Java 无法在分离视图上启动此动画制作器！显示效果
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Cannot start this animator on a detached view! reveal effect
提问by End.Game
I'm trying to create the reveal effect in my application but without success. What i want is reveal a cardview when i open a fragment. What i tried so far is:
我正在尝试在我的应用程序中创建显示效果，但没有成功。我想要的是当我打开一个片段时显示一个卡片视图。到目前为止我尝试过的是：
private void toggleInformationView(View view) {
infoContainer = view.findViewById(R.id.contact_card);
int cx = (view.getLeft() + view.getRight()) / 2;
int cy = (view.getTop() + view.getBottom()) / 2;
float radius = Math.max(infoContainer.getWidth(), infoContainer.getHeight()) * 2.0f;
if (infoContainer.getVisibility() == View.INVISIBLE) {
infoContainer.setVisibility(View.VISIBLE);
ViewAnimationUtils.createCircularReveal(infoContainer, cx, cy, 0, radius).start();
} else {
Animator reveal = ViewAnimationUtils.createCircularReveal(
infoContainer, cx, cy, radius, 0);
reveal.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
infoContainer.setVisibility(View.INVISIBLE);
}
});
reveal.start();
}
}
and in the onCreateViewi started the method:
在onCreateView我开始的方法中：
toggleInformationView(view);
this is the cardview:
这是卡片视图：
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:id="@+id/contact_card"
android:visibility="invisible"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:elevation="4dp"
android:foreground="?android:attr/selectableItemBackground"
android:orientation="vertical"
android:padding="10dp"
card_view:cardCornerRadius="2dp" >
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<ImageView
android:id="@+id/bg_contact"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_weight="0"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
android:src="@drawable/banner" />
</LinearLayout>
</android.support.v7.widget.CardView>
and the logcat:
和 logcat：
11-08 17:25:48.541: E/AndroidRuntime(26925): java.lang.IllegalStateException: Cannot start this animator on a detached view!
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.view.RenderNode.addAnimator(RenderNode.java:817)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.view.RenderNodeAnimator.setTarget(RenderNodeAnimator.java:277)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.view.RenderNodeAnimator.setTarget(RenderNodeAnimator.java:261)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.animation.RevealAnimator.<init>(RevealAnimator.java:37)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.view.ViewAnimationUtils.createCircularReveal(ViewAnimationUtils.java:48)
11-08 17:25:48.541: E/AndroidRuntime(26925): at com.as.asapp.TFragment.toggleInformationView(TFragment.java:64)
11-08 17:25:48.541: E/AndroidRuntime(26925): at com.as.asapp.TFragmentshowInformation(TFragment.java:52)
11-08 17:25:48.541: E/AndroidRuntime(26925): at com.as.asapp.TFragment.onCreateView(TFragment.java:37)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1786)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1126)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.support.v4.app.FragmentManagerImpl.run(FragmentManager.java:454)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.os.Handler.handleCallback(Handler.java:739)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.os.Handler.dispatchMessage(Handler.java:95)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.os.Looper.loop(Looper.java:135)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.app.ActivityThread.main(ActivityThread.java:5221)
11-08 17:25:48.541: E/AndroidRuntime(26925): at java.lang.reflect.Method.invoke(Native Method)
11-08 17:25:48.541: E/AndroidRuntime(26925): at java.lang.reflect.Method.invoke(Method.java:372)
11-08 17:25:48.541: E/AndroidRuntime(26925): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
11-08 17:25:48.541: E/AndroidRuntime(26925): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Checking, seems that getWidth()and getHeight()returns 0. But i don't know if it's the real problem. Thanks
检查，似乎getWidth()并getHeight()返回 0。但我不知道这是否是真正的问题。谢谢
采纳答案by Fernando Gallego
This is how I solved it, I added a onLayoutChange listener to the view in onCreateView callback, so whenever it is attached to the view and ready to draw, it makes the reveal
这就是我解决它的方法，我在 onCreateView 回调中向视图添加了一个 onLayoutChange 侦听器，因此每当它附加到视图并准备绘制时，它都会显示
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// Inflate the layout for this fragment
final View view = inflater.inflate(R.layout.fragment_map_list, container, false);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
view.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
v.removeOnLayoutChangeListener(this);
toggleInformationView(view);
}
});
}
return view;
}
回答by Fernando Gallego
Try to call it on the onViewCreatedmethod
尝试在onViewCreated方法上调用它
回答by Ziv Kesten
How about simply placing the method in the onViewCreated() method:
简单地将方法放在 onViewCreated() 方法中如何：
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
toggleInformationView(view);
}
it works
有用
回答by BennyKok
You can use runnable to do the anim . The runnable will run after the view's creation .
