find memory cache size in bytes in android application

Rajat Kumar

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Apr 16, 2020

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public static final int MAX_MEMORY_CACHE_SIZE = 30 * 1024 *1024;   

 public static int memoryCacheSizeBytes(final Context context) {
        final ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        long memoryClass = activityManager.getMemoryClass();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            try {
                final int flagLargeHeap = ApplicationInfo.class.getDeclaredField("FLAG_LARGE_HEAP").getInt(null);
                if (StringUtils.bitMaskContainsFlag(context.getApplicationInfo().flags, flagLargeHeap)) {
                    memoryClass = (Integer) new Reflection.MethodBuilder(activityManager, "getLargeMemoryClass").execute();
                }
            } catch (Exception e) {
                Log.internal("DeviceUtils", "Unable to reflectively determine large heap size on Honeycomb and above.");
            }
        }



        long result = Math.min(MAX_MEMORY_CACHE_SIZE, memoryClass / 8 * 1024 * 1024);
        return (int) result;
    }