Android屏幕及view的截图实例详解
屏幕可见区域的截图
整个屏幕截图的话可以用View view = getWindow().getDecorView();
public static Bitmap getNormalViewScreenshot(View view) { view.setDrawingCacheEnabled(true); view.buildDrawingCache(); return view.getDrawingCache(); }
scrollview的整体截屏
public static Bitmap getWholeScrollViewToBitmap(View view) { view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight()); view.buildDrawingCache(); Bitmap bitmap = view.getDrawingCache(); return bitmap; }
webview的整体截图
public static Bitmap getWholeWebViewToBitmap(WebView webView) { Picture snapShot = webView.capturePicture(); Bitmap bmp = Bitmap.createBitmap(snapShot.getWidth(), snapShot.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bmp); snapShot.draw(canvas); return bmp; }
listview的整体截图
public static Bitmap getWholeListViewItemsToBitmap(ListView listview) { ListAdapter adapter = listview.getAdapter(); int itemscount = adapter.getCount(); int allitemsheight = 0; List<Bitmap> bmps = new ArrayList<Bitmap>(); for (int i = 0; i < itemscount; i++) { View childView = adapter.getView(i, null, listview); childView.measure(MeasureSpec.makeMeasureSpec(listview.getWidth(), MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); childView.layout(0, 0, childView.getMeasuredWidth(), childView.getMeasuredHeight()); childView.setDrawingCacheEnabled(true); childView.buildDrawingCache(); bmps.add(childView.getDrawingCache()); allitemsheight += childView.getMeasuredHeight(); } Bitmap bigbitmap = Bitmap.createBitmap(listview.getMeasuredWidth(), allitemsheight, Bitmap.Config.ARGB_8888); Canvas bigcanvas = new Canvas(bigbitmap); Paint paint = new Paint(); int iHeight = 0; for (int i = 0; i < bmps.size(); i++) { Bitmap bmp = bmps.get(i); bigcanvas.drawBitmap(bmp, 0, iHeight, paint); iHeight += bmp.getHeight(); bmp.recycle(); bmp = null; } return bigbitmap; }
需要多次截图的话，需要用到 view.destroyDrawingCache();
Bitmap normalViewScreenshot = ScreenShotUtils.getNormalViewScreenshot(mFrameContent); if (normalViewScreenshot != null) { Bitmap b = Bitmap.createBitmap(normalViewScreenshot); mImageResult.setImageBitmap(b); mFrameContent.destroyDrawingCache(); }
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