将Android.Graphics.Bitmap转换为图像
我正试图获得如下视图的屏幕截图。我得到位图,我需要将其转换为图像添加到PDF生成器将Android.Graphics.Bitmap转换为图像,android,bitmap,xamarin,Android,Bitmap,Xamarin,我正试图获得如下视图的屏幕截图。我得到位图,我需要将其转换为图像添加到PDF生成器 using (var screenshot = Bitmap.CreateBitmap(200, 100,Bitmap.Config.Argb8888)) { var canvas = new Canvas(screenshot); rootView.Draw(canvas); using (var screenshotOutputStream = new FileStream(scre
using (var screenshot = Bitmap.CreateBitmap(200, 100,Bitmap.Config.Argb8888))
{
var canvas = new Canvas(screenshot);
rootView.Draw(canvas);
using (var screenshotOutputStream = new FileStream(screenshotPath,System.IO.FileMode.Create))
{
screenshot.Compress(Android.Graphics.Bitmap.CompressFormat.Png, 90, screenshotOutputStream);
screenshotOutputStream.Flush();
screenshotOutputStream.Close();
}
}
我的问题是如何将Android.Graphics.Bitmap-->屏幕截图
转换为图像
我想用来自位图的图像本身替换url
String imageUrl = "myURL";
Image image = Image.GetInstance (new Uri (imageUrl));
document.Add(image);
您可以使用以下方法:
public Bitmap getScreenshotBmp() {
FileOutputStream fileOutputStream = null;
File path = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
String uniqueID = UUID.randomUUID().toString();
File file = new File(path, uniqueID + ".jpg");
try {
fileOutputStream = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
screenshot.compress(Bitmap.CompressFormat.JPEG, 30, fileOutputStream);
try {
fileOutputStream.flush();
fileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
return screenshot;
}
嗨,Udi,在我看来它仍然是位图?我没有在代码中看到
图像
转换?我遗漏了什么吗?假设这一行这样做:screenshot.compress(Bitmap.CompressFormat.JPEG,30,fileOutputStream);screenshot
来自哪里?屏幕截图类型?问题有“xamarin”标签,为什么是Java?!Xamarin Android不支持System.Drawing.Image。请查看我的三行代码(刚刚添加到我的问题中),它们在Xamarin.Android
中工作。您是否有任何建议获取视图的屏幕截图并将其分配给图像以生成pdf。这是一个Android.Media.Image。抱歉,我误解了您的提问。什么是MemoryStream&Image.FromArray(..)android.media.Image
没有.FromArray()
Bitmap bm = BitmapFactory.DecodeFile (path);
MemoryStream stream = new MemoryStream ();
bm.Compress (Bitmap.CompressFormat.Jpeg, 100, stream);
Image img = Image.FromArray (stream.ToArray());