新活动未启动（应用已停止）

Question

我想通过单击Recyclerview中的cardview(item)来打开新活动。但我的新的活动是无法启动和应用程序已停止弹起

我的适配器类是

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{ 

private List<Contacts> listitems; 
private Context context; 

public interface OnItemClickListener{ 
    void onItemClick(Contacts item); 
} 

public MyAdapter(List<Contacts> listitems, Context context) { 
    this.listitems = listitems; 
    this.context = context; 
} 

@Override 
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item,parent,false); 
    return new ViewHolder(v); 
} 

@Override 
public void onBindViewHolder(MyAdapter.ViewHolder holder, int position) { 
    Contacts c = listitems.get(position); 

    holder.t1.setText(c.getName()); 
    holder.t2.setText(c.getNumber()); 

} 

@Override 
public int getItemCount() { 
    return listitems.size(); 
} 

public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { 
    public TextView t1,t2; 
    public ImageView image; 

    public ViewHolder(View itemView) { 
     super(itemView); 

     itemView.setOnClickListener(this); 

     t1 = (TextView) itemView.findViewById(R.id.textview1); 
     t2 = (TextView) itemView.findViewById(R.id.textview2); 

    } 

    @Override 
    public void onClick(View v) { 
     itemView.getContext().startActivity(new Intent(context,Details.class)); 
    } 
} 
} 

Answer 1

只需更换

itemView.getContext().startActivity(new Intent(context,Details.class)); 

与

context.startActivity(new Intent(context,Details.class)); 

Answer 2

您使用回收

然后你可以在你的活动中使用它，而不是在适配器中

recyclerview.onaddOnItemTouchListener(new RecyclerItemClickListener(this, new RecyclerItemClickListener.OnItemClickListener() { 
    @Override 
    public void onItemClick(View view, int position) { 
     Activity_name.startActivity(new Intent(context,Details.class)); 
    } 
}));