下面是我正在使用选项卡布局的片段活动的代码。代码似乎工作得很好，但从没有开始给出异常。我已经在两个片段中检查了我的视图，但我找不到任何错误。
package com.test.tabwithfragment;
import java.util.HashMap;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.widget.TabHost;
import android.widget.TabHost.TabContentFactory;
public class MainActivity extends FragmentActivity implements TabHost.OnTabChangeListener {
private TabHost mTabHost;
private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, TabInfo>();
private TabInfo mLastTab = null;
private class TabInfo {
private String tag;
private Class<?> clss;
private Bundle args;
private Fragment fragment;
TabInfo(String tag, Class<?> clazz, Bundle args) {
this.tag = tag;
this.clss = clazz;
this.args = args;
}
}
class TabFactory implements TabContentFactory {
private final Context mContext;
public TabFactory(Context context) {
mContext = context;
}
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initialiseTabHost(savedInstanceState);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); //set the tab as per the saved state
}
}
protected void onSaveInstanceState(Bundle outState) {
outState.putString("tab", mTabHost.getCurrentTabTag()); //save the tab selected
super.onSaveInstanceState(outState);
}
private void initialiseTabHost(Bundle args) {
mTabHost = (TabHost)findViewById(android.R.id.tabhost);
mTabHost.setup();
TabInfo tabInfo = null;
/* MainActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Tab 1"), ( tabInfo = new TabInfo("Tab1", FragmentOne.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);*/
MainActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Tab 2"), ( tabInfo = new TabInfo("Tab2", FragmentTwo.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
MainActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab 3"), ( tabInfo = new TabInfo("Tab3", FragmentTwo.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
this.onTabChanged("Tab1");
//
mTabHost.setOnTabChangedListener(this);
}
private static void addTab(MainActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) {
tabSpec.setContent(activity.new TabFactory(activity));
String tag = tabSpec.getTag();
tabInfo.fragment = activity.getSupportFragmentManager().findFragmentByTag(tag);
if (tabInfo.fragment != null && !tabInfo.fragment.isDetached()) {
FragmentTransaction ft = activity.getSupportFragmentManager().beginTransaction();
ft.detach(tabInfo.fragment);
ft.commit();
activity.getSupportFragmentManager().executePendingTransactions();
}
tabHost.addTab(tabSpec);
}
public void onTabChanged(String tag) {
TabInfo newTab = this.mapTabInfo.get(tag);
if (mLastTab != newTab) {
FragmentTransaction ft = this.getSupportFragmentManager().beginTransaction();
if (mLastTab != null) {
if (mLastTab.fragment != null) {
ft.detach(mLastTab.fragment);
}
}
if (newTab != null) {
if (newTab.fragment == null) {
newTab.fragment = Fragment.instantiate(this,
newTab.clss.getName(), newTab.args);
ft.add(R.id.realtabcontent, newTab.fragment, newTab.tag);
} else {
ft.attach(newTab.fragment);
}
}
mLastTab = newTab;
ft.commit();
this.getSupportFragmentManager().executePendingTransactions();
}
}
}
这是我的 logcat 的副本-
06-07 17:19:06.691: E/AndroidRuntime(13410): FATAL EXCEPTION: main
06-07 17:19:06.691: E/AndroidRuntime(13410): java.lang.IllegalArgumentException: No view found for id 0x7f080000 (com.test.tabwithfragment:id/realtabcontent) for fragment FragmentTwo{419aca50 #0 id=0x7f080000 Tab3}
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:903)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:461)
06-07 17:19:06.691: E/AndroidRuntime(13410): at com.test.tabwithfragment.MainActivity.onTabChanged(MainActivity.java:115)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.widget.TabHost.invokeOnTabChangeListener(TabHost.java:391)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.widget.TabHost.setCurrentTab(TabHost.java:376)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:150)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:548)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.view.View.performClick(View.java:4110)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.view.View$PerformClick.run(View.java:17001)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.os.Handler.handleCallback(Handler.java:615)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.os.Handler.dispatchMessage(Handler.java:92)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.os.Looper.loop(Looper.java:137)
06-07 17:19:06.691: E/AndroidRuntime(13410): at android.app.ActivityThread.main(ActivityThread.java:4854)
06-07 17:19:06.691: E/AndroidRuntime(13410): at java.lang.reflect.Method.invokeNative(Native Method)
06-07 17:19:06.691: E/AndroidRuntime(13410): at java.lang.reflect.Method.invoke(Method.java:511)
06-07 17:19:06.691: E/AndroidRuntime(13410): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
06-07 17:19:06.691: E/AndroidRuntime(13410): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
06-07 17:19:06.691: E/AndroidRuntime(13410): at dalvik.system.NativeStart.main(Native Method)
更新
我的xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TabHost
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TabWidget
android:id="@android:id/tabs"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
/>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"/>
<FrameLayout
android:id="@+android:id/realtabcontent"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>
</TabHost>
</LinearLayout>