在android中创建位图时内存不足
如何缩放此位图图像内存不足异常在android中创建位图时内存不足,android,bitmap,bitmapfactory,Android,Bitmap,Bitmapfactory,如何缩放此位图图像内存不足异常 Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); bitmap.setPixels(pixels, 0, width, 0, 0, width, height); return bitmap; 如何解决此问题? 下面的错误是我得到的 05-07 13:13:30.329:E/dalvikvm堆(17186):内存
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
如何解决此问题?下面的错误是我得到的 05-07 13:13:30.329:E/dalvikvm堆(17186):内存不足 8294416字节分配。05-07 13:13:30.339:E/AndroidRuntime(17186): 致命异常: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):在 android.graphics.Bitmap.nativeCreate(本机方法)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):在 com.example.QRCode.encodeAsBitmap(QRCode.java:135)
将该位图的缩小版本加载到内存中。做一个简短的谷歌调查将引导你做到这一点。 他们有以下示例代码:
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);
}
您可以尝试从位图中使用createScaledBitmap()方法,并且不要使用太大的图像……可能您的位图太大了。或者你可以试试,largeheap可能会有帮助,但是你应该让位图变小。在我的例子中,我不是从可绘制的文件夹生成qrcode