在 viewpager 适配器中出现错误，java.lang.IllegalStateException: 指定的 child 已经有一个 parent

Question

我正在尝试将 viewpager 与图像一起使用，但如果我滑动它会崩溃，它只会显示一张照片，说 java.lang.IllegalStateException: 指定的 child 已经有一个 parent。您必须先在 child 的 parent 上调用 removeView()。 我的适配器代码是：

public class NewDemoAdapter extends PagerAdapter {
    public ArrayList<Integer> imagelist;
    public ArrayList<String> lines;
    public Context context;
    private ImageView imageView;
    private BitmapFactory.Options bounds;
    private ViewGroup viewPager;
    private Bitmap cropImg;
    private LayoutInflater mInflater;

    public NewDemoAdapter(Context context, ArrayList<Integer> imagelist, ArrayList<String> line) {

        this.imagelist = imagelist;
        this.lines = line;


    }


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

    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }

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

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

        mInflater = LayoutInflater.from(AppController.getAppContext());
        final View itemView = mInflater.inflate(R.layout.demolayout,container,false);

        ImageView imageView = (ImageView) itemView.findViewById(R.id.myimage);
        TextView textView = (TextView) itemView.findViewById(R.id.line);
        textView.setText(lines.get(position));
        imageView.setImageResource(imagelist.get(position));
        ((ViewPager) container).addView(imageView, 0);

        return itemView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        ((ViewPager) container).removeView((ImageView) object);
        ((ViewPager) container).removeView((TextView) object);
    }

}

Answer 1

问题出在这一行

((ViewPager) container).addView(imageView, 0);

ImageView (R.id.image) 作为父级 itemView ，这意味着它不能同时将 ViewPager 作为父级。变化

((ViewPager) container).addView(imageView, 0);

到

((ViewPager) container).addView(itemView, 0);

编辑

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

在 viewpager 适配器中出现错误，java.lang.IllegalStateException: 指定的 child 已经有一个 parent

Getting error in viewpager adapter,java.lang.IllegalStateException: The specified child already has a parent

android

android-viewpager