private void randomCode() {
String strRand = "";
for (int i = 0; i < 4; i++) {
strRand += String.valueOf((int) (Math.random() * 10));
}
textrandomcode.setText(strRand);
Log.i("aaa", "randomCode: " + strRand);
}
Android 获取一个随机的四位数字验证码
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转载自blog.csdn.net/h1047445540/article/details/86511654
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