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Android典型界面设计(7) ——DrawerLayout+Fragement+ViewPager+PagerTabStrip实现双导航

时间:2015-09-02 17:22:27      阅读:319      评论:0      收藏:0      [点我收藏+]

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一、问题描述

  在Android典型界面设计(3)的我们实现了双导航效果,即外层底部导航和内部区域的头部导航,如网易新闻等很多应用采用了这种导航,但Google提供DrawerLayout可实现抽屉式导航,建议使用DrawerLayout代替底部导航,下面我们就使用官方提供的DrawerLayout+Fragement+ViewPager+PagerTabStrip实现下图效果:

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二、本例相关技术

1、 DrawerLayout 抽屉式导航

2、 Fragment管理

3、 ViewPager和PagerTabStrip的使用

三、实现过程

  1、  考虑到向下兼容要使用V4和V7包

  V4建工程已经加入,需在项目中导入v7兼容包的android-support-v7-appcompat

  2、  MainActivity组件

  先看一下布局文件

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- 包含主要内容的 view -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <!-- navigation drawer(抽屉式导航) -->
    <ListView android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#fff"/>
</android.support.v4.widget.DrawerLayout>

  DrawerLayout有两个子视图(child view):一个FrameLayout用来包含主要内容(在运行时填入Fragment),和一个navigation drawer这里使用的ListView。

navigation drawer部分必须使用android:layout_gravity属性指定它的horizontal gravity

“start”表示左侧,”end”表示右侧

  3、  MainActivity代码:

public class MainActivity extends ActionBarActivity implements 
OnItemClickListener{
    private DrawerLayout drawerLayout;
    private ActionBarDrawerToggle toggle;
    private ListView navList;
    private FragmentManager fm;
    private List<Fragment> fragments;
    private ArrayAdapter<String> adapter;
    private ActionBar actionBar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        drawerLayout=(DrawerLayout)super.findViewById(R.id.drawer_layout);
        navList=(ListView)super.findViewById(R.id.left_drawer);
        navList.setOnItemClickListener(this);
        fragments=new ArrayList<Fragment>();
        fm=super.getSupportFragmentManager();
        initListView();
        initActionBar();
        initDrawerLayout();
        initFragments();
    }
            private String[] tabs=new String[]{"新闻","阅读 ","视听","发现","我的设置 "};
        /**
    初始化drawer的item列表。这要根据你的app内容来处理,但是一个navigation drawer通常由一个ListView组成,所以列表应该通过一个Adapter填入。
*/
    private void initListView(){
        adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,
                tabs);
        navList.setAdapter(adapter);
    }
    private void initFragments(){
        NewsFragment newsFragment=new NewsFragment();
        fragments.add(newsFragment);
        ReadFragment readFragment=new ReadFragment();
        fragments.add(readFragment);
        VideoFragment videoFragment=new VideoFragment();
        fragments.add(videoFragment);
        FoundFragment foundFragment=new FoundFragment();
        fragments.add(foundFragment);
        OwnerFragment ownerFragment=new OwnerFragment();
        fragments.add(ownerFragment);
        setFragments(0);
    }
    private void setFragments(int position){
        fm.beginTransaction().replace(R.id.content_frame, 
                fragments.get(position),"t"+position).commit();
    }
    private void initActionBar(){
        actionBar=super.getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setIcon(new ColorDrawable(0));
        actionBar.setTitle(tabs[0]);    
    }
    private void initDrawerLayout(){
        toggle=new ActionBarDrawerToggle(this, drawerLayout, 
                R.drawable.com_btn, R.string.drawer_open,
                R.string.drawer_closed){
                    /** 当drawer处于完全关闭的状态时调用 */
                    @Override
                    public void onDrawerClosed(View drawerView) {
                        super.onDrawerClosed(drawerView);
                    }
                       /** 当drawer处于完全打开的状态时调用 */
                    @Override
                    public void onDrawerOpened(View drawerView) {
                        super.onDrawerOpened(drawerView);
                    }
            
        };
        // 设置drawer触发器为DrawerListener
        drawerLayout.setDrawerListener(toggle);
    }
    private void toggleNav(){
        if(drawerLayout.isDrawerOpen(Gravity.START)){
            drawerLayout.closeDrawer(Gravity.START);
        }else{
            drawerLayout.openDrawer(Gravity.START);
        }
        
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
                getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
  @Override
   public boolean onOptionsItemSelected(MenuItem item){
      switch(item.getItemId()){
          case android.R.id.home:
          toggleNav();
          break;
      }
      return true;
  }

  4、  NewsFragment组件

public class NewsFragment extends Fragment {
    private ViewPager mViewPager;
    private List<String> tabs;
    private List<Fragment> fragmentList;
    private NewsFragmentPagerAdapter adapter;

