Stub icon scaling and allow background updating of the applist

app/src/main/java/com/limelight/utils/CacheHelper.java

@@ -0,0 +1,55 @@
+package com.limelight.utils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.Reader;
+import java.io.UnsupportedEncodingException;
+import java.util.Scanner;
+
+public class CacheHelper {
+    private static File openPath(boolean createPath, File root, String... path) {
+        File f = root;
+        for (int i = 0; i < path.length; i++) {
+            String component = path[i];
+
+            if (i == path.length - 1) {
+                // This is the file component so now we create parent directories
+                if (createPath) {
+                    f.mkdirs();
+                }
+            }
+
+            f = new File(f, component);
+        }
+        return f;
+    }
+
+    public static FileInputStream openCacheFileForInput(File root, String... path) throws FileNotFoundException {
+        return new FileInputStream(openPath(false, root, path));
+    }
+
+    public static FileOutputStream openCacheFileForOutput(File root, String... path) throws FileNotFoundException {
+        return new FileOutputStream(openPath(true, root, path));
+    }
+
+    public static String readInputStreamToString(InputStream in) {
+        Scanner s = new Scanner(in);
+
+        StringBuilder sb = new StringBuilder();
+        while (s.hasNext()) {
+            sb.append(s.next());
+        }
+
+        return sb.toString();
+    }
+
+    public static void writeStringToOutputStream(OutputStream out, String str) throws IOException {
+        out.write(str.getBytes("UTF-8"));
+    }
+}