android 快速開發不可或缺的12個工具類

其中10個來自于鴻洋大神，1個是我平常總結，複制到你的項目中，能省下不少時間，加上包名就可以直接去用。并不可多得的幹貨

代碼片段

//跟網絡相關的工具類
public class NetUtils
{
    private NetUtils()
    {
        /* cannot be instantiated */
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 判斷網絡是否連接配接
     * 
     * @param context
     * @return
     */
    public static boolean isConnected(Context context)
    {

        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        if (null != connectivity)
        {

            NetworkInfo info = connectivity.getActiveNetworkInfo();
            if (null != info && info.isConnected())
            {
                if (info.getState() == NetworkInfo.State.CONNECTED)
                {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 判斷是否是wifi連接配接
     */
    public static boolean isWifi(Context context)
    {
        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        if (cm == null)
            return false;
        return cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;

    }

    /**
     * 打開網絡設定界面
     */
    public static void openSetting(Activity activity)
    {
        Intent intent = new Intent("/");
        ComponentName cm = new ComponentName("com.android.settings",
                "com.android.settings.WirelessSettings");
        intent.setComponent(cm);
        intent.setAction("android.intent.action.VIEW");
        activity.startActivityForResult(intent, );
    }

}
           

你還在苦苦的findViewById嗎？

public <T> T $(int viewID) {
    return (T) findViewById(viewID);
}

//有了它，再也不用findviewbyid了
        goodBriefTextView = $(R.id.product_id);
        goodPromotePriceTextView = $(R.id.product_price);
        goodMarketPriceTextView = $(R.id.market_price);
        gooddeposit = $(R.id.deposit);
        countDownTextView = $(R.id.count_down);
           

閑話不多說，附上下載下傳連結：http://pan.baidu.com/s/1bk8YUq