Question

我现在正在为学校项目做的Android应用程序发生奇怪的错误/副作用。最终目标应该是在按下屏幕顶部的按钮后才能显示的视图。最初，它是不可见地放置，然后切换。

但是，由于某种原因，它附加到的根视图也切换了可见性，因此它恰好是其所在片段的主要布局。有效地，最初的setVisibility（）调用引起了我的整个碎片消失。

任何理由吗？

编辑：为布局提供要附加的FrameLayout可以解决此问题。但是，问题仍然存在：是什么导致了这种行为？

代码：

        @Override
    public void onStart() {
        super.onStart();

        //prep timeselector view for transitions
        dashboardContainer = this.getView().findViewById(R.id.dashboardContainer);
        vgTimeSelector = getLayoutInflater().inflate(R.layout.viewgroup_timeselector,dashboardContainer);
        vgTimeSelector.setVisibility(View.INVISIBLE);

        //add timeselector popup
        bellButton = this.getView().findViewById(R.id.notificationButton);
        bellButton.setOnClickListener(togglerListener);
    }

private void toggleTimeSwitcherView () {

        //this is all animation stuff for timeselector
        int x = vgTimeSelector.getRight();
        int y = vgTimeSelector.getTop();
        int endRadius = (int) Math.hypot(vgTimeSelector.getWidth(),vgTimeSelector.getHeight());

        if (vgTimeSelector.getVisibility() == View.INVISIBLE) {
            vgTimeSelector.setVisibility(View.VISIBLE);
            Animator animator = ViewAnimationUtils.createCircularReveal(vgTimeSelector, x, y, 0, endRadius);
            animator.start();
        }
        else {
            Animator animator = ViewAnimationUtils.createCircularReveal(vgTimeSelector, x, y, endRadius, 0);
            animator.start();
            vgTimeSelector.setVisibility(View.INVISIBLE);
        }
    }

XML：


Fragment Layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".DashboardFragment"
    android:id="@+id/dashboardContainer">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/notificationButton"
        android:layout_alignParentRight="true"
        android:layout_margin="16dp"
        android:text="Bell"/> 

...

</RelativeLayout>

Child View:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="16dp"
    android:background="@color/darkGrey"
    android:id="@+id/timeselector"
    android:animateLayoutChanges="true">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:text="Notify me later"
        android:id="@+id/notifyTV"
        android:textSize="24sp"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:gravity="center"
        android:layout_below="@id/notifyTV">

        <TimePicker
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:timePickerMode="spinner" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="N"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Y"/>

    </LinearLayout>

</RelativeLayout>

Answer 1

您正在切换整个dashboardContainer的可见性。我相信这个dashboardContainer.setVisibility(View.VISIBLE); 应该用vgTimeSelector.setVisibility(View.VISIBLE)和

替换

dashboardContainer.setVisibility(View.INVISIBLE);和vgTimeSelector.setVisibility(View.INVISIBLE)

//this is all animation stuff for timeselector
        int x = vgTimeSelector.getRight();
        int y = vgTimeSelector.getTop();
        int endRadius = (int) Math.hypot(vgTimeSelector.getWidth(),vgTimeSelector.getHeight());

        if (vgTimeSelector.getVisibility() == View.INVISIBLE) {
            dashboardContainer.setVisibility(View.VISIBLE);
            Animator animator = ViewAnimationUtils.createCircularReveal(vgTimeSelector, x, y, 0, endRadius);
            animator.start();
        }
        else {
            Animator animator = ViewAnimationUtils.createCircularReveal(vgTimeSelector, x, y, endRadius, 0);
            animator.start();
            dashboardContainer.setVisibility(View.INVISIBLE);
        }

充气布局的根部的可见性随着孩子的可见性而变化

1 个答案: