volley cache return always null

In order to cache anything with Volley you need to have two things:
1) server allows you to cache it. it usually appears in a cache control tag in the HTTP header.
2) you save it or in this scenario you tell the Volly to save.
so i think your problem is in number one. that means the server dose not allow you to cache those files, in order to confirm my answer you can do one of these things:
  1. download this plug in (RESTClient) for mozilla and send your request and check the header file for cache control. if the server dose not allow you to cache you will see something like below image, notice cache control tag
enter image description here
  1. set break point in headerValue = headers.get("Cache-Control"); at HttpHeaderParse class and see whats going on when Volley wants to parse the cache control tag.

Comments

Post a Comment

Popular posts from this blog

RUN JAVA PROJECT IN ANDROID STUDIO

You can compile and run java module as stand alone java project in Android Studio IDE. Follow the below steps  Open your Android project in Android Studio. If you do not have one, create one. Click  File > New Module . Select  Java Library  and click  Next . Fill in the package name, etc and click  Finish . You should now see a Java module inside your Android project. Add your code to the Java module you’ve just created. Click on the drop down to the left of the run button. Click  Edit Configurations… In the new window, click on the plus sign at the top left of the window and select  Application A new application configuration should appear, enter in the details such as your main class and classpath of your module.
Read more

Gradle DSL method not found: 'compile()'

As the note of your project's  build.gradle  file suggests: // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files Remove the 2 compile statements in that gradle file: compile 'com.android.support:appcompat-v7:20.+' compile 'com.google.android.gms:play-services:6.5.+' And then make your other (module's)  build.gradle  dependencies look like this: dependencies { compile fileTree ( dir : 'libs' , include : [ '*.jar' ]) compile 'com.android.support:appcompat-v7:21.0.3' compile 'com.google.android.gms:play-services:6.5.+' }
Read more

Reverse string using recursion

#include <stdio.h> #include <string.h> void reverse(char str[], int, int); int main() {         int size = 0;         char str[20];         printf ("Enter the your string \n");         scanf ("%s", str);         size = strlen(str);         reverse(str, 0, size - 1);         printf ("String after reverse : %s\n", str);         return 0; } void reverse(char str[], int index, int size) {         char temp;         temp = str[index];         str[index] = str[size - index];         str[size - index] = temp;         if (index == (size / 2)) {                 return;         }         reverse(str, index + 1, size); }
Read more