Android5.0 BLE 周边(BluetoothLeAdvertiser)

具有低功耗蓝牙模块的设备可以扮演2个角色，中心，周边。周边是数据提供者，中心是数据接收/处理者。IOS设备可以很好的扮演这2个角色，利用现成的API就能开发出具有周边和中心功能的应用，我大Android就有点悲催了，自Android
4.3的系统就规定了BLE的API，但是仅限于中心，至于周边一直没有API的支持。直到2014.6.26 Android Lollipop的面世，才带来了周边API的支持(BluetoothLeAdvertiser)。



利用空闲时间看了看文档写了个一段关于BLE 周边的代码，当我兴冲冲的运行在Nexus5上面时，瞬间就crash了空指针异常，看了下源代码

<span style="font-size:18px;">/**
* Returns a {@link BluetoothLeAdvertiser} object for Bluetooth LE Advertising operations, o<span style="white-space:pre">	</span>r
* null if Bluetooth LE Advertising is not support on this device.
* <p>
* Use {@link #isMultipleAdvertisementSupported()} to check whether LE Advertising is suppor<span style="white-space:pre">	</span>ted
* on this device before calling this method.
*/
public BluetoothLeAdvertiser getBluetoothLeAdvertiser() {
if (getState() != STATE_ON) {
return null;
}
if (!isMultipleAdvertisementSupported()) {
return null;
}
synchronized(mLock) {
if (sBluetoothLeAdvertiser == null) {
sBluetoothLeAdvertiser = new BluetoothLeAdvertiser(mManagerService);
}
}
return sBluetoothLeAdvertiser;
}
</span>

后来在官网上看了下，现在支持周边的设备只有Nexus6和Nexus9，虽然我很想入手Nexus6，但又不想转运和淘宝，无奈等吧.....说真的在中国开发Android真蛋疼~
最后贴下小代码，欢迎交流指导

<span style="font-size:18px;"> final BluetoothManager bluetoothManager =
(BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
BluetoothAdapter mBluetoothAdapter = bluetoothManager.getAdapter();

BluetoothLeAdvertiser advertiser = mBluetoothAdapter.getBluetoothLeAdvertiser();

AdvertiseData data = new AdvertiseData.Builder()
.addServiceUuid(ParcelUuid.fromString(ADVERTISER_SERVICE_UUID)).build();

AdvertiseSettings settings = new AdvertiseSettings.Builder().setConnectable(true).build();

advertiser.startAdvertising(settings , data, new AdvertiseCallback() {
@Override
public void onStartSuccess(AdvertiseSettings settingsInEffect) {
super.onStartSuccess(settingsInEffect);
}
});</span>

转载请标明出处，多谢