在activityForResult致电后，三星Galaxy S3会丢失存储为Application类静态字段的Cookie存储。我想知道为什么会这样。
注意三星Galaxy Tab 7.7和HTC Rhyme / Desire从未出现此错误。
我调用了JSONParser.getJsonFromUrl，我想执行网络操作。
getJsonFromUrl向httpClient询问UILapplication，它由HttpClientFactory提供。 Meanwile UILApplications将cooky strore恢复到客户端。我认为它应该减少互联网丢失。
public class UILApplication extends Application {
private static CookieStore mCookie = null;
public static DefaultHttpClient client;
private static DefaultHttpClient httpClient;
public static HttpClient getHttpClient() {
httpClient = HttpClientFactory
.getThreadSafeClient();
synchronized (mLock) {
if (mCookie == null) {
mCookie = httpClient.getCookieStore();
} else {
httpClient.setCookieStore(mCookie);
}
}
List<Cookie> cookies = mCookie.getCookies();
if (cookies.isEmpty()) {
Log.d("COOK", "request - none");
} else {
for (int i = 0; i < cookies.size(); i++) {
Log.d("COOK", "request - " + cookies.get(i).toString());
}
}
return httpClient;
}
}
Json解析器 - 执行网络操作的calss
public class JSONParser {
static Context context;
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
HttpResponse httpResponse = null;
InputStream is = null;
JSONObject jObj = null;
String json = "";
HttpClient httpClient = null;
if (isOnline()) {
try {
String u = url;
u = u + "?";
httpClient = UILApplication.getHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
for (int i = 0; i < params.size(); i++) {
u = u + params.get(i).getName() + "="
+ params.get(i).getValue() + "&";
}
Log.d("URL", u);
httpResponse = httpClient.execute(httpPost);
List<Cookie> cookies = ((AbstractHttpClient) httpClient)
.getCookieStore().getCookies();
if (cookies.isEmpty()) {
Log.d("COOK", "response - none");
} else {
for (int i = 0; i < cookies.size(); i++) {
Log.d("COOK", "response - " + cookies.get(i).toString());
}
}
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
Log.d("data is sent", "true");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
} catch (ClientProtocolException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
Log.d("wait", "true");
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
return null;
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
return null;
}
if (json.contains("error\":2")) {
Log.e("JSON", jObj.toString());
HttpClientFactory.killSession();
UILApplication.login = 2;
return null;
}
if (jObj != null) {
Log.d("JSON", jObj.toString());
}
return jObj;
}
return null;
}
}
HttpClientFactory
public class HttpClientFactory {
private static DefaultHttpClient client = null;
public synchronized static DefaultHttpClient getThreadSafeClient() {
if (client != null) {
Log.d("HTTPCLIEN", "REUSE");
// return client;
} else {
Log.d("HTTPCLIEN", "new");
client = new DefaultHttpClient();
client.getConnectionManager();
HttpParams params = client.getParams();
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
HttpProtocolParams.setHttpElementCharset(params, HTTP.UTF_8);
SchemeRegistry schReg = new SchemeRegistry();
schReg.register(new Scheme("http", PlainSocketFactory
.getSocketFactory(), 80));
ClientConnectionManager conMgr = new ThreadSafeClientConnManager(
params, schReg);
client = new DefaultHttpClient(conMgr, params);
// return client;
}
// synchronized (mLock) {
return client;
}
}
答案 0 :(得分：0)
这fix看起来很可靠
Idia保存cookis不是静态单例，而是saveInstance。
public class SerializedCookie implements Serializable {
private static final long serialVersionUID = 5327445113190674523L; //arbitrary
private String name;
private String value;
private String domain;
public SerializedCookie(Cookie cookie){
this.name = cookie.getName();
this.value = cookie.getValue();
this.domain = cookie.getDomain();
}
public String getName(){
return name;
}
public String getValue(){
return value;
}
public String getDomain(){
return domain;
}
}
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
List<Cookie> cookies =client.getCookies();
if (!cookies.isEmpty()){
Cookie sessionInfo = cookies.get(0);
outState.putSerializable("sessionInfo", new SerializedCookie(sessionInfo));
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (client.getCookies().isEmpty()){
if (savedInstanceState.containsKey("sessionInfo")){
SerializedCookie cookie = (SerializedCookie) savedInstanceState.
getSerializable("sessionInfo");
BasicClientCookie newCookie = new BasicClientCookie(cookie.getName(),
cookie.getValue());
newCookie.setDomain(cookie.getDomain());
client.addCookie(newCookie);
} else {
//for whatever reason the session information couldn't be obtained,
//take action here
}
}