Question

我做了recyclerView，每个孩子都是“详细信息”。

我现在询问当用户点击“详细信息”时如何将用户发送到下一个活动。每次点击都会将他发送给其他活动。

 private List<ParentObject> initData() {
    TitleCreator titleCreator = TitleCreator.get(this);
    List<TitleParent> titles = titleCreator.getAll();

    List<ParentObject> parentObject = new ArrayList<>();
    for(TitleParent title:titles)
    {
        List<Object> childList = new ArrayList<>();
        childList.add(new TitleChild("Detail", ""));
        title.setChildObjectList(childList);
        parentObject.add(title);
    }
    return parentObject;

}

这是我将每个孩子设置为“详细信息”的代码。

我有四个父标题，当然还有四个子标题。当用户点击第一个*父标题时，它会打开 child 标题。问题是当用户点击这个孩子标题时如何将他发送到其他活动？

这是我的适配器fil

package com.example.user_pc.glavnastranicaprojekat.Adapter;


import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import 
com.bignerdranch.expandablerecyclerview.Adapter.ExpandableRecyclerAdapter;
import com.bignerdranch.expandablerecyclerview.Model.ParentObject;
import com.example.user_pc.glavnastranicaprojekat.models.TitleChild; 
import com.example.user_pc.glavnastranicaprojekat.models.TitleParent;
import com.example.user_pc.glavnastranicaprojekat.R;
import 
com.example.user_pc.glavnastranicaprojekat.ViewHolders.TitleChildViewHolder;
import
com.example.user_pc.glavnastranicaprojekat.ViewHolders.TitleParentViewHolder;

import java.util.List;



public class MyAdapter extends 
ExpandableRecyclerAdapter<TitleParentViewHolder,TitleChildViewHolder> {

LayoutInflater inflater;

public MyAdapter(Context context, List<ParentObject> parentItemList) {
    super(context, parentItemList);
    inflater = LayoutInflater.from(context);
}

@Override
public TitleParentViewHolder onCreateParentViewHolder(ViewGroup viewGroup) {
    View view = inflater.inflate(R.layout.list_parent,viewGroup,false);
    return new TitleParentViewHolder(view);
}

@Override
public TitleChildViewHolder onCreateChildViewHolder(ViewGroup viewGroup) {
    View view = inflater.inflate(R.layout.list_child,viewGroup,false);
    return new TitleChildViewHolder(view);
}

@Override
public void onBindParentViewHolder(TitleParentViewHolder titleParentViewHolder, int i, Object o) {
    TitleParent title = (TitleParent)o;
    titleParentViewHolder._textView.setText(title.getTitle());

}

@Override
public void onBindChildViewHolder(TitleChildViewHolder titleChildViewHolder, int i, Object o) {
    TitleChild title = (TitleChild)o;
    titleChildViewHolder.option1.setText(title.getOption1());
    titleChildViewHolder.option2.setText(title.getOption2());

}
}

TitleParent.java：

package com.example.user_pc.glavnastranicaprojekat.models;

import com.bignerdranch.expandablerecyclerview.Model.ParentObject;

import java.util.List;
import java.util.UUID;



public class TitleParent implements ParentObject{

private List<Object> mChildrenList;
private UUID _id;
private String title;

public TitleParent(String title) {
    this.title = title;
    _id = UUID.randomUUID();
}

public UUID get_id() {
    return _id;
}

public void set_id(UUID _id) {
    this._id = _id;
}

public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}

@Override
public List<Object> getChildObjectList() {
    return mChildrenList;
}

@Override
public void setChildObjectList(List<Object> list) {
    mChildrenList = list;
}
}

这是TitleChild.java：

package com.example.user_pc.glavnastranicaprojekat.models;


public class TitleChild {

public String option1;
public String option2;

public TitleChild(String option1, String option2) {
    this.option1 = option1;
    this.option2 = option2;
}

public String getOption1() {
    return option1;
}

public void setOption1(String option1) {
    this.option1 = option1;
}

public String getOption2() {
    return option2;
}

public void setOption2(String option2) {
    this.option2 = option2;
}


}

TitleCreator.java：

package com.example.user_pc.glavnastranicaprojekat.models;


import android.content.Context;

import java.util.ArrayList;
import java.util.List;



public class TitleCreator {
static TitleCreator _titleCreator;
List<TitleParent> _titleParents;

public TitleCreator(Context context) {
    _titleParents = new ArrayList<>();


