android中的json二之json的讀寫

android中的json的讀取

1.讀取Json文件中的json內容

首先在將json文件放在目錄assets下：

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}

 try {
            InputStreamReader isr=new InputStreamReader(getAssets().open(test.json),UTF-8);//打開test.json
            BufferedReader br=new BufferedReader(isr);//讀取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

顯示結果：
 
如要讀取給定Json數據：
  可直接將值附上
 


//JSONObject root=new JSONObject(builder.toString());換成-》 JSONObject root=new JSONObject({'programmers':[{'firstName':'Brett','lastName':'McLaughlin','email':'aaaa'}]}); 

2.創建JSON格式數據

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(); } }