蓝牙外设ADVERTISE_FAILED_DATA_TOO_LARGE
蓝牙外设ADVERTISE_FAILED_DATA_TOO_LARGE
提问于 2015-07-18 19:22:46
我试图在Nexus9中做广告，但得到了ADVERTISE_FAILED_DATA_TOO_LARGE的错误。当我在成功广告后添加服务时，它工作得非常好，但如果我通过广告数据构建器添加服务，以便其他设备可以在扫描时过滤，我会得到错误代码1，即ADVERTISE_FAILED_DATA_TOO_LARGE
a)工作代码
public void startAdvertisingService() {
AdvertiseSettings settings = new AdvertiseSettings.Builder()
.setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
.setTimeout(0)
.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY)
.build();
AdvertiseData.Builder advertiseData = new AdvertiseData.Builder();
advertiseData.setIncludeDeviceName(true);
BluetoothLeAdvertiser myBluetoothLeAdvertiser = btAdapter.getBluetoothLeAdvertiser();
myBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback);
myBluetoothLeAdvertiser.startAdvertising(settings, advertiseData.build(),mAdvertiseCallback);
}
private AdvertiseCallback mAdvertiseCallback = new AdvertiseCallback() {
@Override
public void onStartSuccess(AdvertiseSettings settingsInEffect) {
super.onStartSuccess(settingsInEffect);
BLEBroadcast();
}
@Override
public void onStartFailure(int errorCode) {
String description = "";
if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_FEATURE_UNSUPPORTED)
description = "ADVERTISE_FAILED_FEATURE_UNSUPPORTED";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_TOO_MANY_ADVERTISERS)
description = "ADVERTISE_FAILED_TOO_MANY_ADVERTISERS";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_ALREADY_STARTED)
description = "ADVERTISE_FAILED_ALREADY_STARTED";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_DATA_TOO_LARGE)
description = "ADVERTISE_FAILED_DATA_TOO_LARGE";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_INTERNAL_ERROR)
description = "ADVERTISE_FAILED_INTERNAL_ERROR";
else description = "unknown";
}
};并且还添加了服务：
void BLEBroadcast() {
BluetoothGattCharacteristic characteristic = new BluetoothGattCharacteristic(characteristicUUID, BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_INDICATE | BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE, BluetoothGattCharacteristic.PERMISSION_READ | BluetoothGattCharacteristic.PERMISSION_WRITE);
BluetoothGattDescriptor desc = new BluetoothGattDescriptor(descriptorUUID, BluetoothGattDescriptor.PERMISSION_READ | BluetoothGattDescriptor.PERMISSION_WRITE);
desc.setValue("".getBytes());
characteristic.addDescriptor(desc);
BluetoothGattService service = new BluetoothGattService(serviceUUID, BluetoothGattService.SERVICE_TYPE_PRIMARY);
service.addCharacteristic(characteristic);
mGattServer.addService(service);
}b)最初添加服务时不起作用，以便中心可以通过过滤器发现：
在调用startAdvertisingService()之前调用BLEBroadcast()函数，并添加
AdvertiseData.Builder advertiseData = new AdvertiseData.Builder();
advertiseData.addServiceUuid(new ParcelUuid(serviceUUID)); 给出广告失败，错误代码为% 1。
回答 3
Stack Overflow用户
回答已采纳
发布于 2015-07-20 19:01:25
我怀疑这就是导致问题的代码行：
advertiseData.setIncludeDeviceName(true);通告将没有足够的空间同时容纳设备名称和16字节的服务UUID。因此，如果您包含上述内容，则添加：
advertiseData.addServiceUuid(new ParcelUuid(serviceUUID)); 您将得到您所描述的错误。尝试删除第一行。
Stack Overflow用户
发布于 2017-06-12 18:23:39
基本上你的数据超过了31个字节，所以你需要减少它。
将其更改为false，则它将起作用：
advertiseData.setIncludeDeviceName(false);Stack Overflow用户
发布于 2018-08-02 16:47:05
您可以将设备的名称更改为更短的名称。示例: XYZ_Name_pic -> XYZ
进入蓝牙->设置->重命名设备名称
或者您可以传递false而不是true
advertiseData.setIncludeDeviceName( false )；//传入false不为true
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原文链接：
https://stackoverflow.com/questions/31490649
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