1 files changed, 91 insertions, 0 deletions
diff --git a/WordPress/src/main/java/org/wordpress/android/ui/main/WPMainTabAdapter.java b/WordPress/src/main/java/org/wordpress/android/ui/main/WPMainTabAdapter.java
new file mode 100644
index 000000000..62ce37813
--- /dev/null
+++ b/WordPress/src/main/java/org/wordpress/android/ui/main/WPMainTabAdapter.java
@@ -0,0 +1,91 @@
+package org.wordpress.android.ui.main;
+
+import android.app.Fragment;
+import android.app.FragmentManager;
+import android.os.Parcelable;
+import android.support.v13.app.FragmentStatePagerAdapter;
+import android.util.SparseArray;
+import android.view.ViewGroup;
+
+import org.wordpress.android.ui.notifications.NotificationsListFragment;
+import org.wordpress.android.ui.reader.ReaderPostListFragment;
+
+/**
+ * pager adapter containing tab fragments used by WPMainActivity
+ */
+class WPMainTabAdapter extends FragmentStatePagerAdapter {
+
+    static final int NUM_TABS = 4;
+
+    static final int TAB_MY_SITE = 0;
+    static final int TAB_READER  = 1;
+    static final int TAB_ME      = 2;
+    static final int TAB_NOTIFS  = 3;
+
+    private final SparseArray<Fragment> mFragments = new SparseArray<>(NUM_TABS);
+
+    public WPMainTabAdapter(FragmentManager fm) {
+        super(fm);
+    }
+
+    @Override
+    public void restoreState(Parcelable state, ClassLoader loader) {
+        // work around "Fragement no longer exists for key" Android bug
+        // by catching the IllegalStateException
+        // https://code.google.com/p/android/issues/detail?id=42601
+        try {
+            super.restoreState(state, loader);
+        } catch (IllegalStateException e) {
+            // nop
+        }
+    }
+
+    @Override
+    public int getCount() {
+        return NUM_TABS;
+    }
+
+    public boolean isValidPosition(int position) {
+        return (position >= 0 && position < getCount());
+    }
+
+    @Override
+    public Fragment getItem(int position) {
+        switch (position) {
+            case TAB_MY_SITE:
+                return MySiteFragment.newInstance();
+            case TAB_READER:
+                return ReaderPostListFragment.newInstance();
+            case TAB_ME:
+                return MeFragment.newInstance();
+            case TAB_NOTIFS:
+                return NotificationsListFragment.newInstance();
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    public Object instantiateItem(ViewGroup container, int position) {
+        Object item = super.instantiateItem(container, position);
+        if (item instanceof Fragment) {
+            mFragments.put(position, (Fragment) item);
+        }
+        return item;
+    }
+
+    @Override
+    public void destroyItem(ViewGroup container, int position, Object object) {
+        mFragments.remove(position);
+        super.destroyItem(container, position, object);
+    }
+
+    public Fragment getFragment(int position) {
+        if (isValidPosition(position)) {
+            return mFragments.get(position);
+        } else {
+            return null;
+        }
+    }
+
+}