# APIs and Page Actions

BlueFletch Browser contains built-in APIs or Actions that can be used directly from your website code.

## Android Namespace

The following commands are declared under the `window.android` namespace and can be used as follows:

<table><thead><tr><th width="317">Function</th><th>Description</th></tr></thead><tbody><tr><td><code>android.showToast(message)</code></td><td>Instruct browser to show an Android toast message.</td></tr><tr><td><code>android.redirect(url)</code></td><td>Instruct browser to redirect to the specified URL.</td></tr><tr><td><code>android.goBack()</code></td><td>Instruct browser to go back one page</td></tr><tr><td><code>android.quit()</code></td><td>Instruct browser to close the current browser instance</td></tr></tbody></table>

## EMS Namespace

The following commands/actions are declared under the `window.ems` namespace and can be used as follows:

<table><thead><tr><th width="369">Function</th><th>Description</th></tr></thead><tbody><tr><td><code>ems.getCurrentSession()</code></td><td>returns a JSON object containing the current Launcher session.</td></tr><tr><td><code>ems.getCurrentConfig()</code></td><td>returns a JSON object containing the current Launcher configuration</td></tr><tr><td><code>ems.showKeyboard()</code></td><td>Instruct browser to bring up the soft keyboard</td></tr><tr><td><code>ems.hideKeyboard()</code></td><td>Instruct browser to hide the soft keyboard</td></tr><tr><td><code>ems.sendIntent(intentObject)</code></td><td>Instruct browser to send an Android Intent.  The structure of the <code>intentObject</code> is based on the <a href="/pages/KSBb8WYVcJqVZr4wJMtf">Custom Intent</a> object in Launcher.</td></tr><tr><td><code>ems.setStorageItem(key, value)</code></td><td>Instruct browser to keep set a key-value string pair in memory</td></tr><tr><td><code>ems.getStorageItem(key)</code></td><td>Retrieve the value for a given key from memory that was set using <code>setStorageItem</code></td></tr><tr><td><code>ems.clearStorage()</code></td><td>Clear all key-value pairs stored in memory from <code>setStorageItem</code></td></tr><tr><td><code>ems.enterFullscreen</code></td><td>Instructs browser to enter into a fullscreen mode.</td></tr><tr><td><code>ems.exitFullscreen</code></td><td>Instructs browser to exit the fullscreen mode.</td></tr><tr><td><code>ems.Messaging.subscribe(topic)</code></td><td>Instructs browser to request the EMS Messaging application to subscribe to messages for the supplied topic. Introduced in Browser 2.3.14. Depends on the Messaging application.</td></tr><tr><td><code>ems.Messaging.unsubscribe(topic)</code></td><td>Instructs browser to request the EMS Messaging application to unsubscribe from messages for the supplied topic. Introduced in Browser 2.3.14. Depends on the Messaging application.</td></tr></tbody></table>


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