Question

我正在尝试在我的某个应用中添加底页。我知道如何使用它们，我在遵循中等教程（并阅读人们在Stack Overflow中遇到的问题）的同时实现了一个，这很好。

但是当我尝试在我的项目中复制它时，无论我将它放在主Activity还是Fragment中，它都会崩溃。即使我从我工作的例子中复制了相同的xmls和程序，它也让我疯狂，因为它崩溃了。

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">

<!-- Toolbar -->
<android.support.design.widget.AppBarLayout
    android:id="@+id/app_bar_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?android:attr/actionBarSize"
        android:background="@color/colorPrimary"
        app:popupTheme="@style/PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<!-- Fragment -->
<FrameLayout
    android:id="@+id/main_screen_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginTop="?android:attr/actionBarSize"/>

<!-- Bottom navigation view -->
<android.support.design.widget.BottomNavigationView
    android:id="@+id/bottom_navigation"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:itemBackground="@color/colorPrimary"
    app:itemIconTint="@color/colorGreyLight"
    app:itemTextColor="@color/colorGreyLight"
    android:layout_gravity="bottom"
    app:menu="@menu/bottom_menu" />

frameLayout填充了我的App的多个片段，如下所示：

private fun showNewFragment(fragmentToShow: Fragment, addToBackStack: Boolean = true) {
    try {
        if (activity.supportFragmentManager != null) {
            activity.supportFragmentManager.popBackStack(null,
                    FragmentManager.POP_BACK_STACK_INCLUSIVE)

            val fragmentManager = activity.supportFragmentManager
            val transaction = fragmentManager.beginTransaction()
            transaction.setTransition(FragmentTransaction.TRANSIT_NONE)
            transaction.replace(fragmentPlaceholder, fragmentToShow)

            if (addToBackStack) {
                transaction.addToBackStack(null)
            }
            transaction.commit()
            fragmentManager.executePendingTransactions()
        }
    } catch (illegalState: IllegalStateException) {
        illegalState.printStackTrace()
    }
}

这是我试图放在framelayout中的片段的布局， fragment_lesson_view.xml ：

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context="com.trabajofindegrado.ui.screens.lessonview.LessonViewFragment">

<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="@string/hello_blank_fragment" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/fab_margin"
    android:src="@drawable/ic_message"
    app:layout_anchor="@+id/bottom_sheet_filters"
    app:layout_anchorGravity="top|end" />

<include
    layout="@layout/bottom_sheet_filters"
    />

我认为问题可能出在这里，因为FloatingActionButton没有正确锚定布局，就像找不到它一样。

片段，只是空的测试它：

class LessonViewFragment : Fragment() {
    companion object {
        val TAG = LessonViewFragment::class.java.simpleName

        val startIntent: Intent
            get() = Intent(TAG)
    }

    override fun onCreateView(inflater: LayoutInflater, 
                          container: ViewGroup?,
                          savedInstanceState: Bundle?): View? =
        inflater.inflate(R.layout.fragment_lesson_view, container, false)

}

最后，这里是 bottom_sheet_filters.xml ，我不认为它有问题，因为它是从我做的例子中100％复制的：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/bottom_sheet"
android:layout_width="match_parent"
android:layout_height="340dp"
android:background="@android:color/darker_gray"
android:orientation="vertical"
app:behavior_hideable="true"
app:behavior_peekHeight="@dimen/peek_height"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

<TextView
    android:id="@+id/navigation"
    android:layout_width="match_parent"
    android:layout_height="@dimen/peek_height"
    android:background="?android:attr/windowBackground"
    android:text="@string/sheet_title" />

<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="@string/very_large_test"
        android:textColor="@android:color/white" />

