java 运行时异常：无法膨胀行为子类
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RuntimeException: Could not inflate Behavior subclass
提问by Aleksey Leonov
I new in android and I've troubles with FloatingActionButtonbehaivors
我是 android 新手，但我在FloatingActionButton行为方面遇到了麻烦
My custom behavtheitroad class:
我的自定义行为类：
public class ScrollingFABBehavior extends FloatingActionButton.Behavior {
private static final String TAG = "ScrollingFABBehavior";
public ScrollingFABBehavior(Context context, AttributeSet attrs,
Handler mHandler) {
super();
}
@Override
public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout,
FloatingActionButton child, View directTargetChild, View target,
int nestedScrollAxes) {
return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL
|| super.onStartNestedScroll(coordinatorLayout, child,
directTargetChild, target, nestedScrollAxes);
}
@Override
public void onNestedScroll(CoordinatorLayout coordinatorLayout,
FloatingActionButton child, View target, int dxConsumed,
int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
super.onNestedScroll(coordinatorLayout, child, target, dxConsumed,
dyConsumed, dxUnconsumed, dyUnconsumed);
if (dyConsumed > 0 && child.getVisibility() == View.VISIBLE) {
child.hide();
} else if (dyConsumed < 0 && child.getVisibility() == View.GONE) {
child.show();
}
}
@Override
public void onStopNestedScroll(CoordinatorLayout coordinatorLayout,
FloatingActionButton
child, View target) {
super.onStopNestedScroll(coordinatorLayout, child, target);
}
}
Fragment XML:
片段 XML：
...
...
<android.support.design.widget.FloatingActionButton
android:id="@+id/share_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:contentDescription="@string/action_share"
android:elevation="@dimen/fab_elevation"
android:src="@drawable/ic_share"
app:layout_behavior=".ScrollingFABBehavior"/>
</android.support.design.widget.CoordinatorLayout>
RuntimeError when fragment inflate xml:
片段膨胀 xml 时的运行时错误：
07-14 08:52:43.904 30785-30785/com.example.xyzreader E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.xyzreader, PID: 30785
android.view.InflateException: Binary XML file line #115: Could not inflate Behavior subclass com.example.xyzreader.ui.ScrollingFABBehavior
Caused by: java.lang.RuntimeException: Could not inflate Behavior subclass com.example.xyzreader.ui.ScrollingFABBehavior
at android.support.design.widget.CoordinatorLayout.parseBehavior(CoordinatorLayout.java:615)
at android.support.design.widget.CoordinatorLayout$LayoutParams.<init>(CoordinatorLayout.java:2652)
e.t.c
等等
Whats wrong?
怎么了？
回答by PangoSea
Add the following two constructors to your FooterBehavior:
将以下两个构造函数添加到您的FooterBehavior:
public FooterBehavior() {
}
public FooterBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
回答by Md Imran Choudhury
If you are using AndroidX (open-source project that the Android team uses to develop, test, package, version and release libraries within Jetpack) then you need to update XML.
如果您使用的是 AndroidX（Android 团队用于在 Jetpack 中开发、测试、打包、版本和发布库的开源项目），那么您需要更新 XML。
Find your element hereand replace:
在此处找到您的元素并替换：
Support:
支持：
android.support.design.widget.FloatingActionButton
AndroidX:
安卓X：
com.google.android.material.floatingactionbutton.FloatingActionButton
回答by Mahmoud
Make sure that you are using the correct path of the custom behavior class.
确保您使用的是自定义行为类的正确路径。
For example:
例如：
app:layout_behavior="net.company.myapp.view.behavior.TextViewBehavior"
回答by marius bardan
In case your app has a different package ID than your actual package structure, make sure you specify the full path to your custom behavior class:
如果您的应用程序的包 ID 与实际包结构不同，请确保指定自定义行为类的完整路径：
<android.support.design.widget.FloatingActionButton
...
app:layout_behavior="com.example.xyzreader.ScrollingFABBehavior"/>
回答by Aleksey Leonov
Solved. Change app:layout_behavior=".ScrollingFABBehavior"/>to app:layout_behavior=".ui.ScrollingFABBehavior"/>
解决了。更改app:layout_behavior=".ScrollingFABBehavior"/>为app:layout_behavior=".ui.ScrollingFABBehavior"/>
