Android中实现可滑动的Tab的3种方式

import java.util.Random;

import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentStatePagerAdapter;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.TabHost;import android.widget.TabHost.OnTabChangeListener;import android.widget.TabWidget;import android.widget.TextView;

import com.swordy.demo.android.R;import com.swordy.library.android.util.ELog;

/** * 1. 使用TabHost和ViewPager组合实现一个可以滑动的tab * 2. bug：如果当前页为0，则ViewPager第一次不加载。 *  * @author swordy * @email mryangjian@live.com * @since Jan 20, 2014 * @version 1.0 */public class SlideTabs1 extends FragmentActivity{    private static final String TAG = "AndroidDemos.SlideTabs1";

    private TabHost mTabHost;

    private ViewPager mViewPager;

    private PagerAdapter mPagerAdapter;

    private String[] addresses = { "first", "second", "third" };

    @Override    protected void onCreate(Bundle arg0)    {        super.onCreate(arg0);        setContentView(R.layout.fragment_slidetabs1);

        mViewPager = (ViewPager) findViewById(R.id.viewPager1);        mPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());        mViewPager.setAdapter(mPagerAdapter);

        mTabHost = (TabHost) findViewById(android.R.id.tabhost);        mTabHost.setup();        mTabHost.addTab(mTabHost.newTabSpec("one").setIndicator("one-1")                .setContent(R.id.viewPager1));        mTabHost.addTab(mTabHost.newTabSpec("two").setIndicator("two-2")                .setContent(R.id.viewPager1));        mTabHost.addTab(mTabHost.newTabSpec("three").setIndicator("three-3")                .setContent(R.id.viewPager1));

        TabWidget tabWidget = mTabHost.getTabWidget();        int count = tabWidget.getChildCount();        for (int i = 0; i != count; i++)        {            final int index = i;            tabWidget.getChildAt(i).setOnClickListener(new OnClickListener() {

                @Override                public void onClick(View v)                {                    mTabHost.setCurrentTab(index);                    mViewPager.setCurrentItem(index);                }            });        }        mTabHost.setOnTabChangedListener(new OnTabChangeListener() {

            @Override            public void onTabChanged(String tabId)            {                ELog.i(TAG, "@--> onTabChanged by tabId: " + tabId);            }        });

        mViewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override            public void onPageSelected(int arg0)            {                ELog.i(TAG, "@--> onPageSelected: " + arg0);                mTabHost.setCurrentTab(arg0);            }

            @Override            public void onPageScrolled(int arg0, float arg1, int arg2)            {

            }

            @Override            public void onPageScrollStateChanged(int arg0)            {

            }        });    }

    private class MyPagerAdapter extends FragmentStatePagerAdapter    {

        public MyPagerAdapter(FragmentManager fm)        {            super(fm);        }

        @Override        public Fragment getItem(int position)        {            ELog.i(TAG, "@--> getItem by position" + position);            ELog.i(TAG, "@--> getItem by position" + position);            return MyFragment.create(addresses[position]);        }

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

    }

    public static class MyFragment extends Fragment    {        public static MyFragment create(String address)        {            ELog.i(TAG, "@--> MyFragment.create()");            MyFragment f = new MyFragment();            Bundle b = new Bundle();            b.putString("address", address);            f.setArguments(b);            return f;        }

        @Override        public View onCreateView(LayoutInflater inflater, ViewGroup container,                Bundle savedInstanceState)        {            Random r = new Random(System.currentTimeMillis());

            Bundle b = getArguments();

            View v = inflater.inflate(R.layout.fragment_viewpager1_layout1, null);            v.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

            TextView txvAddress = (TextView) v.findViewById(R.id.textView1);            txvAddress.setTextColor(r.nextInt() >> 8 | 0xFF << 24);            txvAddress.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

            txvAddress.setText(b.getString("address", ""));            return v;        }

    }}