Android开发中常用的工具类

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提示工具类（Snackebar&Toast）

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public class SnackbarUtil {
    private static Snackbar snackbar;
    public static void show(View view, String message) {
        if (snackbar == null) {
            snackbar = Snackbar.make(view, message, Snackbar.LENGTH_SHORT);
        } else {
            snackbar.setText(message);
        }
        snackbar.show();
    }
}

Log打印工具类

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public class LogUtil {
    private static boolean ENABLE = true;
    public static void v(String tag, String msg) {
        if (ENABLE) {
            Log.v(tag, msg);
        }
    }
    public static void d(String tag, String msg) {
        if (ENABLE) {
            Log.d(tag, msg);
        }
    }
    public static void i(String tag, String msg) {
        if (ENABLE) {
            Log.i(tag, msg);
        }
    }
    public static void w(String tag, String msg) {
        if (ENABLE) {
            Log.w(tag, msg);
        }
    }
    public static void e(String tag, String msg) {
        if (ENABLE) {
            Log.e(tag, msg);
        }
    }
}

判断网络连接的工具类

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public class ConnUtil {
    public static boolean isNetConnected(Context context) {
        if (context != null) {
            ConnectivityManager manager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo info = manager.getActiveNetworkInfo();
            if (info != null) {
                return info.isAvailable();
            }
        }
        return false;
    }
}

Wifi下获取手机的IP地址和MAC地址

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public String getLocalIpAddress() {
    try{
        for(Enumeration<NetworkInterface> en = NetworkInterface
                .getNetworkInterfaces(); en.hasMoreElements();) {
            NetworkInterface intf = en.nextElement();
            for(Enumeration<InetAddress> enumIpAddr = intf
                    .getInetAddresses(); enumIpAddr.hasMoreElements();) {
                InetAddress inetAddress = enumIpAddr.nextElement();
                if(!inetAddress.isLoopbackAddress()) {
                    return inetAddress.getHostAddress().toString();
                }
            }
        }
    } catch(SocketException ex) {
        Log.e("WifiPreference IpAddress", ex.toString());
    }
    return null;
}
public String getLocalMacAddress(Context context) {
    WifiManager wifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    WifiInfo info = wifi.getConnectionInfo();
    return info.getMacAddress();
}