how to change the text of the texview in android

Hi i am making simple quote application which display quotes. I have the quotes in sqlite database. I have two button "next" and "previous" when user hit next the next quote should display and and when hit previous the previous quotes should display.Database is working fine but i am stuck at how to change the text of textV开发者_C百科iew.I tried some things but they are not working properly. Any suggestion or help? quotes like jokes,proverbs etc.

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firstly fetch all the quotes and store into the Arraylist or any equivalent object now use one counter object which will track the current position and initialize it with 0 if you get the quote more than equals to 1

now on the next button check first counter value is equals to the arraylist size then do nothing otherwise increase by 1 and get the next quote from the arraylist

if(counter==-1)
    return;

if(counter==array.size()-1)
   return

counter++;
yourtextview.setText(array.get(counter));

do the same things into the previous, in this counter-- instead of counter++

Edit without arraylist object and counter object

check the cursor using moveNext() and movePrevious() like for next check

   if(cursor.moveNext())
       yourtextview.setText(coursor.getString(yourcolumnindex));

and in previous

   if(cursor.movePrevious())
       yourtextview.setText(coursor.getString(yourcolumnindex));

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Take a look at http://developer.android.com/reference/android/widget/TextView.html

Use onClickListeners on your buttons. When the user presses the button you fetch the appropriate text from the database and display it for example by using setText(CharSequence text)

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To change the text of textview:

textview.setText("your text");

if you are getting any exception in changing the text then try to do it with the help of handler.

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I m tring this it is working but when i click next the previous text does not disappear.what to do?

           public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    tv=(TextView)findViewById(R.id.text);
    next=(Button)findViewById(R.id.next);
    back=(Button)findViewById(R.id.back);
 next.setOnClickListener(this);
 back.setOnClickListener(this);

    try {
        db=new DbH(this);
    } catch (IOException e2) {

        e2.printStackTrace();
    }


        try {
            db.createdatabase();
        } catch (IOException e) {

            e.printStackTrace();
        }

    db.opendatabase();
     cur=db.data();
     cur.moveToFirst();


 //int i=0;

    tv.append(cur.getString(1));

 cur.moveToNext();

// cur.close();

} @Override public void onClick(View v) {

switch(R.id.next)
{
case R.id.next :
    cur.moveToNext();
    tv.append(""+cur.getString(1));
break;
case R.id.back:
{
    cur.moveToPrevious();
    tv.append(""+cur.getString(1));
    break;
}

}