java - 如何在 Android 中将 String[] 转换为 String，反之亦然

Question

我想将 String 数组转换为 String 以便稍后在检索时我可以将 String 解析为 String[] 借助于 (,) 分隔符。

String [] ------------> String
//and later
String ---------------> String[]

有人可以指导如何做到这一点吗？

for (int i = 0; i <= count; i++) {

Log.d(TAG, "arrayData == " +arrayData[i]);

    // Joining:
    String joined = String.join(",", arrayData);
    //This will give error "The method join(String, String[]) is undefined for the type String"
}

Answer 1

您可以使用 String.join StringBuilder和 String.split :

// Joining:
String joined = String.join(",", stringArr);
StringBuilder buffer = new StringBuilder();
for (String each : stringArr)
  buffer.append(",").append(each);
String joined = buffer.deleteCharAt(0).toString();

// Splitting:
String[] splitted = joined.split(",");