Convert normal Java Array or ArrayList to Json Array in android

Question

Is there any way to convert a normal Java array or ArrayList to a Json Array in Android to pass the JSON object to a webservice

User · Answer

you need external library     json-lib-2 2 2-jdk15 jar  List mybeanList   new ArrayList    mybeanList add  S    mybeanList add  b     JSONArray jsonA   JSONArray fromObject mybeanList   System out println jsonA     Google Gson is the best library http   code google com p google-gson

User · Answer

ArrayList lt String gt  list   new ArrayList lt String gt     list add  blah    list add  bleh    JSONArray jsArray   new JSONArray list     This is only an example using a string arraylist

User · Answer

If you want or need to work with a Java array then you can always use the java util Arrays utility classes  static asList   method to convert your array to a List   Something along those lines should work   String mStringArray        String1    String2      JSONArray mJSONArray   new JSONArray Arrays asList mStringArray      Beware that code is written offhand so consider it pseudo-code

User · Answer

My code to convert array to Json  Code  List lt String gt a   new ArrayList lt String gt     a add  so 1    a add  so 2    a add  so 3    JSONArray jray   new JSONArray a    System out println jray toString        output    so 1   so 2   so 3

User · Answer

For a simple java String Array you should try   String arr str         value1     value2    value3      JSONArray arr strJson   new JSONArray Arrays asList arr str    System out println arr strJson toString       If you have an Generic ArrayList of type String like ArrayList lt String gt   then you should try   ArrayList lt String gt  obj list   new ArrayList lt  gt         obj list add  value1        obj list add  value2        obj list add  value3      JSONArray arr strJson   new JSONArray obj list      System out println arr strJson toString

User · Answer

This is the correct syntax   String arlist1         value1     value2    value3     JSONArray jsonArray1   new JSONArray arlist1

User · Answer

Convert ArrayList to JsonArray   Like these    quot title quot   quot value1 quot      quot title quot   quot value2 quot    Example below   Model class having one param title and override toString method class Model      var title  String      var id  Int   -1             override fun toString    String           return  quot    quot title  quot    quot  title  quot   quot           create List of model class and print toString var list  ArrayList lt Model gt    list add  quot value1 quot   list add  quot value2 quot   Log d TAG  list toString     and Here is your output    quot title quot   quot value1 quot      quot title quot   quot value2 quot

User · Answer

example key    Name   value    Xavier  and the value depends on number of array you pass in   try               JSONArray jArry new JSONArray          for  int i 0 i lt 3 i                   JSONObject jObjd new JSONObject           jObjd put  key   value          jObjd put  key   value          jArry put jObjd                 Log e  Test   jArry toString              catch JSONException ex

[java] Convert normal Java Array or ArrayList to Json Array in android

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