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  • ViewPage和ActionBar打造滑动视图

    滑动效果非常流畅,可以将页签放置到ActionBar上,点击页签可以切换ViewPage,滑动ViewPage会同步更显Tabs。

    main.xml

    <?xml version="1.0" encoding="utf-8"?>
    <android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    
        <!-- 定义导航状态条组件 -->
    
        <android.support.v4.view.PagerTitleStrip
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:background="#33b5e5"
            android:paddingBottom="4dp"
            android:paddingTop="4dp"
            android:textColor="#fff" />
    
    </android.support.v4.view.ViewPager>

    ActionBar_TabNavSwipe.java

    package org.crazyit.ui;
    
    import android.app.ActionBar;
    import android.app.FragmentTransaction;
    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentActivity;
    import android.support.v4.app.FragmentPagerAdapter;
    import android.support.v4.view.ViewPager;
    
    /**
     * Description: <br/>
     * website: <a href="http://www.crazyit.org">crazyit.org</a> <br/>
     * Copyright (C), 2001-2014, Yeeku.H.Lee <br/>
     * This program is protected by copyright laws. <br/>
     * Program Name: <br/>
     * Date:
     * 
     * @author Yeeku.H.Lee kongyeeku@163.com
     * @version 1.0
     */
    public class ActionBar_TabSwipeNav extends FragmentActivity implements
            ActionBar.TabListener {
        ViewPager viewPager;
        ActionBar actionBar;
    
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            // 获取ActionBar对象
            actionBar = getActionBar();
            // 获取ViewPager
            viewPager = (ViewPager) findViewById(R.id.pager);
            // 创建一个FragmentPagerAdapter对象,该对象负责为ViewPager提供多个Fragment
            FragmentPagerAdapter pagerAdapter = new FragmentPagerAdapter(
                    getSupportFragmentManager()) {
                // 获取第position位置的Fragment
                @Override
                public Fragment getItem(int position) {
                    Fragment fragment = new DummyFragment();
                    Bundle args = new Bundle();
                    args.putInt(DummyFragment.ARG_SECTION_NUMBER, position + 1);
                    fragment.setArguments(args);
                    return fragment;
                }
    
                // 该方法的返回值i表明该Adapter总共包括多少个Fragment
                @Override
                public int getCount() {
                    return 3;
                }
    
                // 该方法的返回值决定每个Fragment的标题
                @Override
                public CharSequence getPageTitle(int position) {
                    switch (position) {
                    case 0:
                        return "第一页";
                    case 1:
                        return "第二页";
                    case 2:
                        return "第三页";
                    }
                    return null;
                }
            };
            // 设置ActionBar使用Tab导航方式
            actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
            // 遍历pagerAdapter对象所包含的全部Fragment。
            // 每个Fragment对应创建一个Tab标签
            for (int i = 0; i < pagerAdapter.getCount(); i++) {
                actionBar
                        .addTab(actionBar.newTab()
                                .setText(pagerAdapter.getPageTitle(i))
                                .setTabListener(this));
            }
            // 为ViewPager组件设置FragmentPagerAdapter
            viewPager.setAdapter(pagerAdapter); //// 为ViewPager组件绑定事件监听器
            viewPager
                    .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
                        // 当ViewPager显示的Fragment发生改变时激发该方法
                        @Override
                        public void onPageSelected(int position) {
                            actionBar.setSelectedNavigationItem(position);
                        }
                    });
        }
    
        @Override
        public void onTabUnselected(ActionBar.Tab tab,
                FragmentTransaction fragmentTransaction) {
        }
    
        // 当指定Tab被选中时激发该方法
        @Override
        public void onTabSelected(ActionBar.Tab tab,
                FragmentTransaction fragmentTransaction) {
            viewPager.setCurrentItem(tab.getPosition()); //
        }
    
        @Override
        public void onTabReselected(ActionBar.Tab tab,
                FragmentTransaction fragmentTransaction) {
        }
    }

    DummyFragment.java

    package org.crazyit.ui;
    
    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.view.Gravity;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.TextView;
    
    /**
     * Description: <br/>
     * 网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> <br/>
     * Copyright (C), 2001-2014, Yeeku.H.Lee <br/>
     * This program is protected by copyright laws. <br/>
     * Program Name: <br/>
     * Date:
     * 
     * @author Yeeku.H.Lee kongyeeku@163.com
     * @version 1.0
     */
    public class DummyFragment extends Fragment {
        public static final String ARG_SECTION_NUMBER = "section_number";
    
        // 该方法的返回值就是该Fragment显示的View组件
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            TextView textView = new TextView(getActivity());
            textView.setGravity(Gravity.CENTER_HORIZONTAL);
            // 获取创建该Fragment时传入的参数Bundle
            Bundle args = getArguments();
            // 设置TextView显示的文本
            textView.setText(args.getInt(ARG_SECTION_NUMBER) + "");
            textView.setTextSize(30);
            // 返回该TextView
            return textView;
        }
    }

    截图:

    image

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  • 原文地址:https://www.cnblogs.com/AndyGe/p/3434836.html
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