Adding switch view button to downloads activity

Can now switch between linear and grid layouts in the downloads activity

app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java

@@ -16,6 +16,8 @@ import android.support.v7.widget.GridLayoutManager;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
@@ -144,17 +146,21 @@ public abstract class MissionsFragment extends Fragment {
     }
 
     @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        return super.onOptionsItemSelected(item);
+    public void onPrepareOptionsMenu(Menu menu) {
+        mSwitch = menu.findItem(R.id.switch_mode);
+        super.onPrepareOptionsMenu(menu);
+    }
 
-		/*switch (item.getItemId()) {
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
             case R.id.switch_mode:
 				mLinear = !mLinear;
 				updateList();
 				return true;
 			default:
 				return super.onOptionsItemSelected(item);
-		}*/
+		}
     }
 
     public void notifyChange() {

app/src/main/res/menu/download_menu.xml

@@ -5,4 +5,7 @@
     <item android:id="@+id/action_settings"
         app:showAsAction="never"
         android:title="@string/settings"/>
+    <item android:id="@+id/switch_mode"
+        app:showAsAction="ifRoom"
+        android:title="@string/switch_view"/>
 </menu>

app/src/main/res/values/strings.xml

@@ -517,5 +517,6 @@
     <string name="minimize_on_exit_none_description">None</string>
     <string name="minimize_on_exit_background_description">Minimize to background player</string>
     <string name="minimize_on_exit_popup_description">Minimize to popup player</string>
+    <string name="switch_view">Switch View</string>
 
 </resources>