视图无法锚定到父 CoordinatorLayout
View can not be anchored to the the parent CoordinatorLayout
这不是我的应用程序，这是将源代码放在 github 上的北欧应用程序，我正在尝试 运行 我机器上的源代码。但我一直有这个错误：
03-07 07:12:13.641 12622-12622/com.noxel.apppaneladmintry2 E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.noxel.apppaneladmintry2, PID: 12622
java.lang.IllegalStateException: View can not be anchored to the the parent CoordinatorLayout
at android.support.design.widget.CoordinatorLayout$LayoutParams.resolveAnchorView(CoordinatorLayout.java:2522)
at android.support.design.widget.CoordinatorLayout$LayoutParams.findAnchorView(CoordinatorLayout.java:2491)
at android.support.design.widget.CoordinatorLayout.prepareChildren(CoordinatorLayout.java:619)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:670)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560)
at android.view.View.measure(View.java:17442)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1166)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:921)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:716)
这是我的 Mainactivity 的布局：
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
style="@style/HeaderBar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
android:theme="@style/ActionBarThemeOverlay"
app:popupTheme="@style/ActionBarPopupThemeOverlay"
app:titleTextAppearance="@style/ActionBar.TitleText"/>
<android.support.design.widget.TabLayout
android:id="@+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabSelectedTextColor="@color/tabSelectedTextColor"
app:tabTextColor="@color/tabTextColor"
app:tabIndicatorColor="@color/tabIndicatorColor"
app:tabGravity="fill"
app:tabMode="fixed"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/fab_margin"
android:src="@drawable/fab_ic_add"
app:backgroundTint="@color/fab_normal"
app:layout_anchor="@+id/container"
app:layout_anchorGravity="bottom|right|end"
app:elevation="4dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/background_title"
android:layout_gravity="bottom|center"
android:layout_marginBottom="6dp"/>
</android.support.design.widget.CoordinatorLayout>
这是我的垃圾邮件屏幕代码：
public class SplashscreenActivity extends Activity {
/** Splash screen duration time in milliseconds */
private static final int DELAY = 1000;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splashscreen);
// Jump to MainActivity after DELAY milliseconds
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
final Intent intent = new Intent(SplashscreenActivity.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
intent.putExtra(MainActivity.OPENED_FROM_LAUNCHER, true);
startActivity(intent);
finish();
}
}, DELAY);
}
@Override
public void onBackPressed() {
// do nothing. Protect from exiting the application when splash screen is shown
}
}
这是我的闪屏布局：
<merge 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"
tools:context=".SplashscreenActivity" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="70dp"
android:scaleType="center"
android:src="@drawable/nordic_logo" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/background_title"
android:layout_gravity="bottom|center"
android:layout_marginBottom="6dp"/>
谁能告诉我如何解决这个问题？
这开始发生在支持设计库 v.23.2.0
compile 'com.android.support:design:23.2.0'
我知道这是从 v23.2.0 开始的，因为我的应用程序之前运行良好 (v.23.1.2)，但在更新后开始出现同样的故障。
错误很简单：
您的一个视图已锚定到其父 Coordinator Layout。但是，从 v.23.2.0 开始，不再允许这样做。
我认为错误出在您的 FAB 中：
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add"
...
app:layout_anchor="@+id/container"
... />
我相信 id/container 是父 CoordinatorLayout
修复中
正确的方法是更改 layout_anchor 并使用另一个视图作为锚点（父布局或固定在屏幕底部的任何其他视图）。
更改app:layout_anchor，不使用协调器
锚定 FAB 的视图必须是 CoordinatorLayout 的后代视图。
并且如果view是layout，FAB一定不能在layout里面，否则锚点重力设置将不起作用。例如：
<android.support.design.widget.CoordinatorLayout
android:id="@+id/content_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
.
.
.
<FrameLayout
android:id="@+id/attachment_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="@dimen/fab_margin_end"
android:layout_marginTop="@dimen/fab_margin_top"
android:scaleType="center"
android:src="@drawable/ic_action_save"
app:borderWidth="0dp"
app:elevation="@dimen/fab_elevation"
app:layout_anchor="@id/attachment_layout"
app:layout_anchorGravity="top|end"
app:rippleColor="@color/accent_highlight" />
</android.support.design.widget.CoordinatorLayout>
我朋友今天学到了另一种方法，就是使用 Studio 中的“设计”选项卡。我拖着我的 FAB 锚定并找出这段代码 --
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_margin="@dimen/activity_horizontal_margin"
android:src="@drawable/ic_add"
android:layout_gravity="center_vertical|center_horizontal"
app:layout_anchor="@+id/appBar"
app:layout_anchorGravity="bottom|right" />
请注意，这在我使用折叠工具栏时效果很好。我什至尝试设置不同的宽度并且效果很好。
Also it is working in any version of support library . Mine is 25.0.0
这是一个老问题，但我有最好的解决方案。
使用android:layout_gravity="bottom|end"（任何适合你的值）
注意 android 命名空间
此属性根据父视图布局定位 FAB。无需创建虚拟 FrameLayout 来锚定。
所有其他人都非常困惑试试这个
<android.support.design.widget.CoordinatorLayout
android:id="@+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/contentFrame"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add_notes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/fab_margin"
android:src="@drawable/ic_add"
app:fabSize="normal"
app:layout_anchor="@id/contentFrame"
app:layout_anchorGravity="bottom|right|end"/>
</android.support.design.widget.CoordinatorLayout>
