如何在Android中将String []转换为String，反之亦然

Question

我想转换一个String数组到String ，以便以后在检索我可以解析String到String[]与（的帮助下, ）分隔。

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

有人可以指导如何做到这一点？

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(",");