FragmentTabhost学习笔记

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首先看下官方解释：

Special TabHost that allows the use of Fragment objects for its tab content. When placing this in a view hierarchy, after inflating the hierarchy you must call setup(Context, FragmentManager, int) to complete the initialization of the tab host.

Here is a simple example of using a FragmentTabHost in an Activity:

import com.example.android.supportv4.R;import android.os.Bundle;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentTabHost;/** * This demonstrates how you can implement switching between the tabs of a * TabHost through fragments, using FragmentTabHost. */public class FragmentTabs extends FragmentActivity {    private FragmentTabHost mTabHost;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.fragment_tabs);        mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);        mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);        mTabHost.addTab(mTabHost.newTabSpec("simple").setIndicator("Simple"),                FragmentStackSupport.CountingFragment.class, null);        mTabHost.addTab(mTabHost.newTabSpec("contacts").setIndicator("Contacts"),                LoaderCursorSupport.CursorLoaderListFragment.class, null);        mTabHost.addTab(mTabHost.newTabSpec("custom").setIndicator("Custom"),                LoaderCustomSupport.AppListFragment.class, null);        mTabHost.addTab(mTabHost.newTabSpec("throttle").setIndicator("Throttle"),                LoaderThrottleSupport.ThrottledLoaderListFragment.class, null);    }}

看到这里的时候我有一个地方么有看明白：

public void setup (Context context, FragmentManager manager, int containerId)

containerId我的理解是“存放的页面内容ID” 请看layout.xml文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <!-- 存放页面内容 -->    <FrameLayout        android:id="@+id/realtabcontent"        android:layout_width="fill_parent"        android:layout_height="0dip"        android:layout_weight="1" />    <!-- 底层菜单 -->    <android.support.v4.app.FragmentTabHost        android:id="@android:id/tabhost"        android:layout_width="fill_parent"        android:layout_height="wrap_content"         android:background="@drawable/mainfragmenttabs_bottombar">        <FrameLayout            android:id="@android:id/tabcontent"            android:layout_width="0dp"            android:layout_height="0dp"            android:layout_weight="0" />                </android.support.v4.app.FragmentTabHost></LinearLayout>

参考学习：http://blog.csdn.net/xiaoyuan511/article/details/24882979

http://www.jianshu.com/p/3b0ff7a4bde1

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