我正在尝试在应用程序中创建显示效果,但没有成功。我想要的是打开片段时显示Cardview。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();
}
}
并在onCreateView
我开始了方法:
toggleInformationView(view);
这是cardview:
<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>
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$1.run(FragmentManager.java:454)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.os.Handler.handleCallback(Handler.java:739)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.os.Handler.dispatchMessage(Handler.java:95)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.os.Looper.loop(Looper.java:135)
11-08 17:25:48.541: E/AndroidRuntime(26925): at android.app.ActivityThread.main(ActivityThread.java:5221)
11-08 17:25:48.541: E/AndroidRuntime(26925): at java.lang.reflect.Method.invoke(Native Method)
11-08 17:25:48.541: E/AndroidRuntime(26925): at java.lang.reflect.Method.invoke(Method.java:372)
11-08 17:25:48.541: E/AndroidRuntime(26925): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
11-08 17:25:48.541: E/AndroidRuntime(26925): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
检查,似乎getWidth()
并getHeight()
返回0。但是我不知道这是否是真正的问题。谢谢