工具類BitMap 把網絡URL圖片轉換成BitMap

代碼不復雜，直接把完整代碼貼上。

這次是用到很舊的HttpURLConnection，那為什麽會用這個，因為我本來想轉回okhttp的，可實在沒時間轉，項目就已經做下去了，結果轉不回來。

package com.paradise.electronic.eparadise2.util;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * Created by Administrator on 17-11-12.
 */
public class BitMap {

    // 餓漢式
    private static BitMap instance = new BitMap();

    private BitMap(){}

    public static BitMap getInstance(){
        return instance;
    }

    /*
    *    get image from network
    *    @param [String]imageURL
    *    @return [BitMap]image
    */
    public Bitmap returnBitMap(String url){
        URL myFileUrl = null;
        Bitmap bitmap = null;
        try {
            myFileUrl = new URL(url);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        try {
            HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
            conn.setDoInput(true);
            conn.connect();
            InputStream is = conn.getInputStream();
            bitmap = BitmapFactory.decodeStream(is);
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return bitmap;
    }


}