aprire un file .txt da res/raw

[spampy78]

no forse non ci stiamo capendo

private String inputStreamToString(InputStream helpfile) {
// TODO Auto-generated method stub
return null;
}

questa funzione dovrebbe ritornare la stringa con cui vuoi valorizzare la textview. guarda prova a far ritornare una stringa fissa, tipo return "testo di prova"

[Anular]

Se inserisco return "testo di prova" funzia.

[spampy78]

e certo.... in quella funzione devi tu scrivere il codice che ti estrae il testo dall'inputstream, ho fatto una rapida ricerca su google e ho trovato il seguente codice, vedi se lo puoi adattare alle tue esigenze

    public String convertStreamToString(InputStream is)
            throws IOException {
        /*
         * To convert the InputStream to String we use the
         * Reader.read(char[] buffer) method. We iterate until the
         * Reader return -1 which means there's no more data to
         * read. We use the StringWriter class to produce the string.
         */
        if (is != null) {
            Writer writer = new StringWriter();

            char[] buffer = new char[1024];
            try {
                Reader reader = new BufferedReader(
                        new InputStreamReader(is, "UTF-8"));
                int n;
                while ((n = reader.read(buffer)) != -1) {
                    writer.write(buffer, 0, n);
                }
            } finally {
                is.close();
            }
            return writer.toString();
        } else {        
            return "";
        }
    }

[Anular]

Ok, teoricamente l'ho capito. Sto provando ad implementarlo ma ho delle difficoltà, in particolare con i metodi autogenerati try/catch.

<br /> setContentView(R.layout.help);<br /> InputStream helpfile = getResources().openRawResource(R.raw.quizhelp);<br /> TextView helpText = (TextView) findViewById(R.id.helptext);<br /> String helpstring;<br /> try {<br /> helpstring = inputStreamToString(helpfile);<br /> helpText.setText(helpstring);<br /> } catch (IOException e) {<br /> // TODO Auto-generated catch block<br /> e.printStackTrace();<br /> }<br />

Ho dovuto implementarli xkè mi dava un errore (e quindi il consiglio try/catch)sul metodo inputStreamToString.

private String inputStreamToString(InputStream helpfile) throws IOException {<br /> // TODO Auto-generated method stub<br /> <br /> /*<br /> * To convert the InputStream to String we use the<br /> * Reader.read(char[] buffer) method. We iterate until the<br /> * Reader return -1 which means there's no more data to<br /> * read. We use the StringWriter class to produce the string.<br /> */<br /> if (helpfile != null) {<br /> Writer writer = new StringWriter();<br /> <br /> <br /> char[] buffer = new char[1024];<br /> try {<br /> Reader reader = new BufferedReader(<br /> new InputStreamReader(helpfile, "UTF-8"));<br /> int n;<br /> while ((n = reader.read(buffer)) != -1) {<br /> writer.write(buffer, 0, n);<br /> }<br /> } finally {<br /> helpfile.close();<br /> }<br /> return writer.toString();<br /> } else { <br /> return "";<br /> }<br /> }


Spero di non aver scritto un mucchio di stronzate!

[spampy78]

Si effettivamente nel codice che avevo postato manca il blocco catch. Implementa sia il catch che il finally. Era questo il dubbio?

[Anular]

ancora niente. Pagina totalmente vuota.

public class HelpActivity extends Activity {<br /> /** Called when the activity is first created. */<br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.help);<br /> InputStream helpfile = getResources().openRawResource(R.raw.quizhelp);<br /> TextView helpText = (TextView) findViewById(R.id.helptext);<br /> InputStream helpstring;<br /> try {<br /> helpstring = inputStreamToString(helpfile);<br /> System.out.println("ciao_string");<br /> (non stampa)<br /> <br /> } catch (IOException e) {<br /> // TODO Auto-generated catch block<br /> e.printStackTrace();<br /> }<br /> <br /> <br /> }<br /> <br /> private InputStream inputStreamToString(InputStream helpfile) throws IOException {<br /> // TODO Auto-generated method stub<br /> <br /> /*<br /> * To convert the InputStream to String we use the<br /> * Reader.read(char[] buffer) method. We iterate until the<br /> * Reader return -1 which means there's no more data to<br /> * read. We use the StringWriter class to produce the string.<br /> */<br /> if (helpfile != null) {<br /> Writer writer = new StringWriter();<br /> <br /> <br /> char[] buffer = new char[1024];<br /> try {<br /> Reader reader = new BufferedReader(<br /> new InputStreamReader(helpfile, "UTF-8"));<br /> int n;<br /> while ((n = reader.read(buffer)) != -1) {<br /> writer.write(buffer, 0, n);<br /> System.out.println("ciao");<br /> (Non stampa!)<br /> }<br /> } finally {<br /> helpfile.close();<br /> }<br /> return helpfile;<br /> } else { <br /> return null;<br /> }<br /> }<br /> }

[spampy78]

Appena torno a casa stasera faccio qualche prova e ti faccio sapere

[spampy78]

ancora niente. Pagina totalmente vuota.

public class HelpActivity extends Activity {<br /> /** Called when the activity is first created. */<br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.help);<br /> InputStream helpfile = getResources().openRawResource(R.raw.quizhelp);<br /> TextView helpText = (TextView) findViewById(R.id.helptext);<br /> InputStream helpstring;<br /> try {<br /> helpstring = inputStreamToString(helpfile);<br /> System.out.println("ciao_string");<br /> (non stampa)<br /> <br /> } catch (IOException e) {<br /> // TODO Auto-generated catch block<br /> e.printStackTrace();<br /> }<br /> <br /> <br /> }<br /> <br /> private InputStream inputStreamToString(InputStream helpfile) throws IOException {<br /> // TODO Auto-generated method stub<br /> <br /> /*<br /> * To convert the InputStream to String we use the<br /> * Reader.read(char[] buffer) method. We iterate until the<br /> * Reader return -1 which means there's no more data to<br /> * read. We use the StringWriter class to produce the string.<br /> */<br /> if (helpfile != null) {<br /> Writer writer = new StringWriter();<br /> <br /> <br /> char[] buffer = new char[1024];<br /> try {<br /> Reader reader = new BufferedReader(<br /> new InputStreamReader(helpfile, "UTF-8"));<br /> int n;<br /> while ((n = reader.read(buffer)) != -1) {<br /> writer.write(buffer, 0, n);<br /> System.out.println("ciao");<br /> (Non stampa!)<br /> }<br /> } finally {<br /> helpfile.close();<br /> }<br /> return helpfile;<br /> } else { <br /> return null;<br /> }<br /> }<br /> }

ciao scusami ma non ho potuto ancora avuto tempo di provare il codice, però ad occhio e croce ad uno sguardo veloce....

penso dovresti cambiare

helpstring = inputStreamToString(helpfile);

in

helpText.setText(inputStreamToString(helpfile));

e

return helpfile;

in

return (writer.toString());

[Anular]

nada. sta diventando un'impresa

[spampy78]

allora... ho testato velocemente il seguente codice e funziona tutto, confrontalo con il tuo

package myTest.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class main extends Activity 
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        InputStream helpfile = getResources().openRawResource(R.raw.indirizzi);
        TextView helpText = (TextView) findViewById(R.id.TextView01);
        
        try
        {
        	helpText.setText(inputStreamToString(helpfile));
        }
        catch (IOException e)
        {
        	e.printStackTrace();
        }
    }

    private String inputStreamToString(InputStream helpfile) throws IOException 
    {  
		if (helpfile != null) 
		{  
		    Writer writer = new StringWriter();  
		  
		    char[] buffer = new char[1024];  
		    
		    try 
		    {  
		        Reader reader = new BufferedReader(new InputStreamReader(helpfile, "UTF-8"));  
		        int n;
		        while ((n = reader.read(buffer)) != -1) 
		        {  
		            writer.write(buffer, 0, n);  
		            System.out.println("ciao");  
		        }  
		    }
		    catch (IOException e)
		    {
		    	e.printStackTrace();
		    }
		    finally 
		    {  
		        helpfile.close();  
		    }  
		    
		    return writer.toString();  
		} 
		else 
		{          
		    return null;  
		}
    }
}