File Caching and File Resolution

I have a problem with caching in my application and deployment on 4.2.x devices.

When I save the file in the application cache directory, I cannot read it. I use the file manager with root privileges to examine the cache folder, and the files are correctly present in my cache folder, but when I try to read them, get a file that is not found. .

This issue is only related to version 4.2 of android. In 4.1- everything works fine

This is the code I use to write the file

public static void writeFile(Bitmap bmp, File f) {

        if (bmp == null)
            return;

        FileOutputStream out = null;

        try {
            out = new FileOutputStream(f);
            boolean res = bmp.compress(Bitmap.CompressFormat.PNG, 80, out);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null)
                    out.close();
            } catch (Exception ex) {
            }
        }
        f.setReadable(true, false);
    }

This is how I create an object file

File bitmapFile = new File(ImageManager.getInstance().getCacheDir(), key);

Here's how to get the cache path

if (Config.USE_INTERNAL_CACHE == false && sdState.equals(android.os.Environment.MEDIA_MOUNTED)) {
        cacheDir = MyApp.getInstance().getExternalCacheDir();
    } else {
        cacheDir = MyApp.getInstance().getCacheDir();

    }
    if (!cacheDir.exists()) {
        cacheDir.mkdirs();
    }

At this point, my file is correctly written in

/data/data/my.app.package/cache/

This is the code I use to read files

public BitmapDrawable readFile(String fileName) {
    FileInputStream in = null;
    try {
        in = new FileInputStream(getCacheDir()+"/"+fileName);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    Bitmap bmp = BitmapFactory.decodeStream(in);

    if (bmp == null) {
        return null;
    }
    return new BitmapDrawable(MyApp.getInstance().getResources(), bmp);
}

This always causes this error:

01-22 11:23:47.158: W/System.err(20660): java.io.FileNotFoundException: /data/data/my.app.package/cache/File Name: open failed: ENOENT (No such file or directory)
01-22 11:23:47.158: W/System.err(20660):    at libcore.io.IoBridge.open(IoBridge.java:416)
01-22 11:23:47.158: W/System.err(20660):    at java.io.FileInputStream.<init(FileInputStream.java:78)
01-22 11:23:47.158: W/System.err(20660):    at java.io.FileInputStream.<init(FileInputStream.java:105)
01-22 11:23:47.158: W/System.err(20660):    atmy.app.package.instanceManager.ImageManager.readFile(ImageManager.java:246)
01-22 11:23:47.158: W/System.err(20660):    atmy.app.package.instanceManager.ImageManager$ImageQueueManager.run(ImageManager.java:186)
01-22 11:23:47.158: W/System.err(20660):    at java.lang.Thread.run(Thread.java:856)
01-22 11:23:47.158: W/System.err(20660): Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
01-22 11:23:47.158: W/System.err(20660):    at libcore.io.Posix.open(Native Method)
01-22 11:23:47.158: W/System.err(20660):    atlibcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
01-22 11:23:47.158: W/System.err(20660):    at libcore.io.IoBridge.open(IoBridge.java:400)
01-22 11:23:47.158: W/System.err(20660):    ... 5 more

Related to this line:

in = new FileInputStream(getCacheDir()+"/"+fileName);

I already added this permission

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

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