问题描述
Sharechat应用示例,如何实现它[1]:https://i.stack.imgur.com/iUcev.jpg 通过使用此方法,我只能获取图像元素并转换为图像,而不能获取框架布局,这必须在后台完成而又不会膨胀到主视图。
public static Bitmap createBitmapSafely(int width,int height,Bitmap.Config config,int retryCount) {
//width and height must be > 0
if (width <= 0 || height <= 0) {
return null;
}
try {
return Bitmap.createBitmap(width,height,config);
} catch (OutOfMemoryError e) {
e.printstacktrace();
if (retryCount > 0) {
System.gc();
return createBitmapSafely(width,config,retryCount - 1);
}
return null;
}
}
public static Bitmap createBitmapFromView(View view,float scale) {
if (view instanceof ImageView) {
Drawable drawable = ((ImageView) view).getDrawable();
if (drawable != null && drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
}
}
view.clearFocus();
int viewHeight = 0;
if (view instanceof ScrollView) {
for (int i = 0; i < ((ScrollView) view).getChildCount(); i++) {
viewHeight += ((ScrollView) view).getChildAt(i).getHeight();
}
} else if (view instanceof nestedScrollView) {
for (int i = 0; i < ((nestedScrollView) view).getChildCount(); i++) {
viewHeight += ((nestedScrollView) view).getChildAt(i).getHeight();
}
} else {
viewHeight = view.getHeight();
}
Bitmap bitmap = createBitmapSafely((int) (view.getWidth() * scale),(int) (viewHeight * scale),Bitmap.Config.ARGB_8888,1);
if (bitmap != null) {
synchronized (CANVAS) {
Canvas canvas = CANVAS;
canvas.setBitmap(bitmap);
canvas.save();
// 防止 View 上面有些区域空白导致最终 Bitmap 上有些区域变黑
canvas.drawColor(Color.WHITE);
canvas.scale(scale,scale);
view.draw(canvas);
canvas.restore();
canvas.setBitmap(null);
}
}
return bitmap;
}
解决方法
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