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name Punditsdkoslkdosdkoskdo

How to setContentView in a fragment?

Now I've got this fragment which i want to use setContentView with but so far i cant find how. You can see my case in the code below, im not trying to inflate a layout, im trying to use it with the view called SampleView. So how can I do that? Thanks in advance

public class largeImageScroller extends SherlockFragment {

// Physical display width and height.
private static int displayWidth = 0;
private static int displayHeight = 0;

/** Called when the activity is first created. */
public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle saved) {

        // displayWidth and displayHeight will change depending on screen
        // orientation. To get these dynamically, we should hook onSizeChanged().
        // This simple example uses only landscape mode, so it's ok to get them
        // once on startup and use those values throughout.

        Display display = ((WindowManager)
        displayWidth = display.getWidth();             
        displayHeight = display.getHeight();    

        // SampleView constructor must be constructed last as it needs the
        // displayWidth and displayHeight we just got.
        setContentView(new SampleView(this));

private static class SampleView extends View {
        private static Bitmap bmLargeImage; //bitmap large enough to be scrolled
        private static Rect displayRect = null; //rect we display to
        private Rect scrollRect = null; //rect we scroll over our bitmap with
        private int scrollRectX = 0; //current left location of scroll rect
        private int scrollRectY = 0; //current top location of scroll rect
        private float scrollByX = 0; //x amount to scroll by
        private float scrollByY = 0; //y amount to scroll by
        private float startX = 0; //track x from one ACTION_MOVE to the next
        private float startY = 0; //track y from one ACTION_MOVE to the next

        public SampleView(Context context) {

                // Destination rect for our main canvas draw. It never changes.
                displayRect = new Rect(0, 0, displayWidth, displayHeight);
                // Scroll rect: this will be used to 'scroll around' over the
                // bitmap in memory. Initialize as above.
                scrollRect = new Rect(0, 0, displayWidth, displayHeight);

                // Load a large bitmap into an offscreen area of memory.
                bmLargeImage = BitmapFactory.decodeResource(getResources(),

        public boolean onTouchEvent(MotionEvent event) {

                switch (event.getAction()) {
                        case MotionEvent.ACTION_DOWN:
                                // Remember our initial down event location.
                                startX = event.getRawX();
                                startY = event.getRawY();

                        case MotionEvent.ACTION_MOVE:
                                float x = event.getRawX();
                                float y = event.getRawY();
                                // Calculate move update. This will happen many times
                                // during the course of a single movement gesture.
                                scrollByX = x - startX; //move update x increment
                                scrollByY = y - startY; //move update y increment
                                startX = x; //reset initial values to latest
                                startY = y;
                                invalidate(); //force a redraw
                return true; //done with this event so consume it

        protected void onDraw(Canvas canvas) {

                // Our move updates are calculated in ACTION_MOVE in the opposite direction
                // from how we want to move the scroll rect. Think of this as dragging to
                // the left being the same as sliding the scroll rect to the right.
                int newScrollRectX = scrollRectX - (int)scrollByX;
                int newScrollRectY = scrollRectY - (int)scrollByY;

                // Don't scroll off the left or right edges of the bitmap.
                if (newScrollRectX < 0)
                        newScrollRectX = 0;
                else if (newScrollRectX > (bmLargeImage.getWidth() - displayWidth))
                        newScrollRectX = (bmLargeImage.getWidth() - displayWidth);

                // Don't scroll off the top or bottom edges of the bitmap.
                if (newScrollRectY < 0)
                        newScrollRectY = 0;
                else if (newScrollRectY > (bmLargeImage.getHeight() - displayHeight))
                        newScrollRectY = (bmLargeImage.getHeight() - displayHeight);

                // We have our updated scroll rect coordinates, set them and draw.
                scrollRect.set(newScrollRectX, newScrollRectY,
                        newScrollRectX + displayWidth, newScrollRectY + displayHeight);
                Paint paint = new Paint();
                canvas.drawBitmap(bmLargeImage, scrollRect, displayRect, paint);

                // Reset current scroll coordinates to reflect the latest updates,
                // so we can repeat this update process.
                scrollRectX = newScrollRectX;
                scrollRectY = newScrollRectY;

Return the view instance you want to use:

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.ads_tab, container, false);
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Also it's not safe to call getActivity() from onCreateView(). Make sure you call it in or after onActivityCreated(), as at this point your Fragment is fully associated with the Activity. Check Fragment's lifecycle.


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      • 2
    • The documentation does indeed say to watch out and wait for the fragment to be attached. However, I don't see it mentioning this means waiting for the activity to be created (i.e. its onCreate having retuned). The onAttach should IMHO be fine (though I am rather new to Android development) and it's called before onCreateView. Am I missing something?

As explained already, you need to return the view in case of fragments. But still if you want to use it just like setContentView(), you can do so in following way.

1.Put this code snippet wherever you had to put setContentView()

View v = inflater.inflate(R.layout.activity_home, container, false);

2.Now if you want to access something from xml file, you can do so by using

chart = v.findViewById(R.id.chart);

3. And in the end of OnCreateView() you will have to put

return v;

Full example :

  public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.activity_home, container, false);

    chart = v.findViewById(R.id.chart);

    return v;
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