NetUtil 网络工具类

 import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.util.Log;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

public class NetUtil {

    private static String tag = "getNetJson";

    public static String getNetJson(String urlString) {

        try {

            //url对象封装接口字符串

            URL url = new URL(urlString);

            //用url打开连接, 返回值我们用HttpURLConnection

            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

            urlConnection.setConnectTimeout(8000);//设置链接超时时间

            int responseCode = urlConnection.getResponseCode(); //获取状态码

            if (responseCode == 200) {

                InputStream inputStream = urlConnection.getInputStream();

                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

                //可拼接的字符串

                StringBuilder stringBuilder = new StringBuilder();

                String temp = "";

                while ((temp = bufferedReader.readLine()) != null) {

                    stringBuilder.append(temp);

                }

                String jsonString = stringBuilder.toString();

                return jsonString;

            } else {

            }

        } catch (MalformedURLException e) {

            e.printStackTrace();

            Log.e(tag, "getNetJson: " + e.toString());

        } catch (IOException e) {

            e.printStackTrace();

            Log.e(tag, "getNetJson: " + e.toString());

        }

        return "";

    }

    //获取网络图片

    public static Bitmap getNetBitmap(String urlString) {

        try {

            URL url = new URL(urlString);

            HttpURLConnection httpurlConnection = (HttpURLConnection) url.openConnection();

            httpurlConnection.setConnectTimeout(8000);//设置链接超时时间

            int responseCode = httpurlConnection.getResponseCode();

            if (responseCode == 200) {

                InputStream inputStream = httpurlConnection.getInputStream();

                //BitmapFactory:  android提供好的加工图片的工具类,

                Bitmap bitmap = BitmapFactory.decodeStream(inputStream);

                return bitmap;

            } else {

                //do nothing

            }

        } catch (MalformedURLException e) {

            e.printStackTrace();

            Log.e(tag, "getNetBitmap: " + e.toString());

        } catch (IOException e) {

            e.printStackTrace();

            Log.e(tag, "getNetBitmap: " + e.toString());

        }

        return null;

    }

}