您可以使用 runnable 来执行 anim 。runnable 将在视图创建后运行。
view.post(new Runnable() {
@Override
public void run() {
//create your anim here
}
});
回答by Hitesh Sahu
I was using custom View so I used isAttachedToWindow()method to check if view is attached and avoid doing reveal while view is not attached.
我正在使用自定义视图，因此我使用isAttachedToWindow()方法来检查视图是否已附加，并避免在未附加视图时进行显示。
回答by Alexander
Small addition to Hitesh'sanswer. It's better to use https://developer.android.com/reference/android/support/v4/view/ViewCompat.html#isAttachedToWindow(android.view.View)
Hitesh答案的小补充。最好使用 https://developer.android.com/reference/android/support/v4/view/ViewCompat.html#isAttachedToWindow(android.view.View)
android.support.v4.view.ViewCompat
boolean isAttachedToWindow (View view)
Example:
例子：
LinearLayout rootView = null;
rootView = (LinearLayout) findViewById(R.id.rootView);
boolean isAttachedToWindow = ViewCompat.isAttachedToWindow(rootView);
回答by josedlujan
Use a ViewTreeObserver.
使用 ViewTreeObserver。
ViewTreeObserver viewTreeObserver = rootLayout.getViewTreeObserver();
if (viewTreeObserver.isAlive()) {
viewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
revealActivity(revealX, revealY);
rootLayout.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
});
}
回答by Sohaib Aslam
ah !!!, so finally here is the solution for this error. Actually, the problem is that we are assigning a view to animation with its height and width, and suddenly we didn't notice that there may be a case, that view won't load properly that time when we are assigning it to animation. So for that, we have to wait until view properly loads.
啊！！！，所以最后这里是这个错误的解决方案。实际上，问题在于我们正在为具有高度和宽度的动画分配视图，突然我们没有注意到可能存在这种情况，即当我们将其分配给动画时，该视图将无法正确加载。所以为此，我们必须等到视图正确加载。
LayoutInflater inflater = this.getLayoutInflater();
View rowView = inflater.inflate( R.layout.fileselecttype,null, true );
rowView or [Your View]
[Your View].post(new Runnable() {
@Override
public void run() {
//Do your animation work here.
}
});
回答by Rehan Sarwar
Check your Layout is attached to window or not by using rootLayout.isAttachedToWindow()method.
使用rootLayout.isAttachedToWindow()方法检查您的布局是否附加到窗口。
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (rootLayout!= null) {
if(rootLayout.isAttachedToWindow()) {
ViewTreeObserver viewTreeObserver = drawerLayout.getViewTreeObserver();
if (viewTreeObserver.isAlive()) {
viewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
startRevealAnimation(rootLayout);
rootLayout.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
});
}
}
}
回答by Juan Mendez
simplified outside of the scope of the question
超出问题范围的简化
private void startAnimation(@NonNull final View view, @NonNull final Runnable onAttachedToWindow) {
if (view.isAttachedToWindow()) {
onAttachedToWindow.run();
} else {
view.addOnAttachStateChangeListener(new View.OnAttachStateChangeListener() {
@Override
public void onViewAttachedToWindow(View view) {
onAttachedToWindow.run();
view.removeOnAttachStateChangeListener(this)
}
@Override
public void onViewDetachedFromWindow(View view) {
}
});
}
}
call startAnimation for one or many animations in mind
为一个或多个动画调用 startAnimation
startAnimation(view, new Runnable() {
@Override
public void run() {
//the code inside toggleInformationView(view)
}
});
