てべすてん

<p>一旦これ読む<br style="display:none">
<span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__f467313a5ed3f" src="https://embed.zenn.studio/card#zenn-embedded__f467313a5ed3f" data-content="https%3A%2F%2Fdeveloper.android.com%2Fdevelop%2Fconnectivity%2Fbluetooth%2Fble%2Fble-overview" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://developer.android.com/develop/connectivity/bluetooth/ble/ble-overview" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://developer.android.com/develop/connectivity/bluetooth/ble/ble-overview</a></p>


<p>BLEにおいて、デバイスの役割として「Central」と「peripheral」がある。</p>
<ul>
<li>Centralは広告をスキャンする</li>
<li>peripheralは広告を作成してばら撒く。</li>
</ul>


<p><span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__3f03c60148497" src="https://embed.zenn.studio/card#zenn-embedded__3f03c60148497" data-content="https%3A%2F%2Fdeveloper.android.com%2Fdevelop%2Fconnectivity%2Fbluetooth%2Fble%2Ffind-ble-devices" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://developer.android.com/develop/connectivity/bluetooth/ble/find-ble-devices" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://developer.android.com/develop/connectivity/bluetooth/ble/find-ble-devices</a></p>


<p>BLEデバイスの検索には <a href="https://developer.android.com/reference/android/bluetooth/le/BluetoothLeScanner#startScan(android.bluetooth.le.ScanCallback)" target="_blank" rel="nofollow noopener noreferrer"><code>startScan()</code></a> を使う。</p>
<div class="code-block-container"><pre class="language-kt"><code class="language-kt"><span class="token keyword">val</span> bluetoothLeScanner <span class="token operator">=</span> bluetoothAdapter<span class="token punctuation">.</span>bluetoothLeScanner
bluetoothLeScanner<span class="token punctuation">.</span><span class="token function">startScan</span><span class="token punctuation">(</span>leScanCallback<span class="token punctuation">)</span>
</code></pre></div>