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