CacheDirectory.java

package com.vinay.volley.lazyload;

import java.io.File;

import android.content.Context;
import android.os.Environment;

public class CacheDirectory {
	/**
	 * Get a usable cache directory (external if available, internal otherwise).
	 * 
	 * @param context
	 *            The context to use
	 * @param uniqueName
	 *            A unique directory name to append to the cache dir
	 * @return The cache dir
	 */
	public static File getDiskCacheDir(Context context, String uniqueName) {
		// Check if media is mounted or storage is built-in, if so, try and use external cache dir
		// otherwise use internal cache dir

		// TODO: getCacheDir() should be moved to a background thread as it attempts to create the
		// directory if it does not exist (no disk access should happen on the main/UI thread).
		final String cachePath = Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())
				|| !Environment.isExternalStorageRemovable() ? getExternalCacheDir(context).getPath() : context
				.getCacheDir().getPath();

		return new File(cachePath + File.separator + uniqueName);
	}

	/**
	 * Get the external app cache directory.
	 * 
	 * @param context
	 *            The context to use
	 * @return The external cache dir
	 */
	private static File getExternalCacheDir(Context context) {
		// TODO: This needs to be moved to a background thread to ensure no disk access on the
		// main/UI thread as unfortunately getExternalCacheDir() calls mkdirs() for us (even
		// though the Volley library will later try and call mkdirs() as well from a background
		// thread).
		return context.getExternalCacheDir();
	}
}