如何检查设备是否支持 BLE Gatt 客户端模式？

Question

In android, I have used BLE both mode as Peripheral and Client. But I want to check isBLeGattClientSupported()

As we know some devices in android are not capable to act as BLE Gatt Client so jut wants to throw an exception that such device is not able to act as client.

I have the rest of the past for BLE my code is working fine for both mode, but stuck when I said to my device to act as a client and that device is not capable to act as the client.

Answer 1

This is straight from the android developer guide -

at run-time you can determine BLE availability by using PackageManager.hasSystemFeature():

The java example provided (a Kotlin example is also on the same page) to check the same is as follows -

if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
    Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT).show();
    finish();
}

This way you can check if your device supports BLE and throw an exception as required

Answer 2

所有具有运行 Android 4.3 以上版本的蓝牙芯片（4.0 及更高版本）的 Android 设备都支持 BLE，并且所有这些设备都支持充当BluetoothGatt客户端以及文档中提到的BluetoothGattServer 。