如何通过RecyclerViewAdapter将数据从活动传递到片段？

Question

我在Recycler视图适配器上使用startActivityForResult。然后我想从新活动按下来将值传递给附加了recyclerview的片段。

我试过了：

RecyclerViewAdapter.java

@Override
public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, final int i) {


    myViewHolder.parentLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(mContext, mData.get(i).getText(), Toast.LENGTH_SHORT).show();

            Intent intent = new Intent(mContext, IntentActivity.class);

            Bundle bundle = new Bundle();
            bundle.putInt("Image",mData.get(i).getPhoto());
            bundle.putString("WebSite",mData.get(i).getWebSite());
            bundle.putInt("Heart",mData.get(i).getHeart());
            bundle.putInt("i",i);
            intent.putExtras(bundle);
            //mContext.startActivity(intent);
            ((Activity) mContext).startActivityForResult(intent,2);

        }
    });


    myViewHolder.love.setImageResource(mData.get(i).getHeart());
    myViewHolder.text.setText(mData.get(i).getText());
    myViewHolder.image.setImageResource(mData.get(i).getPhoto());
}

IntentActivity.java

@Override
public void onBackPressed() {
    super.onBackPressed();
    Toast.makeText(getApplication(),"back pressed", Toast.LENGTH_SHORT).show();

    Intent returnIntent = getIntent();
    returnIntent.putExtra("position",i);
    returnIntent.putExtra("isLoved",loved);
    setResult(RESULT_OK, returnIntent);
    finish();
}

然后在Fragment类中我这样做：

PageOne.java

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 2) {
        if (resultCode == RESULT_OK) {
            String result = data.getStringExtra("isLoved");

            Toast.makeText(getActivity(),result,Toast.LENGTH_SHORT).show();


        }
    }
}

什么都没发生，Toast.makeText(getActivity(),result,Toast.LENGTH_SHORT).show();没有弹出。

Answer 1

您的活动的onActivityResult很可能会吃掉这个活动，请确保在您的活动中调用super.onActivityResult，如下所示：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data)
    ...
}