Android实现保存长图、长布局效果源码

/**
* view截图，webview和scrollview(scrollview需要传入子view)之类的view能够截取整个长度的bitmap，
* 如果webview内容很多，view.draw(Canvas)方法会很耗时，在子进程中操作会有额外的问题，所以会暂时阻塞
* UI主线程，求方法~
*/
public static Bitmap viewShot(final View view){
if (view == null)
return null;
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
int measureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
view.measure(measureSpec, measureSpec);
if (view.getMeasuredWidth()<=0 || view.getMeasuredHeight()<=0) { L.e(“ImageUtils.viewShot size error”); return null; } Bitmap bm; try { bm = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888); }catch (OutOfMemoryError e){ System.gc(); try { bm = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888); }catch (OutOfMemoryError ee){ L.e(“ImageUtils.viewShot error”, ee); return null; } } Canvas bigCanvas = new Canvas(bm); Paint paint = new Paint(); int iHeight = bm.getHeight(); bigCanvas.drawBitmap(bm, 0, iHeight, paint); view.draw(bigCanvas); return bm; }