option to show and hide the header fields

src/main/java/org/ligi/passandroid/ui/PassViewActivity.java

@@ -41,6 +41,20 @@ public class PassViewActivity extends PassViewActivityBase {
         AXT.at(this).startCommonIntent().activityFromClass(FullscreenBarcodeActivity.class);
     }
 
+    @OnClick(R.id.moreTextView)
+    void onMoreClick() {
+        if (back_tv.getVisibility() == View.VISIBLE) {
+            back_tv.setVisibility(View.GONE);
+            moreTextView.setText(R.string.more);
+        } else {
+            back_tv.setVisibility(View.VISIBLE);
+            moreTextView.setText(R.string.less);
+        }
+    }
+
+    @InjectView(R.id.moreTextView)
+    TextView moreTextView;
+
     @InjectView(R.id.barcode_img)
     ImageView barcode_img;
 

src/main/res/layout/pass_view_extra_data.xml

@@ -35,10 +35,28 @@
         android:paddingBottom="10dp" />
 
     <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/more"
+        android:layout_gravity="center"
+        android:padding="10dp"
+        android:textSize="21sp"
+        android:id="@+id/moreTextView"
+        android:fontFamily="sans-serif" />
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:animateLayoutChanges="true"
+        android:layout_height="wrap_content">
+
+        <TextView
         android:id="@+id/back_fields"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+            android:visibility="gone"
+
         android:padding="20dp" />
+    </LinearLayout>
 
     <ImageView
         android:id="@+id/logo_img"

src/main/res/values/strings.xml

@@ -84,5 +84,7 @@ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWIS
     <string name="dialog_delete_confirm_text">Do you really want to delete this passbook?</string>
     <string name="dialog_delete_title">Sure?</string>
     <string name="dialog_delete_confirm_delete_source_checkbox">also delete source?</string>
+    <string name="more">MORE</string>
+    <string name="less">LESS</string>
 
 </resources>