AsyncTask post方式 单例 网络判断

public class HttpUtil {

private static HttpUtil util;

private HttpUtil(){};

public static HttpUtil getInstance(){
    if (util == null){
        synchronized (HttpUtil.class){
            if (util == null){
                util = new HttpUtil();
            }
        }
    }
    return util;
}


public static boolean isNetWorkConnected(Context context){
    if (context != null){
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
				//需要添加网络判断权限
        NetworkInfo info = manager.getActiveNetworkInfo();

        if (info != null){
            return info.isAvailable();
        }
    }
    return false;
}

public interface CallBack{
    void getBack(String s);
}

public static void postAsyncTask(String url, String phone, String pswd, final CallBack back){
    new AsyncTask<String, Void, String>(){

        @Override
        protected String doInBackground(String... strings) {
            return postData(strings[0],strings[1],strings[2]);
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            if (!TextUtils.isEmpty(s)){
                back.getBack(s);
            }
        }
    }.execute(url,phone,pswd);

}

public static String postData(String url,String phone,String pswd){

    try {
        HttpURLConnection connection = null;

        URL url1 = new URL(url);
        connection = (HttpURLConnection) url1.openConnection();
        connection.setReadTimeout(5000);
        connection.setConnectTimeout(5000);
        connection.setRequestMethod("POST");

        String body = "phone=" + URLEncoder.encode(phone) + "&pwd=" + URLEncoder.encode(pswd);
        connection.getOutputStream().write(body.getBytes());

        if (connection.getResponseCode() ==  HttpURLConnection.HTTP_OK){
            InputStream inputStream = connection.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
            BufferedReader reader = new BufferedReader(inputStreamReader);

            StringBuilder builder = new StringBuilder();
            String str = "";
            while ((str = reader.readLine()) != null){
                builder.append(str);
            }

            connection.disconnect();
            Log.i("aaa", builder.toString());
            return builder.toString();
        }

    } catch (Exception e) {
        e.printStackTrace();
    }

    return null;
}

}

标签：return,String,AsyncTask,connection,单例,post,null,HttpUtil,public
来源： https://blog.csdn.net/black_amber/article/details/89378181