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在Android中，网络API是用于与服务器进行通信的一组类和方法，这些API允许应(ying)用(yong)程(cheng)序从服务器获取数据、发送请求和处理响应，以下是一些(xie)常用的Android网络API：（图片(pian)来源网络，侵删）
1、HttpURLConnection
2、OkHttp
3、Retrofit
4、Volley
1. HttpURLConnection
HttpURLConnection是Android内置的一个HTTP客户端，可以用来发送HTTP请求和接收HTTP响应，它支持(chi)GET、POST、PUT、DELETE等HTTP方法(fa)。
主要方法：
（图(tu)片来源网络，侵删）connect(): 建立连接
getInputStream(): 获取输入流，读取服务(wu)器返回的数据
getResponseCode(): 获取HTTP响应码
getHeaderField(String name): 获取指定(ding)名称的响应(ying)头字段值
示例代码：
import java.io.BufferedReader;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); new Thread(new Runnable() { @Override public void run() { try { URL url = new URL("https://api.example.com/data"); HttpURLConnection connection = (HttpURLConnection) url.open=""Connection(); connection.setRequestMethod("GET"); connection.setConnectTimeout(5000); connection.setReadTimeout(5000); connection.connect(); int responseCode = connection.getResponseCode(); if (responseCode == HttpURLConnection.HTTP_OK) { BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream())); String line; while ((line = reader.readLine()) != null) { Log.d("MainActivity", line); } reader.close(); } else { Log.e("MainActivity", "请求失败，响(xiang)应码：" + responseCode); } connection.disconnect(); } catch (Exception e) { e.printStackTrace(); } } }).start(); }}2. OkHttp
OkHttp是一个高效的HTTP客户端，用(yong)于Android和Java应用，它支持同步和异步请求，可以缓存请求结果，支持(chi)连接池等特性。
（图片来源网络，侵删）主要方法：
newCall(Request request): 创建一个新(xin)的请求并执行，返回(hui)一个Call对象，用(yong)于发送请求和处理响(xiang)应。
enqueue(Callback callback, Object tag): 将请求添加(jia)到队(dui)列中，异步执行，当请求完成时，会调用回调函数。
cancel(): 取消当前请求，如果请求已经完成或者没有正在(zai)执行的请求，此(ci)方法无效。
execute(): 同步执行请求，返回响应结果，注意：这个方法会阻塞主线程，不建议在UI线程中使用。
示例代码：
import okhttp3.*;import java.io.IOException;import java.util.concurrent.TimeUnit;import okhttp3.logging.HttpLoggingInterceptor;import okhttp3.logging.OkHttpLogger;import okhttp3.logging.Level;import org.json.JSONObject;import org.json.JSONArray;import java.util.List;import java.util.Map;import java.util.HashMap;import java.util.concurrent.*; // for futures and promises in the examples below, if needed... // https://github.com/square/okhttp/wiki/Recipes#usingfuturesandpromisesinokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usingasynccallbackswithokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usingsynchronizationwithokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usingtimeoutswithokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usingcookieswithokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usinginterceptorswithokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usingproxieswithokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usingssltlssocketfactorywithokhttpclientscallsandlisteners // https://github.com/square/okhttp/wiki/Recipes#usingcacheswithokhttpclientscallsandlisteners// http://square.github.io/okhttp/3.x/okhttp/okhttp3/Call.html// http://square.github.io/okhttp/3.x/okhttp/okhttp3/Callback.html// http://square.github.io/okhttp/3.x/okhttp/okhttp3/ResponseBody.html// http://square.github.io/okhttp/3.x/okhttp/okhttp3/ResponseBodySourceCallbacksAdapterFactory$SourceCallbacksAdapter$1$1$1$1$1$1$1$1$1$1$1$.html// http://square.github.io/okhttp/3.x/okhttp/okhttp3/ResponseBodySourceCallbacksAdapterFactory$SourceCallbacksAdapter$1$1$1$1$1$1$1$1$1$1$1$.html// http://square.github.io/okhttp/3.x/okhttpclient/OkHttpClientBuilder$OkHttpClientBuilderConfigurationBuilder$addInterceptorBuilder$addInterceptorBuilder$addInterceptorBuilder().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$OkHttpClientBuilderConfigurationBuilder$addNetworkInterceptorBuilder().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$OkHttpClientBuilderConfigurationBuilder$addCacheInterceptorBuilder().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$OkHttpClientBuilderConfigurationBuilder$addProtocolInterceptorBuilder().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$OkHttpClientBuilderConfigurationBuilder$addProxyInterceptorBuilder().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$build().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$addInterceptor().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$addNetworkInterceptor().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$addCacheInterceptor().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$addProtocolInterceptor().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$addProxyInterceptor().html// http://square.github.io/okhttpclient/OkHttpClientBuilder$build().html// http://square.github.io/okhttpclient/CallExecutorServiceCallExecuterFactory$$Lambda$79684697254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254997254lambda~以下是一个(ge)关于Android网络API的介绍示(shi)例，该介绍列出了(le)常用的(de)网络API类别、对应的主要功能以及一些常见的库或方法。
| API类别 | 功能描述 | 常见库/方法 |
| HTTP请求 | 发送和接收网络请求，如GET、POST、PUT、DELETE等 | OkHttp、Retrofit、Volley、HttpURLConnection |
| JSON解析 | 解析和生成JSON格式(shi)的数据 | Gson、Jackson、Fastjson、org.json |
| XML解析 | 解(jie)析和生成XML格式的数据 | PullParser、SAXParser、org.xmlpull.v1.XmlPullParser |
| 网络图(tu)片加载 | 异步加载网络图片，支持缓存、变换等 | Glide、Picasso、Fresco、Universal Image Loader |
| 网络视频播放 | 实现网络视频的播放(fang)功能 | ExoPlayer、IjkPlayer、MediaPlayer |
| 网络数据加密 | 对网络传输的数据进行加密和解密 | open=""SSL、Bouncy Castle、Conscrypt |
| WebSocket | 实现(xian)客户端与服务器(qi)间的实时通信 | JavaWebSocket、OkHttp WebSocket |
| Socket编程 | 使用TCP/UDP协议进行网络通信 | java.net.Socket、java.net.DatagramSocket |
| 文件上传与下载 | 实现文件的上传和下载(zai)功能 | OkHttp、Retrofit、Androidasynchttp |
| 网络监测 | 监测网络状态和速度，优化应用性能 | Network Monitor、Android API（ConnectivityManager） |
OAuth认证 | 实现(xian)第三方登录和授权功能 | OAuthlib、Signpost、GoogleAuthUtil |
| RESTful API | 提供基(ji)于REST架构的(de)网络服务，便于应用间数据交(jiao)互 | Retrofit、Spring Boot、Jersey |
这个介绍仅作为参考，实际开发中可(ke)以根据项目需求选择合适的网络API和技术。
