你可以触发Android BitmapFactory自动缩放位图,代码如下:
BitmapFactory.Options options = new BitmapFactory.Options();
DisplayMetrics metrics = context.getApplicationContext().getResources().getDisplayMetrics();
options.inScreenDensity = metrics.densityDpi;
options.inTargetDensity = metrics.densityDpi;
options.inDensity = DisplayMetrics.DENSITY_DEFAULT;
Bitmap bm = BitmapFactory.decodeStream(in, null, options);
in.close();
BitmapDrawable bitmapDrawable = new BitmapDrawable(context.getResources(), bm);
inScreenDensity
、inTargetDensity
和 inDensity
。 - Raptor可以像这样执行:
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
Bitmap bitmapOrg = new BitmapDrawable(getResources(), new ByteArrayInputStream(imageThumbnail)).getBitmap();
int width = bitmapOrg.getWidth();
int height = bitmapOrg.getHeight();
float scaleWidth = metrics.scaledDensity;
float scaleHeight = metrics.scaledDensity;
// create a matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// recreate the new Bitmap
Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0, width, height, matrix, true);
或
也许尝试不同的方法...在XML布局中以dips设置图像的高度和宽度,我猜您目前使用的是wrap_content高度和宽度的ImageView,请尝试将高度和宽度设置为48dip。
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int density = metrics.densityDpi
myDrawable.setDensity(densityDpi);
BitmapDrawable.setDensity(71);
吗? - user999717