</android.support.v4.widget.NestedScrollView>

</LinearLayout>

它也不是一个问题，因为它在片段内部，我尝试在示例中使用片段并且它工作，然后我尝试将BottomSheet移动到活动并且它一直崩溃。日志：

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.trabajofindegrado/com.trabajofindegrado.activities.application.ApplicationActivity}: android.view.InflateException: Binary XML file line #32: Could not inflate Behavior subclass android.support.design.widget.BottomSheetBehavior
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
                      at android.app.ActivityThread.-wrap12(ActivityThread.java)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6119)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
                   Caused by: android.view.InflateException: Binary XML file line #32: Could not inflate Behavior subclass android.support.design.widget.BottomSheetBehavior
                   Caused by: java.lang.RuntimeException: Could not inflate Behavior subclass android.support.design.widget.BottomSheetBehavior
                      at android.support.design.widget.CoordinatorLayout.parseBehavior(CoordinatorLayout.java:628)
                      at android.support.design.widget.CoordinatorLayout$LayoutParams.<init>(CoordinatorLayout.java:2795)
                      at android.support.design.widget.CoordinatorLayout.generateLayoutParams(CoordinatorLayout.java:1703)
                      at android.support.design.widget.CoordinatorLayout.generateLayoutParams(CoordinatorLayout.java:112)
                      at android.view.LayoutInflater.parseInclude(LayoutInflater.java:989)
                      at android.view.LayoutInflater.rInflate(LayoutInflater.java:854)
                      at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
                      at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
                      at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
                      at com.trabajofindegrado.activities.application.ApplicationActivity.onCreate(ApplicationActivity.kt:50)
                      at android.app.Activity.performCreate(Activity.java:6720)
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
                      at android.app.ActivityThread.-wrap12(ActivityThread.java)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6119)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
                   Caused by: java.lang.reflect.InvocationTargetException
                      at java.lang.reflect.Constructor.newInstance0(Native Method)
                      at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
                      at android.support.design.widget.CoordinatorLayout.parseBehavior(CoordinatorLayout.java:626)
                      at android.support.design.widget.CoordinatorLayout$LayoutParams.<init>(CoordinatorLayout.java:2795) 
                      at android.support.design.widget.CoordinatorLayout.generateLayoutParams(CoordinatorLayout.java:1703) 
                      at android.support.design.widget.CoordinatorLayout.generateLayoutParams(CoordinatorLayout.java:112) 
                      at android.view.LayoutInflater.parseInclude(LayoutInflater.java:989) 
                      at android.view.LayoutInflater.rInflate(LayoutInflater.java:854) 
                      at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821) 
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:518) 
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:426) 
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:377) 
                      at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287) 
                      at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) 
                      at com.trabajofindegrado.activities.application.ApplicationActivity.onCreate(ApplicationActivity.kt:50) 
                      at android.app.Activity.performCreate(Activity.java:6720) 
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119) 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
                      at android.app.ActivityThread.-wrap12(ActivityThread.java) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:154) 
                      at android.app.ActivityThread.main(ActivityThread.java:6119) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
                   Caused by: java.lang.UnsupportedOperationException: Can't convert value at index 1 to dimension: type=0x4
                      at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:720)
                      at android.support.design.widget.BottomSheetBehavior.<init>(BottomSheetBehavior.java:187)
                      at java.lang.reflect.Constructor.newInstance0(Native Method) 
                      at java.lang.reflect.Constructor.newInstance(Constructor.java:430) 
                      at android.support.design.widget.CoordinatorLayout.parseBehavior(CoordinatorLayout.java:626) 
                      at android.support.design.widget.CoordinatorLayout$LayoutParams.<init>(CoordinatorLayout.java:2795) 
                      at android.support.design.widget.CoordinatorLayout.generateLayoutParams(CoordinatorLayout.java:1703) 
                      at android.support.design.widget.CoordinatorLayout.generateLayoutParams(CoordinatorLayout.java:112) 
                      at android.view.LayoutInflater.parseInclude(LayoutInflater.java:989) 
                      at android.view.LayoutInflater.rInflate(LayoutInflater.java:854) 
                      at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821) 
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:518) 
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:426) 
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:377) 
                      at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287) 
                      at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) 
                      at com.trabajofindegrado.activities.application.ApplicationActivity.onCreate(ApplicationActivity.kt:50) 
                      at android.app.Activity.performCreate(Activity.java:6720) 
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119) 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
                      at android.app.ActivityThread.-wrap12(ActivityThread.java) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:154) 
                      at android.app.ActivityThread.main(ActivityThread.java:6119) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

提前致谢

Answer 1

无法发表评论＆gt;声誉点不足。

我的2美分：不完全确定，但不应该所有设计支持库小部件都是CoordinatorLayout的直接子项吗？

确保所有其他尺寸都正确（具有正确的单位，与其他尺寸一致，例如peek_height不大于底部纸张本身）。

另外，你正在嵌套CoordinatorLayout，我怀疑你有最好的性能数字。我建议你找一个更好的设计。

我希望这能回答你的问题

Android崩溃膨胀行为

1 个答案: