I want to read a text file from a URL, parse, and then set an arraylist and then add it to my adapter. However whenever I try launching the app I'm finding my infos arraylist is not populating with data. I want to know how do I get the application to read data from a URL and then display it. I do have the persmission for INTERNET in the maniifest.
CardAdapter ca = new CardAdapter(createList(0));
recList.setAdapter(ca);
ArrayList<CardInfo> infos = new ArrayList<CardInfo>();
try {
URL url = new URL("https://dl.dropboxusercontent.com/u/56230108/events.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
String line = "";
while ((line = br.readLine()) != null) {
Log.e("value", line);
String[] a = line.split("\\$EV\\$");
CardInfo info = new CardInfo();
info.title = a[0];
info.desc = a[1];
info.date = a[2];
info.time = a[3];
info.contact = a[4];
infos.add(info);
}
br.close();
}
catch(Exception e)
{
}
if(infos.size() > 0)
{
ca.add(infos.get(0), 0);
}
It looks like you are only ever adding a single item to your adapter. Try this for loop instead of the if statement you have, at the bottom of your code:
for(CardInfo info: infos)
{
ca.add(info, 0);
}
you forgot use URLConnection to connect to link.
Related
I have This URL and I want to fetch all the data present in here in an android list view, I only know how to retrieve data from a JSON object but here I don't even know the format of this data present in the URL.
The format of the URL is:
tvg-logo = url of the logo chanel
group-title = category where you need to display the channel (just for movie not for TV)
After the "," you have the name of the channel
And after the name you have the URL of video
How can I parse my data from the URL so that I can make a list view like that:
i think, you must split the String text by special characters. and keep them in an array. for example,the special character might be "[space character]" or "," or "#".
I hope to help you
This function will get the data from URL and you could split your data as per your requirement and populate UI.
void fetchDataFromUrl() {
try {
URL oracle = new URL("http://cinecosta.com/api_tv.php?pass=yojeju123");
URLConnection yc = oracle.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(
yc.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null)
System.out.println(inputLine);
in.close();
} catch (Exception e) {
e.printStackTrace();
}
}
The result seems easy to parse actually.Just see the pattern.
#SOMETHING tvg-logo="logo" tvg-categorie="something"
Use regex for split the pattern you want.
Regex
if you are using retrofit as a network library so you can pass the "ResponseBody" in the api callback function. In onSuccess Method We will get the Body And Use the Following the Code.
Interface Class:
Call<ResponseBody> yourFuncationName();
ResponseBody data = (ResponseBody) model.body();
String json = getStringData(data.byteStream());
Function is
public String getStringData(InputStream inputStream) {
BufferedReader r = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder total = new StringBuilder();
String line;
try {
while ((line = r.readLine()) != null) {
total.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
}
return total.toString();
}
Maybe this will helpful for you.
Try with below code, Here I am extracted only url from the api response
String strData = "#EXTM3U #EXTINF:-1 tvg-logo=\"http://www.cinecosta.com/image-appletv/tv/tf1-tv.png\" tvg-categorie=\"TV\",TF1 http://217.182.164.103:25461/live/YnAmpNBQUX/YUCgme6CXS/314.ts #EXTINF:-1 tvg-logo=\"http://www.cinecosta.com/image-appletv/tv/france2.png\" tvg-categorie=\"TV\",France 2 http://217.182.164.103:25461/live/YnAmpNBQUX/YUCgme6CXS/315.ts #EXTINF:-1 tvg-logo=\"http://www.cinecosta.com/image-appletv/tv/france3.png\" tvg-categorie=\"TV\",France 3 http://217.182.164.103:25461/live/YnAmpNBQUX/YUCgme6CXS/316.ts #EXTINF:-1 tvg-logo=\"http://www.cinecosta.com/image-appletv/tv/france4.png\" tvg-categorie=\"TV\",France 4 http://217.182.164.103:25461/live/YnAmpNBQUX/YUCgme6CXS/317.ts #EXTINF:-1 tvg-logo=\"http://www.cinecosta.com/image-appletv/tv/france5.png\" tvg-categorie=\"TV\",France 5 http://217.182.164.103:25461/live/YnAmpNBQUX/YUCgme6CXS/318.ts";
private void convertDataToArray() {
String[] splitArray = strData.split("#EXTINF:-");
ArrayList<String> arrstrUrl = new ArrayList<String>();
ArrayList<String> arrstrMainUrl = new ArrayList<String>();
ArrayList<String> arrstrCategory = new ArrayList<String>();
ArrayList<String> arrstrName = new ArrayList<String>();
for (int i = 1; i < splitArray.length; i++) {
System.out.println("Final=>" + splitArray[i]);
arrstrUrl.add(splitArray[i].split("1 tvg-logo=")[1].split(" ")[0]);
arrstrMainUrl.add("http" + splitArray[i].split("1 tvg-logo=")[1].split("tvg-categorie=")[1].split("http")[1]);
arrstrName.add(splitArray[i].split("1 tvg-logo=")[1].split("tvg-categorie=")[1].split(",")[0]);
arrstrCategory.add(splitArray[i].split("1 tvg-logo=")[1].split("tvg-categorie=")[1].split(",")[1].split("http")[0]);
}
System.out.println("Final Image=>" + arrstrUrl.toString());
System.out.println("Final Main=>" + arrstrMainUrl.toString());
System.out.println("Final Name=>" + arrstrName.toString());
System.out.println("Final Category=>" + arrstrCategory.toString());
}
So this way, you can get parse your data and update your listview.
