我的问题是如何添加消息“正在加载,请稍候”。直到发出请求并将响应解析到表中。
有使用这种方法的方法吗?
像这样,当我运行此程序时,我不知道是否没有响应数据或尚未收到响应。
StringRequest postRequest = new StringRequest(Request.Method.POST, apiURL,
new Response.Listener<String>()
{
@Override
public void onResponse(String response) {
try {
JSONObject jsonObj = new JSONObject(response);
JSONArray jsonArray = jsonObj.getJSONArray("sales");
for (int i=0;i<jsonArray.length();i++){
JSONObject employee = jsonArray.getJSONObject(i);
TableRow tbrow = new TableRow( MainActivity.this );
TextView t1v = new TextView(MainActivity.this);
t1v.setText(employee.getString("saletype"));
t1v.setTextColor(Color.BLACK);
stk.addView(tbrow);
// .......
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
}
}
) {
@Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<String, String>();
Spinner spinner = (Spinner) findViewById(R.id.spinner);
params.put("store", spinner.getSelectedItem().toString());
return params;
}
};
mQueue.add(postRequest);
答案 0 :(得分:1)
在队列中添加请求对象时显示进度栏。
mQueue.add(postrequest);
progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("Loading ...Please Wait");
progressDialog.show();
然后在收到响应时将其关闭。
try {
JSONObject jsonObj = new JSONObject(response);
JSONArray jsonArray = jsonObj.getJSONArray("sales");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject employee = jsonArray.getJSONObject(i);
TableRow tbrow = new TableRow(MainActivity.this);
TextView t1v = new TextView(MainActivity.this);
t1v.setText(employee.getString("saletype"));
t1v.setTextColor(Color.BLACK);
stk.addView(tbrow);
// .......
}
progressDialog.dismiss();
} catch (Exception e) {
progressDialog.dismiss();
}
还
@Override
public void onErrorResponse(VolleyError error) {
progressDialog.dismiss();
}