Question

Continuously changing imageview image on start of activity. Will it be possible without using Thread?if not at least tell me how to use Thread properly and how should I initiate it. Please.,

It’s for a whack a mole like android game.

---

I tried to do simple display of random text but did not work.

public class NewGame extends Activity {

    gameThread gameOn;

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

        hView = (TextView) findViewById(R.id.HammersText);
        gameOn = new gameThread();
        gameOn.start();
    }
}

---

public class gameThread extends Thread
{
    NewGame gameOn;

    public void run() {
        super.run();

        Random ramhole = new Random();
        int hole = ramhole.nextInt(8);

        Random ramletter = new Random();
        int letter = ramletter.nextInt(26);

        gameOn = new NewGame();

        gameOn.hView.setText("Hole = "+hole+"Letter = "+letter);
    }

}

Please help me out on this.

Answer 1

Use a countdownTimer instead of Thread

new CountDownTimer(9000000, 5000) {

 public void onTick(long millisUntilFinished) {
       Random ramhole = new Random();
        int hole = ramhole.nextInt(8);

        Random ramletter = new Random();
        int letter = ramletter.nextInt(26);
        hView.setText("Hole = "+hole+"Letter = "+letter);
 }

 public void onFinish() {
   //Restart timer if you want.
 }
}.start();

You can still do with Threading but its a overkill for what you are trying to do.
Also in your case, you cannot do

gameOn = new NewGame();  

Activity always needs to be initialized by framework. And setText api should always be called from Ui thread. Maybe that is why your app is not working