blocks|key|4492283|text|您可以在创建viewholder时传递FragmentManager引用，因此Viewholder的类可以如下所示|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4492284|class+ListItemViewHolder+{
FragmentManager+manager;
public+ListItemViewHolder(View+itemView,FragmentManager+manager)+{
++++++++super(itemView);
++++++++title+=+(TextView)+itemView.findViewById(R.id.title);
++++++++description+=+(TextView)+itemView.findViewById(R.id.description);
++++++++itemView.setOnClickListener(this);
++++++++this.manager+=+manager;
++++}

++++@Override
++++public+void+onClick(View+v)+{
++++++++//Call+FragmentManager+and+add+Fragment+to+it.
++++++++manager.beginTransaction...
++++++++}
++++}|code-block|syntax|javascript|4492285|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You could pass FragmentManager reference while creating viewholder so your class for Viewholder could be as follows

<pre><code>class ListItemViewHolder {
FragmentManager manager;
public ListItemViewHolder(View itemView,FragmentManager manager) {
 super(itemView);
 title = (TextView) itemView.findViewById(R.id.title);
 description = (TextView) itemView.findViewById(R.id.description);
 itemView.setOnClickListener(this);
 this.manager = manager;
 }

 @Override
 public void onClick(View v) {
 //Call FragmentManager and add Fragment to it.
 manager.beginTransaction...
 }
 }
</code></pre>

blocks|key|4493390|text|您只需要在构造函数中传递一个活动上下文。确保从活动调用new+Adapter(this,...)，从片段调用new+Adapter(getActivity(),...)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4493391|private+Context+context;

@Override
public+void+onClick(View+v)+{
++++FragmentManager+manager+=+((AppCompatActivity)context).getSupportFragmentManager();
}|code-block|syntax|javascript|4493392|entityMap^0|R|L|1I|U|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

You just need an activity context passed in your constructor. Be sure to call <code>new Adapter(this,...)</code> from activities and <code>new Adapter(getActivity(),...)</code> from fragments.

<pre><code>private Context context;

@Override
public void onClick(View v) {
 FragmentManager manager = ((AppCompatActivity)context).getSupportFragmentManager();
}
</code></pre>

blocks|key|4492404|text|最好的选择可能是拥有实例化RecyclerAdapter的片段来实现和接口，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4492405|public+class+MyRecyclerAdapter+extends+Adapter<RecyclerAdapter.ViewHolder>+{

+++++private+ItemType[]+mItems;
+++++private+MRAItemClickedListener+mListener;

+++++public+MyRecyclerAdapter(Context+ctx,+MRAItemClickedListener+listener){

++++++++mListener+=+listener;
++++++++...
+++++}

+++++@Override
+++++public+void+onBindViewHolder(ViewHolder+holder,+int+position)+{
+++++++++holder.itemView.setOnClickListener(new+OnClickListener(){
+++++++++++++@Override
+++++++++++++public+void+onClick(View+v)+{
++++++++++++++++++mListener.onItemClicked(mItems[position]);
+++++++++++++}
+++++++++});
+++++}

+++++interface+MRAItemClickedListener+{
+++++++++void+onItemClicked(ItemType+item);
+++++}

}

public+class+MyFragment+...+implements+MRAItemClickedListener+{

++++public+void+onItemClicked(ItemType+item){
++++++++++//+do+stuff+with+item
++++}

}|code-block|syntax|javascript|4492406|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Best option would probably be to have the Fragment that instantiates the RecyclerAdapter to implement and interface like this:

<pre><code>public class MyRecyclerAdapter extends Adapter&lt;RecyclerAdapter.ViewHolder&gt; {

 private ItemType[] mItems;
 private MRAItemClickedListener mListener;

 public MyRecyclerAdapter(Context ctx, MRAItemClickedListener listener){

 mListener = listener;
 ...
 }

 @Override
 public void onBindViewHolder(ViewHolder holder, int position) {
 holder.itemView.setOnClickListener(new OnClickListener(){
 @Override
 public void onClick(View v) {
 mListener.onItemClicked(mItems[position]);
 }
 });
 }

 interface MRAItemClickedListener {
 void onItemClicked(ItemType item);
 }

}

public class MyFragment ... implements MRAItemClickedListener {

 public void onItemClicked(ItemType item){
 // do stuff with item
 }

}
</code></pre>

blocks|key|4492477|text|我知道这对你来说太晚了，但对任何可能看到这个的人来说都太晚了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4492478|因此，您可以在第一次初始化适配器时传递片段的上下文，而不是执行m+vai。|4492479|因此，您可以在适配器的构造函数中添加如下参数|4492480|+//+variable+to+hold+fragment
+private+Fragment+fragment;

