0

我尝试在我的 android 项目中实现一个带有 SWIPE 选项卡的应用程序栏。假设我有两个选项卡(tab1 和 tab2)。我想在这些选项卡上显示不同的内容。(实际上这就是我想做的所有事情)。

Tab1 包括一个列表,Tab2 包括“另一个”列表和一些文本。是否可以为两个选项卡使用两个“活动”?(这就是我现在正在做的)

我使用自定义适配器来设置列表内容。

 final ListView lv = (ListView)findViewById(R.id.tab1_list);
 lv.setAdapter(new CustomListAdapter(this, tab1Items));

但我无法正确显示标签内容。它们要么根本不显示,要么显示相同的内容。

有没有人对我有一些好主意,或者一些小代码示例,如何使用带有选项卡和列表的应用栏(使用适配器)?

我非常感谢任何帮助。

4

2 回答 2

2

这是您想要“滑动标签”的示例:

<?xml version="1.0" encoding="utf-8"?>
     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent">
        <TabHost
            android:id="@android:id/tabhost"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            >
            <LinearLayout
                android:orientation="vertical"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                >
                <TabWidget
                    android:id="@android:id/tabs"
                    android:orientation="horizontal"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="0"
                    />

                <FrameLayout
                    android:id="@android:id/tabcontent"
                    android:layout_width="0dp"
                    android:layout_height="0dp"
                    android:layout_weight="0"/>

                <android.support.v4.view.ViewPager
                    android:id="@+id/viewpager"
                    android:layout_width="fill_parent"
                    android:layout_height="0dp"
                    android:layout_weight="1"
                    />
            </LinearLayout>
        </TabHost>
    </LinearLayout>

定义 PagerAdapter :

package com.andy.fragments.viewpager;

import java.util.List;

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


public class PagerAdapter extends FragmentPagerAdapter {

    private List<Fragment> fragments;

    public PagerAdapter(FragmentManager fm, List<Fragment> fragments) {
        super(fm);
        this.fragments = fragments;
    }

    @Override
    public Fragment getItem(int position) {
        return this.fragments.get(position);
    }


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

定义 Tab FragmentActivity:

package com.andy.fragments.tabs;

import java.util.HashMap;
import java.util.List;
import java.util.Vector;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.TabHost;
import android.widget.TabHost.TabContentFactory;

import com.andy.R;
import com.andy.fragments.viewpager.PagerAdapter;


public class TabsViewPagerFragmentActivity extends FragmentActivity implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener {

    private TabHost mTabHost;
    private ViewPager mViewPager;
    private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, TabsViewPagerFragmentActivity.TabInfo>();
    private PagerAdapter mPagerAdapter;

    private class TabInfo {
         private String tag;
         private Class<?> clss;
         private Bundle args;
         private Fragment fragment;
         TabInfo(String tag, Class<?> clazz, Bundle args) {
             this.tag = tag;
             this.clss = clazz;
             this.args = args;
         }

    }

    class TabFactory implements TabContentFactory {

        private final Context mContext;

        public TabFactory(Context context) {
            mContext = context;
        }


        public View createTabContent(String tag) {
            View v = new View(mContext);
            v.setMinimumWidth(0);
            v.setMinimumHeight(0);
            return v;
        }

    }

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.tabs_viewpager_layout);

        this.initialiseTabHost(savedInstanceState);
        if (savedInstanceState != null) {
            mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); 
        }

        this.intialiseViewPager();
    }


    protected void onSaveInstanceState(Bundle outState) {
        outState.putString("tab", mTabHost.getCurrentTabTag()); 
        super.onSaveInstanceState(outState);
    }


    private void intialiseViewPager() {

        List<Fragment> fragments = new Vector<Fragment>();
        fragments.add(Fragment.instantiate(this, Tab1Fragment.class.getName()));
        fragments.add(Fragment.instantiate(this, Tab2Fragment.class.getName()));
        fragments.add(Fragment.instantiate(this, Tab3Fragment.class.getName()));
        this.mPagerAdapter  = new PagerAdapter(super.getSupportFragmentManager(), fragments);

        this.mViewPager = (ViewPager)super.findViewById(R.id.viewpager);
        this.mViewPager.setAdapter(this.mPagerAdapter);
        this.mViewPager.setOnPageChangeListener(this);
    }


    private void initialiseTabHost(Bundle args) {
        mTabHost = (TabHost)findViewById(android.R.id.tabhost);
        mTabHost.setup();
        TabInfo tabInfo = null;
        TabsViewPagerFragmentActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Tab 1"), ( tabInfo = new TabInfo("Tab1", Tab1Fragment.class, args)));
        this.mapTabInfo.put(tabInfo.tag, tabInfo);
        TabsViewPagerFragmentActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Tab 2"), ( tabInfo = new TabInfo("Tab2", Tab2Fragment.class, args)));
        this.mapTabInfo.put(tabInfo.tag, tabInfo);
        TabsViewPagerFragmentActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab 3"), ( tabInfo = new TabInfo("Tab3", Tab3Fragment.class, args)));
        this.mapTabInfo.put(tabInfo.tag, tabInfo);

        mTabHost.setOnTabChangedListener(this);
    }


    private static void AddTab(TabsViewPagerFragmentActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) {

        tabSpec.setContent(activity.new TabFactory(activity));
        tabHost.addTab(tabSpec);
    }


    public void onTabChanged(String tag) {

        int pos = this.mTabHost.getCurrentTab();
        this.mViewPager.setCurrentItem(pos);
    }


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


    }


    @Override
    public void onPageSelected(int position) {

        this.mTabHost.setCurrentTab(position);
    }


    @Override
    public void onPageScrollStateChanged(int state) {


    }
}
于 2012-11-21T12:30:07.520 回答
1

为什么不使用布局方法?创建一个布局,其中放置一个选项卡主机,如下所示:

<?xml version="1.0" encoding="utf-8"?>

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android1="http://schemas.android.com/apk/res/android"
android1:id="@android:id/tabhost"
android1:layout_width="match_parent"
android1:layout_height="match_parent" >

<TabWidget
    android1:id="@android:id/tabs"
    android1:layout_width="match_parent"
    android1:layout_height="wrap_content" >
</TabWidget>

<FrameLayout
    android1:id="@android:id/tabcontent"
    android1:layout_width="match_parent"
    android1:layout_height="match_parent" >

    <LinearLayout
        android1:id="@+id/tab1"
        android1:layout_width="match_parent"
        android1:layout_height="match_parent" >
    </LinearLayout>

    <LinearLayout
        android1:id="@+id/tab2"
        android1:layout_width="match_parent"
        android1:layout_height="match_parent" >
    </LinearLayout>

    <LinearLayout
        android1:id="@+id/tab3"
        android1:layout_width="match_parent"
        android1:layout_height="match_parent" >
    </LinearLayout>
</FrameLayout>

因此,在 ID 为tab1的 LinearLayout 中,您可以添加第一个列表(等等)。

于 2012-11-21T12:11:17.510 回答