1 files changed, 135 insertions, 0 deletions
diff --git a/src/com/android/packageinstaller/permission/ui/handheld/ExpandablePreferenceGroup.java b/src/com/android/packageinstaller/permission/ui/handheld/ExpandablePreferenceGroup.java
new file mode 100644
index 00000000..49a2d5f6
--- /dev/null
+++ b/src/com/android/packageinstaller/permission/ui/handheld/ExpandablePreferenceGroup.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2018 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.packageinstaller.permission.ui.handheld;
+
+import android.content.Context;
+import android.text.TextUtils;
+import android.util.Pair;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.annotation.DrawableRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceViewHolder;
+
+import com.android.permissioncontroller.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A preference group that expands/collapses its children when clicked.
+ */
+public class ExpandablePreferenceGroup extends PreferenceGroup {
+    private @NonNull Context mContext;
+    private @NonNull List<Preference> mPreferences;
+    private @NonNull List<Pair<Integer, CharSequence>> mSummaryIcons;
+    private boolean mExpanded;
+
+    public ExpandablePreferenceGroup(@NonNull Context context) {
+        super(context, null);
+
+        mContext = context;
+        mPreferences = new ArrayList<>();
+        mSummaryIcons = new ArrayList<>();
+        mExpanded = false;
+
+        setLayoutResource(R.layout.preference_usage);
+        setWidgetLayoutResource(R.layout.image_view);
+        setOnPreferenceClickListener(preference -> {
+            if (!mExpanded) {
+                int numPreferences = mPreferences.size();
+                for (int i = 0; i < numPreferences; i++) {
+                    super.addPreference(mPreferences.get(i));
+                }
+            } else {
+                removeAll();
+            }
+            mExpanded = !mExpanded;
+            return true;
+        });
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        ImageView icon = (ImageView) holder.findViewById(android.R.id.icon);
+        int rightIconSize = mContext.getResources().getDimensionPixelSize(
+                R.dimen.secondary_app_icon_size);
+        icon.setMaxWidth(rightIconSize);
+        icon.setMaxHeight(rightIconSize);
+
+        super.onBindViewHolder(holder);
+
+        TextView summary = (TextView) holder.findViewById(android.R.id.summary);
+        summary.setMaxLines(1);
+        summary.setEllipsize(TextUtils.TruncateAt.END);
+
+        ImageView rightImageView = holder.findViewById(
+                android.R.id.widget_frame).findViewById(R.id.icon);
+        if (mExpanded) {
+            rightImageView.setImageResource(R.drawable.ic_arrow_up);
+        } else {
+            rightImageView.setImageResource(R.drawable.ic_arrow_down);
+        }
+
+        holder.setDividerAllowedAbove(false);
+        holder.setDividerAllowedBelow(false);
+
+        holder.findViewById(R.id.title_widget_frame).setVisibility(View.GONE);
+
+        ViewGroup summaryFrame = (ViewGroup) holder.findViewById(R.id.summary_widget_frame);
+        if (mSummaryIcons.isEmpty()) {
+            summaryFrame.setVisibility(View.GONE);
+        } else {
+            summaryFrame.removeAllViews();
+            int numIcons = mSummaryIcons.size();
+            for (int i = 0; i < numIcons; i++) {
+                LayoutInflater inflater = mContext.getSystemService(LayoutInflater.class);
+                ViewGroup group = (ViewGroup) inflater.inflate(R.layout.title_summary_image_view,
+                        null);
+                ImageView imageView = group.requireViewById(R.id.icon);
+                Pair<Integer, CharSequence> summaryIcons = mSummaryIcons.get(i);
+                imageView.setImageResource(summaryIcons.first);
+                if (summaryIcons.second != null) {
+                    imageView.setContentDescription(summaryIcons.second);
+                }
+                summaryFrame.addView(group);
+            }
+        }
+    }
+
+    @Override
+    public boolean addPreference(Preference preference) {
+        mPreferences.add(preference);
+        return true;
+    }
+
+    /**
+     * Show the given icon next to this preference's summary.
+     *
+     * @param resId the resourceId of the drawable to use as the icon.
+     */
+    public void addSummaryIcon(@DrawableRes int resId, @Nullable CharSequence contentDescription) {
+        mSummaryIcons.add(Pair.create(resId, contentDescription));
+    }
+}