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author | daniel oeh <daniel.oeh@gmail.com> | 2012-08-03 13:37:28 +0200 |
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committer | daniel oeh <daniel.oeh@gmail.com> | 2012-08-03 13:37:28 +0200 |
commit | fadb0de18c6beb263324e8771bb54a496f55e9a6 (patch) | |
tree | 9392cfba8ffbfa4f7426efcdf8f53643252e216f /src/de/danoeh/antennapod/util/BitmapDecoder.java | |
parent | fde6a05f1816c278e307bc84356c561b420559e9 (diff) | |
download | AntennaPod-fadb0de18c6beb263324e8771bb54a496f55e9a6.zip |
Moved Bitmap decoding methods into separate class
Diffstat (limited to 'src/de/danoeh/antennapod/util/BitmapDecoder.java')
-rw-r--r-- | src/de/danoeh/antennapod/util/BitmapDecoder.java | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/de/danoeh/antennapod/util/BitmapDecoder.java b/src/de/danoeh/antennapod/util/BitmapDecoder.java new file mode 100644 index 000000000..8cd0bd910 --- /dev/null +++ b/src/de/danoeh/antennapod/util/BitmapDecoder.java @@ -0,0 +1,55 @@ +package de.danoeh.antennapod.util; + +import android.graphics.Bitmap; +import android.graphics.BitmapFactory; +import android.util.Log; + +public class BitmapDecoder { + private static final String TAG = "BitmapDecoder"; + + private static int calculateSampleSize(int preferredLength, int width, int height) { + int max = Math.max(width, height); + if (max < preferredLength) { + return 1; + } else { + // find first sample size where max / sampleSize < + // PREFERRED_LENGTH + for (int sampleSize = 1, power = 0;; power++, sampleSize = (int) Math + .pow(2, power)) { + int newLength = max / sampleSize; + if (newLength <= preferredLength) { + if (newLength > 0) { + return sampleSize; + } else { + return sampleSize - 1; + } + } + } + } + } + + public static Bitmap decodeBitmap(int preferredLength, String fileUrl) { + BitmapFactory.Options options = new BitmapFactory.Options(); + options.inJustDecodeBounds = true; + BitmapFactory.decodeFile(fileUrl, options); + int sampleSize = calculateSampleSize(preferredLength, options.outWidth, + options.outHeight); + + options.inJustDecodeBounds = false; + options.inSampleSize = sampleSize; + Bitmap decodedBitmap = BitmapFactory.decodeFile(fileUrl, + options); + if (decodedBitmap == null) { + Log.i(TAG, + "Bitmap could not be decoded in custom sample size. Trying default sample size (path was " + + fileUrl + ")"); + decodedBitmap = BitmapFactory.decodeFile(fileUrl); + } + if (decodedBitmap != null) { + return Bitmap.createScaledBitmap(decodedBitmap, + preferredLength, preferredLength, false); + } else { + return null; + } + } +} |