使用 volley 获取 json 对象和数组 [英] fetching json objects and array using volley
问题描述
我正在尝试获取以下 JSONArray 对象.有 2 个项目，但通过我实现的循环，我只能获取 1 个项目.我使用了 2 个 for 循环.如何解决?有没有其他方法可以获取所有数据?如果我从 -1 开始 for 循环，那么它会显示数组索引越界.
I am trying to fetch the below JSONArray objects. There are 2 items but with the loop I have implemented, I am able to fetch only 1 item. I have used 2 for loops. How to resolve it? Is there any other way of fetching all the data? If I start the for loop from -1 then it shows array index out of bounds.
JSON 结构如下
{
"status": 200,
"list": [
{
"quot_uid": "QUOTE2018@1",
"id": "1",
"expiry_date": "2018-05-29",
"created_at": "2018-05-22 11:45:58",
"left_days": "9",
"items": [
{
"ITEM_NAME": "Copper Wires",
"UNIT": "MT",
"qty": "5",
"make": null
},
{
"ITEM_NAME": "OFC Cables",
"UNIT": "MT",
"qty": "2",
"make": null
}
]
}
]
}
这是我已经尝试过的代码
And this is the code which I'm already tried
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("list");
tv.removeAllViewsInLayout();
int flag = 1;
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject1 = jsonArray.getJSONObject(i);
JSONArray jsonArray1 = jsonObject1.getJSONArray("items");
for (int j = 0; j < jsonArray1.length(); j++) {
TableRow tr = new TableRow(Main2Activity.this);
tr.setLayoutParams(new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT));
if (flag == 1) {
TextView t1 = new TextView(Main2Activity.this);
t1.setPadding(10, 30, 10, 30);
t1.setText("ITEM NAME");
t1.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);
t1.setTop(20);
t1.setTextColor(Color.BLACK);
t1.setTextSize(15);
t1.setTypeface(null, Typeface.BOLD);
tr.addView(t1);
TextView t2 = new TextView(Main2Activity.this);
t2.setPadding(10, 30, 10, 30);
t2.setText("QTY");
t2.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);
t2.setTop(20);
t2.setTextColor(Color.BLACK);
t2.setTextSize(15);
t2.setTypeface(null, Typeface.BOLD);
tr.addView(t2);
tv.addView(tr);
final View vline = new View(Main2Activity.this);
vline.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, 10));
vline.setBackgroundColor(Color.BLUE);
tv.addView(vline);
flag = 0;
} else {
JSONObject jsonObject2 = jsonArray1.getJSONObject(j);
TextView tv1 = new TextView(Main2Activity.this);
tv1.setPadding(5, 30, 5, 30);
String item_nm = jsonObject2.getString("ITEM_NAME");
tv1.setText(item_nm);
tv1.setTextColor(Color.BLACK);
tv1.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);
tv1.setTextSize(15);
tr.addView(tv1);
TextView tv2 = new TextView(Main2Activity.this);
tv2.setPadding(5, 30, 5, 30);
String item_qty = jsonObject2.getString("qty");
tv2.setText(item_qty);
tv2.setTextColor(Color.BLACK);
tv2.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);
tv2.setTextSize(15);
tr.addView(tv2);
tv.addView(tr);
final View vline1 = new View(Main2Activity.this);
vline1.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, 1));
vline1.setBackgroundColor(Color.rgb(1, 132, 143));
tv.addView(vline1);
}
推荐答案
试试这个对我有用.我只是给出了完整的架构打印或使用您想要的值作为您的要求，对于我记录了几个值的示例.
Try this it works for me. I just gave the complete architecture print or use the value you wanted as your requirement, for a sample I Logged few values.
主要区别是我用过
JSONObject listObj1=new JSONObject(jsonArray.get(i).toString());
代替你的线路
JSONObject listObj1=newjsonArray.getJSONObject(i);
完整的代码框架如下.我在字符串中使用了您的 JSON，而不是从响应中获取，如果有效，请尝试一下，然后将其更改为响应.对我来说效果很好.
The complete code skeleton is below. I used your JSON in a String instead taking from a response, try it if it works then change it to a response. It works well for me.
String response="{'status':200,'list':[{'quot_uid':'QUOTE2018@1','id':'1','expiry_date':'2018-05-29','created_at':'2018-05-2211:45:58','left_days':'9','items':[{'ITEM_NAME':'CopperWires','UNIT':'MT','qty':'5','make':null},{'ITEM_NAME':'OFCCables','UNIT':'MT','qty':'2','make':null}]}]}";
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(response);
String status=jsonObject.get("status").toString();
Log.e("Status is ",status);
JSONArray jsonArray = jsonObject.getJSONArray("list");
for(int i=0;i<jsonArray.length();i++){
//In this loop, you will parse all the array elements inside list array
JSONObject listObj1=new JSONObject(jsonArray.get(i).toString());
String qoutid= listObj1.getString("quot_uid");
Log.e("quot uid is ",qoutid);
JSONArray lisItems=listObj1.getJSONArray("items");
for(int j=0;j<lisItems.length();j++){
JSONObject innerObj=new JSONObject(lisItems.get(j).toString());
String ITEM_NAME=innerObj.getString("ITEM_NAME");
Log.e("TAG",ITEM_NAME);
}
}
} catch (JSONException e) {
Log.e("TAG","Error "+e.toString());
e.printStackTrace();
}
还要检查错误日志，因为它会返回任何 JSON 解析错误
check error log as well because it will return JSON parse error any
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