关于实现网易新闻客户端的界面,以前写过很多博客,请参考:
Android实现网易新闻客户端效果
Android实现网易新闻客户端侧滑菜单(一)
Android实现网易新闻客户端侧滑菜单(二)
今天用ViewPager + FragmentAdapter + ViewPagerIndicator来实现。
ViewPagerIndicator是一款分页指标小部件兼容ViewPager,封装上做得非常不错,目前已为众多知名应用所使用。具体API的使用,大家可以下载官方demo示例研究研究就知道啦!
下载地址:https://github.com/JakeWharton/ViewPagerIndicator
sample是提供给我们的例子,library是库工程,我们需要将其作为我们自己项目的依赖库,我们新建一个Android工程,将library导入工程我就不介绍了。
注:Eclipse: 如果你新建的项目libs目录下面有android-support-v4.jar,你要将其删除,因为ViewPageIndicator里面有这个库,我们项目中不允许两个android-support-v4.jar,不删除我们的项目不能编译的。
Android Studio: 直接import module就行。
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <include layout="@layout/activity_top" /> <com.viewpagerindicator.TabPageIndicator android:id="@+id/indicator" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@android:color/transparent" > </com.viewpagerindicator.TabPageIndicator> <android.support.v4.view.ViewPager android:id="@+id/viewpager" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#EEF3FA"> </android.support.v4.view.ViewPager> </LinearLayout>布局很简单,顶部引入了一个activity_top.xml的布局,具体内容可以自己定义。
MainActivity.java
package com.jackie.neteasenews; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.view.ViewPager; import com.viewpagerindicator.TabPageIndicator; import java.util.ArrayList; import java.util.List; public class MainActivity extends FragmentActivity { private TabPageIndicator mTabPageIndicator; private ViewPager mViewPager; private ViewPagerIndicatorAdapter mAdapter; private HeadlineFragment mHeadlineFragment; private EnjoyFragment mEnjoyFragment; private HotspotFragment mHotspotFragment; private SportFragment mSportFragment; private HouseFragment mHouseFragment; private List<Fragment> mFragmentList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { mTabPageIndicator = (TabPageIndicator) findViewById(R.id.indicator); mViewPager = (ViewPager) findViewById(R.id.viewpager); mHeadlineFragment = new HeadlineFragment(); mEnjoyFragment = new EnjoyFragment(); mHotspotFragment = new HotspotFragment(); mSportFragment = new SportFragment(); mHouseFragment = new HouseFragment(); mFragmentList = new ArrayList<>(); mFragmentList.add(mHeadlineFragment); mFragmentList.add(mEnjoyFragment); mFragmentList.add(mHotspotFragment); mFragmentList.add(mSportFragment); mFragmentList.add(mHouseFragment); mAdapter = new ViewPagerIndicatorAdapter(getSupportFragmentManager(), mFragmentList); mViewPager.setAdapter(mAdapter); //实例化TabPageIndicator然后设置ViewPager与之关联 mTabPageIndicator.setViewPager(mViewPager, 1); } }ViewPagerIndicatorAdapter.java
package com.jackie.neteasenews; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import java.util.List; public class ViewPagerIndicatorAdapter extends FragmentPagerAdapter { private List<Fragment> mFragmentList; public static String[] TITLES = new String[] { "头条", "娱乐", "热点", "体育", "房产" }; public ViewPagerIndicatorAdapter(FragmentManager fm, List<Fragment> fragmentList) { super(fm); this.mFragmentList = fragmentList; } @Override public Fragment getItem(int position) { return mFragmentList.get(position); } @Override public int getCount() { return mFragmentList.size(); } @Override public CharSequence getPageTitle(int position) { return TITLES[position]; } }代码很简单,但是有一点,上面的Indicator是系统默认的,不太好看,所以还需要在styles.xml添加下面的样式:
<style name="StyledTabPageIndicator" parent="@android:style/Theme.Light"> <item name="vpiTabPageIndicatorStyle">@style/CustomTabPageIndicator</item> <item name="android:windowNoTitle">true</item> <item name="android:animationDuration">5000</item> <item name="android:windowContentOverlay">@null</item> </style> <style name="CustomTabPageIndicator" parent="Widget"> <item name="android:gravity">center</item> <item name="android:background">@drawable/tab_indicator</item> <!--<item name="android:background">@drawable/vpi__tab_indicator</item>--> <item name="android:paddingLeft">22dip</item> <item name="android:paddingRight">22dip</item> <item name="android:paddingTop">8dp</item> <item name="android:paddingBottom">8dp</item> <item name="android:textAppearance">@style/CustomTabPageIndicator.Text</item> <item name="android:textSize">16sp</item> <item name="android:maxLines">1</item> </style> <style name="CustomTabPageIndicator.Text" parent="Widget"> <item name="android:textColor">@drawable/tab_text</item> </style>
注意:开发中过程中跟Fragment相关的类,导入包时会提示两个包android.app 和 android.support.v4.app,切记,要保证所有类都导入同一个包下的,否则会编译报错。
效果图如下:
附上源码地址:
https://github.com/shineflower/NeteaseNews.git