如何从左右剪切矩形图像(600 x 300),以适应方形
ImageView？我不想调整图像的大小,我只想裁剪它,为300 x 300.
[解]
正如@blackbelt所言
Bitmap cropImg = Bitmap.createBitmap(src,startX,startY,dstWidth,dstHeight);
是伟大的裁剪图像.那么如何自动裁剪不同尺寸的图像.我为此创建了这个简单的代码：
// From drawable
Bitmap src= BitmapFactory.decodeResource(context.getResources(),R.drawable.image);
// From URL
Bitmap src = null;
try {
String URL = "http://www.example.com/image.jpg";
InputStream in = new java.net.URL(URL).openStream();
src = BitmapFactory.decodeStream(in);
} catch (Exception e) {
e.printStackTrace();
}
int width = src.getWidth();
int height = src.getHeight();
int crop = (width - height) / 2;
Bitmap cropImg = Bitmap.createBitmap(src,crop,height,height);
ImageView.setImageBitmap(cropImg);
解决方法
您可以使用
Bitmap dst = Bitmap.createBitmap(src,dstHeight);
从文档：
Returns an immutable bitmap from the specified subset of the source
bitmap. The new bitmap may be the same object as source,or a copy may
have been made. It is initialized with the same density as the
original bitmap.
Here可以找到文档
