ImageLoaderUtil.java

package com.anthony.imageloader;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
import android.text.TextUtils;

/**
 * Created by Anthony on 2016/3/3.
 * Class Note:
 * use this class to load image,single instance
 */
public class ImageLoaderUtil {

    public static final int PIC_LARGE = 0;
    public static final int PIC_MEDIUM = 1;
    public static final int PIC_SMALL = 2;

    public static final int LOAD_STRATEGY_NORMAL = 0;
    public static final int LOAD_STRATEGY_ONLY_WIFI = 1;

    // set wifi through SettingUtil.getOnlyWifiLoadImg(ctx);
    public static boolean wifiFlag = false;

    private BaseImageLoaderStrategy mStrategy;


    public ImageLoaderUtil() {
        mStrategy = new GlideImageLoaderStrategy();
    }

//    private static ImageLoaderUtil mInstance;

//single instance
//    public static ImageLoaderUtil getInstance(){
//        if(mInstance ==null){
//            synchronized (ImageLoaderUtil.class){
//                if(mInstance == null){
//                    mInstance = new ImageLoaderUtil();
//                    return mInstance;
//                }
//            }
//        }
//        return mInstance;
//    }


    public void loadImage(Context context, ImageLoader img) {
        mStrategy.loadImage(context, img);
    }

    public void setLoadImgStrategy(BaseImageLoaderStrategy strategy) {
        mStrategy = strategy;
    }

    /**
     * 没有网络
     */
    public static final int NETWORKTYPE_INVALID = 0;
    /**
     * wap网络
     */
    public static final int NETWORKTYPE_WAP = 1;
    /**
     * 2G网络
     */
    public static final int NETWORKTYPE_2G = 2;
    /**
     * 3G和3G以上网络，或统称为快速网络
     */
    public static final int NETWORKTYPE_3G = 3;
    /**
     * wifi网络
     */
    public static final int NETWORKTYPE_WIFI = 4;

    /**
     * get the network type (wifi,wap,2g,3g)
     *
     * @param context
     * @return
     */
    public static int getNetWorkType(Context context) {

        int mNetWorkType = NETWORKTYPE_INVALID;
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();
        if (networkInfo != null && networkInfo.isConnected()) {
            String type = networkInfo.getTypeName();
            if (type.equalsIgnoreCase("WIFI")) {
                mNetWorkType = NETWORKTYPE_WIFI;
            } else if (type.equalsIgnoreCase("MOBILE")) {
                String proxyHost = android.net.Proxy.getDefaultHost();
                mNetWorkType = TextUtils.isEmpty(proxyHost)
                        ? (isFastMobileNetwork(context) ? NETWORKTYPE_3G : NETWORKTYPE_2G)
                        : NETWORKTYPE_WAP;
            }
        } else {
            mNetWorkType = NETWORKTYPE_INVALID;
        }
        return mNetWorkType;
    }


    private static boolean isFastMobileNetwork(Context context) {
        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        switch (telephonyManager.getNetworkType()) {
            case TelephonyManager.NETWORK_TYPE_1xRTT:
                return false; // ~ 50-100 kbps
            case TelephonyManager.NETWORK_TYPE_CDMA:
                return false; // ~ 14-64 kbps
            case TelephonyManager.NETWORK_TYPE_EDGE:
                return false; // ~ 50-100 kbps
            case TelephonyManager.NETWORK_TYPE_EVDO_0:
                return true; // ~ 400-1000 kbps
            case TelephonyManager.NETWORK_TYPE_EVDO_A:
                return true; // ~ 600-1400 kbps
            case TelephonyManager.NETWORK_TYPE_GPRS:
                return false; // ~ 100 kbps
            case TelephonyManager.NETWORK_TYPE_HSDPA:
                return true; // ~ 2-14 Mbps
            case TelephonyManager.NETWORK_TYPE_HSPA:
                return true; // ~ 700-1700 kbps
            case TelephonyManager.NETWORK_TYPE_HSUPA:
                return true; // ~ 1-23 Mbps
            case TelephonyManager.NETWORK_TYPE_UMTS:
                return true; // ~ 400-7000 kbps
            case TelephonyManager.NETWORK_TYPE_EHRPD:
                return true; // ~ 1-2 Mbps
            case TelephonyManager.NETWORK_TYPE_EVDO_B:
                return true; // ~ 5 Mbps
            case TelephonyManager.NETWORK_TYPE_HSPAP:
                return true; // ~ 10-20 Mbps
            case TelephonyManager.NETWORK_TYPE_IDEN:
                return false; // ~25 kbps
            case TelephonyManager.NETWORK_TYPE_LTE:
                return true; // ~ 10+ Mbps
            case TelephonyManager.NETWORK_TYPE_UNKNOWN:
                return false;
            default:
                return false;
        }
    }
}