如何从类的方法传递意图的上下文？

Question

错误：java.lang.NullPointerException：试图在com.adriitsolutions.prarthana.AdapterforListView.MyRequestForBloodRequirementListRecolyerView$1处的空对象引用上调用虚拟html" target="_blank">方法“Android.Content.Context Android.Content.Context.GetApplicationContext（）”。在Android.View.View.PerformClick（View.java:6935)处的OnClick（MyRequestForBloodRequirementListRecolyerView.153)以下是我的代码。

java((MyViewWholderForRecyclerViewOfMenu)ViewWholder).iv_My_Request_View.SetOnClickListener（新建View.OnClickListener（）{@override public void onClick（View v）{//showLeadDetails（position）；context.StartActivity（新建意图（context,ViewDonorListActivity.Class））；log.e（“onClick”,“View Request”）；}}）；

Adapter :  @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {



        holder.sendAt.setText(mData.get(position).getSendAt());
        holder.radius.setText(mData.get(position).getRadius());
        holder.acceptedStatus.setText(mData.get(position).getAcceptedStatus());

        holder.requestBloodGrpType.setImageResource(mData.get( position ).getRequestBloodGrpType() );
        //holder.requestUrgenyType.setImageResource( mData.get( position ).getRequestUrgencyType() );

        holder.viewRequest.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mContext.startActivity(new Intent(mContext,ViewDonorListActivity.class));
            }
        } );

       /* holder.buttonView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mContext.startActivity(new Intent(mContext,ViewDonorListActivity.class));
            }
        });*/

    }

Answer 1

只需从ViewWholder的itemView中使用上下文-

解决方案

Context context = holder.itemView.getContext();
context.startActivity(new Intent(context,ViewDonorListActivity.class));