构造函数FragmentPagerAdapter（FragmentManager）是未定义 [英] The constructor FragmentPagerAdapter(FragmentManager) is undefined

问题描述

我也弄不清是怎么回事的构造函数标签适配器。

I can't figure out what is going on with the constructor for the tabs Adapter.

 public TabsAdapter(Activity activity, ViewPager pager) {
         super(activity.getSupportFragmentManager());

这是给我的错误信息：的方法getSupportFragmentManager（）是不确定的该类型活动

This is giving me the error message: The method getSupportFragmentManager() is undefined for the type Activity

我想我使用的是正确的进口。下面是code，它是非常直接从Android电子在这一点上复制pretty。

I think I am using the correct imports. Below is the code that is pretty much copied straight from Android at this point.

 import android.app.ActionBar;
 import android.app.ActionBar.Tab;
 import android.app.Activity;
 import android.app.FragmentTransaction;
 import android.content.Context;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
 import android.support.v4.view.ViewPager;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.view.ViewPager.OnPageChangeListener;

public class TabsAdapter extends FragmentPagerAdapter
     implements ActionBar.TabListener, ViewPager.OnPageChangeListener {

     private final Context mContext;
     private final ActionBar mActionBar;
     private final ViewPager mViewPager;
     private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();


     static final class TabInfo {

         private final Class<?> clss;
         private final Bundle args;

        TabInfo(Class<?> _class, Bundle _args) {
           clss = _class;
           args = _args;
        }
}

public TabsAdapter(Activity activity, ViewPager pager) {
    super(activity.getSupportFragmentManager());


    mContext = activity;
    mActionBar = activity.getActionBar();
    mViewPager = pager;
    mViewPager.setAdapter(this);
    mViewPager.setOnPageChangeListener(this);
}

public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {

    TabInfo info = new TabInfo(clss, args);
    tab.setTag(info);
    tab.setTabListener(this);
    mTabs.add(info);
    mActionBar.addTab(tab);
    notifyDataSetChanged();
}

@Override
public int getCount() {

    return mTabs.size();
}

@Override
public Fragment getItem(int position) {

    TabInfo info = mTabs.get(position);
    return Fragment.instantiate(mContext, info.clss.getName(), info.args);
}

@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

@Override
public void onPageSelected(int position) {

    mActionBar.setSelectedNavigationItem(position);
}

@Override
public void onPageScrollStateChanged(int state) {


}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {

}

@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
    // TODO Auto-generated method stub

}

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    Object tag = tab.getTag();
    for (int i=0; i<mTabs.size(); i++) {
        if (mTabs.get(i) == tag) {
            mViewPager.setCurrentItem(i);
        }
    }

}

 }

由于任何人采取看看这个！

Thanks to anyone taking a look at this!

推荐答案

改变

import android.app.Activity;

到

android.support.v4.app.FragmentActivity

您必须使用支持库。

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