Android屏幕及view的截图实例详解

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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以后我会去到很多很繁华或苍凉，