1 files changed, 125 insertions, 0 deletions
diff --git a/src/com/android/photos/GalleryActivity.java b/src/com/android/photos/GalleryActivity.java
new file mode 100644
index 000000000..46b5140fb
--- /dev/null
+++ b/src/com/android/photos/GalleryActivity.java
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+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.photos;
+
+import android.app.ActionBar;
+import android.app.ActionBar.Tab;
+import android.app.Activity;
+import android.app.Fragment;
+import android.app.FragmentTransaction;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
+
+import com.android.camera.CameraActivity;
+import com.android.gallery3d.R;
+
+public class GalleryActivity extends Activity {
+
+    private final String FTAG_PHOTOSET = "PhotoSet";
+    private final String FTAG_ALBUMSET = "AlbumSet";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setupActionBar();
+    }
+
+    private void setupActionBar() {
+        ActionBar ab = getActionBar();
+        ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
+        ab.setDisplayShowHomeEnabled(false);
+        ab.setDisplayShowTitleEnabled(false);
+        Tab tab = ab.newTab();
+        tab.setText(R.string.tab_photos);
+        tab.setTabListener(new TabListener<PhotoSetFragment>(this,
+                FTAG_PHOTOSET, PhotoSetFragment.class));
+        ab.addTab(tab, true);
+        tab = ab.newTab();
+        tab.setText(R.string.tab_albums);
+        tab.setTabListener(new TabListener<AlbumSetFragment>(this,
+                FTAG_ALBUMSET, AlbumSetFragment.class));
+        ab.addTab(tab);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.gallery, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+        case R.id.menu_camera:
+            Intent intent = new Intent(this, CameraActivity.class);
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            startActivity(intent);
+            return true;
+        default:
+            return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private static class TabListener<T extends Fragment> implements ActionBar.TabListener {
+        private Fragment mFragment;
+        private final Activity mActivity;
+        private final String mTag;
+        private final Class<T> mClass;
+
+        /** Constructor used each time a new tab is created.
+          * @param activity  The host Activity, used to instantiate the fragment
+          * @param tag  The identifier tag for the fragment
+          * @param clz  The fragment's Class, used to instantiate the fragment
+          */
+        public TabListener(Activity activity, String tag, Class<T> clz) {
+            mActivity = activity;
+            mTag = tag;
+            mClass = clz;
+        }
+
+        /* The following are each of the ActionBar.TabListener callbacks */
+
+        @Override
+        public void onTabSelected(Tab tab, FragmentTransaction ft) {
+            // Check if the fragment is already initialized
+            if (mFragment == null) {
+                // If not, instantiate and add it to the activity
+                mFragment = Fragment.instantiate(mActivity, mClass.getName());
+                ft.add(android.R.id.content, mFragment, mTag);
+            } else {
+                // If it exists, simply attach it in order to show it
+                ft.attach(mFragment);
+            }
+        }
+
+        @Override
+        public void onTabUnselected(Tab tab, FragmentTransaction ft) {
+            if (mFragment != null) {
+                // Detach the fragment, because another one is being attached
+                ft.detach(mFragment);
+            }
+        }
+
+        @Override
+        public void onTabReselected(Tab tab, FragmentTransaction ft) {
+            // User selected the already selected tab. Usually do nothing.
+        }
+    }
+}