Bitmap compress quality ok in emulator, but not in real device - android-studio

Question

In my app, images are saving successfully to gallery after editing. but quality is not up to the mark on physical device. I got 0.5mp to 0.7mp highest. but same app I open in emulator and after saving image I got pretty good quality of images (about 1.5mp to 3mp). didn't find the exact reason of this. will be glad if you help to find out. attaching my image saving code below.
public void saveAsFile(#NonNull final String str, #NonNull final SaveSettings saveSettings, #NonNull final OnSaveListener onSaveListener) {
Log.d(TAG, "Image Path: " + str);
this.parentView.saveFilter((OnSaveBitmap) new OnSaveBitmap() {
#Override
public void onBitmapReady(Bitmap bitmap) {
new AsyncTask<String, String, Exception>() {
#Override
public void onPreExecute() {
super.onPreExecute();
PhotoEditor.this.clearHelperBox();
PhotoEditor.this.parentView.setDrawingCacheEnabled(false);
}
#SuppressLint({"MissingPermission"})
public Exception doInBackground(String... strArr) {
Bitmap bitmap;
try {
FileOutputStream fileOutputStream = new FileOutputStream(new File(str), false);
if (PhotoEditor.this.parentView != null) {
PhotoEditor.this.parentView.setDrawingCacheEnabled(true);
if (saveSettings.isTransparencyEnabled()) {
bitmap = BitmapUtil.removeTransparency(PhotoEditor.this.parentView.getDrawingCache());
} else {
bitmap = PhotoEditor.this.parentView.getDrawingCache();
}
bitmap.compress(Bitmap.CompressFormat.PNG, 100 , fileOutputStream);
}
Log.d(PhotoEditor.TAG, "Filed Saved Successfully");
return null;
} catch (Exception e) {
e.printStackTrace();
Log.d(PhotoEditor.TAG, "Failed to save File");
return e;
}
}
#Override
public void onPostExecute(Exception exc) {
super.onPostExecute(exc);
if (exc == null) {
if (saveSettings.isClearViewsEnabled()) {
PhotoEditor.this.clearAllViews();
}
onSaveListener.onSuccess(str);
return;
}
onSaveListener.onFailure(exc);
}
}.execute();
}
public void onFailure(Exception exc) {
onSaveListener.onFailure(exc);
}
});
}
I tried in many ways but couldn't find the solution.