为 Pre-Lollipop 设备创建循环显示答案

【问题标题】：Create Circular Reveal for Pre-Lollipop Devices为 Pre-Lollipop 设备创建循环显示
【发布时间】：2015-09-18 11:59:12
【问题描述】：

第一件事，这和Create circular reveal for pre-Lollipop devices (Android)不是同一个问题

我正在使用那里提到的库来创建 Circular Reveal，但它似乎对我不起作用。

XML

<io.codetail.widget.RevealFrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <FrameLayout
            android:id="@+id/circBack"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#ff4081"
            android:visibility="invisible"
            ></FrameLayout>
</io.codetail.widget.RevealFrameLayout>

JAVA

                View myView = findViewById(R.id.circBack);


                // get the center for the clipping circle
                int cx = (myView.getLeft() + myView.getRight()) / 2;
                int cy = (myView.getTop() + myView.getBottom()) / 2;

                // get the final radius for the clipping circle
                int finalRadius = Math.max(myView.getWidth(), myView.getHeight());


                SupportAnimator animator = ViewAnimationUtils.createCircularReveal(myView, cx, cy, 0, finalRadius);
                animator.setInterpolator(new AccelerateDecelerateInterpolator());
                animator.setDuration(1000);
                myView.setVisibility(View.VISIBLE);
                animator.start();

圆形显示不显示。我的意思是当代码执行时什么都没有发生。

Logcat 显示了这个

07-01 19:15:47.498  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealRadius>

07-01 19:15:47.498  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealRadius>

07-01 19:15:47.498  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealRadius>

07-01 19:15:47.501  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.ViewAnimationUtils$SimpleAnimationListener>

07-01 19:15:47.501  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.ViewAnimationUtils$SimpleAnimationListener>

07-01 19:15:47.502  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealFinishedGingerbread>

07-01 19:15:47.502  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealFinishedGingerbread>

07-01 19:15:47.502  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealFinishedIceCreamSandwich>

07-01 19:15:47.503  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealFinishedIceCreamSandwich>

07-01 19:15:47.503  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealFinishedJellyBeanMr2>

07-01 19:15:47.503  27556-27556/com.ledo.ledoapp I/art﹕ Rejecting re-init on previously-failed class java.lang.Class<io.codetail.animation.RevealAnimator$RevealFinishedJellyBeanMr2>

但是，如果视图设置为在 XML 文件中可见，则循环显示确实有效，但问题是如果我将视图“circBack”设置为在 XML 中可见，它会从应用程序启动的那一刻，这很正常。

这个问题有什么解决办法吗？

【问题讨论】：

标签： android animation material-design animator

【解决方案1】：

看起来您正在“Gone”视图上初始化此动画？

尝试获取视图的可见性并确保在内部运行它

if (mView.getVisibility() == View.VISIBLE)
{
..
..
  anim.start();
}

代码块。

【讨论】：

我将视图设置为“不可见”而不是“消失”。
是的，我说它只是作为参考。当您在不可见或消失的视图上调用动画时会出现这种错误。

【解决方案2】：

好吧，当我以这种方式添加库时，Gradle 依赖项可能会出现问题，

错误的方式

dependencies {
    compile ('com.github.ozodrukh:CircularReveal:2.0.1@aar') {
        transitive = true;
    }
}

正道

dependencies {
    compile 'com.github.ozodrukh:CircularReveal:2.0.1'
}

抱歉，回复晚了。希望对有需要的人有所帮助。

【讨论】：