Sleep as Android - Captcha support

Introduction

This open-source library contains classes that are useful for developing additional captcha into Sleep as Android application.

Usage

When you use Gradle add the following maven repository and dependency with the latest version to your build.gradle file to use the library:

repositories {
    jcenter()
}

dependencies {
    compile 'com.urbandroid.sleep:captcha-support:0.3.3@aar'
}

Captcha Manifest

Your captcha activity must be exported and single top. OPEN action is mandatory in intent filter otherwise Sleep as Android will not find your captcha.

<manifest ... >

    <application ... >

        <activity
            android:name=".MyCleverCaptchaActivity"
            android:launchMode="singleTop"
            android:label="@string/captcha_label"
            android:exported="true"
            >
            <meta-data android:name="com.urbandroid.sleep.captcha.meta.has_difficulty" android:value="true"/>
            <intent-filter>
                <action android:name="com.urbandroid.sleep.captcha.intent.action.OPEN"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

CaptchaSupport object

All interaction between Sleep and Captcha is covered by CaptchaSupport object. It must be created inside onCreate and onNewIntent method of Activity. Also proper releasing captcha support receivers must be called from onDestroy method.

    private CaptchaSupport captchaSupport;

    protected void onCreate(final Bundle savedInstanceState) {
        ...
        captchaSupport = CaptchaSupportFactory.create(this);
        ...
    }

    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        captchaSupport = CaptchaSupportFactory.create(this, intent);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        captchaSupport.destroy();
    }

Note that, creation captcha support object in onNewIntent has different constructor and must have 2-nd argument intent.

When CaptchaSupport object is created you can

• check in which mode (Preview, Configuration, Operational) is captcha running by CaptchaSupport.getMode() or CaptchaSupport.isPreviewMode(), isOperationalMode(), isConfigurationMode()
• get difficulty (1-5) - use CaptchaSupport.getDifficulty()
• set up time remaining listener CaptchaSupport.setRemainingTimeListener()
• call solved method when captcha is successfully resolved
• call unsolved method when captcha was not solved but user left activity
• call alive in order to reset timeout for solving captcha
• or use advanced features like CaptchaFinder for getting list of all available captchas on mobile and launch them via CaptchaLauncher

Difficulty

In case your captcha need support several level of difficulty, put following lines in AndroidManifest file,

    <activity ...>
        ...
        <meta-data android:name="com.urbandroid.sleep.captcha.meta.has_difficulty" android:value="true"/>
        ...
    </activity>

In order to get current captcha difficulty, call CaptchaSupport.getDifficulty(). Use CaptchaDifficulty annotation to get all possible values.

Captcha Order

When your application contains more than one captcha activity, you can find out useful to sort them in Sleep app by declaring order.

    <activity ...>
        ...
        <meta-data android:name="com.urbandroid.sleep.captcha.meta.order" android:value="1"/>
        ...
    </activity>
    <activity ...>
        ...
        <meta-data android:name="com.urbandroid.sleep.captcha.meta.order" android:value="2"/>
        ...
    </activity>

Captcha Configuration

In case your captcha requires any kind of additional configuration you have two options

1. Add CONFIG action into your Captcha Activity

    <activity
        android:name=".MyCleverCaptchaActivity"
        ...
        >
        <intent-filter>
            <action android:name="com.urbandroid.sleep.captcha.intent.action.OPEN"/>
            <action android:name="com.urbandroid.sleep.captcha.intent.action.CONFIG"/>
        </intent-filter>
    </activity>

When CaptchaSupport object (onCreate/onNewIntent) is created, you should check mode in which captcha is running. To detect mode call either isConfigurationMode() and/or isOperationalMode().

2. Create special config activity referring to your captcha activity

<activity
    android:name=".MyCleverCaptchaActivity"
  ...>

  <intent-filter>
    <action android:name="com.urbandroid.sleep.captcha.intent.action.OPEN"/>
  </intent-filter>
</activity>

<activity
    android:name=".MyCleverCaptchaConfigActivity"
  ...>

  <meta-data android:name="com.urbandroid.sleep.captcha.meta.for_captcha" android:value=".MyCleverCaptchaActivity"/>
  <intent-filter>
    <action android:name="com.urbandroid.sleep.captcha.intent.action.CONFIG"/>
  </intent-filter>
</activity>

This is preferable way doing captcha configuration since it separates two aspects of captcha and creates less messy code handling two modes in one activity (as per case 1).

Recommendation

• Don't forget to define your activity with exported="true" and as singleTop otherwise the captcha will not be accessible and/or duplicated.
• CaptchaSupport object must be created in Activity.onCreate or onPostCreate method and also onNewIntent
• override Activity.onUserInteraction() method to call CaptchaSupport.alive() method
• override Activity.onBackPressed() method to call CaptchaSupport.unsolved()

Read more and get started

Check simple github project captcha examples or read more on the website.