我想在我的android项目中使用jsoup。我以这种方式将我的jsoup添加到我的项目中:
在项目的根目录中创建了一个名为libs的文件夹,并将我的jar文件放在那里。然后我转到项目属性,在Java Build Path>下库并在libs文件夹下单击Add JARs ...和选择的jsoup jar文件。
一切都很好但是当我试图在模拟器上运行时,应用程序说[不幸的是,天气BD已停止]它显示我下面的错误:LogCat
我的Jsoup代码(我在扩展Fragment的类下创建了一个内部类AsyncTaskParser。)
private class AsyncTaskParser extends AsyncTask<Void, Void, Boolean> {
CustomProgressBar progress;
@Override
protected void onPreExecute() {
super.onPreExecute();
progress = new CustomProgressBar(getActivity());
progress.setCancelable(true);
progress.setIndeterminate(true);
progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progress.show();
}
@Override
protected Boolean doInBackground(Void... arg0) {
publishProgress();
return true;
}
@Override
protected void onProgressUpdate(Void... value) {
jsupDataRecevier();
bmdAdapter = new BMDListAdapter(getActivity(), city_name, minTemp,
maxTemp, sunSet, sunRise);
list.setAdapter(bmdAdapter);
progress.dismiss();
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
if (result == true) {
// Log.e(getClass().getName(), "Json Parsing Succesfull");
} else {
Toast.makeText(getActivity(),
"Sorry unable to get data, Try again later",
Toast.LENGTH_LONG).show();
}
}
public void jsupDataRecevier() {
String html = "http://www.bmd.gov.bd/?/home/";
Document doc;
try {
doc = Jsoup.connect(html).get();
Elements link = doc.select("div").attr("class", "forecastbox ");
String linkText = link.text();
linkText = linkText.substring(0, linkText.indexOf("| Bangladesh"));
linkText = linkText.replace("| ", "--");
String modifiedText[] = linkText.split("--");
int j;
boolean flag = true; // will determine when the sort is finished
String temp;
while (flag) {
flag = false;
for (j = 0; j < modifiedText.length - 1; j++) {
if (modifiedText[j]
.compareToIgnoreCase(modifiedText[j + 1]) > 0) { // ascending
// sort
temp = modifiedText[j];
modifiedText[j] = modifiedText[j + 1]; // swapping
modifiedText[j + 1] = temp;
flag = true;
}
}
}
Scanner inp;
for (int i = 0; i < modifiedText.length; i++) {
inp = new Scanner(modifiedText[i].trim());
String distric = modifiedText[i].substring(0,
modifiedText[i].indexOf(':'));
city_name.add(distric);
inp = new Scanner(modifiedText[i].substring(
modifiedText[i].indexOf(":"), modifiedText[i].length()));
inp.next();
String maxTemperature = inp.next();
maxTemperature = inp.next().substring(0, 4);
maxTemp.add(maxTemperature);
String minTemperature = inp.next() + inp.next();
minTemperature = inp.next().substring(0, 4);
minTemp.add(minTemperature);
inp.next();
inp.next();
inp.next();
String sunrise = inp.next().replace('-', ':') + " "
+ inp.next();
sunRise.add(sunrise);
inp.next();
inp.next();
inp.next();
String sunset = inp.next().replace('-', ':') + " " + inp.next();
sunSet.add(sunset);
}
} catch (IOException ex) {
Toast.makeText(getActivity(), "Sorry try again later",
Toast.LENGTH_LONG).show();
Intent homeIntent = new Intent(getActivity(), MainActivity.class);
startActivity(homeIntent);
}
}
}
LogCat表示在方法jsupDataRecevier()
中,此行doc = Jsoup.connect(html).get();
存在问题。我不明白我做错了什么。
答案 0 :(得分:1)
您无法在UI线程中运行网络请求。您从jsupDataRecevier();
调用onProgressUpdate()
运行在UI线程中,它违反了上述策略。你应该在doInBackground()
我从您的AsyncTask代码中了解到,您并不了解AsyncTask生命周期&amp;如何正确使用。如需快速查看,请查看此AsyncTask Tutorial