ViewPageIndicator--仿网易的使用

仿微信(网易的界面)

第一步: AndroidManifest.xml 的配置

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.viewpageindicator"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="16" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/StyledIndicators" >   //定义了 一些样式
        <activity
            android:name="com.example.viewpageindicator.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

　　样式

  <style name="StyledIndicators" parent="@android:style/Theme.Light">
        <item name="vpiTabPageIndicatorStyle">@style/CustomTabPageIndicator</item>
    </style>

    <style name="CustomTabPageIndicator" parent="Widget.TabPageIndicator"> // 继承liberary下样式, 重写一些样式
        <item name="android:background">@drawable/tab_indicator</item>    // 标题的颜色 ,和指示器
        <item name="android:textAppearance">@style/CustomTabPageIndicator.Text</item>  
        <item name="android:textSize">14sp</item>
        <item name="android:dividerPadding">8dp</item>
        <item name="android:showDividers">middle</item>
        <item name="android:paddingLeft">10dp</item>
        <item name="android:paddingRight">10dp</item>
        <item name="android:fadingEdge">horizontal</item>
        <item name="android:fadingEdgeLength">8dp</item>
    </style>

    <style name="CustomTabPageIndicator.Text" parent="android:TextAppearance.Medium">
        <item name="android:typeface">monospace</item>
        <item name="android:textColor">@drawable/selector_tabtext</item>  //  选择器
    </style>

　　选择器selector_tabtext.xml  和tab_indicator.xml

     

<?xml version="1.0" encoding="utf-8"?>  //selector_tabtext
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:color="#EE2C2C" />
    <item android:state_pressed="true" android:color="#EE2C2C" />
    <item android:state_focused="true" android:color="#EE2C2C" />
    <item android:color="@android:color/black"/>
</selector> 

<selector xmlns:android="http://schemas.android.com/apk/res/android"> //tab_indicator
    <item android:state_selected="false" android:state_pressed="false" android:drawable="@android:color/transparent" />
    <item android:state_selected="false" android:state_pressed="true" android:drawable="@android:color/transparent" />     
    <item android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/base_tabpager_indicator_selected" />
    <item android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/base_tabpager_indicator_selected" />
</selector>

第二步 :class MainActivity extends FragmentActivity

/**
     * Tab标题
     */
    private static final String[] TITLE = new String[] { "头条", "房产", "另一面"
                                                         };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        //ViewPager的adapter
        FragmentPagerAdapter adapter = new TabPageIndicatorAdapter(getSupportFragmentManager());
        ViewPager pager = (ViewPager)findViewById(R.id.pager);
        pager.setAdapter(adapter);   //viewpage设置值

        //实例化TabPageIndicator然后设置ViewPager与之关联
        TabPageIndicator indicator = (TabPageIndicator)findViewById(R.id.indicator);
        indicator.setViewPager(pager);  //下标 绑定 page
        
        //如果我们要对ViewPager设置监听，用indicator设置就行了
        indicator.setOnPageChangeListener(new OnPageChangeListener() {
            
            @Override
            public void onPageSelected(int arg0) {
                Toast.makeText(getApplicationContext(), TITLE[arg0], Toast.LENGTH_SHORT).show();
            }
            
            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                
            }
            
            @Override
            public void onPageScrollStateChanged(int arg0) {
                
            }
        });
        
    }

    
    /**
     * ViewPager适配器
     * @author len
     *
     */
    class TabPageIndicatorAdapter extends FragmentPagerAdapter {
        public TabPageIndicatorAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            //新建一个Fragment来展示ViewPager item的内容，并传递参数
            Fragment fragment = new  ItemFragment();  
            Bundle args = new Bundle();  
            args.putString("arg", TITLE[position]);  
            fragment.setArguments(args);  
            
            return fragment;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return TITLE[position%TITLE.length ];   // 取数组里面的值 最为title
        }

        @Override
        public int getCount() {
            return TITLE.length;
        }
    }

Fragment

public class ItemFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        
        View contextView = inflater.inflate(R.layout.fragment_item, container, false);
        
       
        TextView mTextView = (TextView) contextView.findViewById(R.id.textview);
        
        //获取Activity传递过来的参数
        Bundle mBundle = getArguments();
        String title = mBundle.getString("arg");
        mTextView.setText(title);    
        return contextView;
    }
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }

}