前言
Activity的转场动画很早就有,但是太过于单调,样式也不好看,本文将给大家介绍了关于Android实现Reveal圆形Activity转场动画的相关内容,分享出来供大家参考学习,下面话不多说了,来一起看看详细的介绍吧
一、效果
二、知识点
CircularReveal动画、透明主题、转场动画(非必须)
三、方案
假设有两个Activity A和B。Reveal圆形Activity转场动画效果先从A到B,那么基本方案如下:
- 确定要显示的圆形动画中心起点位置
- 通过Intent将起点位置从Activity A传递B
- Activity B主题需要是透明的,同时先隐藏布局视图
- 在Activity A中启动Activity B,Activity A先不销毁
- Activity B启动之后开始动画,在动画启动时显布局视图
- 销毁Activity A,如果需要返回则不销毁
四、实现
4.1 初始界面Activity A
在Activity A中需要定义好主题、布局以及启动Activity B的方法。因为当不需要执行返回动画的时候,要把Activity A销毁,这时候一定是在后台销毁的,所以要把主题相关设置为透明,不然会在Activity B中显示Activity A销毁界面。
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<style name= "FullScreen" parent= "@style/Theme.AppCompat.Light.NoActionBar" > <item name= "android:windowFullscreen" > true </item> <item name= "android:windowContentOverlay" > @null </item> <item name= "android:windowIsTranslucent" > true </item> <item name= "android:windowBackground" > @android :color/transparent</item> <item name= "android:backgroundDimEnabled" > false </item> <item name= "android:windowTranslucentNavigation" > true </item> <item name= "android:windowTranslucentStatus" > true </item> <item name= "android:windowDrawsSystemBarBackgrounds" > true </item> </style> |
然后是布局设置,这一步比较简单,这里以启动界面为例,显示一张铺满全屏的图片,下面覆盖一个进度条。
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<? 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 = ".SplashActivity" > < ImageView android:layout_width = "match_parent" android:layout_height = "match_parent" android:scaleType = "fitXY" android:src = "@mipmap/wallace" /> < ProgressBar android:id = "@+id/progressbar" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_gravity = "bottom|center_horizontal" android:layout_marginBottom = "180dp" /> </ FrameLayout > |
在Activity A中启动Activity B代码如下,使用转场动画API执行,当然也可以使用ActivityCompat.startActivity(this, intent, null); overridePendingTransition(0, 0);这种方式。在这段代码中,把Activity A中开始执行Reveal圆形动画的坐标点传递给Activity B,因为动画是在Activity B中执行的。
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public void presentActivity(View view) { ActivityOptionsCompat options = ActivityOptionsCompat. makeSceneTransitionAnimation( this , view, "transition" ); int revealX = ( int ) (view.getX() + view.getWidth() / 2 ); int revealY = ( int ) (view.getY() + view.getHeight() / 2 ); Intent intent = new Intent( this , MainActivity. class ); intent.putExtra(MainActivity.EXTRA_CIRCULAR_REVEAL_X, revealX); intent.putExtra(MainActivity.EXTRA_CIRCULAR_REVEAL_Y, revealY); ActivityCompat.startActivity( this , intent, options.toBundle()); //ActivityCompat.startActivity(this, intent, null); overridePendingTransition(0, 0); } |
4.2 动画界面Activity B
在Activity B中同样需要定义好主题、布局以及执行动画的方法。上面方案中也说到,Activity B需要是透明主题,而且布局文件不能为透明,随便设置一个背景即可。因为动画效果是从Activity A过度到Activity B,也就是启动Activity B一切准备就绪之后,显示其布局。同时开始执行ViewAnimationUtils.createCircularReveal动画,createCircularReveal会把根布局慢慢展开。这样就形成了上面的动画效果。
主题设置如下:
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<style name= "AppTheme.Transparent" parent= "AppTheme" > <item name= "android:windowIsTranslucent" > true </item> <item name= "android:windowBackground" > @android :color/transparent</item> <item name= "android:windowDrawsSystemBarBackgrounds" > true </item> </style> |
布局设置如下,注意根布局背景设置:
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<?xml version= "1.0" encoding= "utf-8" ?> <android.support.constraint.ConstraintLayout 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:id= "@+id/root_layout" android:layout_width= "match_parent" android:layout_height= "match_parent" android:background= "@android:color/holo_blue_dark" tools:context= ".MainActivity" > <TextView android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "Hello World!" app:layout_constraintBottom_toBottomOf= "parent" app:layout_constraintLeft_toLeftOf= "parent" app:layout_constraintRight_toRightOf= "parent" app:layout_constraintTop_toTopOf= "parent" /> </android.support.constraint.ConstraintLayout> |
最后就是执行动画的代码,先把根据不设置为不可见,然后在跟布局测量完毕之后开始执行动画。
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if (savedInstanceState == null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && intent.hasExtra(EXTRA_CIRCULAR_REVEAL_X) && intent.hasExtra(EXTRA_CIRCULAR_REVEAL_Y)) { rootLayout.setVisibility(View.INVISIBLE); revealX = intent.getIntExtra(EXTRA_CIRCULAR_REVEAL_X, 0 ); revealY = intent.getIntExtra(EXTRA_CIRCULAR_REVEAL_Y, 0 ); ViewTreeObserver viewTreeObserver = rootLayout.getViewTreeObserver(); if (viewTreeObserver.isAlive()) { viewTreeObserver.addOnGlobalLayoutListener( new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { revealActivity(revealX, revealY); rootLayout.getViewTreeObserver().removeOnGlobalLayoutListener( this ); } }); } } else { rootLayout.setVisibility(View.VISIBLE); } |
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protected void revealActivity( int x, int y) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { float finalRadius = ( float ) (Math.max(rootLayout.getWidth(), rootLayout.getHeight()) * 1.1 ); // create the animator for this view (the start radius is zero) Animator circularReveal = ViewAnimationUtils.createCircularReveal(rootLayout, x, y, 0 , finalRadius); circularReveal.setDuration( 400 ); circularReveal.setInterpolator( new AccelerateInterpolator()); // make the view visible and start the animation rootLayout.setVisibility(View.VISIBLE); circularReveal.start(); } else { finish(); } } |
最后实现效果如下:
五、参考:
- https://android.jlelse.eu/a-little-thing-that-matter-how-to-reveal-an-activity-with-circular-revelation-d94f9bfcae28
- https://codesnipps.simolation.com/post/android/create-circular-reveal-animation-when-starting-activitys/
好了,以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,如果有疑问大家可以留言交流,谢谢大家对服务器之家的支持。
原文链接:https://blog.csdn.net/wangjinyu501/article/details/83662182