refactor MainActivity into ui package

Author: Palatis

app/build.gradle

@@ -7,6 +7,9 @@ if (file('signing.gradle').exists()) {
 }
 
 android {
+    dataBinding {
+        enabled true
+    }
     compileSdkVersion 31
     buildToolsVersion "30.0.2"
 

app/src/main/AndroidManifest.xml

@@ -15,7 +15,7 @@
 
         <activity
             android:exported="true"
-            android:name=".MainActivity"
+            android:name=".ui.MainActivity"
             android:label="@string/title_activity_main"
             android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">
             <intent-filter>

…/idv/palatis/xappdebug/MainActivity.java …v/palatis/xappdebug/ui/MainActivity.javaapp/src/main/java/tw/idv/palatis/xappdebug/MainActivity.java renamed to app/src/main/java/tw/idv/palatis/xappdebug/ui/MainActivity.java app/src/main/java/tw/idv/palatis/xappdebug/MainActivity.java renamed to app/src/main/java/tw/idv/palatis/xappdebug/ui/MainActivity.java

@@ -1,17 +1,20 @@
-package tw.idv.palatis.xappdebug;
+package tw.idv.palatis.xappdebug.ui;
 
 import android.os.Bundle;
 
-import com.google.android.material.navigation.NavigationView;
-
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
+import androidx.navigation.fragment.NavHostFragment;
 import androidx.navigation.ui.AppBarConfiguration;
 import androidx.navigation.ui.NavigationUI;
 
+import com.google.android.material.navigation.NavigationView;
+
+import tw.idv.palatis.xappdebug.R;
+
 public class MainActivity extends AppCompatActivity {
 
     private AppBarConfiguration mAppBarConfiguration;
@@ -31,7 +34,8 @@ protected void onCreate(Bundle savedInstanceState) {
         mAppBarConfiguration = new AppBarConfiguration.Builder(R.id.nav_apps, R.id.nav_about)
                 .setDrawerLayout(drawer)
                 .build();
-        final NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
+        final NavHostFragment navFragment = (NavHostFragment) getSupportFragmentManager().findFragmentById(R.id.nav_host_fragment);
+        final NavController navController = navFragment.getNavController();
         NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
         NavigationUI.setupWithNavController(navigationView, navController);
     }
@@ -41,4 +45,5 @@ public boolean onSupportNavigateUp() {
         final NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
         return NavigationUI.navigateUp(navController, mAppBarConfiguration) || super.onSupportNavigateUp();
     }
+
 }

app/src/main/res/layout/app_bar_main.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".MainActivity">
+    tools:context=".ui.MainActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/content_main.xml

@@ -7,7 +7,7 @@
     app:layout_behavior="@string/appbar_scrolling_view_behavior"
     tools:showIn="@layout/app_bar_main">
 
-    <fragment
+    <androidx.fragment.app.FragmentContainerView
         android:id="@+id/nav_host_fragment"
         android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="match_parent"
@@ -16,6 +16,7 @@
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
         app:navGraph="@navigation/mobile_navigation" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>