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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <FrameLayout        android:id="@+id/activity_main_container"        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">            <TabWidget                android:id="@android:id/tabs"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:background="#FFF1F1F1"/>            <FrameLayout                android:id="@android:id/tabcontent"                android:layout_width="0dp"                android:layout_height="0dp"                android:layout_weight="0"/>        </android.support.v4.app.FragmentTabHost></LinearLayout>

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