这是我的代码：
private void downloadSupplyTownData(final int townId2) {
/*******************
* Using Volley
*******************/
// Post params to be sent to the server
HashMap<String, Object> params = new HashMap<String, Object>();
params.put("ID",townId2);
CustomDialogClass.showProgressDialog(context,true);
JsonObjectRequest req = new JsonObjectRequest(Consts.baseUrl+Consts.townSupplyUrl, new JSONObject(params),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
totalConsumerRecords = Integer.parseInt(response.getString("TotalConsumerRecords").trim());
if(totalConsumerRecords>0)
{
/**For -----**/
JSONArray dtrArray = response.getJSONArray("xxx");
for(int i=0;i<dtrArray.length();i++)
{
JSONObject dtrObj = dtrArray.getJSONObject(i);
supplyId1 = Integer.parseInt(dtrObj.getString("SI"));
dtrId = Integer.parseInt(dtrObj.getString("DI"));
dtrImgUrl = dtrObj.getString("DIMG");
dtrCode = dtrObj.getString("DC");
assetPCode = dtrObj.getString("APC");
meterSN = dtrObj.getString("MSN");
System.out.println(dtrId);
db.addDtrInfo(new DTRBeanClass(dtrId,supplyId1,dtrCode,dtrImgUrl,assetPCode,meterSN));
}
/**For ----**/
JSONArray poleArray = response.getJSONArray("Pole");
for(int i=0;i<poleArray.length();i++)
{
JSONObject poleObj = poleArray.getJSONObject(i);
poleId = Integer.parseInt(poleObj.getString("PI"));
dtrId1 = Integer.parseInt(poleObj.getString("DI"));
consumerCount = Integer.parseInt(poleObj.getString("ACA"));
poleImgUrl = poleObj.getString("PIMG");
poleCode = poleObj.getString("PC");
surveyerRemarks = poleObj.getString("RMS");
System.out.println(poleId);
db.addPoleInfo(new PoleBeanClass(poleId,dtrId1,poleCode,poleImgUrl,consumerCount,surveyerRemarks));
}
/**For ----**/
JSONArray consumerArray = response.getJSONArray("Supply");
for(int i=0;i<consumerArray.length();i++)
{
JSONObject supplyObj = consumerArray.getJSONObject(i);
supplyId = Integer.parseInt(supplyObj.getString("SI"));
supplyTownId = Integer.parseInt(supplyObj.getString("TI"));
supplyName = supplyObj.getString("SN");
System.out.println(supplyId);
db.addSupplierInfo(new SupplierChainBeanClass(supplyId,supplyTownId,supplyName));
}
CustomDialogClass.showProgressDialog(context,false);
}
else
{
CustomDialogClass.showProgressDialog(context,false);
}
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
NetworkResponse networkResponse = error.networkResponse;
VolleyLog.e("Error: ", error.getMessage());
Log.d("Eroor", ""+networkResponse);
CustomDialogClass.showProgressDialog(context,false);
}
});
// add the request object to the queue to be executed
NameApplication.getInstance().addToRequestQueue(req);
}
此处按CustomDialogClass.showProgressDialog(context,true);
进度对话框先旋转2-3秒然后卡住。请帮我解决这个问题。
修改
/ ** *显示对话框 * * / @覆盖 protected Dialog onCreateDialog（int id）{ switch（id）{ case progress_bar_type：//我们将其设置为0 pDialog = new ProgressDialog（this）; pDialog.setMessage（“正在下载文件。请稍候...”）; pDialog.setIndeterminate（假）; pDialog.setMax（100）; pDialog.setProgressStyle（ProgressDialog.STYLE_HORIZONTAL）; pDialog.setCancelable（真）; pDialog.show（）; 返回pDialog; 默认： return null; } }
/**
* Background Async Task to download file
* */
class DownloadFileFromURL extends AsyncTask<String, String, String> {
/**
* Before starting background thread
* Show Progress Bar Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(progress_bar_type);
}
/**
* Downloading file in background thread
* */
@Override
protected String doInBackground(String... f_url) {
downloadSupplyTownData(townId);
return null;
}
/**
* Updating progress bar
* */
protected void onProgressUpdate(String... progress) {
// setting progress percentage
pDialog.setProgress(Integer.parseInt(progress[0]));
}
/**
* After completing background task
* Dismiss the progress dialog
* **/
@Override
protected void onPostExecute(String file_url) {
dismissDialog(progress_bar_type);
}
}
从视图中调用AsynchTask new DownloadFileFromURL().execute();
答案 0 :(得分：7)
进度对话框先旋转2-3秒然后卡住。
因为解析了json响应和downloadConsumerData方法从主UI线程发出api请求。
在网络请求完成时，在主要UI线程上调用的Volley onResponse方法作为回调方法。
要在onResponse方法中解析请求响应，请使用AsyncTask类，并在ProgressDialog方法中调用onPostExecute解除方法，该方法将在Volley请求时关闭ProgressDialog，解析json数据和downloadConsumerData方法作业在后台线程
从onResponse方法启动AsyncTask：
@Override
public void onResponse(JSONObject response) {
new DownloadFileFromURL().execute(response);
}
在doInBackground处理JSON数据中：
@Override
protected String doInBackground(String... f_url) {
totalConsumerRecords = Integer.parseInt(response.getString
("TotalConsumerRecords").trim());
// add all code here from onResponse
downloadSupplyTownData(townId);
return null;
}