Note:- You need to write your own logic to parse this data, by checking data pattern.
The solution for this is :
Either you can scrap the data from python libraries like scrapy or beautiful soup then convert it to json and read from the android.
Parse the html using the jsoup lib (https://jsoup.org/) and model the data in the desire format that you want.
How do I create a "JSONObject" from a local JSON file inside my "raw" folder.
I have the following JSON file under the "raw" folder of my android app project. The file is called "app_currencies.json". I need the information contained on this file as an object in my class. Below are the file contents:
{
"EUR": { "currencyname":"Euro", "symbol":"EUR=X", "asset":"_European Union.png"},
"HTG": { "currencyname":"Haitian Gourde", "symbol":"HTG=X", "asset":"ht.png"},
"WST": { "currencyname":"Samoan Tala", "symbol":"WST=X", "asset":"ws.png"},
"GBP": { "currencyname":"British Pound", "symbol":"GBP=X", "asset":"gb.png"}
}
I think what I need is to use the following:
//Get data from Json file and make it available through a JSONObject
InputStream inputStream = getResources().openRawResource(R.raw.app_currencies.json);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
JSONObject jObject = new JSONObject;
jObject is what I need. I think I need an InputStream, ByteArrayOutputStream so that I can store it into JSONObject... the problem is that I'm not sure how to implement this code properly so that I can access the data? If any of you could give detailed instructions on how to do this, I would really appreciate it.
The following code reads a json file into a Json Array. See if it helps. Note, the file is stored in Assets instead
BufferedReader reader = null;
try {
// open and read the file into a StringBuilder
InputStream in =mContext.getAssets().open(mFilename);
reader = new BufferedReader(new InputStreamReader(in));
StringBuilder jsonString = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
// line breaks are omitted and irrelevant
jsonString.append(line);
}
// parse the JSON using JSONTokener
JSONArray array = (JSONArray) new JSONTokener(jsonString.toString()).nextValue();
// do something here if needed from JSONObjects
for (int i = 0; i < array.length(); i++) {
}
} catch (FileNotFoundException e) {
// we will ignore this one, since it happens when we start fresh
} finally {
if (reader != null)
reader.close();
}
Is there a simplest way to download small text string from URL like this one:"http://app.georeach.com/ios/version.txt"
In iOS its pretty simple. But for android em not finding something good. what is the method for getting text like that from the above URL??
I used this code in onCreate of hello app,n app crashed:
try {
// Create a URL for the desired page
URL url = new URL("http://app.georeach.com/ios/version.txt");
// Read all the text returned by the server
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
StringBuilder sb = new StringBuilder(100);
while ((str = in.readLine()) != null) {
sb.append(str);
// str is one line of text; readLine() strips the newline character(s)
}
in.close();
tv.setText(sb.toString());
} catch (MalformedURLException e) {
tv.setText("mal");
} catch (IOException e) {
tv.setText("io");
}
You have to create a new class extended from AsyncTask. You can't do network stuff in the main thread. It could work but you may not want to do that. Take a look at this link : http://developer.android.com/reference/android/os/AsyncTask.html
Also don't forget to add Internet permissions to your AndroidManifest.xml.
Try this:
URL url = new URL("http://bla-bla...");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
InputStream in = connection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(in));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line);
}
// your text is here
String text = sb.toString()
Do not forget to catch and handle IOException and close all streams.
An "easier" way would be this:
String url2txt = null;
try {
// Being address an URL instance
url2txt = new Scanner(address.openStream(), "UTF-8").useDelimiter("\\A").next();
} catch (IOException e) { ... }
The thing is what you consider "easier". As far as code goes, probably this is the shortest way, but it depends on what you want to do afterwards with the obtained text.
I am developing an android app in netbeans. I am trying to read CSV file using opencsv. When I put the file in resources folder and try to read it from there, there's an error while building saying invalid resource directory. Where should I store csv file so that it can be read each time the app starts?
you should put csv file in assets folder ..
