问题
I have an Activity and few Fragments. I have to replace fragment in FrameLayout. But when I'm using this function my app crashes. Here is the code of function
Android.Support.V4.App.Fragment fragment = null;
switch (position) {
case 0:
fragment = new ScheduleFragment();
break;
case 1:
fragment = new MainFragment();
break;
}
if (fragment != null) {
Android.Support.V4.App.FragmentManager fragmentManager = SupportFragmentManager;
var transaction = fragmentManager.BeginTransaction();
transaction.Replace(Resource.Id.content_frame, fragment);
transaction.Commit();
mDrawerList.SetItemChecked (position, true);
SetTitle (mScreenTitles [position]);
mDrawerLayout.CloseDrawer (mDrawerList);
} else {
Log.Error (this.Class.Name, "Error, fragment not created");
}
And here is an error:
Java.Lang.RuntimeException: java.lang.reflect.InvocationTargetException at --- End of managed exception stack trace --- at java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) at Caused by: java.lang.reflect.InvocationTargetException at at java.lang.reflect.Method.invoke(Native Method) at at java.lang.reflect.Method.invoke(Method.java:372) at at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at ... 1 more at Caused by: md52ce486a14f4bcd95899665e9d932190b.JavaProxyThrowable: System.TypeLoadException: Could not load type 'Android.OS.BaseBundle' from assembly 'Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'. at Android.Views.View.n_OnSaveInstanceState (intptr,intptr) [0x00009] in /Users/builder/data/lanes/monodroid-mavericks-monodroid-5.1-series/d23da369/source/monodroid/src/Mono.Android/platforms/android-19/src/generated/Android.Views.View.cs:14822 at at (wrapper dynamic-method) object.e0a03ea8-44fe-4482-bf92-bc99edac0352 (intptr,intptr) at at md5d7f0962782a324dbc9992a12c8322ca0.PagerSlidingTabStrip.n_onSaveInstanceState(Native Method) at at md5d7f0962782a324dbc9992a12c8322ca0.PagerSlidingTabStrip.onSaveInstanceState(PagerSlidingTabStrip.java:86) at at android.view.View.dispatchSaveInstanceState(View.java:13550) at at android.view.ViewGroup.dispatchSaveInstanceState(ViewGroup.java:2859) at at android.view.ViewGroup.dispatchSaveInstanceState(ViewGroup.java:2865) at at android.view.View.saveHierarchyState(View.java:13533) at at android.support.v4.app.FragmentManagerImpl.saveFragmentViewState(FragmentManager.java:1639) at at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1023) at at android.support.v4.app.FragmentManagerImpl.removeFragment(FragmentManager.java:1233) at at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:696) at at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1499) at at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:456) at at android.os.Handler.handleCallback(Handler.java:739) at at android.os.Handler.dispatchMessage(Handler.java:95) at at android.os.Looper.loop(Looper.java:135) at at android.app.ActivityThread.main(ActivityThread.java:5221) at ... 4 more
Layout.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/gradientshape">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:text="УНИИ-ИТ, 1 курс, 11 - ПГ"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/info"
android:textColor="#ffffffff"
android:gravity="center_horizontal" />
<TextView
android:text="понедельник, 11 мая"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/dayOfMonth"
android:textColor="#ffffffff"
android:gravity="center" />
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00000000"
android:fadingEdge="vertical" />
</LinearLayout>
<ListView
android:id="@+id/left_drawer"
android:divider="@android:color/transparent"
android:dividerHeight="0dp"
android:choiceMode="singleChoice"
android:layout_width="220dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#111" />
</android.support.v4.widget.DrawerLayout>
Also i load the fragment layout for fragments in viewPager. Here is it:
<ListView
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/LessonsView"
android:layout_marginLeft="5dp"
android:padding="15dp"
android:divider="@null"
android:dividerHeight="0dp"
android:layout_marginTop="5dp"
android:layout_marginRight="5dp"
android:layout_marginBottom="5dp" />
And layout of ListView items in ViewPager.
