Question

同志们请帮助。

我创建了ViewPager，它显示一个空白屏幕。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_textgrid);
    viewPager = (ViewPager) findViewById(R.id.textpager);

    items = new ArrayList<RssItem>();


    LoadText loader = new LoadText();
    loader.execute();

}

private class LoadText extends AsyncTask<Void, Void, ArrayList<RssItem>> {

            @Override
        protected void onPostExecute(ArrayList<RssItem> result) {
            Log.i(LOG_TAG, "LOADED:" + result.size());
            Log.i(LOG_TAG, "CUUR_ITEM:" + viewPager.getCurrentItem());

            pd.dismiss();
            items.addAll(result);
            adapter = new TextAdapter(TextActivity.this, items);

            viewPager.setAdapter(adapter);

            adapter.notifyDataSetChanged();
            if (items.size() > 0) {
                viewPager.setCurrentItem(1);
                Log.i(LOG_TAG, "CUR_ITEM:" + viewPager.getCurrentItem());
            }

            super.onPostExecute(result);
        }
}

public class TextAdapter extends PagerAdapter {

    private Activity _activity;
    private ArrayList<RssItem> items;

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

    public TextAdapter(Activity activity, ArrayList<RssItem> items) {
        this._activity = activity;
        this.items = items;

    }

    private RssItem getItem(int pos) {
        return this.items.get(pos);
    }

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


    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        LayoutInflater inflater = (LayoutInflater) _activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View viewLayout = inflater.inflate(R.layout.activity_text, container,
                false);

        RssItem item = getItem(position);
        TextView title = (TextView) viewLayout.findViewById(R.id.textTitle);
        TextView rating = (TextView) viewLayout.findViewById(R.id.textRating);
        TextView author = (TextView) viewLayout.findViewById(R.id.textAuthor);
        TextView content = (TextView) viewLayout.findViewById(R.id.textContent);

        content.setText(item.getContent());
        title.setText(item.getTitle());
        rating.setText(item.getRating());
        author.setText(item.getAuthor());
        content.setText(item.getContent());

        return viewLayout;

    }

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

    }

}

日志显示上传了大量数据。

如果您更改程序页面，它会更改（在日志中可以看到）。

空白屏=（

Answer 1

尝试使用：

viewPager.offscreenPageLimit = adapter.count

ViewPager上的空白屏幕

1 个答案: