我想要达成的目标
- 从一个
FragmentActivity
中,在点击操作栏中的操作按钮时显示一个对话框 DialogFragment
- 无标题的对话框TabHost
- 对话框顶部的选项卡FragmentPagerAdapter
的ViewPager
- 可滑动,其内容与选项卡相连接- 2-3个对话框按钮(对话框的不同子类,不同的按钮) - 不应该位于
ViewPager
的Fragment
之一,也就是说,无论ViewPager
显示哪个Fragment
,这些按钮都应该保留在对话框底部。
问题
IllegalStateException: Fragment does not have a view
我已经尝试/完成的部分
- 使用
android.support.v4
包中必要的类 - 调用
getChildFragmentManager()
而不是getSupportedFragmentManager()
- 实现了此链接中推荐的第10个帖子https://code.google.com/p/android/issues/detail?id=42601的内容。 我将代码直接复制/粘贴到我的两个
Fragment
类以及DialogFragment
类中,这些类应该显示ViewPager
。 - 在我的自定义
DialogFragment
中,我首先尝试重写onCreateView
,然后是onCreateDialog
,最后同时进行两者。所有这些我都得以运行,但结果却出乎意料。- 只有
onCreateView
:无法访问AlertDialog.Builder
以创建所需的按钮,除此之外,对话框的结果非常好。 - 仅
onCreateDialog
:上面显示的错误消息。我仍然认为这种方法是我接近想要实现的内容的方法。 - 同时进行
onCreateView
和onCreateDialog
:在onCreateView
中填充了对话框布局,并在onCreateDialog
中将对话框按钮添加到AlertDialog.Builder
中。这可以显示对话框,但是来自AlertDialog.Builder
的添加按钮不可见。此外,当单击EditText
字段时键盘没有出现。
- 只有
源代码
大部分来自Android 2.2+ViewPager和Fragments中实现TabHost使用的教程。其中ActivityFragment
的代码位于DialogFragment
中。然而,我用答案来源于https://dev59.com/K2oy5IYBdhLWcg3wq_7O#18167273的已修改的ViewPager替换了它的ViewPager。 这是为了能够使高度wrap_content
。
我项目中的有问题的代码应该在DialogFragment
的onCreateDialog
方法中。
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(), AlertDialog.THEME_HOLO_DARK);
LayoutInflater inflater = getActivity().getLayoutInflater();
view = inflater.inflate(R.layout.dialog_test, null);
addActionButtons(builder, view);
builder.setView(view);
mViewPager = (WrapContentHeightViewPager) view.findViewById(R.id.viewpager);
initialiseTabHost();
List<Fragment> fragments = getFragments();
pageAdapter = new DialogPageAdapter(getChildFragmentManager(), fragments);
mViewPager.setAdapter(pageAdapter);
mViewPager.setOnPageChangeListener(this);
Dialog dialog = builder.create();
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
dialog.show();
return dialog;
}
堆栈跟踪LogCat日志
FATAL EXCEPTION: main
java.lang.IllegalStateException: Fragment does not have a view
at android.support.v4.app.Fragment$1.findViewById(Fragment.java:1425)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:901)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:461)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1011)
at android.support.v4.view.ViewPager.populate(ViewPager.java:880)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1374)
at my.app.package.name.WrapContentHeightViewPager.onMeasure(WrapContentHeightViewPager.java:31)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1396)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15481)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:617)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:399)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1396)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15481)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5059)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2377)
at android.view.View.measure(View.java:15481)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1982)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1200)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1398)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1118)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4525)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
at android.view.Choreographer.doCallbacks(Choreographer.java:555)
at android.view.Choreographer.doFrame(Choreographer.java:525)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4946)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.jav
此外...
- 我没有成功地尝试过在https://code.google.com/p/android/issues/detail?id=42601中提到的其他可能解决方案,这在帖子#2和#13中提到,因为我没有理解我在哪里和如何在我的代码中使用它(我猜我和写#18的人处于同一艘船上)。