获取电池电量代码

uses   AndroidAPI.JNI.GraphicsContentViewText,   AndroidAPI.JNI.JavaTypes,   AndroidAPI.JNI.OS;   function BatteryPercent(const aContext: JContext): Integer; var   filter: JIntentFilter;   battery: JIntent;   level, scale: Integer; begin   filter := TJIntentFilter.Create;   filter.addAction(TJIntent.JavaClass.ACTION_BATTERY_CHANGED);   battery := aContext.registerReceiver(NIL, filter);   level := battery.getIntExtra(StringToJString('level'), -1);   scale := battery.getIntExtra(StringToJString('scale'), -1);   result := (100 * level) div scale; end;