Question

instantiateItem的{{1}}上的PagerAdapter将错误的项目位置发送给有意图的活动。当我单击图像1时，它将发送图像2的信息，而当我单击图像2时，它将发送图像3的信息，依此类推。接收方活动收到的点击的发送方活动收到错误的图像和标题。我正在将viewpager与floatingActionButton一起使用来检测点击。

onclickListener

Answer 1

重写此方法以获取片段的当前位置。使用该位置获取有关当前点击的信息。

@Override
public void setPrimaryItem(ViewGroup container, int position, Object object) {

    Log.i(TAG, "setPrimaryItem: " + position);

    super.setPrimaryItem(container, position, object);
}

Answer 2

Vishrut Mavani的代码可以正常工作最终代码就是这种方式

@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, final int position) {

    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View slideLayout = inflater.inflate(R.layout.slide_item, null);

    final ImageView slideImg = slideLayout.findViewById(R.id.slide_img);
    final TextView slideText = slideLayout.findViewById(R.id.slide_title);
    final  FloatingActionButton fab = slideLayout.findViewById(R.id.floatingActionButton);

    slideImg.setImageResource(mList.get(position).getImage());
    slideText.setText(mList.get(position).getTitle());

    container.addView(slideLayout);

    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent intent = new Intent(mContext, MovieDetailActivity.class);
            intent.putExtra("title", slideTitle);
            intent.putExtra("imgURL", thumbnail);
            mContext.startActivity(intent);



        }
    });

    return slideLayout;

}

@Override
public int getCount() {
    return mList.size();
}

@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
    return view == object;
}


@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {

    container.removeView((View)object);
}
@Override
public void setPrimaryItem(ViewGroup container, int position, Object object){

    Log.i(TAG, "setPrimaryItem_che: " + position);

    super.setPrimaryItem(container, position, object);

    slideTitle = mList.get(position).getTitle();
    thumbnail = mList.get(position).getImage();
}

viewpager错误的项目位置pageradapter

2 个答案: