FragmentTabhost关于v4兼容包在18+报bug No tab content FrameLayout found for id xxx

FragmentTabhost关于v4兼容包在18+报bug No tab content FrameLayout found for id xxx

大半夜了，这个问题终于解决了，相信很多人都用过FragmentTabHost写过类似于微信啥的那种，如果的你的v4兼容包是在版本18以前的，你的布局写成这样

"http://schemas.android.com/apk/res/android"


    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

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

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


            "@android:id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:background="#FFF1F1F1"/>

            "@android:id/tabcontent"
                android:layout_width="0dp"
                android:layout_height="0dp"
                android:layout_weight="0"/>



        .support.v4.app.FragmentTabHost>

不会有任何问题，但是如果你的v4包版本在18以上（这里我指的不包括18），就会报一个No tab content FrameLayout found for id xxx的错误，这个异常在v4包的FragmentTabHost中，是这个部分：

private void ensureContent() {
        if (mRealTabContent == null) {
            mRealTabContent = (FrameLayout)findViewById(mContainerId);
            if (mRealTabContent == null) {
                throw new IllegalStateException(
                        "No tab content FrameLayout found for id " + mContainerId);
            }
        }
    }

但是新旧版的代码都有这个方法，Google了一下基本都说替换v4包，我说tm这尼玛也叫解决方法，果断stackoverflow泡了一会，无果，又撸了一会FragmentTabHost的代码，貌似区别在这里

 private void initFragmentTabHost(Context context, AttributeSet attrs) {
        TypedArray a = context.obtainStyledAttributes(attrs,
                new int[] { android.R.attr.inflatedId }, 0, 0);
        mContainerId = a.getResourceId(0, 0);
        a.recycle();

        super.setOnTabChangedListener(this);
    }

    private void ensureHierarchy(Context context) {
        // If owner hasn't made its own view hierarchy, then as a convenience
        // we will construct a standard one here.
        if (findViewById(android.R.id.tabs) == null) {
            LinearLayout ll = new LinearLayout(context);
            ll.setOrientation(LinearLayout.VERTICAL);
            addView(ll, new FrameLayout.LayoutParams(
                    ViewGroup.LayoutParams.FILL_PARENT,
                    ViewGroup.LayoutParams.FILL_PARENT));

            TabWidget tw = new TabWidget(context);
            tw.setId(android.R.id.tabs);
            tw.setOrientation(TabWidget.HORIZONTAL);
            ll.addView(tw, new LinearLayout.LayoutParams(
                    ViewGroup.LayoutParams.FILL_PARENT,
                    ViewGroup.LayoutParams.WRAP_CONTENT, 0));

private void ensureHierarchy(Context context) {在原有代码上抽出来一个方法，但是并没想到什么头绪，我还真用了替换v4包的方法，换到了旧的18版本，结果到了今天添加一个github码的时候发现gg了，人家用的版本22，这个棘手的问题又得面对了；Google的时候无意间看见了一个说FragmentTabHost的bug，但是还不是很明白、大意就是顺序的问题，结果机智了一下、又stackoverflow，还真找到了，
stackoverflow地址问题在布局上面！上码：

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

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

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

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="0"
            android:orientation="horizontal" />
    LinearLayout>
    android.support.v4.app.FragmentTabHost>

我的Java码是这样写的：

package com.wxh.chattest;

import android.os.Bundle;
import android.support.v4.app.FragmentTabHost;
import android.widget.TabHost;

import com.wxh.chattest.base.BaseActivity;
import com.wxh.chattest.fragment.MemberFragment;
import com.wxh.chattest.fragment.MyFragment;
import com.wxh.chattest.widget.TabIndicatorView;

public class MainActivity extends BaseActivity implements TabHost.OnTabChangeListener {
    private static final String TAG_MAIN = "main";
    private static final String TAG_FRIEND = "friend";
    private static final String TAG_LOG = "log";
    private static final String TAG_ME = "me";
    private FragmentTabHost tabHost;
    private TabIndicatorView MainIndicators;
    private TabIndicatorView FriendIndicators;
    private TabIndicatorView LogIndicators;
    private TabIndicatorView MeIndicators;

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

    }

    private void init() {
        //初始化tabhost
        tabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
        tabHost.setup(this, getSupportFragmentManager(), R.id.activity_main_container);



        //添加tabspec
        TabHost.TabSpec spec = tabHost.newTabSpec(TAG_MAIN);
        MainIndicators = new TabIndicatorView(this);

        MainIndicators.setTabIcon(R.drawable.tab_icon_chat_normal, R.drawable.tab_icon_chat_focus);
        MainIndicators.setTabTitle("主页");
        spec.setIndicator(MainIndicators);
        //添加tab
        tabHost.addTab(spec, MyFragment.class, null);

        //添加tabspec
        spec = tabHost.newTabSpec(TAG_FRIEND);
        FriendIndicators = new TabIndicatorView(this);

        FriendIndicators.setTabIcon(R.drawable.tab_icon_chat_normal, R.drawable.tab_icon_chat_focus);
        FriendIndicators.setTabTitle("朋友");
        spec.setIndicator(FriendIndicators);
        //添加tab
        tabHost.addTab(spec, MyFragment.class, null);


        //添加tabspec
        spec = tabHost.newTabSpec(TAG_LOG);
        LogIndicators = new TabIndicatorView(this);

        LogIndicators.setTabIcon(R.drawable.tab_icon_chat_normal, R.drawable.tab_icon_chat_focus);
        LogIndicators.setTabTitle("日志");
        spec.setIndicator(LogIndicators);
        //添加tab
        tabHost.addTab(spec, MyFragment.class, null);

        //添加tabspec
        spec = tabHost.newTabSpec(TAG_ME);
        MeIndicators = new TabIndicatorView(this);

        MeIndicators.setTabIcon(R.drawable.tab_icon_chat_normal, R.drawable.tab_icon_chat_focus);
        MeIndicators.setTabTitle("我的");
        spec.setIndicator(MeIndicators);
        //添加tab
        tabHost.addTab(spec,MemberFragment.class, null);

        //去白线
        tabHost.getTabWidget().setDividerDrawable(android.R.color.white);
        //监听
        tabHost.setCurrentTabByTag(TAG_MAIN);
        MainIndicators.setTabSelected(true);
        tabHost.setOnTabChangedListener(this);
    }


    @Override
    public void onTabChanged(String tag) {
        MainIndicators.setTabSelected(false);
        FriendIndicators.setTabSelected(false);
        LogIndicators.setTabSelected(false);
        MeIndicators.setTabSelected(false);
        if (TAG_MAIN.equals(tag)) {
            MainIndicators.setTabSelected(true);
        } else if (TAG_FRIEND.equals(tag)) {
            FriendIndicators.setTabSelected(true);
        } else if (TAG_LOG.equals(tag)) {
            LogIndicators.setTabSelected(true);
        } else if (TAG_ME.equals(tag)) {
            MeIndicators.setTabSelected(true);
        }
    }
}

TabIndicatorView是我自定义的一个组合式控件