InputStreamReader is = new InputStreamReader(getAssets()
.open("filename.csv"));
BufferedReader reader = new BufferedReader(is);
reader.readLine();
String line;
while ((line = reader.readLine()) != null) {
}
Some advices;
Create an object for holding one row data into the csv. ( Ex: YourSimpleObject . It provides you to manage the data easily.)
Read file row by row and assign to object. Add the object to list. (Ex: ArrayList<YourSimpleObject >)
Code:
private void readAndInsert() throws UnsupportedEncodingException {
ArrayList<YourSimpleObject > objList= new ArrayList<YourSimpleObject >();
AssetManager assetManager = getAssets();
InputStream is = null;
try {
is = assetManager.open("questions/question_bank.csv");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
BufferedReader reader = null;
reader = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
String line = "";
StringTokenizer st = null;
try {
while ((line = reader.readLine()) != null) {
st = new StringTokenizer(line, ",");
YourSimpleObject obj= new YourSimpleObject ();
//your attributes
obj.setX(st.nextToken());
obj.setY(st.nextToken());
obj.setZ(st.nextToken());
obj.setW(st.nextToken());
objList.add(sQuestion);
}
} catch (IOException e) {
e.printStackTrace();
}
}
As an alternative, take a look at uniVocityParsers. It provides a vast number of ways to parse delimited files. The example bellow loads a Csv File (see in the picture below) from a res/raw folder into a InputStream object, and read it in a colunar manner (a map where key=Column & value=ColumnValues).
calendario_bolsa.csv
//Gets your csv file from res/raw dir and load into a InputStream.
InputStream csvInputStream = getResources().openRawResource(R.raw.calendario_bolsa);
//Instantiate a new ColumnProcessor
ColumnProcessor columnProcessor = new ColumnProcessor();
//Define a class that hold the file configuration
CsvParserSettings parserSettings = new CsvParserSettings();
parserSettings.getFormat().setLineSeparator("\n");
parserSettings.setHeaderExtractionEnabled(true);
parserSettings.setProcessor(columnProcessor);
//Creates a new CsvParser, passing the settings into its construtor:
CsvParser csvParser = new CsvParser(parserSettings);
//Calls parse method, instantiating an InputStreamReader, passing to its constructor the InputStream object
csvParser.parse(new InputStreamReader(csvInputStream));
//Gets the csv data as a Map of Column / column values.
Map<String, List<String>> columnarCsv = columnProcessor.getColumnValuesAsMapOfNames();
To add univocityParsers into your Android Project:
compile group: 'com.univocity', name: 'univocity-parsers', version: '2.3.0'
Using opencsv:
InputStream is = context.getAssets().open(path);
InputStreamReader reader = new InputStreamReader(is, Charset.forName("UTF-8"));
List<String[]> csv = new CSVReader(reader).readAll();
you may use this code
try {
InputStream csvStream = assetManager.open(CSV_PATH);
InputStreamReader csvStreamReader = new InputStreamReader(csvStream);
CSVReader csvReader = new CSVReader(csvStreamReader);
String[] line;
// throw away the header
csvReader.readNext();
while ((line = csvReader.readNext()) != null) {
questionList.add(line);
}
} catch (IOException e) {
e.printStackTrace();
}
you may download csvreader file from
http://sourceforge.net/projects/opencsv/files/latest/download
and import in your project
I got a bit of a Problem with my App, i use a .txt File for getting the right URL's to Display my Pictures that the App should show. Everything works fine. But if i change the Content of the Remote .txt File the App keeps loading the same Pictures again. Here is the code for getting the Pics from remote.
private ArrayList<String> getPictures(){
fileList.clear();
try {
URL url = new URL("http://server.com/test.txt");
BufferedReader in = new BufferedReader(new InputStreamReader(
url.openStream()));
String str;
while ((str = in.readLine()) != null) {
fileList.add(str);
}
in.close();
} catch (MalformedURLException te) {
finish();
} catch (IOException tt) {
finish();
}
return fileList;
}
So i don't have a clue why it isn't getting the new content for i clear the ArrayList each time the method is called!
I hope someone has a Solution for this Problem, it's pretty anoying.
/edit: forgot to post the Method containing the Adapter, so here it is:
private String getAnImageUrl() {
getPictures();
ArrayAdapter<String> arrAdapt = new ArrayAdapter<String>(this, R.layout.main, fileList);
arrAdapt.setNotifyOnChange(true);
i++;
if (i >= arrAdapt.getCount()) {
i = 0;
}
return test = arrAdapt.getItem(i).toString();
}
Yeah, I experienced this with my own app downloading some JSON. The easiest way to fix it is to add a random parameter to your URL request like so:
String urlString = "http://server.com/test.txt?" + System.currentTimeMillis();
URL url = new URL(urlString);
Which will add the current system time to your url as a parameter, which will bypass any cached version of the page