Java 使用volley进行网络操作时如何显示ProgressDialog
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How to display the ProgressDialog when do network operations using volley
提问by N Sharma
I am Woking on an android application where I am very interested to use volleylibrary to perform the network http calls.
我正在使用一个 android 应用程序，我对使用volley库来执行网络 http 调用非常感兴趣。
But my question I found that this library do operations in different background thread then How I can showProgressDialogwhen http request start to execute then later dismiss it once it has executed.
但是我的问题是，我发现这个库在不同的后台线程中执行操作，然后如何显示ProgressDialoghttp 请求何时开始执行，然后在执行后将其关闭。
RequestQueue rq = Volley.newRequestQueue(this);
StringRequest postReq = new StringRequest(Request.Method.POST, "http://httpbin.org/post", new Response.Listener<String>() {
@Override
public void onResponse(String response) {
tv.setText(response); // We set the response data in the TextView
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.println("Error ["+error+"]");
}
});
Thanks in advance.
提前致谢。
采纳答案by Hungry Coder
It's pretty straight forward. Start the progress dialog once you add the request object in the queue.
这很直接。在队列中添加请求对象后启动进度对话框。
//add the request to the queue
rq.add(request);
//initialize the progress dialog and show it
progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("Fetching The File....");
progressDialog.show();
Then dismiss the dialog once you have received the response from the server.
然后在收到服务器的响应后关闭对话框。
StringRequest postReq = new StringRequest(Request.Method.POST, "http://httpbin.org/post", new Response.Listener<String>() {
@Override
public void onResponse(String response) {
tv.setText(response); // We set the response data in the TextView
progressDialog.dismiss();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(“Volly Error”,”Error: ”+error.getLocalizedMessage());
progressDialog.dismiss();
}
});
