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copied!<p>To replace a fragment inside a <code>ViewPager</code> you can move source codes of <code>ViewPager</code>, <code>PagerAdapter</code> and <code>FragmentStatePagerAdapter</code> classes into your project and add following code.</p> <p>into <code>ViewPager</code>:</p> <pre><code>public void notifyItemChanged(Object oldItem, Object newItem) { if (mItems != null) { for (ItemInfo itemInfo : mItems) { if (itemInfo.object.equals(oldItem)) { itemInfo.object = newItem; } } } invalidate(); } </code></pre> <p>into FragmentStatePagerAdapter:</p> <pre><code>public void replaceFragmetns(ViewPager container, Fragment oldFragment, Fragment newFragment) { startUpdate(container); // remove old fragment if (mCurTransaction == null) { mCurTransaction = mFragmentManager.beginTransaction(); } int position = getFragmentPosition(oldFragment); while (mSavedState.size() <= position) { mSavedState.add(null); } mSavedState.set(position, null); mFragments.set(position, null); mCurTransaction.remove(oldFragment); // add new fragment while (mFragments.size() <= position) { mFragments.add(null); } mFragments.set(position, newFragment); mCurTransaction.add(container.getId(), newFragment); finishUpdate(container); // ensure getItem returns newFragemtn after calling handleGetItemInbalidated() handleGetItemInbalidated(container, oldFragment, newFragment); container.notifyItemChanged(oldFragment, newFragment); } protected abstract void handleGetItemInbalidated(View container, Fragment oldFragment, Fragment newFragment); protected abstract int getFragmentPosition(Fragment fragment); </code></pre> <p><code>handleGetItemInvalidated()</code> ensures that after next call of <code>getItem()</code> it return newFragment <code>getFragmentPosition()</code> returns position of the fragment in your adapter.</p> <p>Now, to replace fragments call </p> <pre><code>mAdapter.replaceFragmetns(mViewPager, oldFragment, newFragment); </code></pre> <p>If you interested in an example project ask me for the sources.</p>

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