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Prevent OOM on scanning large images for barcode

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Sylvia van Os
2021-09-14 19:50:50 +02:00
parent 6b1bdbaa78
commit a37e99ce39
2 changed files with 16 additions and 0 deletions
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15
app/src/main/java/protect/card_locker/Utils.java
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@@ -146,6 +146,21 @@ public class Utils {
}
static public BarcodeValues getBarcodeFromBitmap(Bitmap bitmap) {
// This function is vulnerable to OOM, so we try again with a smaller bitmap is we get OOM
for (int i = 0; i < 10; i++) {
try {
return Utils.getBarcodeFromBitmapReal(bitmap);
} catch (OutOfMemoryError e) {
Log.w(TAG, "Ran OOM in getBarcodeFromBitmap! Trying again with smaller picture! Retry " + i + " of 10.");
bitmap = Bitmap.createScaledBitmap(bitmap, (int) Math.round(0.75 * bitmap.getWidth()), (int) Math.round(0.75 * bitmap.getHeight()), false);
}
}
// Give up
return new BarcodeValues(null, null);
}
static private BarcodeValues getBarcodeFromBitmapReal(Bitmap bitmap) {
// In order to decode it, the Bitmap must first be converted into a pixel array...
int[] intArray = new int[bitmap.getWidth() * bitmap.getHeight()];
bitmap.getPixels(intArray, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());