android 常用代碼

// 建立一個toast對象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目錄下面建立一個設定圓角邊框參數的xml檔案，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>

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

/**
* 擷取當前日期
*/

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