Question

我有一个活动和几个碎片。我必须在FrameLayout中替换片段。但是当我使用这个功能时，我的应用程序崩溃了。这是函数代码

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");
        }

这是一个错误：

Java.Lang.RuntimeException：java.lang.reflect.InvocationTargetException at --- Manage of managed 异常堆栈跟踪---在java.lang.RuntimeException： java处的java.lang.reflect.InvocationTargetException 在引发的com.android.internal.os.ZygoteInit.main（ZygoteInit.java:694） by：java.lang.reflect.InvocationTargetException at at java处的java.lang.reflect.Method.invoke（Native Method） java处的java.lang.reflect.Method.invoke（Method.java:372） com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:899） at ... 1更多信息： md52ce486a14f4bcd95899665e9d932190b.JavaProxyThrowable： System.TypeLoadException：无法加载类型'Android.OS.BaseBundle' 来自汇编'Mono.Android，Version = 0.0.0.0，Culture = neutral，公钥= 84e04ff9cfb79065' 。在 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（包装器动态方法） object.e0a03ea8-44fe-4482-bf92-bc99edac0352（intptr，intptr）at at md5d7f0962782a324dbc9992a12c8322ca0.PagerSlidingTabStrip.n_onSaveInstanceState（母语方法）在 md5d7f0962782a324dbc9992a12c8322ca0.PagerSlidingTabStrip.onSaveInstanceState（PagerSlidingTabStrip.java:86）在android.view.View.dispatchSaveInstanceState（View.java:13550）at 在 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 更

布局。

<?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>

我也在viewPager中加载片段的片段布局。这是它：

<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" />

ViewPager中的ListView项目布局。

<?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>

Answer 1

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");
    }

Answer 2

我不确定基于此片段，但如果您尝试访问前一个人提到的Android资源ID，则需要在Xamarin中使用Android.Resource.Id。

如果这不是您想要的，我会询问您是否在所需容器中有一个ID为content_frame的FrameLayout。

我设计了我的布局并包含了一个FrameLayout，这是我使用SupportFragmentManager切换的内容。

使用Replace

2 个答案: