Android的Handler使用
如何每隔一段时间进行一些操作呢，Handler就可以做到。 下面的Demo的功能为每隔3秒显示MyItems数组中的不同数据。
public class MainActivity extends Activity {
private int count = 0;
private static final String[] MyItems = {
"Here is a Item1", "Here is a Item2", "Here is a Item3", "Here is a Item4" };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Timer timer = new Timer();
timer.scheduleAtFixedRate(new Newtask(), 10, 3000);
}
private Handler hand = new Handler(){
public void handleMessage(Message msg){
switch(msg.what)
{
case 1:
Toast.makeText(MainActivity.this, MyItems[count], Toast.LENGTH_SHORT).show();
if(count == 3)
count = 0;
else
count++;
break;
}
};
};
private class Newtask extends TimerTask
{
@Override
public void run() {
// TODO Auto-generated method stub
Message msg = new Message();
msg.what = 1;
hand.sendMessage(msg);
}
}
} |
下面的文章讲解的比较详细：
本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/archive/2013/03/14/2958909.html，如需转载请自行联系原作者