解决一个Toast在页面退出依然不消失的问题

    private boolean isShowToast = false;
    private static Toast toast;



    toast = Toast.makeText(this, "账号密码错误", Toast.LENGTH_SHORT);
    toast.show();
    isShowToast = true;




    @Override
    protected void onPause() {
        super.onPause();
        if(isShowToast==true)
            toast.cancel();

    }