Utils类(获取手机网络状态,读取Json,)

权限

<uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

依赖

compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'compile 'com.google.code.gson:gson:2.2.4'compile 'com.jakewharton:butterknife:8.8.1'annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'implementation project(':xlistviewlibrary')

工具类

import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.util.Log;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;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;import java.net.URLConnection;/** * Created by liqiang on 2017/11/2. */public class Utils {    /**     * 获取手机网络状态     * -1 :无网络     * 0 :  蜂窝网络;     * 1  : wifi网络     *     * @param context 上下文对象     * @return     */    public static int getNetType(Context context) {        int mState = -1;// 代表无网络        //获取android系统提供的服务, 转换成链接管理类,这个类专门处理链接相关的东西        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        //NetworkInfo封装了网络链接的信息        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();        if (activeNetworkInfo == null) {            return mState;        }        int type = activeNetworkInfo.getType();        if (type == ConnectivityManager.TYPE_WIFI) {//代表现在是wifi网络            mState = 1;        } else if (type == ConnectivityManager.TYPE_MOBILE) {            mState = 0;        }        return mState;    }    private static String tag = "TAG";    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     *     * @param urlString     * @return     */    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;    }    public static String getNetClient(String urlString) {        //得到httpclient对象        DefaultHttpClient defaultHttpClient = new DefaultHttpClient();        //封装get请求        HttpGet httpGet = new HttpGet(urlString);        try {            //获取返回的response            HttpResponse response = defaultHttpClient.execute(httpGet);            //获取状态码            int statusCode = response.getStatusLine().getStatusCode();            if (statusCode == 200) {                HttpEntity entity = response.getEntity();                String json = EntityUtils.toString(entity);                Log.e("httpclient", "run:----- "+json );                return json;            }else {            }        } catch (IOException e) {            e.printStackTrace();        }        return "";    }}