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public Bitmap getScreenshotFromRecyclerView(RecyclerView view) { | |
RecyclerView.Adapter adapter = view.getAdapter(); | |
Bitmap bigBitmap = null; | |
if (adapter != null) { | |
int size = adapter.getItemCount(); | |
int height = 0; | |
Paint paint = new Paint(); | |
int iHeight = 0; | |
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024); | |
// Use 1/8th of the available memory for this memory cache. | |
final int cacheSize = maxMemory / 8; | |
LruCache<String, Bitmap> bitmaCache = new LruCache<>(cacheSize); | |
for (int i = 0; i < size; i++) { | |
RecyclerView.ViewHolder holder = adapter.createViewHolder(view, adapter.getItemViewType(i)); | |
adapter.onBindViewHolder(holder, i); | |
holder.itemView.measure(View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY), | |
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)); | |
holder.itemView.layout(0, 0, holder.itemView.getMeasuredWidth(), holder.itemView.getMeasuredHeight()); | |
holder.itemView.setDrawingCacheEnabled(true); | |
holder.itemView.buildDrawingCache(); | |
Bitmap drawingCache = holder.itemView.getDrawingCache(); | |
if (drawingCache != null) { | |
bitmaCache.put(String.valueOf(i), drawingCache); | |
} | |
// holder.itemView.setDrawingCacheEnabled(false); | |
// holder.itemView.destroyDrawingCache(); | |
height += holder.itemView.getMeasuredHeight(); | |
} | |
bigBitmap = Bitmap.createBitmap(view.getMeasuredWidth(), height, Bitmap.Config.ARGB_8888); | |
Canvas bigCanvas = new Canvas(bigBitmap); | |
bigCanvas.drawColor(Color.WHITE); | |
for (int i = 0; i < size; i++) { | |
Bitmap bitmap = bitmaCache.get(String.valueOf(i)); | |
bigCanvas.drawBitmap(bitmap, 0f, iHeight, paint); | |
iHeight += bitmap.getHeight(); | |
bitmap.recycle(); | |
} | |
} | |
return bigBitmap; | |
} |
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