0
的Android SlidingMenu滯後,我遇到了一些問題與jfeinstein10的slidingmenu庫:https://github.com/jfeinstein10/SlidingMenu在第一次使用
我看到的問題是,在第一次使用時,菜單打開時,滯後表現出一些黑色的空間。然後,當我關閉並重新使用它時,一切都很順利,無需申報。
我基本上有一個Activity擴展SlidingFragmentActivity和2個片段。一個用於左側菜單,另一個用於主要內容。
這裏是我是如何實現它,我在調查這個,但我真的不知道我已經錯過了:
public class CavendishSlidingFragmentActivity extends SlidingFragmentActivity {
private final String TAG = CavendishSlidingFragmentActivity.class.getName();
protected FragmentManager fragmentManager;
protected Fragment mContent;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
fragmentManager = getSupportFragmentManager();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
getSlidingMenu().setBehindOffset((int) (metrics.widthPixels * 0.2));
}
public void onClickMenu(View v)
{
if (getSlidingMenu().isMenuShowing())
getSlidingMenu().showContent();
else
getSlidingMenu().showMenu();
}
public void onClickMenuItem(View v)
{
Long position = (Long) v.getTag();
switch (position.intValue())
{
case Utils.CAT_RESTAURANT:
showFragment(new RestaurantFragment());
break;
case Utils.CAT_SLEEP:
showFragment(new SleepFragment());
break;
case Utils.CAT_DISCOVER:
showFragment(new DiscoverFragment());
break;
case Utils.CAT_TRANSPORT:
showFragment(new TransportFragment());
break;
}
}
private void showFragment(Fragment fragment)
{
if (mContent != fragment)
{
mContent = fragment;
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.main_fragment, fragment);
fragmentTransaction.commit();
}
getSlidingMenu().showContent();
}
}
MainActivity.java
public class MainActivity extends CavendishSlidingFragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setBehindContentView(R.layout.fragment_menu);
setContentView(R.layout.fragment_main);
// set the Above View Fragment
if (savedInstanceState != null)
mContent = fragmentManager.getFragment(savedInstanceState, "mContent");
if (mContent == null)
{
mContent = new RestaurantFragment();
}
fragmentManager
.beginTransaction()
.replace(R.id.main_fragment, mContent)
.commit();
}
@Override
public void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
fragmentManager.putFragment(outState, "mContent", mContent);
}
}
我還可以提供代碼,但我認爲這個問題可能在這裏,因爲菜單在初次使用時會自行繪製,導致延遲。我相信在展示之前我必須強制顯示菜單。