Debug完成图：
昨天晚上开始学一下这个揭露动画，准备用在项目中做一个转场，啃完了API之后开始写个小demo，距离跑成功一步之遥的当儿，出了个bug，就怎么点击按钮都没用。
首先上bug图：
bug：怎么点击按钮都没用，每点击一次都会出现下面的报错（2040）：
11-07 19:20:49.665 2454-2454/? I/Finsky: [1] com.google.android.finsky.services.j.a(149): Installation state replication succeeded.
11-07 19:20:49.711 7448-7448/? E/hei: 2040
11-07 19:20:49.718 1350-1371/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 5613338 , only wrote 5613120
11-07 19:20:50.376 7448-7448/? E/hei: 2040
11-07 19:20:50.992 7448-7448/? E/hei: 2040
11-07 19:20:51.591 7448-7448/? E/hei: 2040
11-07 19:20:54.790 1350-1372/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 6098164 , only wrote 5856480
11-07 19:20:58.322 7448-7448/? E/hei: 2040
11-07 19:20:58.328 1350-1371/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 5856667 , only wrote 5856480
11-07 19:21:01.540 1350-1372/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 6162708 , only wrote 6010560
activity.java全文：
package com.lwp.justtest;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewAnimationUtils;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
boolean flag = false;
FloatingActionButton fab;
private View mPuppet;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mPuppet = findViewById(R.id.view_puppet);
fab = (FloatingActionButton)findViewById(R.id.fab);
fab.setOnClickListener(this);
}
@Override
public void onClick(View v) {
doRevealAnimation();
}
private void doRevealAnimation() {
int[] vLocation = new int[2];
fab.getLocationInWindow(vLocation);
int centerX = vLocation[0] + fab.getMeasuredWidth() / 2;
int centerY = vLocation[1] + fab.getMeasuredHeight() / 2;
int height = mPuppet.getHeight();
int width = mPuppet.getWidth();
int maxRradius = (int) Math.hypot(height, width);
Log.e("hei", maxRradius + "");
if (flag) {
Animator animator = ViewAnimationUtils.createCircularReveal(mPuppet, centerX, centerY, maxRradius, 0);
animator.setDuration(1000);
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
mPuppet.setVisibility(View.GONE);
}
});
animator.start();
flag = false;
} else {
Animator animator = ViewAnimationUtils.createCircularReveal(mPuppet, centerX, centerY, 0, maxRradius);
animator.setDuration(1000);
animator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
mPuppet.setVisibility(View.VISIBLE);
}
@Override
public void onAnimationEnd(Animator animation) {
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
animator.start();
flag = true;
}
}
}
layout.xml全文：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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="com.lwp.justtest.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:layout_gravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<View
android:id="@+id/view_puppet"
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_gravity="bottom|end"
android:layout_margin="16dp"
android:backgroundTint="@color/colorPrimary"
android:src="@drawable/map"
app:pressedTranslationZ="10dp" />
</FrameLayout>
观众朋友们，这个看出毛病了吗。
我想了一下，额，会不会我的View没有设置颜色啊。。好的试了一下，果然是，可以说是很鬼畜了。。
layout.xml里边的View控件改成下面这样子，再次运行程序就成了（发现2040还是会报错，但是动画算是完美跑出来了，所以小伙伴们这里记得设置android:background以及android:visibility噢）：
<View
android:id="@+id/view_puppet"
android:background="@color/colorPrimaryDark"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"/>
效果图如下：
