fragmenttabhost 也是先简单记一下，以后再改

<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:orientation="vertical" >

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

    <android.support.v4.app.FragmentTabHost
        android:id="@android:id/tabhost"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/maintab_toolbar_bg" >
        
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="0dp"
            android:layout_height="0dp" />
    </android.support.v4.app.FragmentTabHost>

</LinearLayout>
听说第二个framelayout不用不行，可能会不兼容4.0之前的。暂时还没有测试。tabwidget好像是封装到fragmenttabhost里面了，源码也还没有看。

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.TabHost.OnTabChangeListener;
import android.widget.TextView;

public class MainActivityb1 extends FragmentActivity {

private FragmentTabHost tabHost;

// 定义数组保存fragment
private Class[] fragmentArray = { Fragment1.class, Fragment2.class, Fragment3.class, Fragment4.class,
Fragment5.class };

private int mImageViewArray[] = { R.drawable.tab_home_btn, R.drawable.tab_msg_btn, R.drawable.tab_selfinfo_btn,
R.drawable.tab_square_btn, R.drawable.tab_more_btn };

private String textviewArray[] = { "首页", "消息", "好友", "广场", "更多" };

private LayoutInflater inflater;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_b1);
inflater = LayoutInflater.from(this);

tabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);

tabHost.setup(this, getSupportFragmentManager(), R.id.realTabContent);

for (int i = 0; i < textviewArray.length; i++) {
tabHost.addTab(tabHost.newTabSpec(textviewArray[i]).setIndicator(getImageView(i)), fragmentArray[i], null);
tabHost.getTabWidget().getChildAt(i).setBackgroundResource(R.drawable.selector_tab_bg);
}

tabHost.setOnTabChangedListener(new OnTabChangeListener() {

@Override
public void onTabChanged(String tabId) {
//有这么个方法
}
});

}

private View getImageView(int index) {
View view = inflater.inflate(R.layout.item_fragmenttabhost, null);
ImageView item_iv = (ImageView) view.findViewById(R.id.item_iv);
TextView item_tv = (TextView) view.findViewById(R.id.item_tv);

item_iv.setImageResource(mImageViewArray[index]);
item_tv.setText(textviewArray[index]);

return view;

}

}

备注：fragment需要自己创建（v4包下）。
注意：需要继承fragmentactivity（v4包下）