本文介绍了如何解决 viewpager :指定的孩子已经有一个父母.您必须先在孩子的父母上调用 removeView()的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的项目中，我使用 viewpager 和三个名为 History、Main、Map 的选项卡.Main 活动包含计时器，秒表等.地图 显示谷歌地图.现在进入 History，我只使用简单的 Textview.
Into my project I am using viewpager with three tabs named History,Main,Map.Main activity contain Timer,stopwatch,etc. Map display the google map. and into History right now I am using only simple Textview.
Viewpager 流向:History - Main - Map
Viewpager flow direction : History - Main - Map
我将 Main 设置为当前项目(默认显示 Main 标记).现在当我从 Main > Map 和 Map 滑动时> Main 完美运行.但是当从 Main > History 滑动时没有错误，而是从 History 返回到 Main( History > Main) eclipse 给我这样的错误:
I set the Main as the current item(Bydefault Main tag display).Now when I am swipe from Main > Map and Map > Main its working perfect. but when swipe from Main > History there is no error but back return from History to Main( History > Main) eclipse give me error like :
E/AndroidRuntime( 533): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
仅供参考，我正在使用 intent 进入地图活动.请检查以下代码.请告诉我如何解决我的问题.
And FYI I am using intent into Map Activity.Please check below code.Please let me know how can solve my problem.
ViewPager 类:
@Override
public Fragment getItem(int position) {
// return SwipeyTabFragment.newInstance(TITLES[position]);
Fragment f = new Fragment();
switch (position) {
case 0:
f = History.newInstance(position);
break;
case 1:
f = Main.newInstance(position);
break;
case 2:
f = Map.newInstance(position);
break;
}
return f;
}
History.class:
public class History extends Fragment {
public static Fragment newInstance(int position) {
History f = new History();
Bundle args = new Bundle();
args.putInt("title", position);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.history, null);
( (TextView) root.findViewById(R.id.text)).setText("Hello");
return root;
}
}
主类:
public class Main extends Fragment implements GPSCallback {
......
public static Fragment newInstance(int position) {
Main f = new Main();
Bundle args = new Bundle();
args.putInt("title", position);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final ViewGroup root = (ViewGroup) inflater
.inflate(R.layout.main, null);
.......
return root;
}
........
}
地图类:
public class Map extends Fragment {
private static final String KEY_STATE_BUNDLE = "localActivityManagerState";
private LocalActivityManager mLocalActivityManager;
protected LocalActivityManager getLocalActivityManager() {
return mLocalActivityManager;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle state = null;
if (savedInstanceState != null) {
state = savedInstanceState.getBundle(KEY_STATE_BUNDLE);
}
mLocalActivityManager = new LocalActivityManager(getActivity(), true);
mLocalActivityManager.dispatchCreate(state);
}
public static Fragment newInstance(int position) {
Map f = new Map();
Bundle args = new Bundle();
args.putInt("title", position);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Intent i = new Intent(getActivity(), MapViewActivity.class);
// Intent i = new Intent(getActivity(), hellogooglemap.class);
Window w = mLocalActivityManager.startActivity("tag", i);
View currentView=w.getDecorView();
currentView.setVisibility(View.VISIBLE);
currentView.setFocusableInTouchMode(true);
((ViewGroup) currentView).setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
return currentView;
/*ViewGroup root = (ViewGroup) inflater.inflate(R.layout.history, null);
( (TextView) root.findViewById(R.id.text)).setText("Hello");
return root;*/
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBundle(KEY_STATE_BUNDLE,
mLocalActivityManager.saveInstanceState());
}
@Override
public void onResume() {
super.onResume();
mLocalActivityManager.dispatchResume();
}
@Override
public void onPause() {
super.onPause();
mLocalActivityManager.dispatchPause(getActivity().isFinishing());
}
@Override
public void onStop() {
super.onStop();
mLocalActivityManager.dispatchStop();
}
@Override
public void onDestroy() {
super.onDestroy();
mLocalActivityManager.dispatchDestroy(getActivity().isFinishing());
}
}
Logcat:
E/AndroidRuntime( 533): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