<?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="wrap_content"
android:padding="1dp"
android:layout_marginTop="5dp">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minWidth="25px"
android:minHeight="25px"
android:layout_marginTop="5dp"
android:layout_marginBottom="0.0dp"
android:background="@drawable/border">
<TextView
android:text=" 1"
android:id="@+id/PairNumber"
android:layout_width="35.5dp"
android:layout_height="wrap_content"
android:gravity="top"
android:background="@drawable/triangle"
android:alpha="0.8"
android:layout_gravity="left"
android:textColor="#ff000000"
android:textAlignment="center" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:text="Инновационный менеджмент и развитие информационных технологий"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/pairTitle"
android:layout_marginTop="7dp"
android:textColor="#ff000000" />
<TextView
android:text="Лекция"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/pairType"
android:layout_marginTop="2dp"
android:textColor="#ff949494" />
</LinearLayout>
</LinearLayout>
<View
android:padding="5dp"
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#ffe5e8ea"
android:alpha="1" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="?android:dividerHorizontal"
android:minWidth="45px"
android:minHeight="115px"
android:background="#ffffff"
android:paddingRight="2dp"
android:paddingLeft="2dp"
android:paddingTop="-1dp">
<ImageView
android:src="@drawable/icon_teacher"
android:layout_width="35.5dp"
android:layout_height="match_parent"
android:id="@+id/imageView1"
android:scaleType="center"
android:layout_weight="0"
android:adjustViewBounds="false"
android:cropToPadding="false"
android:layout_marginTop="2dp" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#ffffff"
android:layout_gravity="center">
<TextView
android:text="Миленко"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/Teacher"
android:textColor="#ff000000"
android:layout_gravity="center" />
</LinearLayout>
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#ffe5e8ea"
android:alpha="1" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="?android:dividerHorizontal"
android:minWidth="45px"
android:minHeight="115px"
android:background="#ffffff"
android:paddingRight="2dp"
android:paddingLeft="2dp">
<ImageView
android:src="@drawable/icon_place"
android:layout_width="35.5dp"
android:layout_height="match_parent"
android:id="@+id/imageView1"
android:scaleType="center"
android:layout_weight="0"
android:adjustViewBounds="false"
android:cropToPadding="false"
android:layout_marginTop="1dp" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center">
<TextView
android:text="Корпус:1, Аудитория 314"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/pairPlace"
android:layout_gravity="center"
android:gravity="left"
android:textColor="#ff000000" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="4"
android:minWidth="45px"
android:minHeight="45px">
<TextView
android:text="20:15-21:45"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:id="@+id/pairTime"
android:layout_weight="3"
android:background="@drawable/timebackground"
android:gravity="center"
android:layout_gravity="top"
android:textColor="#ff000000" />
<Button
android:text="Напоминать"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:gravity="center"
android:id="@+id/NotifyBtn"
android:layout_weight="1"
android:textAppearance="?android:attr/textAppearanceSmall"
android:background="@drawable/buttonbackground"
android:textColor="#ffffffff"
android:layout_gravity="right"
android:drawableRight="@drawable/button_notify_inactive"
android:textSize="12dp"
android:alpha="0.9" />
</LinearLayout>
</LinearLayout>
回答1:
I am not certain based on this snipit, but if you are trying to access an Android resource Id such as mentioned by the previous person, you need to use Android.Resource.Id in Xamarin.
If this is not what you want, I would ask if you have a FrameLayout inside your desired container with the id content_frame.
I designed my layout and include a FrameLayout which is what I switch in and out of using the SupportFragmentManager.
回答2:
Android.Support.V4.App.Fragment fragment = null;
switch (position) {
case 0:
fragment = new ScheduleFragment();
break;
case 1:
fragment = new MainFragment();
break;
}
if (fragment != null) {
Android.Support.V4.App.FragmentManager fragmentManager = SupportFragmentManager;
var transaction = fragmentManager.BeginTransaction();
// ---- change this line ---- //
transaction.Replace(R.id.content_frame, fragment);
transaction.Commit();
mDrawerList.SetItemChecked (position, true);
SetTitle (mScreenTitles [position]);
mDrawerLayout.CloseDrawer (mDrawerList);
} else {
Log.Error (this.Class.Name, "Error, fragment not created");
}
来源：https://stackoverflow.com/questions/30219007/fragmentmanager-crashes-when-using-replace