我已经创建了一个Tab栏，我已经锁定了横向模式，并且工作正常，但是我已经修改了纵向/横向模式的程序，并且在旋转手机时我收到了异常。 这是MainActivity中的代码。
protected void onCreate(Bundle savedInstanceState) {
Log.d(TAG, "MainActivity.onCreate");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
appContext = this.getBaseContext();
jsonIng = new String();
jsonRct = new String();
// progressBarHandler = new Handler();
rct = new Ricetta();
final ActionBar actionBar = getActionBar();
// actionBar.setHomeButtonEnabled(false);
// actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// actionBar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
mViewPager = new ViewPager(this);
mViewPager = (ViewPager) findViewById(R.id.pager);
setContentView(mViewPager);
mTabsAdapter = new TabsAdapter(this, mViewPager);
mTabsAdapter.addTab(actionBar.newTab()
.setText(R.string.title_section1)
.setIcon(R.drawable.ic_menu_agenda),
Page1.class, null);
mTabsAdapter.addTab(actionBar.newTab()
.setText(R.string.title_section2)
.setIcon(R.drawable.ic_menu_show_list),
Page2.class, null);
mTabsAdapter.addTab(actionBar.newTab()
.setText(R.string.title_section3)
.setIcon(R.drawable.ic_menu_show_list),
Page3.class, null);
mTabsAdapter.addTab(actionBar.newTab()
.setText(R.string.title_section4)
.setIcon(R.drawable.compare48x48),
Page4.class, null);
mTabsAdapter.addTab(actionBar.newTab()
.setText(R.string.title_section5)
.setIcon(R.drawable.ic_menu_allfriends),
Page5.class, null);
if (savedInstanceState != null) {
actionBar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
}
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
... ...
这是LOG：
07-04 19:25:19.693: I/Pagina1(1717): On Pause .....
07-04 19:25:19.693: I/Pagina4(1717): On Pause .....
07-04 19:25:19.697: I/Pagina1(1717): On Stop .....
07-04 19:25:19.697: I/Pagina4(1717): On Stop .....
07-04 19:25:19.697: I/Pagina1(1717): On Destroy .....
07-04 19:25:19.697: I/Pagina4(1717): On Destroy .....
07-04 19:25:19.749: D/MainActivity(1717): MainActivity.onCreate
07-04 19:25:19.869: D/dalvikvm(1717): GC_FOR_ALLOC freed 4444K, 25% free 14284K/18896K, paused 34ms, total 35ms
07-04 19:25:19.881: D/AndroidRuntime(1717): Shutting down VM
07-04 19:25:19.881: W/dalvikvm(1717): threadid=1: thread exiting with uncaught exception (group=0xa4c23648)
07-04 19:25:19.885: E/AndroidRuntime(1717): FATAL EXCEPTION: main
07-04 19:25:19.885: E/AndroidRuntime(1717): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bandweb.myrecipescreator/com.bandweb.myrecipescreator.MainActivity}: java.lang.IllegalStateException: setSelectedNavigationIndex not valid for current navigation mode
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3740)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.ActivityThread.access$700(ActivityThread.java:141)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.os.Handler.dispatchMessage(Handler.java:99)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.os.Looper.loop(Looper.java:137)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.ActivityThread.main(ActivityThread.java:5103)
07-04 19:25:19.885: E/AndroidRuntime(1717): at java.lang.reflect.Method.invokeNative(Native Method)
07-04 19:25:19.885: E/AndroidRuntime(1717): at java.lang.reflect.Method.invoke(Method.java:525)
07-04 19:25:19.885: E/AndroidRuntime(1717): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
07-04 19:25:19.885: E/AndroidRuntime(1717): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-04 19:25:19.885: E/AndroidRuntime(1717): at dalvik.system.NativeStart.main(Native Method)
07-04 19:25:19.885: E/AndroidRuntime(1717): Caused by: java.lang.IllegalStateException: setSelectedNavigationIndex not valid for current navigation mode
07-04 19:25:19.885: E/AndroidRuntime(1717): at com.android.internal.app.ActionBarImpl.setSelectedNavigationItem(ActionBarImpl.java:364)
07-04 19:25:19.885: E/AndroidRuntime(1717): at com.bandweb.myrecipescreator.MainActivity.onCreate(MainActivity.java:390)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.Activity.performCreate(Activity.java:5133)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
07-04 19:25:19.885: E/AndroidRuntime(1717): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
编辑更新
public static class TabsAdapter extends FragmentPagerAdapter
implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
private final Context mContext;
private final ActionBar mActionBar;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo {
private final Class<?> clss;
private final Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
public TabsAdapter(FragmentActivity activity, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mActionBar = activity.getActionBar();
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
TabInfo info = new TabInfo(clss, args);
tab.setTag(info);
tab.setTabListener(this);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
@Override
public void onPageScrollStateChanged(int state) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
// TODO Auto-generated method stub
}
@Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
mActionBar.setSelectedNavigationItem(position);
//Log.i(TAG, "onPageSelected " + ", position " + Integer.toString(position));
//Page2.listAdapter.notifyDataSetChanged();
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
Object tag = tab.getTag();
for (int i=0; i<mTabs.size(); i++) {
if (mTabs.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
@Override
public int getCount() {
return mTabs.size();
}
}
答案 0 :(得分：-1)
Caused by: java.lang.IllegalStateException: setSelectedNavigationIndex not valid for current navigation mode
这是你的问题
尝试保存当前的选择标签ID并在旋转后重新创建
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// onCreate implementation goes here
if (savedInstanceState != null) {
int selectedTabIndex = savedInstanceState.getInt("selectedTabIndex");
getActionBar().setSelectedNavigationItem(selectedTabIndex);
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("selectedTabIndex", getActionBar().getSelectedNavigationIndex());
}