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onActivityCreated(savedInstanceState);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
    }

    private View view;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        if(view==null){
            view=inflater.inflate(R.layout.news_fragment, null);
            mViewPager=(ViewPager)view.findViewById(R.id.pager);
            initViewPager();
        }
        ViewGroup parent=(ViewGroup)view.getParent();
        if(parent!=null) parent.removeView(view);
        return view;
    }
    private void initViewPager(){
        setTabs();
        setFragments();
        adapter=new NewsFragmentPagerAdapter(super.getActivity().getSupportFragmentManager(), 
                fragmentList, tabs);
        mViewPager.setAdapter(adapter);
    }
    
    private void setFragments(){
        fragmentList=new ArrayList<Fragment>();
        for(int i=0;i<tabs.size();i++){
            NewsChannelFragment fragment=new NewsChannelFragment();
            Bundle bundle=new Bundle();
            bundle.putString("title", tabs.get(i)+"区域");
            fragment.setArguments(bundle);
            fragmentList.add(fragment);
            
        }
    }
    private void setTabs(){
        tabs=new ArrayList<String>();
        tabs.add("头条");
        tabs.add("娱乐");
        tabs.add("体育");
        tabs.add("财经");
        tabs.add("热点");
        tabs.add("科技");
    }
    @Override
    public void onDestroyView() {
        // TODO Auto-generated method stub
        super.onDestroyView();
    }

}

NewsFragment的布局文件:

<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">
    <android.support.v4.view.PagerTabStrip
        android:id="@+id/pager_tab_strip"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:background="#33b5e5"
        android:textColor="#fff"
        android:paddingTop="4dp"
        android:paddingBottom="4dp" />
</android.support.v4.view.ViewPager>

NewsFragmentPagerAdapter代码:

public class NewsFragmentPagerAdapter extends FragmentPagerAdapter {
    private List<String> tabs;
    private List<Fragment> fragmentList;
    public NewsFragmentPagerAdapter(FragmentManager fm,
List<Fragment> fragmentList,List<String> tabs) {
        super(fm);
        this.tabs=tabs;
        this.fragmentList=fragmentList;
        
    }
    @Override
    public Fragment getItem(int idx) {
        return fragmentList.get(idx);
    }

    @Override
    public int getCount() {
        return fragmentList.size();
    }
    @Override
    public CharSequence getPageTitle(int position) {
        return tabs.get(position);
    }
}

  5、  ReadFragment代码(其他Fragment也简单处理同ReadFragment基本相同)

public class ReadFragment extends Fragment {

    @Override
    public void onAttach(Activity activity) {
        // TODO Auto-generated method stub
        super.onAttach(activity);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
        TextView tvTitle=new TextView(super.getActivity());
        tvTitle.setText("阅读");
        tvTitle.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));
        tvTitle.setBackgroundColor(Color.WHITE);
        return tvTitle;
    }
    @Override
    public void setArguments(Bundle args) {
        // TODO Auto-generated method stub
        super.setArguments(args);
    }

}

6、样式文件values/styles.xm 

    <style name="AppTheme" parent="@style/Theme.AppCompat.Light">
        <item name="actionBarStyle">@style/ActionBar.Solid</item>
        <item name="homeAsUpIndicator">@drawable/com_btn</item> 
        <item name="titleTextStyle">@style/ActionBar_TitleStyle</item>
    </style>
    <style name="ActionBar.Solid" parent="@style/Widget.AppCompat.Light.ActionBar.Solid">
        <item name="android:background">@drawable/ab_background</item>
        <item name="backgroundSplit">@drawable/ab_bottom_solid</item>    
    </style>
         <style name="ActionBar_TitleStyle">  
        <item name="android:textSize">18sp</item>
        <item name="android:textColor">#ffffff</item>  
</style>
values-v14/styles.xml
    <style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">
    </style>
  <style name="AppTheme" parent="@style/Theme.AppCompat.Light">
        <item name="android:actionBarStyle">@style/ActionBar.Solid</item>
        <item name="android:homeAsUpIndicator">@drawable/com_btn</item>     
    </style>
    <style name="ActionBar.Solid" parent="@style/Widget.AppCompat.Light.ActionBar.Solid">
        <item name="android:background">@drawable/ab_background</item>
        <item name="android:backgroundSplit">@drawable/ab_bottom_solid</item>
        <item name="android:titleTextStyle">@style/ActionBar_TitleStyle</item>
    </style>
     <style name="ActionBar_TitleStyle">  
        <item name="android:textSize">18sp</item>
        <item name="android:textColor">#ffffff</item>  
    </style>

 

  想要了解更多内容的小伙伴,可以点击查看源码,亲自运行测试。

  疑问咨询或技术交流,请加入官方QQ群:技术分享 (452379712)

 

作者:杰瑞教育
出处:http://www.cnblogs.com/jerehedu/ 
本文版权归烟台杰瑞教育科技有限公司和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。
 

 

Android典型界面设计(7) ——DrawerLayout+Fragement+ViewPager+PagerTabStrip实现双导航

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原文地址:http://www.cnblogs.com/jerehedu/p/4778985.html

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