0
的Android SlidingMenu滞后,我遇到了一些问题与jfeinstein10的slidingmenu库:https://github.com/jfeinstein10/SlidingMenu在第一次使用
我看到的问题是,在第一次使用时,菜单打开时,滞后表现出一些黑色的空间。然后,当我关闭并重新使用它时,一切都很顺利,无需申报。
我基本上有一个Activity扩展SlidingFragmentActivity和2个片段。一个用于左侧菜单,另一个用于主要内容。
这里是我是如何实现它,我在调查这个,但我真的不知道我已经错过了:
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);
}
}
我还可以提供代码,但我认为这个问题可能在这里,因为菜单在初次使用时会自行绘制,导致延迟。我相信在展示之前我必须强制显示菜单。