E/AndroidRuntime( 533): at android.view.ViewGroup.addViewInner(ViewGroup.java:1976)
E/AndroidRuntime( 533): at android.view.ViewGroup.addView(ViewGroup.java:1871)
E/AndroidRuntime( 533): at android.view.ViewGroup.addView(ViewGroup.java:1828)
E/AndroidRuntime( 533): at android.view.ViewGroup.addView(ViewGroup.java:1808)
E/AndroidRuntime( 533): at android.support.v4.app.NoSaveStateFrameLayout.wrap(NoSaveStateFrameLayout.java:40)
E/AndroidRuntime( 533): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:874)
E/AndroidRuntime( 533): at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1240)
E/AndroidRuntime( 533): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:612)
E/AndroidRuntime( 533): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1416)
E/AndroidRuntime( 533): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:431)
E/AndroidRuntime( 533): at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:139)
E/AndroidRuntime( 533): at android.support.v4.view.ViewPager.populate(ViewPager.java:804)
E/AndroidRuntime( 533): at android.support.v4.view.ViewPager.completeScroll(ViewPager.java:1280)
E/AndroidRuntime( 533): at android.support.v4.view.ViewPager.computeScroll(ViewPager.java:1176)
E/AndroidRuntime( 533): at android.view.ViewGroup.drawChild(ViewGroup.java:1562)
E/AndroidRuntime( 533): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
E/AndroidRuntime( 533): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
E/AndroidRuntime( 533): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
E/AndroidRuntime( 533): at android.view.View.draw(View.java:6883)
E/AndroidRuntime( 533): at android.widget.FrameLayout.draw(FrameLayout.java:357)
E/AndroidRuntime( 533): at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
E/AndroidRuntime( 533): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
E/AndroidRuntime( 533): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
E/AndroidRuntime( 533): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
E/AndroidRuntime( 533): at android.view.View.draw(View.java:6883)
E/AndroidRuntime( 533): at android.widget.FrameLayout.draw(FrameLayout.java:357)
E/AndroidRuntime( 533): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1862)
E/AndroidRuntime( 533): at android.view.ViewRoot.draw(ViewRoot.java:1522)
E/AndroidRuntime( 533): at android.view.ViewRoot.performTraversals(ViewRoot.java:1258)
E/AndroidRuntime( 533): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
E/AndroidRuntime( 533): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 533): at android.os.Looper.loop(Looper.java:130)
E/AndroidRuntime( 533): at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime( 533): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 533): at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime( 533): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
E/AndroidRuntime( 533): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
E/AndroidRuntime( 533): at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager( 68): Force finishing activity com.android.gps/.viewpager.SwipeyTabsSampleActivity
W/ActivityManager( 68): Activity pause timeout for HistoryRecord{40716740 com.android.gps/.viewpager.SwipeyTabsSampleActivity}
谢谢.
没有意图进入地图活动它可以工作 pwrfect.我的意思是当我使用与历史相同的地图时，没有任何错误.
Without intent into Map activity it works pwrfect.I mean when i am using same as history into map there is no any error.
推荐答案
我也遇到过这个问题.
你可以通过添加单行来解决它 mViewPager.setOffscreenPageLimit(3);
You can solve it by just add single line mViewPager.setOffscreenPageLimit(3);
public class SwipeyTabsSampleActivity extends FragmentActivity {
...
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mViewPager = (ViewPager) findViewById(R.id.viewpager);
mTabs = (SwipeyTabs) findViewById(R.id.swipeytabs);
SwipeyTabsPagerAdapter adapter = new SwipeyTabsPagerAdapter(this,
getSupportFragmentManager());
mViewPager.setAdapter(adapter);
mViewPager.setOffscreenPageLimit(3); <------ Add this one
}
}
祝你好运.
这篇关于如何解决 viewpager :指定的孩子已经有一个父母.您必须先在孩子的父母上调用 removeView()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！