Android-async-http框架的二次封装

Android-async-http的简介及特点

 

    Async-http是一款国外开源框架。高效的网络数据请求，文件下载和上传。

    特点：

        1.清晰的网络请求回调

        2.请求使用ThreadPool，限制并发资源使用情况

        3.GEt/POST基于参数构建的使用（RequestParams）,方便

        4.Multipart文件上传，大数据上传下载

        5.自动智能请求重试，优化了质量不一的移动连接

        6.内置相应解析成JSON，使用JsonHttpResponseHandler

        7.持久化cookie存储，保存cookie到你的应用程序的SharedPreferences

        8.二进制文件（图片等）的下载，使用BinaryHttpResponseHandler

 

 

    创建一个MyAsyncHttpDemo项目，并将android-async-http-1.4.3.jar包导入libs文件夹中

    接下来在xml文件中给TextView添加一个id：android:id="@+id/tv"

    在MainActivity.java源文件中，分别常创建两个方法，并在onCreate方法中调用即可：

 

        private void asyncPost(){

            AsyncHttpClient client = new AsyncHttpClient();

            String url = "http://www.tuling123.com/openapi/api?";

            RequestParams params = new RequestParams();

            params.put("key", "4031b38733e55228d0eb123eba1471f9");

            params.put("info", "北京今天天气");

 

            client.post(url, params, new AsyncHttpResponseHandler(){

 

                @Override

                public void onSuccess(String arg0) {

                    Log.e("onSuccess", "成功返回数据:"+arg0);

                    tv.setText(arg0);

                    Toast.makeText(MainActivity.this, arg0, 1).show();

                    super.onSuccess(arg0);

                }   

 

                @Override

                public void onFailure(Throwable arg0) {

                    Log.d("onFailure", "请求数据失败");

                    Toast.makeText(MainActivity.this, "网络请求失败", 1).show();

                    super.onFailure(arg0);

                }               

            });           

        }

 

        private void asyncGet() {

            AsyncHttpClient client = new AsyncHttpClient();

            String url = "http://www.tuling123.com/openapi/api?key=4031b38733e55228d0eb123eba1471f9&info=北京今天天气";

           

            client.get(url, new AsyncHttpResponseHandler() {

 

                @Override

                public void onFailure(Throwable arg0) {

                    super.onFailure(arg0);

                    Log.d("onFailure", "请求数据失败");

                    Toast.makeText(MainActivity.this, "网络请求失败", 1).show();

                }

 

                @Override

                public void onSuccess(String arg0) {

                    super.onSuccess(arg0);

                    Log.e("onSuccess", "成功返回数据:"+arg0);

                    tv.setText(arg0);

                    Toast.makeText(MainActivity.this, arg0, 1).show();

                }

            });

        }

 

 

 

    为了是更方便的应用，我们可以对其进行二次封装，新建一个继承自AsyncHttpResponseHandler的类：

      

        public abstract class NetCallBack extends AsyncHttpResponseHandler {

 

            @Override

            public void onFailure(Throwable arg0) {

                Log.d("info", "请求失败，隐藏进度条"+ arg0);

                onMyFailure(arg0);

                super.onFailure(arg0);

            }

 

            @Override

            public void onStart() {

                Log.d("info", "请求数据开始，弹出进度条框");

                super.onStart();

            }

 

            @Override

            public void onSuccess(String arg0) {

                Log.d("info", "请求成功，隐藏进度条"+ arg0);

                onMySuccess(arg0);

                super.onSuccess(arg0);

            }

           

            public abstract void onMySuccess(String result);

            public abstract void onMyFailure(Throwable arg0);

           

        }

 

    再新建一个工具类：

        public class RequestUtils {

 

            public static AsyncHttpClient client = new AsyncHttpClient();

 

            public static void clientGet(String url, NetCallBack cb) {

                client.get(url, cb);

            }

 

            public static void clientPost(String url, RequestParams params,

                    NetCallBack cb) {

                client.post(url, params, cb);

            }

 

        }

 

    再在MainActivity.java源文件中：

 

            private void asyncHttpPost() {

                String url = "http://www.tuling123.com/openapi/api?";

                RequestParams params = new RequestParams();

                params.put("key", "4031b38733e55228d0eb123eba1471f9");

                params.put("info", "北京今天天气");

                RequestUtils.clientPost(url, params, new NetCallBack() {

                   

                    @Override

                    public void onMySuccess(String result) {

                        Log.e("onMySuccess", "成功返回数据:"+ result);

                        tv.setText(result);

                        Toast.makeText(MainActivity.this, result, 1).show();                       

                    }

                   

                    @Override

                    public void onMyFailure(Throwable arg0) {

                        Log.d("onMyFailure", "请求数据失败");

                        Toast.makeText(MainActivity.this, "网络请求失败", 1).show();                       

                    }

                });

            }

           

            private void asyncHttpGet(){

                String url = "http://192.168.1.114/MyApp/getMeinvJson.php";

                RequestUtils.clientGet(url, new NetCallBack() {

                   

                    @Override

                    public void onMySuccess(String result) {

                        Log.e("onMySuccess", "成功返回数据:"+ result);

                        tv.setText(result);

                        Toast.makeText(MainActivity.this, result, 1).show();                       

                    }

                   

                    @Override

                    public void onMyFailure(Throwable arg0) {

                        Log.d("onMyFailure", "请求数据失败");

                        Toast.makeText(MainActivity.this, "网络请求失败", 1).show();                       

                    }

                });               

            }

 

    访问网络数据记得在清单文件中添加权限：

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