Question

我第一次在kotlin上尝试使用该库，因为我读到要首先进行扫描，我需要使用 implementation "com.polidea.rxandroidble2:rxandroidble:1.10.0"，创建一个RxBleClient并设置扫描参数，但是方法scanBleDevices（）似乎有问题。

我尝试了出现在存储库描述中的代码以及kotlin示例中的代码。

使用描述中的代码，scanBleDevices上只有一个错误

rxBleClient = RxBleClient.create(this)

val scanSubscription = rxBleClient.scanBleDevices(
        new ScanSettings.Builder()
            // .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY) // change if needed
            // .setCallbackType(ScanSettings.CALLBACK_TYPE_ALL_MATCHES) // change if needed
            .build()
        // add filters if needed
)
    .subscribe(
        {
            // Process scan result here.
        },
        {
            // Handle an error here.
        }
    );

// When done, just dispose.
scanSubscription.dispose();

使用kotlin示例中的代码，Observable也出现错误，显示No type arguments expected for class Observable

private fun scanBleDevices(): Observable<ScanResult> {
        val scanSettings = ScanSettings.Builder()
            .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
            .setCallbackType(ScanSettings.CALLBACK_TYPE_ALL_MATCHES)
            .build()

        val scanFilter = ScanFilter.Builder()
             //.setDeviceAddress("B4:99:4C:34:DC:8B")
            // add custom filters if needed
            .build()

        return rxBleClient.scanBleDevices(scanSettings, scanFilter)
}

方法scanBleDevices（）出现问题，该方法提示警报，要求他们正确使用了scanSettings和scanFilter：

None of the following functions can be called with the arguments supplied.
 scanBleDevices(ScanSettings!, vararg ScanFilter!) defined in com.polidea.rxandroidble2.RxBleClient
 scanBleDevices(vararg UUID!) defined in com.polidea.rxandroidble2.RxBleClient

Answer 1

如果编译器抱怨ScanSettings和ScanFilter，那么如果您从com.polidea.rxandroidble2或android.bluetooth.le（或类似）中导入这些类，请检查这些类的包

该库仅接受ScanSettings包中的ScanFilter和com.polidea.rxandroidble2类。

无法使用scanBleDevices进行扫描

1 个答案: