package com.example.typewriter;

import java.util.Timer;

import java.util.TimerTask;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.widget.TextView;

public class MainActivity extends Activity {

TextView tv;

String str = "some words !!!";

int i = 0;

Timer timer = new Timer();

Handler handler = new Handler() {

public void handleMessage(Message msg) {

tv.append(msg.obj.toString());

};

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

tv = (TextView) findViewById(R.id.tv);

timer.schedule(new TimerTask() {

@Override

public void run() {

Message msg = new Message();

char[] c = str.toCharArray();

msg.obj = c[i];

handler.sendMessage(msg);

if (i < c.length - 1) {

++i;

} else {

this.cancel();

}

}

}, 0, 1000);

}

}