Android tab导航的几种方法:ActionBar tab +fragment,Viewpager+pagerTitleStrip,开源框架ViewPageIndicator 和 ViewPag

 

action来实现tab标签 并跟fragment结合 由于要写新闻客户端这个tab导航是必须的 这里我写几个小练习,但愿你们融会贯通.

 

1actionbar设置tab +fragment

布局是个layout 什么layout均可以 加个Id 叫container

package com.example.demoforactionbar; import android.app.ActionBar; import android.app.Activity; import android.app.Fragment; import android.app.FragmentTransaction; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; public class MainActivity extends Activity implements ActionBar.TabListener { private static final String SELECTED_ITEM = "selected_item"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final ActionBar actionBar = getActionBar(); // 设置ActionBar的导航方式：Tab导航
 actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // 依次添加三个Tab页，并为三个Tab标签添加事件监听器
        actionBar.addTab(actionBar.newTab().setText("第一页") .setTabListener(this)); actionBar.addTab(actionBar.newTab().setText("第二页") .setTabListener(this)); actionBar.addTab(actionBar.newTab().setText("第三页") .setTabListener(this)); } @Override public void onRestoreInstanceState(Bundle savedInstanceState) { if (savedInstanceState.containsKey(SELECTED_ITEM)) { // 选中前面保存的索引对应的Fragment页
 getActionBar().setSelectedNavigationItem( savedInstanceState.getInt(SELECTED_ITEM)); } } @Override public void onSaveInstanceState(Bundle outState) { // 将当前选中的Fragment页的索引保存到Bundle中
 outState.putInt(SELECTED_ITEM, getActionBar().getSelectedNavigationIndex()); } @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) { // 建立一个新的Fragment对象
        Fragment fragment = new DummyFragment(); // 建立一个Bundle对象，用于向Fragment传入参数
        Bundle args = new Bundle(); args.putInt(DummyFragment.ARG_SECTION_NUMBER, tab.getPosition() + 1); // 向fragment传入参数
 fragment.setArguments(args); // 获取FragmentTransaction对象
        FragmentTransaction ft = getFragmentManager() .beginTransaction(); // 使用fragment代替该Activity中的container组件
 ft.replace(R.id.container, fragment); // 提交事务
 ft.commit(); } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } }

 

fragment

 

package com.example.demoforactionbar; import android.app.Fragment; import android.os.Bundle; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; 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); // 获取建立该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; } }

 

2 .Viewpager + pagerTopStrip

 

 

 

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:textColor="#fff" android:paddingTop="4dp" android:paddingBottom="4dp" />
</android.support.v4.view.ViewPager>

 

 

MainActivity:

package com.example.demoforactionbar; import android.app.ActionBar; import android.app.Activity; 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; import android.view.Menu; import android.view.MenuItem; public class MainActivity extends FragmentActivity implements ActionBar.TabListener { ViewPager viewPager; ActionBar actionBar; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 获取ActionBar对象
        actionBar = getActionBar(); // 获取ViewPager
        viewPager = (ViewPager) findViewById(R.id.pager); // 建立一个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代表该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一个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对象所包含的所有Fragment // 每一个Fragment对应建立一个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); // ① // 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()); // ②
 } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } }

 

DummyFragment 父类的包改为V4包下的便可 不改会出错的

public class DummyFragment extends android.support.v4.app.Fragment

 

 

3 开源框架ViewPageIndicator 和 ViewPager 

框架本身搜索. 方法和第二很像 .

 

XML

 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#C5DAED" android:orientation="vertical" >

    <include layout="@layout/top" />

    <com.viewpagerindicator.TabPageIndicator android:id="@+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/id_viewpager" android:layout_width="match_parent" android:layout_height="match_parent" >
    </android.support.v4.view.ViewPager>

</LinearLayout>

 

MainActivity:

import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.view.ViewPager; import android.view.Window; import com.viewpagerindicator.TabPageIndicator; public class MainActivity extends FragmentActivity { private ViewPager mViewPager; private TabPageIndicator mTabPageIndicator; private TabAdapter mAdapter ; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); initView(); } private void initView() { //初始化控件 
        mViewPager = (ViewPager) findViewById(R.id.id_viewpager); mTabPageIndicator = (TabPageIndicator) findViewById(R.id.id_indicator); mAdapter = new TabAdapter(getSupportFragmentManager()); mViewPager.setAdapter(mAdapter); mTabPageIndicator.setViewPager(mViewPager, 0); //给mTabPageIndicator 设置ViewPager ,参数 0是初始化位置
 } }

 

Adapter:

import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; public class TabAdapter extends FragmentPagerAdapter { public static String[] TITLES = new String[] {"ACE", "1", "2", "3", "4", "5" }; public TabAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int arg0) { TabFragment fragment = new TabFragment(arg0); return fragment; } @Override public int getCount() { return TITLES.length; } @Override public CharSequence getPageTitle(int position) { return TITLES[position]; } }

 

 

TabFragment

 

public class TabFragment extends Fragment { private int pos; public TabFragment(int pos) { this.pos = pos; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.frag, container, false); TextView tv = (TextView) view.findViewById(R.id.id_tv); tv.setText(TabAdapter.TITLES[pos]); return view; } }

 

Fragmen布局 frag.xml

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="#ffffff" android:layout_height="match_parent" >

    <TextView android:id="@+id/id_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:textStyle="bold" android:textSize="22sp" android:text="hello ACE" />

</RelativeLayout>