package com.example.tabhostmove;

import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;


public class MainActivity extends TabActivity {
    private TabHost tabHost;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
    }

    
    private void init() {
        // TODO Auto-generated method stub
        
        tabHost = getTabHost();
        // 页面1
        TabSpec spec1 = tabHost.newTabSpec("1");
        spec1.setIndicator("1", getResources().getDrawable(R.drawable.ic_launcher));
        Intent intent1 = new Intent(this, Activity1.class);
        spec1.setContent(intent1);

        // 页面2
        TabSpec spec2 = tabHost.newTabSpec("2");
        spec2.setIndicator("2", getResources().getDrawable(R.drawable.ic_launcher));
        Intent intent2 = new Intent(this, Activity2.class);
        spec2.setContent(intent2);

        // 页面3
        TabSpec spec3 = tabHost.newTabSpec("3");
        spec3.setIndicator("3", getResources().getDrawable(R.drawable.ic_launcher));
        Intent intent3 = new Intent(this, Activity3.class);
        spec3.setContent(intent3);
        
        // 页面4
        TabSpec spec4 = tabHost.newTabSpec("4");
        spec4.setIndicator("4", getResources().getDrawable(R.drawable.ic_launcher));
        Intent intent4 = new Intent(this, Activity4.class);
        spec4.setContent(intent4);

        tabHost.addTab(spec1);
        tabHost.addTab(spec2);
        tabHost.addTab(spec3);
        tabHost.addTab(spec4);
        
    }



    private GestureDetector detector = new GestureDetector(new GestureDetector.SimpleOnGestureListener() {

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            if ((e2.getRawX() - e1.getRawX()) > 80) {
                showNext();
                return true;
            }

            if ((e1.getRawX() - e2.getRawX()) > 80) {
                showPre();
                return true;
            }
            return super.onFling(e1, e2, velocityX, velocityY);
        }

    });


    @Override
    public boolean onTouchEvent(MotionEvent event) {
        detector.onTouchEvent(event);
        return super.onTouchEvent(event);
    }

    /**
     * 当前页面索引
     */
    int i = 0;

    /**
     * 显示下一个页面
     */
    protected void showNext() {
        // 三元表达式控制3个页面的循环.
        //tabHost.setCurrentTab(i = i == 3 ? i = 0 : ++i);
        //Log.i("kennet", i + "");
        //四个页面的下一个循环
        switch(i)
        {
        case 0:
            i++;
            tabHost.setCurrentTab(i);
            break;
        case 1:
            i++;
            tabHost.setCurrentTab(i);
            break;
        case 2:
            i++;
            tabHost.setCurrentTab(i);
            break;
        case 3:
            i=0;
            tabHost.setCurrentTab(i);
            break;

        }
    }

    /**
     * 显示前一个页面
     */
    protected void showPre() {
        // 三元表达式控制3个页面的循环.
        //tabHost.setCurrentTab(i = i == 0 ? i = 3 : --i);
        //四个页面的上一个循环
        switch(i)
        {
        case 0:
            i=3;
            tabHost.setCurrentTab(i);
            break;
        case 1:
            i--;
            tabHost.setCurrentTab(i);
            break;
        case 2:
            i--;
            tabHost.setCurrentTab(i);
            break;
        case 3:
            i--;
            tabHost.setCurrentTab(i);
            break;

        }
    }











    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />

        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1" >
        </FrameLayout>
    </LinearLayout>

</TabHost>