这不是我的应用程序，这是将源代码放在 github 上的北欧应用程序，我正在尝试 运行 我机器上的源代码。但我一直有这个错误：
03-07 07:12:13.641 12622-12622/com.noxel.apppaneladmintry2 E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.noxel.apppaneladmintry2, PID: 12622
java.lang.IllegalStateException: View can not be anchored to the the parent CoordinatorLayout
at android.support.design.widget.CoordinatorLayout$LayoutParams.resolveAnchorView(CoordinatorLayout.java:2522)
at android.support.design.widget.CoordinatorLayout$LayoutParams.findAnchorView(CoordinatorLayout.java:2491)
at android.support.design.widget.CoordinatorLayout.prepareChildren(CoordinatorLayout.java:619)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:670)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17442)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560)
at android.view.View.measure(View.java:17442)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1166)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:921)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:716)
这是我的 Mainactivity 的布局：
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
style="@style/HeaderBar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
android:theme="@style/ActionBarThemeOverlay"
app:popupTheme="@style/ActionBarPopupThemeOverlay"
app:titleTextAppearance="@style/ActionBar.TitleText"/>
<android.support.design.widget.TabLayout
android:id="@+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabSelectedTextColor="@color/tabSelectedTextColor"
app:tabTextColor="@color/tabTextColor"
app:tabIndicatorColor="@color/tabIndicatorColor"
app:tabGravity="fill"
app:tabMode="fixed"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/fab_margin"
android:src="@drawable/fab_ic_add"
app:backgroundTint="@color/fab_normal"
app:layout_anchor="@+id/container"
app:layout_anchorGravity="bottom|right|end"
app:elevation="4dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/background_title"
android:layout_gravity="bottom|center"
android:layout_marginBottom="6dp"/>
</android.support.design.widget.CoordinatorLayout>
这是我的垃圾邮件屏幕代码：
public class SplashscreenActivity extends Activity {
/** Splash screen duration time in milliseconds */
private static final int DELAY = 1000;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splashscreen);
// Jump to MainActivity after DELAY milliseconds
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
final Intent intent = new Intent(SplashscreenActivity.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
intent.putExtra(MainActivity.OPENED_FROM_LAUNCHER, true);
startActivity(intent);
finish();
}
}, DELAY);
}
@Override
public void onBackPressed() {
// do nothing. Protect from exiting the application when splash screen is shown
}
}
这是我的闪屏布局：
<merge 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"
tools:context=".SplashscreenActivity" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="70dp"
android:scaleType="center"
android:src="@drawable/nordic_logo" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/background_title"
android:layout_gravity="bottom|center"
android:layout_marginBottom="6dp"/>
谁能告诉我如何解决这个问题？
这开始发生在支持设计库 v.23.2.0
compile 'com.android.support:design:23.2.0'
我知道这是从 v23.2.0 开始的，因为我的应用程序之前运行良好 (v.23.1.2)，但在更新后开始出现同样的故障。
错误很简单：
您的一个视图已锚定到其父 Coordinator Layout。但是，从 v.23.2.0 开始，不再允许这样做。
我认为错误出在您的 FAB 中：
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add"
...
app:layout_anchor="@+id/container"
... />
我相信 id/container 是父 CoordinatorLayout
修复中
正确的方法是更改 layout_anchor 并使用另一个视图作为锚点（父布局或固定在屏幕底部的任何其他视图）。
更改app:layout_anchor，不使用协调器
锚定 FAB 的视图必须是 CoordinatorLayout 的后代视图。
并且如果view是layout，FAB一定不能在layout里面，否则锚点重力设置将不起作用。例如：
<android.support.design.widget.CoordinatorLayout
android:id="@+id/content_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
.
.
.
<FrameLayout
android:id="@+id/attachment_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="@dimen/fab_margin_end"
android:layout_marginTop="@dimen/fab_margin_top"
android:scaleType="center"
android:src="@drawable/ic_action_save"
app:borderWidth="0dp"
app:elevation="@dimen/fab_elevation"
app:layout_anchor="@id/attachment_layout"
app:layout_anchorGravity="top|end"
app:rippleColor="@color/accent_highlight" />
</android.support.design.widget.CoordinatorLayout>
我朋友今天学到了另一种方法，就是使用 Studio 中的“设计”选项卡。我拖着我的 FAB 锚定并找出这段代码 --
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_margin="@dimen/activity_horizontal_margin"
android:src="@drawable/ic_add"
android:layout_gravity="center_vertical|center_horizontal"
app:layout_anchor="@+id/appBar"
app:layout_anchorGravity="bottom|right" />
请注意，这在我使用折叠工具栏时效果很好。我什至尝试设置不同的宽度并且效果很好。
Also it is working in any version of support library . Mine is 25.0.0
这是一个老问题，但我有最好的解决方案。
使用android:layout_gravity="bottom|end"（任何适合你的值）
注意 android 命名空间
此属性根据父视图布局定位 FAB。无需创建虚拟 FrameLayout 来锚定。
所有其他人都非常困惑试试这个
<android.support.design.widget.CoordinatorLayout
android:id="@+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/contentFrame"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add_notes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/fab_margin"
android:src="@drawable/ic_add"
app:fabSize="normal"
app:layout_anchor="@id/contentFrame"
app:layout_anchorGravity="bottom|right|end"/>
</android.support.design.widget.CoordinatorLayout>