Add summary text for more top level setting tiles

- Connected devices
- App & notifs
- Battery

Bug: 110405144
Test: robotests
Change-Id: Ife44f7c5165483a1bad903ce90a241108ab5da25

src/com/android/settings/deviceinfo/TopLevelStoragePreferenceController.java

@@ -0,0 +1,57 @@
+/*
+ * 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.settings.deviceinfo;
+
+import android.content.Context;
+import android.os.storage.StorageManager;
+import android.text.format.Formatter;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.deviceinfo.PrivateStorageInfo;
+import com.android.settingslib.deviceinfo.StorageManagerVolumeProvider;
+
+import java.text.NumberFormat;
+
+public class TopLevelStoragePreferenceController extends BasePreferenceController {
+
+    private final StorageManager mStorageManager;
+    private final StorageManagerVolumeProvider mStorageManagerVolumeProvider;
+
+    public TopLevelStoragePreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mStorageManager = mContext.getSystemService(StorageManager.class);
+        mStorageManagerVolumeProvider = new StorageManagerVolumeProvider(mStorageManager);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE_UNSEARCHABLE;
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        // TODO: Register listener.
+        final NumberFormat percentageFormat = NumberFormat.getPercentInstance();
+        final PrivateStorageInfo info = PrivateStorageInfo.getPrivateStorageInfo(
+                mStorageManagerVolumeProvider);
+        double privateUsedBytes = info.totalBytes - info.freeBytes;
+        return mContext.getString(R.string.storage_summary,
+                percentageFormat.format(privateUsedBytes / info.totalBytes),
+                Formatter.formatFileSize(mContext, info.freeBytes));
+    }
+}