Settings: Add option to always show battery status on lockscreen (2/2)

Based on the feature by burnsra in CM7

Authored by blunden
Tweaked by dvtonder

Screenshot: https://dl.dropbox.com/u/50993944/Screenshot_2012-08-03-08-47-16.png

Patchset 1  : Initial commit
Patchset 2  : UI redesign
Patchset 3  : Patch description text updated
Patchset 4  : Fix derp in comments

Change-Id: I1c8c8eef3d0c913c621f735e7d5e395c8768fe76

4 files changed, 53 insertions, 1 deletions

diff --git a/res/values/arrays.xml b/res/values/arrays.xml
index 11069a8..f93a01a 100644
--- a/res/values/arrays.xml
+++ b/res/values/arrays.xml
@@ -1189,5 +1189,15 @@
         <item>2</item>
     </string-array>
 
+    <string-array name="lockscreen_battery_status_entries" translatable="false">
+        <item>@string/lockscreen_battery_status_charging</item>
+        <item>@string/lockscreen_battery_status_alwayson</item>
+    </string-array>
+
+    <string-array name="lockscreen_battery_status_values" translatable="false">
+        <item>0</item>
+        <item>1</item>
+    </string-array>
+
     <!-- **** CYANOGENMOD EDITS END **** -->
 </resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index c3e48bc..46b04c9 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -4512,6 +4512,11 @@
     <string name="lockscreen_vibrate_enabled_title">Vibrate</string>
     <string name="lockscreen_vibrate_enabled_head">Vibrate when unlocking</string>
 
+    <!-- Lock screen misc. settings -->
+    <string name="lockscreen_battery_status_title">Battery status</string>
+    <string name="lockscreen_battery_status_charging">Only when charging</string>
+    <string name="lockscreen_battery_status_alwayson">Always on</string>
+
     <!-- Profiles settings  -->
     <string name="profiles_settings_title">Profiles</string>
     <string name="profiles_general_title">General</string>
diff --git a/res/xml/lockscreen_interface_settings.xml b/res/xml/lockscreen_interface_settings.xml
index a4f5365..4138020 100644
--- a/res/xml/lockscreen_interface_settings.xml
+++ b/res/xml/lockscreen_interface_settings.xml
@@ -25,6 +25,15 @@
          <extra android:name="cm_security" android:value="true" />
      </PreferenceScreen>
 
+     <ListPreference
+        android:key="lockscreen_battery_status"
+        android:persistent="false"
+        android:dialogTitle="@string/lockscreen_battery_status_title"
+        android:title="@string/lockscreen_battery_status_title"
+        android:entries="@array/lockscreen_battery_status_entries"
+        android:entryValues="@array/lockscreen_battery_status_values"
+        android:defaultValue="0" />
+
      <Preference
         android:fragment="com.android.settings.cyanogenmod.LockscreenTargets"
         android:key="lockscreen_targets"
diff --git a/src/com/android/settings/cyanogenmod/LockscreenInterface.java b/src/com/android/settings/cyanogenmod/LockscreenInterface.java
index 7df8699..63787c5 100644
--- a/src/com/android/settings/cyanogenmod/LockscreenInterface.java
+++ b/src/com/android/settings/cyanogenmod/LockscreenInterface.java
@@ -16,18 +16,22 @@
 package com.android.settings.cyanogenmod;
 
 import android.os.Bundle;
+import android.preference.ListPreference;
 import android.preference.Preference;
 import android.preference.PreferenceScreen;
+import android.provider.Settings;
 
 import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
 
-public class LockscreenInterface extends SettingsPreferenceFragment {
+public class LockscreenInterface extends SettingsPreferenceFragment implements Preference.OnPreferenceChangeListener {
     private static final String TAG = "LockscreenInterface";
 
+    private static final String KEY_ALWAYS_BATTERY_PREF = "lockscreen_battery_status";
     private static final String KEY_LOCKSCREEN_BUTTONS = "lockscreen_buttons";
 
     private PreferenceScreen mLockscreenButtons;
+    private ListPreference mBatteryStatus;
 
     public boolean hasButtons() {
         return !getResources().getBoolean(com.android.internal.R.bool.config_showNavigationBar);
@@ -39,6 +43,9 @@ public class LockscreenInterface extends SettingsPreferenceFragment {
 
         addPreferencesFromResource(R.xml.lockscreen_interface_settings);
 
+        mBatteryStatus = (ListPreference) findPreference(KEY_ALWAYS_BATTERY_PREF);
+        mBatteryStatus.setOnPreferenceChangeListener(this);
+
         mLockscreenButtons = (PreferenceScreen) findPreference(KEY_LOCKSCREEN_BUTTONS);
         if (!hasButtons()) {
             getPreferenceScreen().removePreference(mLockscreenButtons);
@@ -53,10 +60,31 @@ public class LockscreenInterface extends SettingsPreferenceFragment {
     @Override
     public void onPause() {
         super.onPause();
+
+        // Set the battery status description text
+        if (mBatteryStatus != null) {
+            int batteryStatus = Settings.System.getInt(getActivity().getApplicationContext().getContentResolver(),
+                    Settings.System.LOCKSCREEN_ALWAYS_SHOW_BATTERY, 0);
+            mBatteryStatus.setValueIndex(batteryStatus);
+            mBatteryStatus.setSummary(mBatteryStatus.getEntries()[batteryStatus]);
+        }
     }
 
     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
         return super.onPreferenceTreeClick(preferenceScreen, preference);
     }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object objValue) {
+        if (preference == mBatteryStatus) {
+            int value = Integer.valueOf((String) objValue);
+            int index = mBatteryStatus.findIndexOfValue((String) objValue);
+            Settings.System.putInt(getActivity().getApplicationContext().getContentResolver(),
+                    Settings.System.LOCKSCREEN_ALWAYS_SHOW_BATTERY, value);
+            mBatteryStatus.setSummary(mBatteryStatus.getEntries()[index]);
+            return true;
+        }
+        return false;
+    }
 }