【发布时间】：2015-03-29 12:46:51
【问题描述】：
我是安卓的初学者。 我正在处理客户端代码，我必须读取服务器上存储的图像并将其显示在 imageview 中。 我参考了一些 stackoverflow 问题，但无法成功。 我用 HttpsURLConnection 类做了简单的纯 java 程序我从服务器得到了一些二进制响应图像，用纯 java 代码就可以了。 但是当我在 android 中尝试同样的事情时，我得到了例外：
01-29 18:39:28.199: WARN/System.err(2045): java.io.IOException: SSL handshake failure: I/O error during system call, Unknown error: 0
01-29 18:39:28.249: WARN/System.err(2045): at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.nativeconnect(Native Method)
01-29 18:39:28.249: WARN/System.err(2045): at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:316)
01-29 18:39:28.249: WARN/System.err(2045): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.getSecureSocket(HttpConnection.java:168)
01-29 18:39:28.249: WARN/System.err(2045): at org.apache.harmony.luni.internal.net.www.protocol.https.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:399)
这是我的示例图片的公共 URL：
https://s3-ap-southeast-1.amazonaws.com/edt-demo-app/app-images/Mobile.jpg
在纯 java 中对我来说可以正常工作的代码如下：
package com.psl.dao;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
mport javax.net.ssl.HttpsURLConnection;
public class HttpsClient{
public static void main(String[] args)
{
String url = "https://s3-ap-southeast-1.amazonaws.com/edt-demo-app/app-images/Mobile.jpg";
try {
new HttpsClient().print(url);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void print(String url)throws Exception
{
String httpsURL = url;
URL myurl = new URL(httpsURL);
System.setProperty("https.proxyHost", "puproxy.company.co.in");
System.setProperty("https.proxyPort", "8080");
HttpsURLConnection con = (HttpsURLConnection)myurl.openConnection();
System.out.println(con.toString());
InputStream ins = con.getInputStream();
InputStreamReader isr = new InputStreamReader(ins);
BufferedReader in = new BufferedReader(isr);
String inputLine;
while ((inputLine = in.readLine()) != null)
{
System.out.println(inputLine);
}
in.close();
}
}
然后我参考了一些 android 教程并在我的 android 应用程序中尝试了以下代码：
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.net.URLConnection;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
public class TestSSL {
public static void main(String[] args) throws Exception {
// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(X509Certificate[] certs, String authType) {
}
} };
// Install the all-trusting trust manager
final SSLContext sc = SSLContext.getInstance("TLS");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
// Create all-trusting host name verifier
HostnameVerifier allHostsValid = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
// Install the all-trusting host verifier
HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
System.setProperty("https.proxyHost", "puproxy.company.co.in");
System.setProperty("https.proxyPort", "8080");
URL url = new URL("https://s3-ap-southeast-1.amazonaws.com/edt-demo-app/app-images/Mobile.jpg");
URLConnection con = url.openConnection();
final Reader reader = new InputStreamReader(con.getInputStream());
final BufferedReader br = new BufferedReader(reader);
String line = "";
while ((line = br.readLine()) != null) {
Log.d("tag",line+"");
}
br.close();
} // End of main
} // End of the class //
但我得到了上面所说的异常：
01-29 18:39:28.199: WARN/System.err(2045): java.io.IOException: SSL handshake failure: I/O error during system call, Unknown error: 0
欢迎使用异步加载图像与 Apache HttpClient 或 Async HttpClient 客户端库一起正常工作的任何其他代码。 另外我不知道如何在android中进行代理设置。所以请用各自的参数为我做这件事
我已尝试按照教程进行操作，但我的图像未显示。
http://javatechig.com/android/download-image-using-asynctask-in-android
上述教程适用于 Http URL 但不适用于 Https
我希望上面教程中的代码适用于 HTTPS URL 暂时考虑服务器证书对我来说并不重要。
【问题讨论】：
-
试试毕加索图书馆 => square.github.io/picasso
-
谢谢...它不适用于 HTTPS URL..它适用于 HTTP URL
标签： java android https amazon-s3 android-asynctask