Android http请求使用接口回调
16lz
2021-01-23
Android中不支持在主线程发起http请求数据，我们需要把http请求放到子线程中处理。为了保证代码的执行顺序，可以使用接口回调的方式拿到请求到的数据并进行处理。
定义回调接口
public interface OnConnectResult { // 把请求的内容转为String类型 void connectResultString(String result);}http请求类
http请求类的结构
public class HttpUtil { private static final String DEFAULT_PARAMS_ENCODING = "UTF-8"; private static final int CONNECT_TIME_OUT = 10 * 1000; private static final int READ_TIME_OUT = 30 * 1000; // 此类中的方法只处理http的GET请求 private static final String REQUEST_GET_METHOD = "GET"; // 实现http请求返回String类型的方法。 // 此方法中OnConnectResult接口类型的参数是为了返回数据 public static void performGetRequestToStringWithResult(final String urlStr, final OnConnectResult onConnectResult) { try { if (onConnectResult == null) { return; } // 创建一个子线程处理http请求 new Thread(new Runnable() { @Override public void run() { // 处理http请求 String resultStr = performGetRequestToString(urlStr); // 通过接口回调的方式把http请求的内容返回到调用的地方 if (onConnectResult != null) { onConnectResult.connectResultString(resultStr); } } }).start(); } catch (Exception e) { e.printStackTrace(); } } // 处理http/https的GET请求，返回结果为String类型 public static String performGetRequestToString(String urlStr) { String result = null; HttpURLConnection httpURLConnection = null; InputStream inputStream = null; try { URL url = new URL(urlStr); // 判断https还是http if (url.getProtocol().toLowerCase().equals("https")) { HostnameVerifier hnv = new HostnameVerifier() { @Override public boolean verify(String hostname, SSLSession session) { return true; } }; X509TrustManager trustManager = new X509TrustManager() { @Override public void checkClientTrusted( java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {} @Override public void checkServerTrusted( java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {} @Override public java.security.cert.X509Certificate[] getAcceptedIssuers() { return null; } }; X509TrustManager[] xtmArray = new X509TrustManager[] { trustManager }; SSLContext sslContext = SSLContext.getInstance("TLS"); sslContext.init(null, xtmArray, new java.security.SecureRandom()); if (sslContext != null) { HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory()); } HttpsURLConnection.setDefaultHostnameVerifier(hnv); httpURLConnection = (HttpsURLConnection) url.openConnection(); } else if (url.getProtocol().toLowerCase().equals("http")) { httpURLConnection = (HttpURLConnection) url.openConnection(); } httpURLConnection.setConnectTimeout(CONNECT_TIME_OUT); httpURLConnection.setReadTimeout(READ_TIME_OUT); httpURLConnection.setRequestMethod(REQUEST_GET_METHOD); httpURLConnection.setDoInput(true); if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) { inputStream = httpURLConnection.getInputStream(); // 把请求到的InputStream转为String result = getResultString(inputStream, DEFAULT_PARAMS_ENCODING); } } catch (Exception e) { e.printStackTrace(); } finally { if (inputStream != null) { try { inputStream.close(); } catch (Exception e) { e.printStackTrace(); } } if (httpURLConnection != null) { httpURLConnection.disconnect(); } } return result; } // 把InputStream转为String private static String getResultString(InputStream inputStream, String encode) { String result = null; ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); byte[] data = new byte[1024]; int len = 0; if (inputStream != null) { try { while ((len = inputStream.read(data)) != -1) { outputStream.write(data, 0, len); } result = new String(outputStream.toByteArray(), encode); } catch (IOException e) { e.printStackTrace(); } finally { if (outputStream != null) { try { outputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } } return result; } // 添加一个额外的方法，此方法把http请求强制转为https请求 private static String httpForceToHttps(String urlStr) { try { if (urlStr == null || urlStr.isEmpty()) { return urlStr; } URL url = new URL(urlStr); String protocol = url.getProtocol().toLowerCase(); if (protocol.toLowerCase().equals("https")) { return urlStr; } if (protocol.toLowerCase().equals("http")) { String newUrlStr = urlStr.replace("http://", "https://"); return newUrlStr; } } catch (Exception e) { e.printStackTrace(); } return urlStr; }}更多相关文章
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