我已经设置了一个带有 BaseAdapter 的 Listview,目前它与 setOnItemClickListener 一起工作正常。但这是硬编码。
Main2Activity.java
String sku[]={"1","2","3","4"};
String name[]={"Bad Food","Very Bad Food","Extremly Bad Food","Super Bad Food"};
String price[]={"99","999","9999","99999"};
String quantity[]={"123","456","789","101112"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
ListView listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(new my_adapter(Main2Activity.this,sku,name,price,quantity));
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Toast.makeText(Main2Activity.this, "Sku->"+sku[i]
+" Name->"+name[i]
+" Price->"+price[i]
+" Quantity->"+quantity[i]
,Toast.LENGTH_SHORT).show();
}
});
}
my_adapter.java
public class my_adapter extends BaseAdapter {
Context ctx;
LayoutInflater inflater=null;
String sku[];
String name[];
String price[];
String quantity[];
public my_adapter(Context ctx, String sku[], String name[], String price[],String quantity[]){
this.ctx=ctx;
this.sku=sku;
this.name=name;
this.price=price;
this.quantity=quantity;
}
@Override
public int getCount() {
return sku.length;
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
View row=view;
if(row==null){
inflater=(LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row=inflater.inflate(R.layout.rows,null);
}
TextView product_sku=(TextView)row.findViewById(R.id.sku);
TextView product_name=(TextView)row.findViewById(R.id.name);
TextView product_price=(TextView)row.findViewById(R.id.price);
TextView product_quantity=(TextView)row.findViewById(R.id.quantity);
product_sku.setText(sku[i]);
product_name.setText(name[i]);
product_price.setText(price[i]);
product_quantity.setText(quantity[i]);
return row;
}
}
接下来,我需要做一些类似的事情,即将 JsonArray 转换为 Array,然后在 setOnItemClickListener 中使用它。 也就是说,我需要将 json 中的所有数据存储到 4 个数组中,然后使用稍后单击该项目时的任何元素。就像我的硬编码示例一样。
我看过一些使用 HashMap 的示例以及一些 JsonArray 到数组模板的编码,但不确定如何将它们与我的 ListView 和 baseAdapter 结合使用。
获取json数据
JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
// working with HashMap or Arraylist?????
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(jsObjRequest);
localhost/web_service/ohno.php
{
"482":["1","Chicken Rice","1","1"], //Unique ID, sku,name,price,quantity
"483":["1","French Fries","1","1"],
"484":["1","apple","1","1"],
"492":["1","western+italian","1","1"],
"493":["1","no_cat","1","1"]
}
我在 Listview 中设置的格式与上面的 Json 格式(4 列)完全相同,除了 Json 格式有一个额外的元素,即唯一产品 ID。
最佳答案
试试这个
public void getJson() {
AsyncHttpClient client = new AsyncHttpClient();
client.get(localhost/web_service/ohno.php, new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
super.onSuccess(statusCode, headers, response);
ArrayList<String> listData = new ArrayList<>();
JSONArray jsonArray482=response.optJSONArray("482");
if (jsonArray482 != null) {
for (int i=0;i<jsonArray482.length();i++){
try {
listData.add(jsonArray482.get(i).toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
});
}
关于Android 使用 BaseAdapter 将 JsonArray 转换为 ListView 中的数组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39433503/