路徑 frameworks\base\packages\SystemUI\src\com\android\systemui\statusbar\phone\KeyguardStatusBarView.java

前提是在設定中新增電量百分比控制 （有空在寫）

--- a/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarView.java
+++ b/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarView.java
@@ -56
 
,7 +56,7 @@ public class KeyguardStatusBarView extends RelativeLayout
     private View mSystemIconsSuperContainer;
     private MultiUserSwitch mMultiUserSwitch;
     private ImageView mMultiUserAvatar;
-    private TextView mBatteryLevel;
+    public TextView mBatteryLevel;

     private BatteryController mBatteryController;
     private
 
 KeyguardUserSwitcher mKeyguardUserSwitcher;
@@ -109,7 +109,7 @@ public class KeyguardStatusBarView extends RelativeLayout
         } else if (mMultiUserSwitch.getParent() == this && mKeyguardUserSwitcherShowing) {
             removeView(mMultiUserSwitch);
         }
-        mBatteryLevel.setVisibility(mBatteryCharging ? View.VISIBLE : View.GONE);
+       
     }

     private
 
 void updateSystemIconsLayoutParams() {
@@ -166,9 +166,10 @@ public class KeyguardStatusBarView extends RelativeLayout
         mBatteryLevel.setText(percentage);
         boolean changed = mBatteryCharging != charging;
         mBatteryCharging = charging;
-        if (changed) {
-            updateVisibilities();
-        }
+        
+        updateVisibilities();
+               mBatteryLevel.setVisibility(mBatteryCharging|| mBatteryController.mShouldShowBatteryPercentage ? View.VISIBLE : View.GO
+        
     }