Display ArrayList to TextView

Question

I am trying to do something simple: display my ArrayList to a TextView. I have tried to use methods that would do this without success. Or am I supposed to use a ListView instead of a TextView?

Anyway here is the code. I hope someone can help.

public class MainActivity extends Activity {

    Button aButton; // Global Scope
    TextView text2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.new_layout); 

        aButton = (Button) this.findViewById(R.id.button1);
        aButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                ArrayList<String> list = new ArrayList<String>();

                list.add("Books");
                list.add("Newspapers");
                list.add("Magazines");

                for (int i = 0; i < list.size(); i++) {
                    //System.out.println(list.get(i));

                    Log.i("Results", list.get(i));
                    text2.setText(text2.getText());
                }
            }
        });
    }

Answer 1

You are not changing text of TexView:

text2.setText(text2.getText());

You rather thought about:

text2.setText(list.get(i));

eventually:

text2.setText((text2.getText() != null ? text2.getText() : "") + list.get(i));

Answer 2

try this :

aButton.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        ArrayList<String> list = new ArrayList<String>();

        list.add("Books");
        list.add("Newspapers");
        list.add("Magazines");
        String listString = "";

        for (String s : list) {
            listString += s + " ";
        }
        text2.setText(listString);
    }
});

Answer 3

Your prolem is here

text2.setText(text2.getText())

The working code will be:

public class MainActivity extends Activity {

Button aButton; // Global Scope
TextView text2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.new_layout); 

    aButton = (Button) this.findViewById(R.id.button1);
    aButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            ArrayList<String> list = new ArrayList<String>();

            list.add("Books");
            list.add("Newspapers");
            list.add("Magazines");

            for (int i = 0; i < list.size(); i++) {
                //System.out.println(list.get(i));

                Log.i("Results", list.get(i));
                text2.setText(list.get(i));
            }
        }
    });
}