Reading and Writing json in android

Reading and Writing json in android

Reading json in android

1. Read the Json content in the json File

First, put the json file under the directory assets:

Test. json

 

{programmers:[{firstName:Brett,lastName:McLaughlin,email:aaaa},{firstName:Jason,lastName:Hunter,email:bbbb},{firstName:Elliotte,lastName:Harold,email:cccc}],authors:[{firstName:Isaac,lastName:Asimov,genre:sciencefiction},{firstName:Tad,lastName:Williams,genre:fantasy},{firstName:Frank,lastName:Peretti,genre:christianfiction}],musicians:[{firstName:Eric,lastName:Clapton,instrument:guitar},{firstName:Sergei,lastName:Rachmaninoff,instrument:piano}],cat:test}

Read from main. java

 

 

Try {InputStreamReader isr = new InputStreamReader (getAssets (). open (test. json), UTF-8); // open test. json BufferedReader br = new BufferedReader (isr); // read isr String line; StringBuilder builder = new StringBuilder (); while (line = br. readLine ())! = Null) {builder. append (line);} br. close (); isr. close (); JSONObject root = new JSONObject (builder. toString (); System. out. println (root. getString (cat); JSONArray arry = root. getJSONArray (programmers); for (int I = 0; I display result:
 
To read the given Json data:
Values can be directly attached.
 
// JSONObject root = new JSONObject (builder. toString (); Replace with-> JSONObject root = new JSONObject ({'grammers ': [{'firstname': 'brett', 'lastname': 'mclaughlin ', 'email ': 'aaa'}]});
2. Create data in JSON format

JSONObject root1=new JSONObject(); try { root1.put(cat,it); JSONObject lan1=new JSONObject(); lan1.put(id,1); lan1.put(ide,android); lan1.put(name,java); JSONObject lan2=new JSONObject(); lan1.put(id,2); lan1.put(ide,xcod); lan1.put(name,ios); JSONObject lan3=new JSONObject(); lan1.put(id,3); lan1.put(ide,vs); lan1.put(name,C#); JSONArray array=new JSONArray(); array.put(lan1); array.put(lan2); array.put(lan3); root1.put(programmers,array); System.out.println(root1.toString()); } catch (JSONException e) { e.printStackTrace(); } } 

Display result: