为什么用Toast.maketext()语句没有效果，而用log.i语句有效果？？？

代码如下：

@Override

public void onCheckedChanged(RadioGroup arg0, int arg1) {

switch (arg1) {

case R.id.radio0:

Toast.makeText(MainActivity.this, "篮球", 1);

Log.i("tag", R.id.radio0+"");

break;

case R.id.radio1:

Toast.makeText(MainActivity.this, "足球", 1);

Log.i("tag", R.id.radio1+"");

break;

case R.id.radio2:

Toast.makeText(MainActivity.this, "乒乓球", 1);

Log.i("tag", R.id.radio2+"");

break;

default:

break;

}

}