+public+MyCustomAdapter(Fragment+fragment)
+{
++++this.fragment+=+fragment;
+}|code-block|syntax|javascript|4492481|在你的片段中，你可以像这样初始化|4492482|+MyCustomAdapter+myAdapter+=+new+MyCustomAdapter(this);|4492483|最后，您可以调用|4492484|Fragment+fragment+=+new+myNewFragment();
FragmentManager+fragmentManager+=+context.getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.fragment_container,+fragment)
.commit();|4492485|这样你就可以开始一个新的片段|4492486|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$]]|$1|Q|3|R|5|H|7|13|8|@]|9|@]|A|$I|J]]|$1|S|3|T|5|6|7|14|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

I know this is too late for you but to anyone else who might see this.

So instead of doing m vai did you can pass the context of the fragment when you first initialize your adapter.

So in your constructor for your adapter you can add an argument like this

<pre><code> // variable to hold fragment
 private Fragment fragment;

 public MyCustomAdapter(Fragment fragment)
 {
 this.fragment = fragment;
 }
</code></pre>

and in your fragment you can just initialize if like this

<pre><code> MyCustomAdapter myAdapter = new MyCustomAdapter(this);
</code></pre>

finally you can call

<pre><code>Fragment fragment = new myNewFragment();
FragmentManager fragmentManager = context.getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.fragment_container, fragment)
.commit();
</code></pre>

so you can start a new fragment

blocks|key|4492516|text|您只需要在构造函数中传递一个活动上下文。一定要从活动中调用新的Adapter(this,...)，从片段中调用new+Adapter(getActivity(),...)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4492517|private+Context+context;+@Override+public+void+onClick(View+v)+{+++++FragmentManager+manager+=+((Activity)+context).getFragmentManager();}|4492518|entityMap^0|V|H|1J|U|0|0|3U|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

You just need an activity context passed in your constructor. Be sure to call new <code>Adapter(this,...)</code> from activities and <code>new Adapter(getActivity(),...)</code> from fragments.

<code>private Context context;
@Override
public void onClick(View v) {
 FragmentManager manager = ((Activity) context).getFragmentManager();}</code>

blocks|key|4492535|text|在kotlin中，您可以使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4492536|++++val+fm+:+FragmentManager=+(context+as+AppCompatActivity).supportFragmentManager|code-block|syntax|javascript|4492537|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

in kotlin you can use this code:

<pre><code> val fm : FragmentManager= (context as AppCompatActivity).supportFragmentManager
</code></pre>

I am converting ListView of my app to RecyclerView. On ListView, it was very easy to implement OnClickListener but in RecyclerView, we have to do it in adapter. I want to open a new Fragment when user clicks on a item. To do this I have to call FragmentManager in adapter which I am not able to do.
This is my code of RecyclerAdapter:

<pre><code>public ListItemViewHolder(View itemView) {
 super(itemView);
 title = (TextView) itemView.findViewById(R.id.title);
 description = (TextView) itemView.findViewById(R.id.description);
 itemView.setOnClickListener(this);
 }

 @Override
 public void onClick(View v) {
 //Call FragmentManager and add Fragment to it.
 }
 }
</code></pre>

So, how to call FragmentManager and add Fragments in it. Is there any better way than this like sendingBroadcast or any other method.

How to call getFragmentManager on Recycler.Adapter?

我正在将我的应用程序的ListView转换为RecyclerView。在ListView上，实现OnClickListener非常容易，但在RecyclerView中，我们必须在适配器中实现它。当用户点击一个项目时，我想打开一个新的片段。要做到这一点，我必须在适配器中调用FragmentManager，但我不能这样做。...

问如何在Recycler.Adapter上调用getFragmentManager？
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