How to read 1 line of a text file in server with Android and save its content in a variable?

Question

I want when my app is opened check a file in server for example: mysite/last.txt

and in this file I put last app version like: 3.3

I want every time user opens the my app, first check this file and check if the app version is lower than the version that I put in text file in server, show a dialog or toast message to user for new version if app for example: "a new version is available"

but whenever u upload new verion of apk play automatically lets user know new verion is available — KOTIOS, Aug 15 '13 at 16:19

score 0 · Answer 1 · answered Aug 15 '13 at 16:18

0

perform the check inside the onCreate() method of your main activity

answered Aug 15 '13 at 16:18

Basil

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linux... my text file address is gapiha.com/last-ver.txt – Mojtaba GS3 Aug 15 '13 at 16:42

score 0 · Accepted Answer · edited May 23 '17 at 11:56

0

You could download the files content using a normal Http connection: How do I use the Simple HTTP client in Android?

But why should you want to do this? The play store keeps track of the versions and will show a message if theres an update for your app!

edited May 23 '17 at 11:56

Community

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answered Aug 15 '13 at 16:20

danijoo

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in my country the google play is not worked and my users can't use google play! – Mojtaba GS3 Aug 15 '13 at 16:26

KOTIOS · Answer 3 · 2013-08-15T16:43:19.727

0

onCreate() of ur start activity simply write a asyncTask and in doInBackground method of asyncTask check for ur version if availbale in postexecute of AsyncTask show a toast or notification which ever u want

private class CheckVersion extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(String... params) {


//here ur service goes to check the version of app

    }      

    @Override
    protected void onPostExecute(String result) {               
        // show notification 
    }
}

In onCreate of ur start activity u can call CheckVersion.execute();

edited Aug 15 '13 at 16:43

answered Aug 15 '13 at 16:36

KOTIOS

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how can i do this... please write the code... i'm new to android – Mojtaba GS3 Aug 15 '13 at 16:40
thanks,,, but i need the check text file content ... i don't know how to check!!! – Mojtaba GS3 Aug 15 '13 at 16:44

cafebabe1991 · Answer 4 · 2013-08-17T10:15:09.437

import android.os.Bundle;

public class SomeActivity extends Activity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        new AsyncClass().execute("someurl");
//above line will call the doInBackground()
    }   

    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
    }


private class AsyncClass extends AsyncTask<String,Void,String>{

    @Override
    protected String doInBackground(String url) {


        HttpClient client =new DefaultHttpClient();
        HttpGet getreq =new HttpGet(url);

        HttpResponse resp=client.execute(getreq);

        return parserResponseFromServer(resp);
        //above line will pass the control to onPostExecute()
    }

    private String parseResponseFromServer(HttpResponse response) throws IllegalStateException, IOException {
        // TODO Auto-generated method stub
        BufferedReader reader=new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
        String line_read=null;
        StringBuilder builder=new StringBuilder();
        while((line_read=reader.readLine())!=null){
            builder.append(line_read);
        }
        return builder.toString();
    }


    @Override
    protected void onPostExecute(String result) {
        // TODO Auto-generated method stub

        //HERE the result will be the response from the server.
        `

    }
}

}

put it on server......where you want to read/parse the file..i guess proper way should be you should call the url with the current version and compare it on server by reading.the file as given above..ad return a true or false from your server and depending on that do watever yu feel like . — cafebabe1991, Aug 15 '13 at 17:16
//// put the asynctask code in an inner class insode your activity //and the file reading code goes at your server and what your server responds with will be accessible in doInBackground function ....builder.toString will show the response from server — cafebabe1991, Aug 15 '13 at 17:28
i have edited the code above check it.If that helps you dnt' forget to like it :-) — cafebabe1991, Aug 17 '13 at 10:15

How to read 1 line of a text file in server with Android and save its content in a variable?

4 Answers4