我有一个 RecyclerView
,其中有数据和一个适配器来处理所有点击。当从 RecyclerView
中单击某个项目时,我有一个要加载的 fragment 。现在我想要的是当从同一个 Recycler View
中单击某个项目时,将 RecyclerView
替换为 Fragment。
我已经试过了,但它因错误而崩溃
适配器
holder.cvContact.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SingleContactFragment singleContactFragment = SingleContactFragment.newInstance(contact);
FragmentTransaction transaction = ((Activity) context).getFragmentManager().beginTransaction();
transaction.replace(R.id.rv_contact_list, singleContactFragment);
transaction.commit();
}
});
其中 rv_contact_list 是当前的 RecyclerView。
错误是
01-19 20:35:01.892 13088-13088/com.xzii.pkg E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.xzii.pkg, PID: 13088
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$ViewHolder.shouldIgnore()' on a null object reference
at android.support.v7.widget.RecyclerView.findMinMaxChildLayoutPositions(RecyclerView.java:3869)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:3604)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3408)
最佳答案
该错误基本上是提示分配给 RecyclerView 适配器的“上下文数据”。尝试将适配器设置为 null 并将其删除,然后添加新 fragment 。现在只有一个Kotlin示例代码。
val topicListFragment:TopicListFragment = supportFragmentManager.findFragmentById(R.id.topicListFragment) as TopicListFragment
topicListFragment.removeAdaptor()
supportFragmentManager.beginTransaction().remove(topicListFragment).commit()
val topicFragment = TopicFragment()
supportFragmentManager.beginTransaction().add(R.id.homeContent, topicFragment).commit()
清空适配器后,您可能不再需要删除 fragment ,logcat 显示
RecyclerView: No adapter attached; skipping layout
关于android - 如何用 RecyclerView 替换 Fragment,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48346795/