Question

Can someone explain me why this code doesn’t work? I want to change the text of the textview with Java code but nothing changes.

package com.example.gethtml;

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

public class MainActivity extends Activity {

    GetCode getCode = new GetCode();
    Affiche affiche = new Affiche();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        try {
            getCode.getCode();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

Answer 1

Code to change the textview‘s text through java code should contain at least one TextView object to start with. I can not see that in your code. But I am writing below a sample code for that.

setContentView(R.layout.activity_main);
TextView txtView = (TextView) findViewById(R.id.txtview);
txtView.setText("This is changed text");

Your activity_main.xml should contain TextView defined with id you are referring. Hope it helps.