问题
this is not my app, this is nordic app that put its source on github and I am trying to run the soutce on my machine. but i keep having this error :
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)
an this is the layout of my Mainactivity :
<?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>
and this is my spash screen code:
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
}
}
and this is layout of my splash screen :
<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"/>
can anyone tell me how to solve this issue?
回答1:
This started to happened in support design library v.23.2.0
compile 'com.android.support:design:23.2.0'
I know this started with v23.2.0 because my app was working fine before (v.23.1.2) and started to present same failure after update.
Error is simple:
One of your views is anchored to its parent Coordinator Layout. However, starting at v.23.2.0, this is no longer allowed.
I think the error is in your FAB:
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add"
...
app:layout_anchor="@+id/container"
... />
I believe that id/container is a parent CoordinatorLayout
Fixing
Right way is change the layout_anchor and use another view as anchor (parent Layout or any other view which is fixed to bottom of the screen).
回答2:
The view to which the FAB is anchored must be a descendant view of the CoordinatorLayout.
And if the view is a layout, the FAB must not be inside the layout, otherwise the anchor gravity settings won't work. For example:
<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>
回答3:
There is another way my friend which I learned today by using Design tab in Studio . I dragged my FAB to anchor and find out this code --
<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" />
Do note that this is working perfectly as I am using Collapsing Toolbar. I have even trying setting different width and its working good .
Also it is working in any version of support library . Mine is 25.0.0
回答4:
change app:layout_anchor,not use Coodinator
回答5:
This is an old question but I have the best solution.
Use android:layout_gravity="bottom|end" (whatever value that suits you)
Note the android namespace
This attribute positions the FAB according to the parent view layout. There no need to create a dummy FrameLayout to anchor on.
回答6:
All others were very confusing TRY THIS
<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>
来源：https://stackoverflow.com/questions/35843705/view-can-not-be-anchored-to-the-the-parent-coordinatorlayout