Question

我正在开发Android屏幕，以使用tablayout和viewpager显示2个不同的仪表板，但在两个不同的标签（即MyDashboard和TeamDashboard上仅显示一个屏幕）请检查我的代码。我是android开发的新手。

我尝试将viewpager与pageradapter一起使用以滑动屏幕。

public class ViewPagerAdapter extends FragmentPagerAdapter {

    private int position;
    private String tabTitles[] = new String[]{"MyDashboard", "Team` `Dashboard"};

    public ViewPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int i) {

        //        MyDashboard_Fragment dashboard_fragment=new `MyDashboard_Fragment();
        //        TeamDashboard_Fragment dashboard_fragment1=new `TeamDashboard_Fragment();
        //        position = position + 1;
        //        Bundle bundle=new Bundle();
        //        bundle.putString("message","Fragment :" +position);
        //        dashboard_fragment.setArguments(bundle);

        //        return dashboard_fragment;

        Fragment fragment = null;
        switch (position) {
            case 0:
                fragment = new MyDashboard_Fragment();
                break;
            case 1:
                fragment = new TeamDashboard_Fragment();
                break;
        }
        return fragment;
    }


    @Override
    public int getCount() {
        return 2;
    }


    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        return tabTitles[position];
    }
}

Answer 1

问题是因为您没有在使用新值之前将其分配给位置变量，请像下面这样更新代码

public class ViewPagerAdapter extends FragmentPagerAdapter {

    private int position;
    private String tabTitles[] = new String[]{"MyDashboard", "Team` `Dashboard"};

    public ViewPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int i) {

        //        MyDashboard_Fragment dashboard_fragment=new `MyDashboard_Fragment();
        //        TeamDashboard_Fragment dashboard_fragment1=new `TeamDashboard_Fragment();
        //        position = position + 1;
        //        Bundle bundle=new Bundle();
        //        bundle.putString("message","Fragment :" +position);
        //        dashboard_fragment.setArguments(bundle);

        //        return dashboard_fragment;
        position=i;
        Fragment fragment = null;
        switch (position) {
            case 0:
                fragment = new MyDashboard_Fragment();
                break;
            case 1:
                fragment = new TeamDashboard_Fragment();
                break;
        }
        return fragment;
    }


    @Override
    public int getCount() {
        return 2;
    }


    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        return tabTitles[position];
    }
}

无法区分两个不同片段中包含的内容

1 个答案: