignIn(sessionStore, appConfig) + BlockstackSignIn.shouldLaunchInCustomTabs = false + + signInButton.setOnClickListener { + showBlockstackConnect() + } - signInButton.setOnClickListener { view: View -> - blockstackSession().redirectUserToSignIn { - // only called on error + if (intent?.action == Intent.ACTION_VIEW) { + // handle the redirect from sign in + userDataTextView.text = "Signing in now ..." + lifecycleScope.launch(Dispatchers.IO) { + handleAuthResponse(intent) } - } - if (intent?.action == Intent.ACTION_VIEW) { - // handle the redirect from sign in - handleAuthResponse(intent) - } - } - ``` + } + } + ``` - This new `onCreate` does several things: + This new `onCreate` does several things: - * Define the initial state for the `signInButton`. - * Supply authentication information for connecting to your Blockstack app: `appDomain` and `scopes` (for `redirectURI`, `manifestURI` the default values are used) - * Add a listener for the button click. + - Supply authentication information for connecting to your Blockstack app: `appDomain` (for `scopes`, `redirectURI`, `manifestURI` the default values are used) + - Add a listener for the button click. + - Handles the redirect intent from the sign-in flow. - Notice that the application in this example is a URI you have not set up. - Registering and application name takes time, so in time's interest you'll - use an existing app that is identical to the `hello-world` you created - earlier. For a production version, you'll need to replace `appDomain`, - `redirectURI`, `manifestURI` and `scopes` with values appropriate for your - app. + Notice that the application in this example is a URI you have not set up. + Registering and application name takes time, so in time's interest you'll + use an existing app (https://flamboyant-darwin-d11c17.netlify.app) that is identical to the `hello-world` you created + earlier. For a production version, you'll need to replace `appDomain`, + `redirectURI`, `manifestURI` and `scopes` with values appropriate for your + app. 5. Add a private function to reflect when a user successfully signs in. - ```kotlin - private fun onSignIn(userData: UserData) { - userDataTextView.text = "Signed in as ${userData.decentralizedID}" - signInButton.isEnabled = false - } - ``` + ```kotlin + private fun onSignIn(userData: UserData) { + userDataTextView.text = "Signed in as ${userData.decentralizedID}" + signInButton.isEnabled = false + } + ``` -6. Handle sign in requests with an `onNewIntent` function if the activity was already opened when signing in +6. Create a handler for the authentication response. - Retrieve the authentication token from the custom protocol handler call and - send it to the Blockstack session. + ```kotlin + private fun handleAuthResponse(intent: Intent) { + val authResponse = intent.data?.getQueryParameter("authResponse") + if (authResponse != null) { + val userData = blockstackSession.handlePendingSignIn(authResponse) + if (userData.hasValue) { + // The user is now signed in! + runOnUiThread { + onSignIn(userData.value!!) + } + } + } + } + ``` - ```kotlin - override fun onNewIntent(intent: Intent?) { - super.onNewIntent(intent) +7. Add `SignInProvider` interface for better user onboarding. Let the activity implement the interface and implement the member function `getBlockstackSignIn` - if (intent?.action == Intent.ACTION_VIEW) { - handleAuthResponse(intent) + ```kotlin + class MainActivity : AppCompatActivity(), SignInProvider { + ... + + override fun provideBlockstackSignIn(): BlockstackSignIn { + return blockstackSignIn + } + } + ``` + +8. Verify your final `MainActivity.kt` code looks like this: + + ```kotlin + package blockstack.id.user.hello + ``` + +import android.content.Intent +import android.os.Bundle +import androidx.appcompat.app.AppCompatActivity +import androidx.lifecycle.lifecycleScope +import kotlinx.android.synthetic.main.activity_main.\* +import kotlinx.coroutines.Dispatchers +import kotlinx.coroutines.launch +import org.blockstack.android.sdk.BlockstackSession +import org.blockstack.android.sdk.BlockstackSignIn +import org.blockstack.android.sdk.SessionStore +import org.blockstack.android.sdk.getBlockstackSharedPreferences +import org.blockstack.android.sdk.model.UserData +import org.blockstack.android.sdk.model.toBlockstackConfig +import org.blockstack.android.sdk.ui.SignInProvider +import org.blockstack.android.sdk.ui.showBlockstackConnect + +class MainActivity : AppCompatActivity(), SignInProvider { + + private lateinit var blockstackSession: BlockstackSession + private lateinit var blockstackSignIn: BlockstackSignIn + + override fun onCreate(savedInstanceState: Bundle?) { + super.onCreate(savedInstanceState) + setContentView(R.layout.activity_main) + + val appConfig = + "https://flamboyant-darwin-d11c17.netlify.app".toBlockstackConfig() + val sessionStore = SessionStore(getBlockstackSharedPreferences()) + blockstackSession = BlockstackSession(sessionStore, appConfig) + blockstackSignIn = BlockstackSignIn(sessionStore, appConfig) + BlockstackSignIn.shouldLaunchInCustomTabs = false + + signInButton.setOnClickListener { + showBlockstackConnect() + } + + if (intent?.action == Intent.ACTION_VIEW) { + // handle the redirect from sign in + userDataTextView.text = "Signing in now ..." + lifecycleScope.launch(Dispatchers.IO) { + handleAuthResponse(intent) + } + } } - } - ``` -7. Create a handler for the authentication response. - - ```kotlin - private fun handleAuthResponse(intent: Intent) { - val response = intent.dataString - if (response != null) { - val authResponseTokens = response.split(':') - - if (authResponseTokens.size > 1) { - val authResponse = authResponseTokens[1] - - blockstackSession().handlePendingSignIn(authResponse, { userData -> - if (userData.hasValue) { - // The user is now signed in! - runOnUiThread { - onSignIn(userData.value!!) - } - } - }) - } - } - } - ``` + private fun onSignIn(userData: UserData) { + userDataTextView.text = "Signed in as ${userData.decentralizedID}" + signInButton.isEnabled = false + } -8. Add the convenience method to access the blockstack session. + private suspend fun handleAuthResponse(intent: Intent) { + val authResponse = intent.data?.getQueryParameter("authResponse") + if (authResponse != null) { + val userData = blockstackSession.handlePendingSignIn(authResponse) + if (userData.hasValue) { + // The user is now signed in! + runOnUiThread { + onSignIn(userData.value!!) + } + } + } + } - ```kotlin - fun blockstackSession() : BlockstackSession { - val session = _blockstackSession - if(session != null) { - return session - } else { - throw IllegalStateException("No session.") + override fun provideBlockstackSignIn(): BlockstackSignIn { + return blockstackSignIn } - } - ``` -9. Verify your final `MainActivity.kt` code looks like this: - - ```kotlin - class MainActivity : AppCompatActivity() { - - private var _blockstackSession: BlockstackSession? = null - - override fun onCreate(savedInstanceState: Bundle?) { - super.onCreate(savedInstanceState) - setContentView(R.layout.activity_main) - - signInButton.isEnabled = false - - val scopes = arrayOf(Scope.StoreWrite) - val config = "https://flamboyant-darwin-d11c17.netlify.com" - .toBlockstackConfig(scopes) - - _blockstackSession = BlockstackSession(this, config) - signInButton.isEnabled = true - - signInButton.setOnClickListener { view: View -> - blockstackSession().redirectUserToSignIn { - // only called on error - } - } - if (intent?.action == Intent.ACTION_VIEW) { - handleAuthResponse(intent) - } - } - - private fun onSignIn(userData: UserData) { - userDataTextView.text = "Signed in as ${userData.decentralizedID}" - - signInButton.isEnabled = false - } - - override fun onNewIntent(intent: Intent?) { - super.onNewIntent(intent) - - if (intent?.action == Intent.ACTION_VIEW) { - handleAuthResponse(intent) - } - } - - private fun handleAuthResponse(intent: Intent) { - val response = intent.dataString - if (response != null) { - val authResponseTokens = response.split(':') - - if (authResponseTokens.size > 1) { - val authResponse = authResponseTokens[1] - - blockstackSession().handlePendingSignIn(authResponse, { userData -> - if (userData.hasValue) { - // The user is now signed in! - runOnUiThread { - onSignIn(userData.value!!) - } - } - }) - } - } - } - - fun blockstackSession() : BlockstackSession { - val session = _blockstackSession - if(session != null) { - return session - } else { - throw IllegalStateException("No session.") - } - } - } - ``` +} + +``` ### Run the final app in the emulator 1. Choose **Run > Apply changes**. 2. Choose **Run > Run app** in the emulator. -3. When you see the application open, choose **Sign in with Blockstack**. - - The system prompts you how to open. +3. When you see the application open, choose **Get Started**. +4. A small information is presented about the sign-in flow - ![](images/chrome-prompt.png) +![](images/connect-ui.png) -4. Choose **Chrome** and click **ALWAYS**. -5. Move through the rest of the Chrome prompts. +5. Select **Get Started** +The system might prompt you how to select a browser. - The system presents you with your final application. +6. Work through the Blockstack prompts to login. +7. Blockstack redirects you to a web site. Open it with your Android app: Select **Hello Android** and **Always** - ![](images/final-app.png) +![](images/connect-response.png) -6. Work through the Blockstack prompts to login. +8. The screen after the sign-in flow shows the owner address of the username that was entered during sign-in. +![](images/final-app.png) ## Where to go next Congratulations, you've completed your Android app using the Blockstack Android SDK. Learn more about Blockstack by [trying another tutorial](https://blockstack.org/tutorials). +```