这个怎么解决？？总是要求更改构造函数 --> mAdapter = new TabsPagerAdapter(getFragmentManager());

Posted 2023-04-15

【中文标题】这个怎么解决？？总是要求更改构造函数 --> mAdapter = new TabsPagerAdapter(getFragmentManager());

【英文标题】：How fix this ?? always asked to change constructor --> mAdapter = new TabsPagerAdapter(getFragmentManager());

【发布时间】：2014-06-04 10:37:57

【问题描述】：

我有 3 节课

主类 片段（寻呼机） 片段适配器

但是，在片段中，有问题，任何人都可以帮助我吗？？

public class AttractionFragment extends Fragment implements ActionBar.TabListener 

    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;
    // Tab titles
    private String[] tabs =  "Solo", "Karanganyar", "Sukoharjo" ;

public AttractionFragment()

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) 

        View rootView = inflater.inflate(R.layout.fragment_attraction, container, false);

        // Initilization
        viewPager = (ViewPager) rootView.findViewById(R.id.pager);
        actionBar = getActivity().getActionBar();

        //This my problem
        mAdapter = new TabsPagerAdapter(getFragmentManager());

        viewPager.setAdapter(mAdapter);
        actionBar.setHomeButtonEnabled(false);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);        

        // Adding Tabs
        for (String tab_name : tabs) 
            actionBar.addTab(actionBar.newTab().setText(tab_name)
                    .setTabListener(this));
        

        /**
         * on swiping the viewpager make respective tab selected
         * */
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() 

            @Override
            public void onPageSelected(int position) 
                // on changing the page
                // make respected tab selected
                actionBar.setSelectedNavigationItem(position);
            

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) 
            

            @Override
            public void onPageScrollStateChanged(int arg0) 
            
        );

        return rootView;
    

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

    

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) 
        // TODO Auto-generated method stub
        // on tab selected
        // show respected fragment view
        viewPager.setCurrentItem(tab.getPosition());

    

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

    

这是我的适配器类

public class TabsPagerAdapter extends FragmentStatePagerAdapter 

    public TabsPagerAdapter(FragmentManager fm) 
        super(fm);
    

    @Override
    public Fragment getItem(int index) 

        switch (index) 
        case 0:
            // Top Rated fragment activity
            return new SoloAttractionFragment();
        case 1:
            // Games fragment activity
            return new KaranganyarAttractionFragment();
        case 2:
            // Movies fragment activity
            return new SukoharjoAttractionFragment();
        

        return null;
    

    @Override
    public int getCount() 
        // get item count - equal to number of tabs
        return 3;
    

【问题讨论】：

仍然错误，我更改为 mAdapter = new TabsPagerAdapter(getSupportFragmentManager()); , [ AttractionFragment 类型的方法 getSupportFragmentManager() 未定义]

你需要使用getActivity().getSupportFragmentManager() 并且你的导入必须来自支持库

这一行有多个标记 - Activity 类型的方法 getSupportFragmentManager() 未定义 - 构造函数 TabsPagerAdapter(FragmentManager) 未定义

清单文件中的最小 sdk 是什么？？

还是错误，我改成 mAdapter = new TabsPagerAdapter(getActivity().getSupportFragmentManager());

【参考方案1】：

您正在使用 FragmentStatePagerAdapter`。

http://developer.android.com/reference/android/support/v4/app/FragmentStatePagerAdapter.html

您可能还想检查

Does the Android ICS API have a native equivalent to ViewPager support lib?

你需要改变很多东西。

活动中

public class MainActivity extends ActionBarActivity 

@Override
protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.custom_view);
        AttractionFragment newFragment = new AttractionFragment();
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.replace(R.id.container, newFragment);
        transaction.addToBackStack(null);
        transaction.commit();
 
 

AttractionFragment.java

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar.Tab;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class AttractionFragment extends Fragment implements ActionBar.TabListener 

    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;
    // Tab titles
    private String[] tabs =  "Solo", "Karanganyar", "Sukoharjo","Sragen","Boyolali","Klaten","Wonogiri"  ;

public AttractionFragment()

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) 

        View rootView = inflater.inflate(R.layout.frag2, container, false);

        // Initilization
        viewPager = (ViewPager) rootView.findViewById(R.id.pager);
        actionBar = ((ActionBarActivity) getActivity()).getSupportActionBar();

        //This my problem
        mAdapter = new TabsPagerAdapter(getActivity().getSupportFragmentManager());

        viewPager.setAdapter(mAdapter);
        actionBar.setHomeButtonEnabled(false);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);        

        // Adding Tabs
        for (String tab_name : tabs) 
            actionBar.addTab(actionBar.newTab().setText(tab_name)
                    .setTabListener(AttractionFragment.this));
        

        /**
         * on swiping the viewpager make respective tab selected
         * */
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() 

            @Override
            public void onPageSelected(int position) 
                // on changing the page
                // make respected tab selected
                actionBar.setSelectedNavigationItem(position);
            

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) 
            

            @Override
            public void onPageScrollStateChanged(int arg0) 
            
        );

        return rootView;
    

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

    

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) 
        // TODO Auto-generated method stub
        // on tab selected
        // show respected fragment view
        viewPager.setCurrentItem(tab.getPosition());

    

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

    

标签页适配器

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentStatePagerAdapter;


public class TabsPagerAdapter extends FragmentStatePagerAdapter 
public TabsPagerAdapter(android.support.v4.app.FragmentManager fragmentManager) 
    super(fragmentManager);


@Override
public Fragment getItem(int index) 
    Fragment fragment = null;
    switch (index) 

    case 0:
        // Top Rated fragment activity
        fragment =new SoloAttractionFragment();

    case 1:
        fragment = new KaranganyarAttractionFragment();
    case 2:
        // Movies fragment activity
        fragment = new SukoharjoAttractionFragment();
    

    return fragment ;


@Override
public int getCount() 
    // get item count - equal to number of tabs
    return 3;

捕捉

【讨论】：

还是报错，头晕，之前我是按照androidhive.info的教程做的，后来我修改了，因为我用的是带抽屉和滑动的导航标签。

@YeftaAndrea 你还想要什么。贴出代码。 psoted 快照。错误是什么。

拜托，我已经上传到Dropbox dropbox.com/s/vdxy6giip7r5p4a/yefta.rar

@YeftaAndrea 你根本没有关注帖子，你说你仍然收到错误

我很抱歉，但非常感谢@Raghunandan 的帮助，我已经知道解决方案，我发现我必须删除导入片段，因为我必须使用片段 v4，但非常感谢： )

【参考方案2】：

请尝试更改

public TabsPagerAdapter(FragmentManager fm) 
    super(fm);

与

public TabsPagerAdapter(android.app.FragmentManager.FragmentManager fm) 
    super(fm);

尽量不要使用支持片段管理器。

不，它不会给出错误，因为我已经尝试过下面的示例代码。

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;

public class MainActivity extends FragmentStatePagerAdapter 

public MainActivity(FragmentManager fm) 
    super(fm);


@Override
public Fragment getItem(int arg0) 
    return null;


@Override
public int getCount() 
    return 0;

【讨论】：

如果我这样更改，在 super(fm) 行中将显示错误通知以像以前一样更改源代码。