Display data from database into textview

Question

I\'m trying display random data from database into two textviews (TextView1 display NAME, TextView2 display PHONENUMBER) when I click on next button, but I don\'t know how c

Answer 1

Try this :

    Button buttonnext = (Button) findViewById(R.id.next);
    buttonnext.setOnClickListener(onclickListener);

private OnClickListener onclickListener = new OnClickListener() {
    @Override
    public void onClick(final View v) {


int randInt = new Random().nextInt(contacts.size()) + 1;
       Contact cn=contacts.get(randInt);
          name.setText("Id: "+cn.getID()+" ,Name: " + cn.getName() + "
                    ,Phone: " + cn.getPhoneNumber());
    }
};

Answer 2

you will need to set setOnClickListener for button to do some action on Button click and use and Counter variable to show next value on button click as:

List<Contact> contacts = db.getAllContacts();   

    TextView name = (TextView) findViewById(R.id.textView1);

    Button buttonnext = (Button) findViewById(R.id.next);
    buttonnext.setOnClickListener(onclickListener);
    int listcounter=0;

private OnClickListener onclickListener = new OnClickListener() {
    @Override
    public void onClick(final View v) {
       if(listcounter<contacts.size()){
          Contact cn=contacts.get(listcounter);

          name.setText("");
          name.append("Id: "+cn.getID());
          name.append(" ,Name: "+cn.getName());
          name.append(",Phone: "+cn.getPhoneNumber());

          listcounter++;
        }
       else{
             //Reset the Counter here
            listcounter = 0;

       }
    }
};

Answer 3

You need an OnClickListener in your button. You can declare it in XML using the android:onClick attribute.

This is explained in a detailed manner in http://developer.android.com/guide/topics/ui/controls/button.html#HandlingEvents.