如何从 Uri 获取位图? [英] How to get Bitmap from an Uri?
本文介绍了如何从 Uri 获取位图?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何从 Uri 中获取 Bitmap 对象(如果我成功将其存储在/data/data/MYFOLDER/myimage.png
或 file///data/data/MYFOLDER/myimage.png
) 在我的应用程序中使用它?
How to get a Bitmap object from an Uri (if I succeed to store it in
/data/data/MYFOLDER/myimage.png
or file///data/data/MYFOLDER/myimage.png
) to use it in my application?
有没有人知道如何做到这一点?
Does anyone have an idea on how to accomplish this?
推荐答案
正确的做法如下:
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
Uri imageUri = data.getData();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
}
}
如果你需要加载非常大的图片,下面的代码会分块加载(避免大量内存分配):
If you need to load very large images, the following code will load it in in tiles (avoiding large memory allocations):
BitmapRegionDecoder decoder = BitmapRegionDecoder.newInstance(myStream, false);
Bitmap region = decoder.decodeRegion(new Rect(10, 10, 50, 50), null);
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