sdm660-common: XiaomiParts: Add a preview image to kcal

XiaomiParts/res/layout/activity_kcal.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <ImageView
+        android:id="@+id/preview"
+        android:layout_width="match_parent"
+        android:layout_height="160dp"
+        android:scaleType="centerCrop"
+        android:src="@drawable/preview" />
+
+    <LinearLayout
+        android:id="@+id/fragment_kcal"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+</LinearLayout>

XiaomiParts/src/org/lineageos/settings/device/kcal/KCalSettingsActivity.java

@@ -32,12 +32,13 @@ public class KCalSettingsActivity extends Activity implements Utils {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_kcal);
 
-        Fragment fragment = getFragmentManager().findFragmentById(android.R.id.content);
+        Fragment fragment = getFragmentManager().findFragmentById(R.id.fragment_kcal);
         if (fragment == null) {
             mKCalSettingsFragment = new KCalSettings();
             getFragmentManager().beginTransaction()
-                    .add(android.R.id.content, mKCalSettingsFragment)
+                    .add(R.id.fragment_kcal, mKCalSettingsFragment)
                     .commit();
         } else {
             mKCalSettingsFragment = (KCalSettings) fragment;