其实在最早的版本里，Volley甚至是不支持https协议的，只能跑http，当然你也可以自己修改他的源码让他支持，如今volley的代码经过一些改进以后，
已经可以完美支持https协议了，无论是在2.3版本以上还是在2.3版本以下，大家可以尝试用volley去访问github 是成功的，但是你如果用volley去访问
12306这种类似的 用自定义证书的网站 就很容易失败。那我下面就把volley 代码稍作修改，让volley也可以完美支持自定义证书的https请求。
当然代码只是展示功能使用，你们可以用更优雅的方式 ----实现一个HttpStack，然后直接传你自定义好的stack即可。我这里图简便就写了个最简单
的演示代码。其实难倒是也不难，主要还是要考虑2.3版本以上和以下的两种情况。
第一步，把你的自定义证书 拷贝到res/raw/下。
第二步，稍微修改下volley的源码
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/ package com.android.volley.toolbox; import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.http.AndroidHttpClient;
import android.os.Build;
import android.util.Log; import com.android.volley.Network;
import com.android.volley.RequestQueue; import org.apache.http.client.HttpClient;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams; import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory; import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManagerFactory; public class Volley { /**
* Default on-disk cache directory.
*/
private static final String DEFAULT_CACHE_DIR = "volley"; private Context mContext; /**
* Creates a default instance of the worker pool and calls {@link RequestQueue#start()} on it.
*
* @param context A {@link Context} to use for creating the cache dir.
* @param stack An {@link HttpStack} to use for the network, or null for default.
* @return A started {@link RequestQueue} instance.
*/
public static RequestQueue newRequestQueue(Context context, HttpStack stack, boolean selfSignedCertificate, int rawId) {
File cacheDir = new File(context.getCacheDir(), DEFAULT_CACHE_DIR); String userAgent = "volley/0";
try {
String packageName = context.getPackageName();
PackageInfo info = context.getPackageManager().getPackageInfo(packageName, 0);
userAgent = packageName + "/" + info.versionCode;
} catch (NameNotFoundException e) {
} if (stack == null) {
if (Build.VERSION.SDK_INT >= 9) {
if (selfSignedCertificate) {
stack = new HurlStack(null, buildSSLSocketFactory(context, rawId));
} else {
stack = new HurlStack();
}
} else {
// Prior to Gingerbread, HttpUrlConnection was unreliable.
// See: http://android-developers.blogspot.com/2011/09/androids-http-clients.html
if (selfSignedCertificate)
stack = new HttpClientStack(getHttpClient(context, rawId));
else {
stack = new HttpClientStack(AndroidHttpClient.newInstance(userAgent));
}
}
} Network network = new BasicNetwork(stack); RequestQueue queue = new RequestQueue(new DiskBasedCache(cacheDir), network);
queue.start(); return queue;
} /**
* Creates a default instance of the worker pool and calls {@link RequestQueue#start()} on it.
*
* @param context A {@link Context} to use for creating the cache dir.
* @return A started {@link RequestQueue} instance.
*/
public static RequestQueue newRequestQueue(Context context) {
return newRequestQueue(context, null, false, 0);
} private static SSLSocketFactory buildSSLSocketFactory(Context context, int certRawResId) {
KeyStore keyStore = null;
try {
keyStore = buildKeyStore(context, certRawResId);
} catch (KeyStoreException e) {
e.printStackTrace();
} catch (CertificateException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
TrustManagerFactory tmf = null;
try {
tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
tmf.init(keyStore); } catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyStoreException e) {
e.printStackTrace();
} SSLContext sslContext = null;
try {
sslContext = SSLContext.getInstance("TLS");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
try {
sslContext.init(null, tmf.getTrustManagers(), null);
} catch (KeyManagementException e) {
e.printStackTrace();
} return sslContext.getSocketFactory(); } private static HttpClient getHttpClient(Context context, int certRawResId) {
KeyStore keyStore = null;
try {
keyStore = buildKeyStore(context, certRawResId);
} catch (KeyStoreException e) {
e.printStackTrace();
} catch (CertificateException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (keyStore != null) {
}
org.apache.http.conn.ssl.SSLSocketFactory sslSocketFactory = null;
try {
sslSocketFactory = new org.apache.http.conn.ssl.SSLSocketFactory(keyStore);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
} catch (KeyStoreException e) {
e.printStackTrace();
} catch (UnrecoverableKeyException e) {
e.printStackTrace();
} HttpParams params = new BasicHttpParams(); SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
schemeRegistry.register(new Scheme("https", sslSocketFactory, 443)); ThreadSafeClientConnManager cm = new ThreadSafeClientConnManager(params, schemeRegistry); return new DefaultHttpClient(cm, params);
} private static KeyStore buildKeyStore(Context context, int certRawResId) throws KeyStoreException, CertificateException, NoSuchAlgorithmException, IOException {
String keyStoreType = KeyStore.getDefaultType();
KeyStore keyStore = KeyStore.getInstance(keyStoreType);
keyStore.load(null, null); Certificate cert = readCert(context, certRawResId);
keyStore.setCertificateEntry("ca", cert); return keyStore;
} private static Certificate readCert(Context context, int certResourceID) {
InputStream inputStream = context.getResources().openRawResource(certResourceID);
Certificate ca = null; CertificateFactory cf = null;
try {
cf = CertificateFactory.getInstance("X.509");
ca = cf.generateCertificate(inputStream); } catch (CertificateException e) {
e.printStackTrace();
}
return ca;
}
}
第三步就是调用方式稍微做下修改：
其实主要就是你如果想使用自定义的证书https的时候 第三个参数记得传true，并且把证书也传进去，
当然写的优雅的话还是最好自己写个httpstack，然后volley的源码可以不用改，只需要在使用的时候
传自己的stack即可