Refine MediaSaveService to use memory limit.

 * Service for saving images in the background thread.

 */

public class MediaSaveService extends Service {

    private static final int SAVE_TASK_LIMIT = 3;

    private static final String TAG = MediaSaveService.class.getSimpleName();

    // The memory limit for unsaved image is 20MB.

    private static final int SAVE_TASK_MEMORY_LIMIT = 20 * 1024 * 1024;

    private static final String TAG = "CAM_" + MediaSaveService.class.getSimpleName();

    private final IBinder mBinder = new LocalBinder();

    private int mTaskNumber;

    private Listener mListener;

    // Memory used by the total queued save request, in bytes.

    private long mMemoryUse;

    interface Listener {

        public void onQueueStatus(boolean full);

    }

    @Override

    public void onCreate() {

        mTaskNumber = 0;

        mMemoryUse = 0;

    }

    public boolean isQueueFull() {

        return (mTaskNumber >= SAVE_TASK_LIMIT);

        return (mMemoryUse >= SAVE_TASK_MEMORY_LIMIT);

    }

    // Runs in main thread

    public void addImage(final byte[] data, String title, long date, Location loc,

            int width, int height, int orientation, ExifInterface exif,

            OnMediaSavedListener l, ContentResolver resolver) {

                (loc == null) ? null : new Location(loc),

                width, height, orientation, exif, resolver, l);

        mTaskNumber++;

        mMemoryUse += data.length;

        if (isQueueFull()) {

            onQueueFull();

        }

        t.execute();

    }

    public void addImage(final byte[] data, String title, Location loc,

            int width, int height, int orientation, ExifInterface exif,

            OnMediaSavedListener l, ContentResolver resolver) {

        addImage(data, title, System.currentTimeMillis(), loc, width, height,

                orientation, exif, l, resolver);

    }

    public void addVideo(String path, long duration, ContentValues values,

            OnMediaSavedListener l, ContentResolver resolver) {

        // We don't set a queue limit for video saving because the file

        @Override

        protected void onPostExecute(Uri uri) {

            if (listener != null) listener.onMediaSaved(uri);

            mTaskNumber--;

            if (mTaskNumber == SAVE_TASK_LIMIT - 1) onQueueAvailable();

            boolean previouslyFull = isQueueFull();

            mMemoryUse -= data.length;

            if (isQueueFull() != previouslyFull) onQueueAvailable();

        }

    }