Android遇上HTTP/2

public SSLContext getSSLContext() {
	    try {
			// 生成SSLContext对象
			SSLContext sslContext = SSLContext.getInstance("TLS");
			// 从assets中加载证书
			InputStream inStream = getAssets().open("enzo.crt");

			// 证书工厂this
			CertificateFactory cerFactory = CertificateFactory.getInstance("X.509");
			Certificate cer = cerFactory.generateCertificate(inStream);
 
			// 密钥库
			KeyStore kStore = KeyStore.getInstance("PKCS12");//如果是运行在PC端，这里需要将PKCS12替换成JKS
			kStore.load(null, null);
			kStore.setCertificateEntry("trust", cer);// 加载证书到密钥库中
 
			// 密钥管理器
			KeyManagerFactory keyFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
			keyFactory.init(kStore, null);// 加载密钥库到管理器
 
			// 信任管理器
			TrustManagerFactory tFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tFactory.init(kStore);// 加载密钥库到信任管理器
 
			// 初始化
			sslContext.init(keyFactory.getKeyManagers(), tFactory.getTrustManagers(), new SecureRandom());
			return sslContext;
		} catch (UnrecoverableKeyException e) {
			e.printStackTrace();
		} catch (KeyManagementException e) {
			e.printStackTrace();
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (CertificateException e) {
			e.printStackTrace();
		} catch (KeyStoreException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}

public void testURLConnection() {
		try {
			String path = "https://enzo.com";
			// 新建一个URL对象
			URL url = new URL(path);
			
			// 打开一个HttpsURLConnection连接
			SSLContext sc = getSSLContext();
                        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
			HttpsURLConnection conn = (HttpsURLConnection)  url.openConnection();
			
	                // 设置连接超时时间
			conn.setConnectTimeout(5 * 1000);
			// 开始连接
			conn.connect();
			// 判断请求是否成功
			if (conn.getResponseCode() == 200) {
				// 获取返回的数据
				byte[] data = readStream(conn.getInputStream());
				Log.i("---wyf---", "Get方式请求成功，返回数据如下：");
				Log.i("---wyf---", new String(data, "UTF-8"));
			} else {
				Log.i("---wyf---", "Get方式请求失败:"+conn.getResponseCode());
			}
			// 关闭连接
			conn.disconnect();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

public void testOkHttp() {
		try {
			String path = "https://enzo.com";
			// 新建一个URL对象
			URL url = new URL(path);
			
			// 打开一个OkHttpClient连接
			SSLContext sc = getSSLContext();
			List<Protocol> protocols = new ArrayList<Protocol>();
			protocols.add(Protocol.HTTP_1_1);
			protocols.add(Protocol.HTTP_2);
			OkHttpClient client = new OkHttpClient.Builder().protocols(protocols)
			        .sslSocketFactory(sc.getSocketFactory())
			        .build();
			
			Request request = new Request.Builder().url(url).build();
		    Response response = client.newCall(request).execute();
		    if (response.isSuccessful()) {
		    	Log.i("---wyf---", "Get方式请求成功，返回数据如下：");
				Log.i("---wyf---", response.body().string());
				Log.d("---wyf---", "Protocol: " + response.protocol());
		    } else {
		    	Log.i("---wyf---", "Get方式请求失败:"+response);
		    }
	
		} catch (Exception e) {
			e.printStackTrace();
		}
	}