1. 封裝HttpURLConnection的網(wǎng)絡(luò)請求

• 首先定義一個接口作為網(wǎng)絡(luò)請求結(jié)果的回調(diào)

///定義一個接口
public interface HttpCallbackListener {
    //網(wǎng)絡(luò)請求成功時的回調(diào)
    void onFinish(String response);
    //網(wǎng)絡(luò)請求失敗時的回調(diào)
    void onError(Exception e);
}

• 然后封裝網(wǎng)絡(luò)請求的代碼

public class HttpUtil {
    public static void sendHttpRequest(final String address, final HttpCallbackListener listener) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                HttpURLConnection connection = null;
                try {
                    URL url = new URL(address);
                    connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(8000);
                    connection.setReadTimeout(8000);
                    connection.setDoInput(true);
                    connection.setDoOutput(true);
                    InputStream in = connection.getInputStream();
                    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                    StringBuilder response = new StringBuilder();
                    String line;
                    while ((line = reader.readLine()) != null) {
                        response.append(line);
                    }
                    if (listener != null) {
                        //接收到服務(wù)器返回的數(shù)據(jù)，回調(diào)onFinish方法，將數(shù)據(jù)傳出去
                        listener.onFinish(response.toString());
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                    //請求出錯象缀，回調(diào)onError()方法
                    listener.onError(e);
                } finally {
                    if (connection != null) {
                        connection.disconnect();
                    }
                }
            }
        }).start();
    }
}

• 調(diào)用實例

String address = "http://10.0.2.2/get_data.json";
HttpUtil.sendHttpRequest(address, new HttpCallbackListener() {
                    @Override
                    public void onFinish(String response) {
                        //解析服務(wù)器返回的數(shù)據(jù)
                        parseJSONWithGSON(response);
                    }
                    @Override
                    public void onError(Exception e) {
                        //請求失敗做的操作
                    }
                });

2. 封裝OKHttp的網(wǎng)絡(luò)請求

• 封裝代碼如下

    ///封裝OKHttp的網(wǎng)絡(luò)請求
    public static void sendOkHttpRequest(String address, okhttp3.Callback callback) {
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url(address)
                .build();
        client.newCall(request).enqueue(callback);
    }

• 調(diào)用實例

String address = "http://10.0.2.2/get_data.json";
               HttpUtil.sendOkHttpRequest(address, new Callback() {
                   @Override
                   public void onFailure(Call call, IOException e) {
                       //請求失敗時調(diào)用
                   }
                   @Override
                   public void onResponse(Call call, Response response) throws IOException {
                       //收到服務(wù)器返回的數(shù)據(jù)調(diào)用
                       //收到服務(wù)器返回的數(shù)據(jù)調(diào)用
                       String responseData = response.body().string();
                       showRespons(responseData);
                   }
               });