Android-网络通信框架Volley使用详解

1 Volley发送get请求：

public void getJson() {
String url = "http://"+host+":8080/web/json.jsp?username=xjs&password=123456";
mQueue.add(new JsonObjectRequest(Method.GET, url, null,
new Listener<jsonobject>() {
@Override
public void onResponse(JSONObject response) {
Log.e(TAG, "response : " + response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
String err = error.getMessage();
Log.e(TAG, "err : " + err);
}
}));
}
</jsonobject>
2 Volley发送post请求：
public void postJson() {
String url = "http://"+host+":8080/web/json.jsp";
StringRequest postRequest = new StringRequest(
Request.Method.POST,
url,
new Response.Listener<string>() {
@Override
public void onResponse(String response) {
// response
Log.d("Response", response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// error
Log.d("Error.Response", error.getMessage());
}
}) {
@Override
protected Map<string, string=""> getParams() {
Map<string, string=""> params = new HashMap<string, string="">();
params.put("username", "xjs");
params.put("password", "123456");
return params;
}
};
mQueue.add(postRequest);
}</string,></string,></string,></string>

3 Volley获取网络图片：
public void getImage() {
String imageUrl = "http://"+host+":8080/web/image.jsp";
NetworkImageView view = (NetworkImageView) findViewById(R.id.network_image_view);
view.setDefaultImageResId(android.R.drawable.ic_menu_rotate);
view.setErrorImageResId(android.R.drawable.ic_delete);
view.setImageUrl(imageUrl, new ImageLoader(mQueue, new BitmapLruCache(1024 * 4)));
}
4 Volley发送Https请求，需要修改源码：
protected HttpURLConnection createConnection(URL url) throws IOException {
if (url.toString().toLowerCase(Locale.CHINA).startsWith("https")) {
HTTPSTrustManager.allowAllSSL();
}
return (HttpURLConnection) url.openConnection();
}
//HTTPSTrustManager.java:
public class HTTPSTrustManager implements X509TrustManager {
private static TrustManager[] trustManagers;
private static final X509Certificate[] _AcceptedIssuers = new X509Certificate[] {};
@Override
public void checkClientTrusted(
java.security.cert.X509Certificate[] x509Certificates, String s)
throws java.security.cert.CertificateException {
// To change body of implemented methods use File | Settings | File
// Templates.
}
@Override
public void checkServerTrusted(
java.security.cert.X509Certificate[] x509Certificates, String s)
throws java.security.cert.CertificateException {
// To change body of implemented methods use File | Settings | File
// Templates.
}
public boolean isClientTrusted(X509Certificate[] chain) {
return true;
}
public boolean isServerTrusted(X509Certificate[] chain) {
return true;
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return _AcceptedIssuers;
}
public static void allowAllSSL() {
HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String arg0, SSLSession arg1) {
// TODO Auto-generated method stub
return true;
}
});
SSLContext context = null;
if (trustManagers == null) {
trustManagers = new TrustManager[] { new HTTPSTrustManager() };
}
try {
context = SSLContext.getInstance("TLS");
context.init(null, trustManagers, new SecureRandom());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
}
HttpsURLConnection.setDefaultSSLSocketFactory(context.getSocketFactory());
}
}
5 Volley获取服务端返回的cookie，需要修改源码：
@Override
public HttpResponse performRequest(Request<!--?--> request,Map<string, string=""> additionalHeaders)
throws IOException,AuthFailureError {
for (Entry<string, list<string="">> header : connection.getHeaderFields().entrySet()) {
if (header.getKey() != null) {
String key = header.getKey();
List<string> values = header.getValue();
if(key.equalsIgnoreCase("set-cookie")){
StringBuilder cookieString = new StringBuilder();
for(String value : values){
cookieString.append(value).append("\n");//用\n作为分隔符，cookie中不应该有回车符号
}
cookieString.deleteCharAt(cookieString.length() - 1);
Header h = new BasicHeader(header.getKey(), cookieString.toString());
response.addHeader(h);
}else{
Header h = new BasicHeader(header.getKey(), values.get(0));
response.addHeader(h);
}
}
}
}
//然后再request中重写parseNetworkResponse（）：
@Override
protected Response<string> parseNetworkResponse(NetworkResponse response) {
Response<string> superResponse = super.parseNetworkResponse(response);
Map<string, string=""> responseHeaders = response.headers;
String rawCookies = responseHeaders.get("Set-Cookie");
//服务端返回是 set-cookie:JSESSIONID=D90B58454550B4D37C4B66A76BF27B93; Path=/otn BIGipServerotn=2564030730.64545.0000; path=/
String part1 = substring(rawCookies, "", ";");
String part2 = substring(rawCookies, "\n", ";");
//客户端需要的是 cookie:JSESSIONID=D90B58454550B4D37C4B66A76BF27B93; BIGipServerotn=2564030730.64545.0000;
cookies = part1 + "; " + part2 + ";";
return superResponse;
}
</string,></string></string></string></string,></string,>
6 Volley发请求的时候上传cookie，在request中重写getHeaders（）：
@Override
public Map<string, string="">getHeaders() throws AuthFailureError {
if(cookies!= null && cookies.length() > 0){
HashMap<string,string> headers = newHashMap<string, string="">();
headers.put("Cookie",cookies);
returnheaders;
}
returnsuper.getHeaders();
}
</string,></string,string></string,>
7 Volley自定义request：
public class ByteArrayRequest extends Request<byte[]>{
private final Listener<byte[]> mListener;
public ByteArrayRequest(int method, String url, Listener<byte[]> listener, ErrorListener errlistener) {
super(method, url, errlistener);
mListener = listener;
}
@Override
protected Response<byte[]> parseNetworkResponse(NetworkResponse response) {
if(response == null){
return null;
}
if(response.statusCode != HttpStatus.SC_OK){
return null;
}
byte[] bytes = response.data;
return Response.success(bytes, null);
}
@Override
protected void deliverResponse(byte[] response) {
if(mListener != null){
mListener.onResponse(response);
}
}
}
</byte[]></byte[]></byte[]></byte[]>
8 Volley设置请求超时时间：
@Override
public RetryPolicy getRetryPolicy() {
RetryPolic
bd6f
yretryPolicy = new DefaultRetryPolicy(5000,DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
returnretryPolicy;
}