creating cache folder

Question

Hi,

I'm trying to cache an image obtain from a webside. However, CacheManager.getCacheFileBaseDir() always returns null. Do I need to create the cache folder in the android emulator? if yes, how can I do it? in which directory i need to create it in? Thanks in advance for helping.

Answer 1

Don't use that. There's a documentation issue per this answer. Use Context#getCacheDir for a cache dir specific to your application. You'll have to do all the cache management yourself, however, the framework will manage the contents on low disk space and when your application is uninstalled.

Answer 2

If you're going to cache a lot of data you should use SD card for that not internal memory. So you can just create a directory on SD card and save your cache in it.

File cacheDir;
//Choose chache directory
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
  cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"MyCache");
else
  cacheDir=context.getCacheDir();
//File in cache directory
File f=new File(cacheDir, "file.txt");