Change Magnification Mode Settings UI

To support new settings UI, we change the UI from scrollview
to listview to simplify UI initialization.

Bug: 182118397
Test: atest MagnificationSettingsFragmentTest
      and manual test.
Change-Id: Ib65dc139ba54f2281e5cb7e2dc55b3574ad2c733

1 files changed, 85 insertions, 0 deletions

diff --git a/src/com/android/settings/accessibility/ItemInfoArrayAdapter.java b/src/com/android/settings/accessibility/ItemInfoArrayAdapter.java
new file mode 100644
index 0000000000..edb16a2a4e
--- /dev/null
+++ b/src/com/android/settings/accessibility/ItemInfoArrayAdapter.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2021 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.settings.accessibility;
+
+import android.content.Context;
+import android.text.TextUtils;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.annotation.DrawableRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.android.settings.R;
+
+import java.util.List;
+
+/**
+ * An {@link ArrayAdapter} to fill the information of {@link ItemInfo} in the item view. The item
+ * view must have textview to set the title.
+ *
+ * @param <T> the type of elements in the array, inherited from {@link ItemInfo}.
+ */
+public class ItemInfoArrayAdapter<T extends ItemInfoArrayAdapter.ItemInfo> extends ArrayAdapter<T> {
+
+    public ItemInfoArrayAdapter(@NonNull Context context, @NonNull List<T> items) {
+        super(context, R.layout.dialog_single_radio_choice_list_item, R.id.title, items);
+    }
+
+    @NonNull
+    @Override
+    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
+        final View root = super.getView(position, convertView, parent);
+
+        final ItemInfo item = getItem(position);
+        final TextView title = root.findViewById(R.id.title);
+        title.setText(item.mTitle);
+        final TextView summary = root.findViewById(R.id.summary);
+        if (!TextUtils.isEmpty(item.mSummary)) {
+            summary.setVisibility(View.VISIBLE);
+            summary.setText(item.mSummary);
+        } else {
+            summary.setVisibility(View.GONE);
+        }
+        final ImageView image = root.findViewById(R.id.image);
+        image.setImageResource(item.mDrawableId);
+        return root;
+    }
+
+    /**
+     * Presents a data structure shown in the item view.
+     */
+    public static class ItemInfo {
+        @NonNull
+        public final CharSequence mTitle;
+        @Nullable
+        public final CharSequence mSummary;
+        @DrawableRes
+        public final int mDrawableId;
+
+        public ItemInfo(@NonNull CharSequence title, @Nullable CharSequence summary,
+                @DrawableRes int drawableId) {
+            mTitle = title;
+            mSummary = summary;
+            mDrawableId = drawableId;
+        }
+    }
+}