无法将字符串转换为Map Android

String str = "key1=value1,key2=value2,key3=value3";
Map<String, String> map = new HashMap<>();

// 分割字符串
String[] pairs = str.split(",");
for (String pair : pairs) {
    // 分割键值对
    String[] keyValue = pair.split("=");
    if (keyValue.length == 2) {
        String key = keyValue[0];
        String value = keyValue[1];
        map.put(key, value);
    }
}

// 使用Map
String value1 = map.get("key1");
String value2 = map.get("key2");
String value3 = map.get("key3");