Android之TextView密码输入变星号时间

private static class Visible extends Handler implements UpdateLayout, Runnable{

　
public Visible(Spannable sp, PasswordTransformationMethod ptm) {
mText = sp;
mTransformer = ptm;
postAtTime(this, SystemClock.uptimeMillis() + 1500);
}

public void run() {
mText.removeSpan(this);
}

private Spannable mText;
private PasswordTransformationMethod mTransformer;
}