android 常用代码

// 新建一个toast对象
private Toast toast;

    public void showMsg(String arg) {
        if (toast == null) {
            toast = Toast.makeText(this, arg, Toast.LENGTH_SHORT);
        } else {
            toast.cancel();
            toast.setText(arg);
        }
        toast.show();
    }

res/drawable目录下面建立一个设置圆角边框参数的xml文件，如下：

corner_round.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <solid android:color="#FFCC33" />

    <corners android:radius="10dp" />

</shape>

调用：android:background="@drawable/corner_round"

/**
* 获取当前日期
*/

protected String getNowTime() {
String nowTime = new SimpleDateFormat("yyyy年MM月dd日").format(new Date());
return nowTime;
}