@Override
 public void onLowMemory() {
   super.onLowMemory();
   if (LogUtil.DEBUG) {
     LogUtil.e(this, "onLowMemory");
   }
 }
 @Override
 public void onTrimMemory(int level) {
   super.onTrimMemory(level);
   if (LogUtil.DEBUG) {
     LogUtil.e(this, "onTrimMemory" + level);
   }
 }
 @Override
 public void onTerminate() {
   super.onTerminate();
   if (LogUtil.DEBUG) {
     LogUtil.e(this, "onTerminate");
   }
 }