Question

我正在尝试使用具有全屏/普通视图的片段来实现照片查看器。请参阅此处的活动API示例： https://android.googlesource.com/platform/development/+/master/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java

但我注意到Android版本上的一个奇怪的错误＆lt;蜂窝。当我在片段中实现OnSystemUiVisibilityChangeListener时，应用程序与NoClassDefFoundError崩溃。在android 4上一切正常。这个错误有解决方法吗？

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    PhotoViewPager viewPager = new PhotoViewPager(getActivity());
    viewPager.setTag("photoViewPager");
    viewPager.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
        @Override
        public void onSystemUiVisibilityChange(int visibility) {
            int diff = mLastSystemUiVis ^ visibility;
            mLastSystemUiVis = visibility;
            if ((diff & View.SYSTEM_UI_FLAG_LOW_PROFILE) != 0
                    && (visibility & View.SYSTEM_UI_FLAG_LOW_PROFILE) == 0) {
                setNavVisibility(true);
            }
        }
    });
    return viewPager;
}

堆栈跟踪

 ERROR/AndroidRuntime(12708): FATAL EXCEPTION: main
 java.lang.NoClassDefFoundError: com.ex.android.main.photos.photo.PhotoFragment$2
 at com.ex.android.main.photos.photo.PhotoFragment.onCreateView(PhotoFragment.java:87)
 at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)

Answer 1

API级别11中引入了

View.OnSystemUiVisibilityChangeListener。

因此，您应该将更改侦听器代码放在兼容包装器中。

在片段内实现OnSystemUiVisibilityChangeListener时的NoClassDefFoundError

1 个答案: