Add text to the Manage Settings page to show freed storage.

Bug: 29643106
Change-Id: Id05dc70e36a690e27cab67fecf921257ed7baf15

res/values/strings.xml

@@ -7681,4 +7681,7 @@
     <string name="oem_unlock_enable_disabled_summary_connectivity">Connect to the Internet first</string>
     <!-- setting enable OEM unlock Checkbox's summary to explain this Checkbox is disabled because this setting is unavailable on sim-locked devices. [CHAR_LIMIT=60] -->
     <string name="oem_unlock_enable_disabled_summary_sim_locked_device">Unavailable on carrier-locked devices</string>
+
+    <string name="automatic_storage_manager_freed_bytes"><xliff:g id="size" example="3.25MB">%1$s</xliff:g> total made available\n\nLast ran on <xliff:g id="date" example="Jan 12">%2$s</xliff:g></string>
+
 </resources>

res/xml/automatic_storage_management_settings.xml

@@ -27,12 +27,21 @@
             android:title="@string/automatic_storage_manager_preference_title"
             android:summary="@string/automatic_storage_manager_text"/>
 
+
+        <com.android.settings.fuelgauge.WallOfTextPreference
+            android:key="freed_bytes"
+            android:persistent="false"
+            android:selectable="false"
+            settings:allowDividerAbove="false"
+            settings:allowDividerBelow="true" />
+
         <DropDownPreference
             android:key="days"
             android:summary="%s"
             android:title="@string/automatic_storage_manager_days_title"
             android:entries="@array/automatic_storage_management_days"
-            android:entryValues="@array/automatic_storage_management_days_values"/>
+            android:entryValues="@array/automatic_storage_management_days_values"
+            settings:allowDividerAbove="true" />
 
     </PreferenceCategory>
 

src/com/android/settings/deletionhelper/AutomaticStorageManagerSettings.java

@@ -17,12 +17,15 @@
 package com.android.settings.deletionhelper;
 
 import android.app.Activity;
+import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
 import android.os.Bundle;
 import android.os.storage.StorageManager;
 import android.provider.Settings;
+import android.text.format.DateUtils;
+import android.text.format.Formatter;
 import android.util.Log;
 import android.view.View;
 import android.widget.Switch;
@@ -49,9 +52,11 @@ public class AutomaticStorageManagerSettings extends SettingsPreferenceFragment
 
     private static final String KEY_DAYS = "days";
     private static final String KEY_DELETION_HELPER = "deletion_helper";
+    private static final String KEY_FREED = "freed_bytes";
     private static final String KEY_STORAGE_MANAGER_SWITCH = "storage_manager_active";
 
     private DropDownPreference mDaysToRetain;
+    private Preference mFreedBytes;
     private Preference mDeletionHelper;
     private SwitchPreference mStorageManagerSwitch;
 
@@ -67,18 +72,37 @@ public class AutomaticStorageManagerSettings extends SettingsPreferenceFragment
         mDaysToRetain = (DropDownPreference) findPreference(KEY_DAYS);
         mDaysToRetain.setOnPreferenceChangeListener(this);
 
+        mFreedBytes = findPreference(KEY_FREED);
+
         mDeletionHelper = findPreference(KEY_DELETION_HELPER);
         mDeletionHelper.setOnPreferenceClickListener(this);
 
         mStorageManagerSwitch = (SwitchPreference) findPreference(KEY_STORAGE_MANAGER_SWITCH);
         mStorageManagerSwitch.setOnPreferenceChangeListener(this);
 
-        int value = Settings.Secure.getInt(getContentResolver(),
+        ContentResolver cr = getContentResolver();
+        int value = Settings.Secure.getInt(cr,
                 Settings.Secure.AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN,
                 Settings.Secure.AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN_DEFAULT);
         String[] stringValues =
                 getResources().getStringArray(R.array.automatic_storage_management_days_values);
         mDaysToRetain.setValue(stringValues[daysValueToIndex(value, stringValues)]);
+
+        long freedBytes = Settings.Secure.getLong(cr,
+                Settings.Secure.AUTOMATIC_STORAGE_MANAGER_BYTES_CLEARED,
+                0);
+        long lastRunMillis = Settings.Secure.getLong(cr,
+                Settings.Secure.AUTOMATIC_STORAGE_MANAGER_LAST_RUN,
+                0);
+        if (freedBytes == 0 || lastRunMillis == 0) {
+            mFreedBytes.setVisible(false);
+        } else {
+            Activity activity = getActivity();
+            mFreedBytes.setSummary(activity.getString(
+                    R.string.automatic_storage_manager_freed_bytes,
+                    Formatter.formatFileSize(activity, freedBytes),
+                    DateUtils.formatDateTime(activity, lastRunMillis, DateUtils.FORMAT_SHOW_DATE)));
+        }
     }
 
     @Override