android 网络api_Android

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允许应用程序从服务器获取数据、发送请求和处理响应，以下是一些常用的Android网络API：

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GET、POST、PUT、DELETE等HTTP方法。

主要方法：

connect(): 建立连接

getInputStream(): 获取输入流，读取服务器返回的数据

getResponseCode(): 获取HTTP响应码

getHeaderField(String name): 获取指定名称的响应头字段值

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.openConnection();
                    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，支持连接池等特性。

主要方法：

newCall(Request request): 创建一个新的请求并执行，返回一个Call对象，用于发送请求和处理响应。

enqueue(Callback callback, Object tag): 将请求添加到队列中，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执行的请求，此方法无效。

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~

以下是一个关于Android网络API的介绍示例，该介绍列出了常用的网络API类别、对应的主要功能以及一些常见的库或方法。

这个介绍仅作为参考，实际开发中可以根据项目需求选择合适的网络API和技术。