    TitleParent title = new TitleParent(String.format("Coppa"));
    _titleParents.add(title);


    TitleParent title1 = new TitleParent(String.format("Levante"));
    _titleParents.add(title1);


    TitleParent title2 = new TitleParent(String.format("Monument"));
    _titleParents.add(title2);

    TitleParent title3 = new TitleParent(String.format("Comming soon"));
    _titleParents.add(title3);

}

public static TitleCreator get(Context context)
{
    if(_titleCreator == null)
        _titleCreator = new TitleCreator(context);
    return _titleCreator;
}

public List<TitleParent> getAll() {
    return _titleParents;
}
}

TitleChildViewHolder：

package com.example.user_pc.glavnastranicaprojekat.ViewHolders;


import android.view.View;
import android.widget.TextView;

import com.bignerdranch.expandablerecyclerview.ViewHolder.ChildViewHolder;

import com.example.user_pc.glavnastranicaprojekat.R;



public class TitleChildViewHolder extends ChildViewHolder {
public TextView option1,option2;
public TitleChildViewHolder(View itemView) {
    super(itemView);
    option1 = itemView.findViewById(R.id.option1);
    option2 = itemView.findViewById(R.id.option2);

}
}

TitleParentViewHolder：

package com.example.user_pc.glavnastranicaprojekat.ViewHolders;


import android.view.View;
import android.widget.ImageButton;
import android.widget.TextView;

import com.bignerdranch.expandablerecyclerview.ViewHolder.ParentViewHolder;
import com.example.user_pc.glavnastranicaprojekat.R;



public class TitleParentViewHolder extends ParentViewHolder {
public TextView _textView;
public ImageButton _imageButton;

 public TitleParentViewHolder(View itemView) {
    super(itemView);
    _textView = itemView.findViewById(R.id.parentTitle);
    _imageButton =  itemView.findViewById(R.id.expandArrow);


}
}

MainActivity：

    RecyclerView recyclerView;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_map);
recyclerView = findViewById(R.id.myRecyclerView);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
MyAdapter adapter = new MyAdapter(this,initData());
    adapter.setParentClickableViewAnimationDefaultDuration();
    adapter.setParentAndIconExpandOnClick(true);

    recyclerView.setAdapter(adapter);

}

 private List<ParentObject> initData() {
    TitleCreator titleCreator = TitleCreator.get(this);
    List<TitleParent> titles = titleCreator.getAll();



    List<ParentObject> parentObject = new ArrayList<>();
    for(TitleParent title:titles)
    {
        List<Object> childList = new ArrayList<>();
        childList.add(new TitleChild("Detail", ""));
        title.setChildObjectList(childList);
        parentObject.add(title);

    }
    return parentObject;

}

Answer 1

titleChildViewHolder.itemView.setOnClickListener(
      new OnClickListener(View v){
          context.startActivity(new Intent(context,DESTINATION_ACTIVITY.class)));
     }
);

将此代码放在onBindChildViewHolder

中

Answer 2

尝试这样的事情：

@Override
public void onBindChildViewHolder(TitleChildViewHolder titleChildViewHolder, int i, Object o) {
    TitleChild title = (TitleChild)o;
    titleChildViewHolder.option1.setText(title.getOption1());
    titleChildViewHolder.option2.setText(title.getOption2());

    titleChildViewHolder.option1.setOnClickListener(
      new OnClickListener(View v){
          context.startActivity(new Intent(context,ACTIVITY_TO_LAUNCH.class)));
     }
);
}

如果需要，还可以在titleChildViewHolder.option2

上设置等效的OnClickListener

也许你可以添加一个视图option1和option2的容器，这样你就可以只设置一个ClickListener

RrecyclerView / List setOnClickListener

2 个答案: