Develop Reference

Hidden view from screen are not shown in Bitmap while converting layout to Bitmap

I am creating a Bitmap from the ScrollView layout. Some views are not directly visible. They are visible only when I scroll the ScrollView. These views which are not visible to users without scrolling are not shown in the Bitmap also. The views which are shown to the user are only converted to Bitmap. How to convert the complete layout to Bitmap.
ScrollView marksheetLyt = findViewById(R.id.live_test_marksheet_lyt_id);
Bitmap bitmap = Bitmap.createBitmap(marksheetLyt.getWidth(), marksheetLyt.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
marksheetLyt.draw(canvas);
shareMarksheet(bitmap);

how to convert Layout view to Bitmap excluding some components

in my layout I have a background, button and a textView, the button here serves to convert my view to bitmap and save it
I managed to do that but my png Image contains the save button as well,
I'm using this line to get the drawing from my layout :
Bitmap cache = vw.getDrawingCache();
What I want to achieve is that before getting the screen from the view , I want it to not consider my button.
Thanks in advance.

Using canvas to draw layout like this
Bitmap bitmap = Bitmap.createBitmap(layout.getWidth(), layout.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
layout.draw(canvas);

Have you looked at setting the component to visibility gone?
Button saveButton = (Button) findViewById(R.id.save_button);
saveButton.setVisibility(View.GONE);
Then after you get your snapshot make sure you do
saveButton.setVisibility(View.VISIBLE);
The problem with this solution is that the screenshot will still contain the gap where the button was. The view does not get redrawn before the bitmap is saved. I have tried calling invalidate() and requestLayout() with no success (which is why I found your question).
Also, another alternative is to do something like what Anand said by drawing it to a Canvas. This is useful if your view is larger than the screen. By drawing it to a Canvas you can get the entire view. By going this route, you can have a container with your background and TextView and have the button outside that container. You can then get just the view with the container. (I can't use this solution since my button is in the middle of my desired data)
View v = findViewById(R.id.my_view); // the view containing your text view
// not needed since it is outside your my_view now
// v.findViewById(R.id.save_button).setVisibility(View.GONE);
Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.layout(0, 0, v.getLayoutParams().width, v.getLayoutParams().height);
v.draw(c);
// not needed since it is outside your my_view now
// v.findViewById(R.id.save_button).setVisibility(View.VISIBLE);
// your Bitmap "b" now contains the image you want

Android - getDrawingCache - black screen

I've read pretty much every post on this topic, but none of them seem to help.
I'm trying to capture a screen shot of the current screen. For this I'm using getDrawingCache. Here's my code:
mRootView.get().setDrawingCacheEnabled(true);
mRootView.get().buildDrawingCache();
Bitmap screenShot = Bitmap.createBitmap(mRootView.get().getDrawingCache());
mRootView.get().setDrawingCacheEnabled(false);
The resulting bitmap is always black.
mRootView is a weak-reference to the drawer layout, which is my root view.
Here's what I've tried:
Adding a measure and layout call (although this shouldn't be needed since this code runs when a button is pressed, so the view should already be layed out).
Setting the layer type to LAYER_TYPE_NONE before calling setDrawingCacheEnabled(true)
Using a different view as the root view (for example, a ViewPager inside the DrawerLayout).
Nothing seems to work and I've run out of ideas.

You can draw your view to canvas-
pass your main layout reference to this method-
Bitmap file = save(layout);
Bitmap save(View v)
{
Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.draw(c);
return b;
}

If above solution not working so just follow this link might be helpful convert view to bitmap

How to screen shot a ImageView without lost quality

I have two ImageView's in a RelativeLayout, the first one is as large as the RelativeLayout size (as background),and the second ImageView has a small image, now I want to combine these to ImageView's image into one by screenshot. not by combine two bitmap directly.
In the snippet below, I successfully take screenshot of the RelativeLayout, but I found the image quality is not as good as the first ImageView's bitmap, can anyone help me please?
view.setDrawingCacheEnabled(true);
view.setDrawingCacheBackgroundColor(Color.TRANSPARENT);
view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
Bitmap drawCache = view.getDrawingCache(true);

Try to get bitmap using window DecorView :
View window = activity.getWindow().getDecorView()
Canvas bitmapCanvas = new Canvas();
Bitmap bitmap = Bitmap.createBitmap(window.getWidth()*2, window.getHeight()*2, Bitmap.Config.ARGB_8888);
bitmapCanvas.setBitmap(bitmap);
bitmapCanvas.scale(2.0f, 2.0f);
window.draw(bitmapCanvas);
bitmap.compress(Bitmap.CompressFormat.PNG, 0, myOutputStream);
Ref : High resolution screen shot in Android

Bitmap from View not displayed on Android

I am trying to create a bitmap from a View that is not displayed yet to set it as a texture with OpenGL in android.
The problem is that when I create my bitmap the layout parameters of my View have 0 value cause the onLayout() function has not been called yet.
Is there a way to "simulate" a layout or do a "background layout" to get the right layout params ?
I was thinking about a Frame layout having two views, the background one would be used to create my bitmap as the layout would have been done.
Thanks.

You indeed need to layout your View before drawing it into a Bitmap. Simply call
myView.measure(...);
then
myView.layout(0, 0, myView.getMeasuredWidth(), myView.getMeasuredHeight());
I have posted an example on how to do this in one of the following presentations: http://www.curious-creature.org/2010/12/02/android-graphics-animations-and-tips-tricks/

So, some edits after the question was clarified :)
I suggest you create the bitmap independently of the view, then scale it to the same size as the view once the view is created. Create an arbitrary size bitmap that allows you to render what you want to it ..
// This in some class that renders your bitmap independently, and can be
// queried to get the bitmap ...
Bitmap b = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_4444);
// render something to your bitmap here
Then after your view is created, take the precreated bitmap and rescale it to the right size (I've not actually checked this by compiling it -- might be errors):
Rect original = new Rect(0, 0, 100, 100);
RectF destination = new RectF(0.0, 0.0, (float)myView.getWidth(), (float)myView.getHeight());
Canvas canvas = new Canvas();
canvas.drawBitmap(myRenderingClass.b, original, destination, null);
myView.draw(canvas);