动态添加标签到 SlidingTabLayout (Android)答案

【问题标题】：Add a tab to SlidingTabLayout dynamically (Android)动态添加标签到 SlidingTabLayout (Android)
【发布时间】：2015-07-30 17:22:06
【问题描述】：

我按照这些guidelines 创建了一个带有片段的滑动选项卡布局。问题是我想向 SlidingTabLayout 动态添加一个选项卡。以下代码创建了一个片段，但不显示。如何将它附加到 SlidingTabLayout？

android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
tableFragment = (ReportTableFragment) adapter.getItem(1);
fragmentTransaction.replace(R.id.pager, tableFragment, tableFragment.getClass().getName());
fragmentTransaction.commit();

这是我的 ViewPagerAdapter 类

public class ViewPagerAdapter extends FragmentStatePagerAdapter {

CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created


// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
    super(fm);

    this.Titles = mTitles;
    this.NumbOfTabs = mNumbOfTabsumb;

}

//This method return the fragment for the every position in the View Pager
@Override
public Fragment getItem(int position) {

    if(position == 0) // if the position is 0 we are returning the First tab
    {
        //ReportMapFragment reportMapTab = new ReportMapFragment();
        //return reportMapTab;
        SupportMapFragment mapTab = new SupportMapFragment();
        return mapTab;
    }
    else
    {
        return ReportTableFragment.newInstance(1);
    }

}

// This method return the titles for the Tabs in the Tab Strip

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

// This method return the Number of tabs for the tabs Strip

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

}

【问题讨论】：

标签： android android-fragments tabs

【解决方案1】：

解决方案很简单 :) 您应该将此方法添加到您的“ViewPagerAdapter”并通过此更改 CharSequence

List<String> titles = new ArrayList<String>();

现在构造函数应该是：

public ViewPagerAdapter(FragmentManager fm, List<String> mTitles, int mNumbOfTabsumb) {
    super(fm);

    this.titles = mTitles;
    this.numbOfTabs = mNumbOfTabsumb;
}

添加到“ViewPagerAdapter”的方法：

public void addTab (String title) {
    this.titles.add(title);
    this.numbOfTabs++;
    this.notifyDataSetChanged();
}

public void deleteTab (int position) {
    this.titles.remove(position);
    this.numbOfTabs--;
    this.notifyDataSetChanged();
}

从您的活动或您调用 SlidingTabLayout 的任何位置：

this.mAdapter.addTab("NewTab"); // add a new tab
this.mAdapter.deleteTab(0); // or delete a current tab
this.mTabs.setViewPager(this.mPager); // don't forget this line, is the key

注意“ViewPagerAdapter”中的“getItem”方法，因为现在您正在动态添加选项卡；）

我。

【讨论】：