Android之Tab类总结

本文主要包括以下Tab类实现方式

FragmentTabHost+Fragment实现
传统的ViewPager实现
FragmentManager+Fragment实现
ViewPager+FragmentPagerAdapter实现
TabPageIndicator+ViewPager+FragmentPagerAdapter

FragmentTabHost+Fragment实现

布局文件

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:orientation="vertical">  

    <android.support.v4.app.FragmentTabHost  
        android:id="@android:id/tabhost"  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content">  

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:orientation="vertical" >

            <FrameLayout
                android:id="@android:id/tabcontent"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1" >
            </FrameLayout>

            <TabWidget
                android:id="@android:id/tabs"
                android:layout_width="match_parent"
                android:layout_height="60dip" />
        </LinearLayout> 
    </android.support.v4.app.FragmentTabHost>  

</LinearLayout>

MainActivity

package com.darna.wmxfx;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TextView;

import com.darna.wmxfx.fragment.Frg_Cart;
import com.darna.wmxfx.fragment.Frg_Index;
import com.darna.wmxfx.fragment.Frg_UserCenter;


public class MainActivity extends FragmentActivity {

    private FragmentTabHost mTabHost = null;
    private int iTabIndex = 0;
    private int[][] iTab = new int[][] { { R.drawable.indexunused, R.drawable.cartunused, R.drawable.usercenterunused },
            { R.drawable.indexused, R.drawable.cartused, R.drawable.usercenterused } };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initViews();
    }

    private void initViews(){
        String[] strTab = getResources().getStringArray(R.array.bottom_tab);
        RelativeLayout[] relativeLayout = new RelativeLayout[strTab.length];
        for(int i = 0; i < strTab.length; i++){
            if (i == 0) {
                relativeLayout[i] = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.tab_bottom, null);
                relativeLayout[i].findViewById(R.id.iv_bottom_tab).setBackgroundResource(iTab[1][i]);
                TextView tView =  (TextView) relativeLayout[i].findViewById(R.id.tv_bottom_tab);
                tView.setText(strTab[i]);
                tView.setTextColor(getResources().getColor(R.color.textused));
            }else {
                relativeLayout[i] = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.tab_bottom, null);
                relativeLayout[i].findViewById(R.id.iv_bottom_tab).setBackgroundResource(iTab[0][i]);
                TextView t =  (TextView) relativeLayout[i].findViewById(R.id.tv_bottom_tab);
                t.setText(strTab[i]);
                t.setTextColor(getResources().getColor(R.color.textunused));
            }
        }

        mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);  
        mTabHost.setup(this, getSupportFragmentManager(), android.R.id.tabcontent);

        mTabHost.addTab(mTabHost.newTabSpec(Config.KEY_INDEX)  
                .setIndicator(relativeLayout[0]), Frg_Index.class, null); 

        mTabHost.addTab(mTabHost.newTabSpec(Config.KEY_CART)  
                .setIndicator(relativeLayout[1]), Frg_Cart.class, null);

        mTabHost.addTab(mTabHost.newTabSpec(Config.KEY_USERCENTER)  
                .setIndicator(relativeLayout[2]), Frg_UserCenter.class, null);

        mTabHost.setOnTabChangedListener(new OnTabChangeListener() {

            @Override
            public void onTabChanged(String tabId) {
                // TODO Auto-generated method stub
                View v = mTabHost.getTabWidget().getChildAt(iTabIndex);
                ((ImageView) v.findViewById(R.id.iv_bottom_tab)).setBackgroundResource(iTab[0][iTabIndex]);
                ((TextView) v.findViewById(R.id.tv_bottom_tab)).setTextColor(getResources().getColor(R.color.textunused));
                v = mTabHost.getCurrentTabView();
                iTabIndex = mTabHost.getCurrentTab();
                ((ImageView) v.findViewById(R.id.iv_bottom_tab)).setBackgroundResource(iTab[1][iTabIndex]);
                ((TextView) v.findViewById(R.id.tv_bottom_tab)).setTextColor(getResources().getColor(R.color.textused));
            }
        });

    }
}