How to scale this bitmap image am getting out of memory exception
如何缩放此位图图像会导致内存不足异常
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
How to resolve this ?
The below error is am getting
怎么解决这个?以下错误即将发生
05-07 13:13:30.329: E/dalvikvm-heap(17186): Out of memory on a 8294416-byte allocation. 05-07 13:13:30.339: E/AndroidRuntime(17186): FATAL EXCEPTION: main 05-07 13:13:30.339: E/AndroidRuntime(17186): Process: com.example, PID: 17186 05-07 13:13:30.339: E/AndroidRuntime(17186): java.lang.OutOfMemoryError 05-07 13:13:30.339: E/AndroidRuntime(17186): at android.graphics.Bitmap.nativeCreate(Native Method) 05-07 13:13:30.339: E/AndroidRuntime(17186): at android.graphics.Bitmap.createBitmap(Bitmap.java:819) 05-07 13:13:30.339: E/AndroidRuntime(17186): at android.graphics.Bitmap.createBitmap(Bitmap.java:796) 05-07 13:13:30.339: E/AndroidRuntime(17186): at android.graphics.Bitmap.createBitmap(Bitmap.java:763) 05-07 13:13:30.339: E/AndroidRuntime(17186): at com.example.QRCode.encodeAsBitmap(QRCode.java:135)
05-07 13:13:30.329:E / dalvikvm-heap(17186):8294416字节分配的内存不足。 05-07 13:13:30.339:E / AndroidRuntime(17186):FATAL EXCEPTION:main 05-07 13:13:30.339:E / AndroidRuntime(17186):进程:com.example,PID:17186 05-07 13: 13:30.339:E / AndroidRuntime(17186):java.lang.OutOfMemoryError 05-07 13:13:30.339:E / AndroidRuntime(17186):at android.graphics.Bitmap.nativeCreate(Native Method)05-07 13:13 :30.339:E / AndroidRuntime(17186):在android.graphics.Bitmap.createBitmap(Bitmap.java:819)05-07 13:13:30.339:E / AndroidRuntime(17186):在android.graphics.Bitmap.createBitmap( Bitmap.java:796)05-07 13:13:30.339:E / AndroidRuntime(17186):在android.graphics.Bitmap.createBitmap(Bitmap.java:763)05-07 13:13:30.339:E / AndroidRuntime( 17186):at com.example.QRCode.encodeAsBitmap(QRCode.java:135)
1 个解决方案
#1
Load a scaled down version of that Bitmap into your memory. Doing a short Google research will guide you to this Loading Large Bitmaps Efficently. There they have this sample code:
将该位图的缩小版本加载到内存中。做一个简短的谷歌研究将指导您如此加载大型位图。他们有这个示例代码:
public static int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId,
int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(res, resId, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(res, resId, options);
}
#1
Load a scaled down version of that Bitmap into your memory. Doing a short Google research will guide you to this Loading Large Bitmaps Efficently. There they have this sample code:
将该位图的缩小版本加载到内存中。做一个简短的谷歌研究将指导您如此加载大型位图。他们有这个示例代码:
public static int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId,
int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(res, resId, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(res, resId, options);
}