Recycler View中的意图？

Question

Could anyone help me out! Cant get the normal way of writing intent to launch a new activity inside my recycler view to work! Is there a new way you must do it? Any help would be hugely appreciated!

Here is my View Holder Code;

    class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    TextView title;
    ImageView icon;

    public MyViewHolder(View itemView, TextView textView) {
        super(itemView);
        title = (TextView) itemView.findViewById(R.id.listText);
        icon = (ImageView) itemView.findViewById(R.id.listImage);
        itemView.setOnClickListener(this);
        title = textView;
    }

    @Override
    public void onClick(View v) {
        if (getPosition() == 0) {
            Toast.makeText(v.getContext(), "Actvity 1", Toast.LENGTH_SHORT).show();
        }
        if (getPosition() == 1) {
            Toast.makeText(v.getContext(), "Actvity 2", Toast.LENGTH_SHORT).show();
        }
    }
  }
}

Answer 1

Initial click listeners in your viewHolder.

/**
 * see {@link <a href="https://youtu.be/imsr8NrIAMs?t=2163">Official Video</a>}
 */
public static class MyViewHolder extends RecyclerView.ViewHolder {

  public MyViewHolder(View itemView) {
    super(itemView);
    //TODO: findViewById or ButterKnife
    ....
    //set item view listener
    itemView.setOnClickListener(new View.OnClickListener() {
      @Override public void onClick(View itemView) {
        if (getAdapterPosition() != RecyclerView.NO_POSITION) {
          Context c = itemView.getContext();
          //TODO: startActivity
        }
      }
    });
    //TODO: set other child views' listener
    ....
  }
}

Answer 2

In your custom adapter create your own constructor. for Example:

  private Context context;
    public MyRecyclerViewAdapter(Context context,ArrayList<String> yourList){
            this.context=context;
            // further code
    }

and while calling your adapter just pass the reference of your context and now you can able to call intent via

context.startActivity() & all other methods.

Answer 3

The ViewHolder is just a container for the inner View objects within your specific layout for the item. Neither it or the RecyclerView.Adapter for your implementation have direct access to the Context object needed to send an Intent . Rather than set your OnClickListener here, put it in your adapter's onBindViewHolder() . Your adapter can be notified when its owning RecyclerView is attached to it, so you can save a reference to it in a private field. From that view you can call getContext() so you could then create an Intent and send it via the usual means.