Android 开发中网络状态获取教程

android 开发中网络状态获取教程，首先增加网络权限。

<uses-permission android:name="android.permission.internet"/>
<uses-permission android:name="android.permission.access_network_state"/>
<uses-permission android:name="android.permission.change_network_state"/>

/**
     * 判断网络是否可用
     * @param context
     * @return
     */
    public static boolean isnetworkavailable(context context) {

        connectivitymanager manager = (connectivitymanager) context.getsystemservice(context.connectivity_service);
        if (manager != null) {
            networkinfo info = manager.getactivenetworkinfo();
            if (info != null && info.isconnected()) { // 当前网络是连接的
                if (info.getstate() == networkinfo.state.connected) { //当前网络是可用的
                    return true;
                }
            }
        }
        return false;
    }


    /**
     * 判断移动网络是否可用
     *
     * @param context
     * @return true 可用 false 不可用
     */
    public static boolean ismobileconnect(context context) {

        connectivitymanager manager = (connectivitymanager) context.getsystemservice(context.connectivity_service);
        if (manager == null)
            return false;

        networkinfo networkinfo = manager.getnetworkinfo(connectivitymanager.type_mobile);
        if (networkinfo != null) {
            return networkinfo.isavailable();
        }
        return false;
    }

    /**
     * 判断是否是wifi网络连接
     * @param context
     * @return true
     */
    public static boolean iswificonnect(context context) {

        connectivitymanager manager = (connectivitymanager) context.getsystemservice(context.connectivity_service);
        if (manager == null)
            return false;
        networkinfo networkinfo = manager.getnetworkinfo(connectivitymanager.type_wifi);
        if (networkinfo != null) {
            return networkinfo.isavailable();
        }
        return false;
    }