Show bar graphs for internal storage items (Apps, images, video etc.).

BUG=21898434

Change-Id: I8285088c7bef82bbd63fa38d6a95180079acd195

res/layout/storage_item.xml

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 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.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall"
+    android:gravity="center_vertical"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
+    android:paddingTop="16dip"
+    android:paddingBottom="16dip"
+    android:background="?android:attr/selectableItemBackground">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+      <TextView
+          android:id="@+android:id/title"
+          android:layout_width="0dp"
+          android:layout_height="wrap_content"
+          android:layout_weight="1"
+          android:singleLine="true"
+          android:textAppearance="@android:style/TextAppearance.Material.Subhead"
+          android:textAlignment="viewStart"
+          android:ellipsize="marquee"
+          android:fadingEdge="horizontal" />
+
+      <TextView
+          android:id="@android:id/summary"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:textAlignment="viewStart"
+          android:textAppearance="@android:style/TextAppearance.Material.Body1"
+          android:textColor="?android:attr/textColorSecondaryNoDisable"
+          android:maxLines="10" />
+
+    </LinearLayout>
+
+    <ProgressBar
+        android:id="@android:id/progress"
+        android:layout_width="match_parent"
+        android:layout_height="8dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginBottom="8dp"
+        android:visibility="gone"
+        android:max="100"
+        style="?android:attr/progressBarStyleHorizontal" />
+
+</LinearLayout>

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

@@ -430,7 +430,7 @@ public class PrivateVolumeSettings extends SettingsPreferenceFragment {
     }
 
     private void updatePreference(StorageItemPreference pref, long size) {
-        pref.setSummary(Formatter.formatFileSize(getActivity(), size));
+        pref.setStorageSize(size, mVolume.getPath().getTotalSpace());
     }
 
     /**

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

@@ -19,14 +19,22 @@ package com.android.settings.deviceinfo;
 import android.content.Context;
 import android.os.UserHandle;
 import android.preference.Preference;
+import android.text.format.Formatter;
+import android.view.View;
+import android.widget.ProgressBar;
 
 import com.android.settings.R;
 
 public class StorageItemPreference extends Preference {
     public final int userHandle;
 
+    private ProgressBar progressBar;
+    private static final int PROGRESS_MAX = 100;
+    private int progress = -1;
+
     public StorageItemPreference(Context context, int titleRes) {
         this(context, context.getText(titleRes), UserHandle.USER_NULL);
+        setLayoutResource(R.layout.storage_item);
     }
 
     public StorageItemPreference(Context context, CharSequence title, int userHandle) {
@@ -41,4 +49,31 @@ public class StorageItemPreference extends Preference {
     public void setLoading() {
         setSummary(R.string.memory_calculating_size);
     }
+
+    public void setStorageSize(long size, long total) {
+        setSummary(Formatter.formatFileSize(getContext(), size));
+        progress = (int)(size * PROGRESS_MAX / total);
+        updateProgressBar();
+    }
+
+    protected void updateProgressBar() {
+        if (progressBar == null)
+            return;
+
+        if (progress == -1) {
+            progressBar.setVisibility(View.GONE);
+            return;
+        }
+
+        progressBar.setVisibility(View.VISIBLE);
+        progressBar.setMax(PROGRESS_MAX);
+        progressBar.setProgress(progress);
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        progressBar = (ProgressBar) view.findViewById(android.R.id.progress);
+        updateProgressBar();
+        super.onBindView(view);
+    }
 }