参考：https://blog.csdn.net/qq_19973845/article/details/103404158
参考：https://www.cnblogs.com/lsgxeva/p/13394660.html
public class BitmapFromView {
/**
* 从 View 中获取 Bitmap
*
* @param activity Build.VERSION.SDK_INT >= Build.VERSION_CODES.O 会使用 activity获取 window
* @param view 将要被截图的View
* @return view的截图
*/
public static Bitmap getBitmapFromView(Activity activity, View view) {
if (activity == null || view == null) return null;
Bitmap b;
//请求转换
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
//获取layout的位置
final int[] location = new int[2];
view.getLocationInWindow(location);
//准备一个bitmap对象，用来将copy出来的区域绘制到此对象中
b = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888, true);
PixelCopy.request(activity.getWindow(),
new Rect(location[0], location[1], location[0] + view.getWidth(), location[1] + view.getHeight()),
b, copyResult ->{
//如果成功
if (copyResult == PixelCopy.SUCCESS) {
//这里做的回调,其实这个过程可以作为同步代码处理
//image.setImageBitmap(bitmap);
}
}, new Handler(Looper.getMainLooper()));
} else {
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
view.measure(View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
View.MeasureSpec.makeMeasureSpec(view.getHeight(), View.MeasureSpec.EXACTLY));
view.layout((int) view.getX(), (int) view.getY(),
(int) view.getX() + view.getMeasuredWidth(), (int) view.getY() + view.getMeasuredWidth());
} else {
view.measure(
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
);
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
}
b = Bitmap.createBitmap(view.getDrawingCache(),
0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
view.setDrawingCacheEnabled(false);
view.destroyDrawingCache();
}
if(b == null){
b = drawableToBitmap(activity.getDrawable(R.drawable.bg_start));
}
return b;
}
/*
* Drawable转化为Bitmap
*/
public static Bitmap drawableToBitmap(Drawable drawable) {
int width = drawable.getIntrinsicWidth();
int height = drawable.getIntrinsicHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height,
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0,0,width,height);
drawable.draw(canvas);
return bitmap;
}
}
