【Kotlin字符串处理】使用Uri优化拿取链接数据

1. Android中的Uri与Java中的URI类
2. 出现下列异常的原因是引用的链接存在空格，使用常用trim()方法来去空格。

java.lang.IllegalArgumentException: Illegal character in path at index
52: http://localhost:8080/xxxx/xxx/xxx.do

3. 官方文档索引

1. 如果采用方法一：字符串处理

    
            var url="http://qqq/book?id=1&name=烫烫烫"
            val urlValue = url.substringAfter('?', "")//获取?后的串
            
            val urlParams = urlValue.split("&")
            val urlParams = Bundle()
            urlParams.forEach {
                val param = it.split("=")
                if (param.size == 2) {
                    urlParams.putString(param[0], param[1])
                } 
            }

2. 方法二 使用Uri拼接样例

fun getQueryKeyValueMap(uri: Uri): HashMap {
        val keyValueMap = HashMap()
        var key: String
        var value: String

        val keyNamesList = uri.queryParameterNames
        val iterator = keyNamesList.iterator()

        while (iterator.hasNext()) {
            key = iterator.next() as String
            value = uri.getQueryParameter(key) as String
            keyValueMap.put(key, value)
        }
        return keyValueMap
    }

2.5 例子

            val paramBundle = Bundle()
            var key: String
            var value: String
            val trackerStr = Uri.parse(deeplink.trim())
            val keyNamesList = trackerStr.queryParameterNames
            val iterator = keyNamesList.iterator()
            while (iterator.hasNext()) {
                key = iterator.next() as String
                value = trackerStr.getQueryParameter(key) as String
                paramBundle.putString(key, value)
            }

进一步优化

1. 声明可以放里面
2. 强转可能会出问题，空指针异常。使用toString（kotlin）可解决。
   2.1 若转换目标为null：空对象会变为"null"
   2.2 若转换目标为""：其的意思是一个长度为0的字符串，转换后仍为""
   

        val trackerStr = Uri.parse(deeplink)
            if (trackerStr.toString().isEmpty()) return
            val keyNamesList = trackerStr.queryParameterNames
            val paramBundle = Bundle()
            val iterator = keyNamesList.iterator()
            while (iterator.hasNext()) {
                val key = iterator.next()
                val value = trackerStr.getQueryParameter(key).toString()
                paramBundle.putString(key, value)
            }