CastDetailsView: Create MediaRouteChooserContentManager

Create a content manager to handle the UI logic within the media route
chooser UI. This class is currently being used by
MediaRouteChooserDialog, and will be used by the cast details view in
the future.

This CL follows the refactor mentioned in go/cast-details-view.

Bug: 395947047
Flag: NONE refactor
Test: Cast to a device, click on the Cast tile, launched the dialog and
verified that the chooser UI works.

Change-Id: I61faafa034d0a8b0370d49fbcbc924868f1c6f72

2 files changed, 69 insertions, 24 deletions

diff --git a/core/java/com/android/internal/app/MediaRouteChooserContentManager.java b/core/java/com/android/internal/app/MediaRouteChooserContentManager.java
new file mode 100644
index 000000000000..09c6f5e6caaa
--- /dev/null
+++ b/core/java/com/android/internal/app/MediaRouteChooserContentManager.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2025 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.internal.app;
+
+import android.content.Context;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.ListView;
+
+import com.android.internal.R;
+
+public class MediaRouteChooserContentManager {
+    Context mContext;
+
+    private final boolean mShowProgressBarWhenEmpty;
+
+    public MediaRouteChooserContentManager(Context context, boolean showProgressBarWhenEmpty) {
+        mContext = context;
+        mShowProgressBarWhenEmpty = showProgressBarWhenEmpty;
+    }
+
+    /**
+     * Starts binding all the views (list view, empty view, etc.) using the
+     * given container view.
+     */
+    public void bindViews(View containerView) {
+        View emptyView = containerView.findViewById(android.R.id.empty);
+        ListView listView = containerView.findViewById(R.id.media_route_list);
+        listView.setEmptyView(emptyView);
+
+        if (!mShowProgressBarWhenEmpty) {
+            containerView.findViewById(R.id.media_route_progress_bar).setVisibility(View.GONE);
+
+            // Center the empty view when the progress bar is not shown.
+            LinearLayout.LayoutParams params =
+                    (LinearLayout.LayoutParams) emptyView.getLayoutParams();
+            params.gravity = Gravity.CENTER;
+            emptyView.setLayoutParams(params);
+        }
+    }
+}
diff --git a/core/java/com/android/internal/app/MediaRouteChooserDialog.java b/core/java/com/android/internal/app/MediaRouteChooserDialog.java
index 23d966fdbc0d..5030a143ea94 100644
--- a/core/java/com/android/internal/app/MediaRouteChooserDialog.java
+++ b/core/java/com/android/internal/app/MediaRouteChooserDialog.java
@@ -23,14 +23,12 @@ import android.media.MediaRouter.RouteInfo;
 import android.os.Bundle;
 import android.text.TextUtils;
 import android.util.TypedValue;
-import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
-import android.widget.LinearLayout;
 import android.widget.ListView;
 import android.widget.TextView;
 
@@ -52,15 +50,15 @@ import java.util.Comparator;
 public class MediaRouteChooserDialog extends AlertDialog {
     private final MediaRouter mRouter;
     private final MediaRouterCallback mCallback;
-    private final boolean mShowProgressBarWhenEmpty;
 
     private int mRouteTypes;
     private View.OnClickListener mExtendedSettingsClickListener;
     private RouteAdapter mAdapter;
-    private ListView mListView;
     private Button mExtendedSettingsButton;
     private boolean mAttachedToWindow;
 
+    private final MediaRouteChooserContentManager mContentManager;
+
     public MediaRouteChooserDialog(Context context, int theme) {
         this(context, theme, true);
     }
@@ -70,7 +68,7 @@ public class MediaRouteChooserDialog extends AlertDialog {
 
         mRouter = (MediaRouter) context.getSystemService(Context.MEDIA_ROUTER_SERVICE);
         mCallback = new MediaRouterCallback();
-        mShowProgressBarWhenEmpty = showProgressBarWhenEmpty;
+        mContentManager = new MediaRouteChooserContentManager(context, showProgressBarWhenEmpty);
     }
 
     /**
@@ -128,8 +126,9 @@ public class MediaRouteChooserDialog extends AlertDialog {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // Note: setView must be called before super.onCreate().
-        setView(LayoutInflater.from(getContext()).inflate(R.layout.media_route_chooser_dialog,
-                null));
+        View containerView = LayoutInflater.from(getContext()).inflate(
+                R.layout.media_route_chooser_dialog, null);
+        setView(containerView);
 
         setTitle(mRouteTypes == MediaRouter.ROUTE_TYPE_REMOTE_DISPLAY
                 ? R.string.media_route_chooser_title_for_remote_display
@@ -140,25 +139,15 @@ public class MediaRouteChooserDialog extends AlertDialog {
 
         super.onCreate(savedInstanceState);
 
-        View emptyView = findViewById(android.R.id.empty);
         mAdapter = new RouteAdapter(getContext());
-        mListView = (ListView) findViewById(R.id.media_route_list);
-        mListView.setAdapter(mAdapter);
-        mListView.setOnItemClickListener(mAdapter);
-        mListView.setEmptyView(emptyView);
+        ListView listView = findViewById(R.id.media_route_list);
+        listView.setAdapter(mAdapter);
+        listView.setOnItemClickListener(mAdapter);
 
-        mExtendedSettingsButton = (Button) findViewById(R.id.media_route_extended_settings_button);
+        mExtendedSettingsButton = findViewById(R.id.media_route_extended_settings_button);
         updateExtendedSettingsButton();
 
-        if (!mShowProgressBarWhenEmpty) {
-            findViewById(R.id.media_route_progress_bar).setVisibility(View.GONE);
-
-            // Center the empty view when the progress bar is not shown.
-            LinearLayout.LayoutParams params =
-                    (LinearLayout.LayoutParams) emptyView.getLayoutParams();
-            params.gravity = Gravity.CENTER;
-            emptyView.setLayoutParams(params);
-        }
+        mContentManager.bindViews(containerView);
     }
 
     private void updateExtendedSettingsButton() {
@@ -240,8 +229,8 @@ public class MediaRouteChooserDialog extends AlertDialog {
                 view = mInflater.inflate(R.layout.media_route_list_item, parent, false);
             }
             MediaRouter.RouteInfo route = getItem(position);
-            TextView text1 = (TextView)view.findViewById(android.R.id.text1);
-            TextView text2 = (TextView)view.findViewById(android.R.id.text2);
+            TextView text1 = view.findViewById(android.R.id.text1);
+            TextView text2 = view.findViewById(android.R.id.text2);
             text1.setText(route.getName());
             CharSequence description = route.getDescription();
             if (TextUtils.isEmpty(description)) {