Castopod/AntennaPod
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Moved Bitmap decoding methods into separate class

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This commit is contained in:
daniel oeh 2012-08-03 13:37:28 +02:00
parent fde6a05f18
commit fadb0de18c
2 changed files with 58 additions and 19 deletions
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22
src/de/danoeh/antennapod/asynctask/BitmapDecodeWorkerTask.java
View File

@ -11,6 +11,7 @@ import android.widget.ImageView;
import de.danoeh.antennapod.AppConfig;
import de.danoeh.antennapod.PodcastApp;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.util.BitmapDecoder;
public abstract class BitmapDecodeWorkerTask extends
AsyncTask<Void, Void, Void> {
@ -88,25 +89,8 @@ public abstract class BitmapDecodeWorkerTask extends
f = new File(fileUrl);
}
if (fileUrl != null && f.exists()) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(fileUrl, options);
int sampleSize = calculateSampleSize(options.outWidth,
options.outHeight);
options.inJustDecodeBounds = false;
options.inSampleSize = sampleSize;
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) {
bitmap = Bitmap.createScaledBitmap(decodedBitmap,
PREFERRED_LENGTH, PREFERRED_LENGTH, false);
bitmap = BitmapDecoder.decodeBitmap(PREFERRED_LENGTH, fileUrl);
if (bitmap != null) {
storeBitmapInCache(bitmap);
} else {
Log.w(TAG, "Could not load bitmap. Using default image.");

55
src/de/danoeh/antennapod/util/BitmapDecoder.java Normal file
View File

@ -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;
}
}
}