要浮动解析替换的LiveData

Question

我使用的是谷歌采购库，我通过LiveData使用价格。价格标签：看起来是20.99美元。我必须解析这些数据，只打印20.99。为此，我认为需要将LiveData字符串数据转换为浮点或整数。我该怎么做？

static public class SkuDetails {
    final public String sku;
    final public LiveData<String> title;
    final public LiveData<String> description;
    final public LiveData<String> price;
    final public int iconDrawableId;

    SkuDetails(@NonNull String sku, TrivialDriveRepository tdr) {
        this.sku = sku;
        title = tdr.getSkuTitle(sku);
        description = tdr.getSkuDescription(sku);
        price = tdr.getSkuPrice(sku);
        iconDrawableId = skuToResourceIdMap.get(sku);
    }
}

BillingClient；

public final LiveData<String> getSkuPrice(String sku) {
    LiveData<SkuDetails> skuDetailsLiveData = skuDetailsLiveDataMap.get(sku);
    assert skuDetailsLiveData != null;
    return Transformations.map(skuDetailsLiveData, SkuDetails::getPrice);
}

Answer 1

一旦分配了LiveDataprice，您可以这样做。

// get the string value from "price" LiveData
        String strPrice = price.getValue();

        //remove dollar sign from this price
        String priceWithoutDollarSign = strPrice.replaceAll("[^\\d.]", "");

        //convert/parse it as float just in-case needed otherwise priceWithoutDollarSign will be enough
        float resultPrice = Float.parseFloat(priceWithoutDollarSign);