在 Android 上将视图转换为位图 [英] Convert view to bitmap on Android
本文介绍了在 Android 上将视图转换为位图的处理方法,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
我需要将视图转换为位图以预览我的视图并将其另存为图像.我尝试使用以下代码,但它创建了一个空白图像.我不明白我哪里出错了.
I need to convert a view to a bitmap to preview my view and to save it as an image. I tried using the following code, but it creates a blank image. I cannot understand where I made a mistake.
View viewToBeConverted; Bitmap viewBitmap = Bitmap.createBitmap(viewToBeConverted.getWidth(), viewToBeConverted.getHeight(),Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(viewBitmap);
viewToBeConverted.draw(canvas);
savephoto("f1", viewBitmap);
//// public void savephoto(String filename,Bitmap bit)
{
File newFile = new File(Environment.getExternalStorageDirectory() + Picture_Card/"+ filename+ ".PNG");
try
{
newFile.createNewFile();
try
{
FileOutputStream pdfFile = new FileOutputStream(newFile); Bitmap bm = bit; ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG,100, baos); byte[] bytes = baos.toByteArray();
pdfFile.write(bytes);
pdfFile.close();
}
catch (FileNotFoundException e)
{ //
}
} catch (IOException e)
{ //
}
}
推荐答案
这是我的解决方案:
public static Bitmap getBitmapFromView(View view) {
//Define a bitmap with the same size as the view
Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),Bitmap.Config.ARGB_8888);
//Bind a canvas to it
Canvas canvas = new Canvas(returnedBitmap);
//Get the view's background
Drawable bgDrawable =view.getBackground();
if (bgDrawable!=null)
//has background drawable, then draw it on the canvas
bgDrawable.draw(canvas);
else
//does not have background drawable, then draw white background on the canvas
canvas.drawColor(Color.WHITE);
// draw the view on the canvas
view.draw(canvas);
//return the bitmap
return returnedBitmap;
}
享受:)
这篇关于在 Android 上将视图转换为位图的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文