How to replace char inside double quotes in android

Question

In my Android app, I want to change the value of a String between double quotes. For example, I want to replace {"txt": with {"":

I have tried the following regex expressions, but they don't work...

    String abc=replace(str, "{\\txt\\:", "");
    String abc=replace(str, "{'txt':", "");...,etc

Could anyone please offer help with this.

Answer 1

You need to escape each double-quote using a backslash.

Your question is a little ambiguous, so I'll cover the two most reasonable interpretations of it:

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If you want to replace {"txt": with "" (as stated in your question) then use this:

String abc = str.replace("{\"txt\":", "\"\"");

With this code the text {"txt":foo} becomes ""foo} .

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If you want to replace {"txt": with the empty string (as implied by your example code) then use this:

String abc = str.replace("{\"txt\":", "");

With this code the text {"txt":foo} becomes foo} .

Answer 2

"{\\\\txt\\\\:"表示字符串{\\txt\\ ，如果要匹配（并因此替换） {"txt"使用"{\\"txt\\":"