Listener events for Android property animations

Overall very simple, directly on the code bar. Activity_main.xml:

1<?xml version= "1.0" encoding= "Utf-8"?>2<relativelayout xmlns:android= "Http://schemas.android.com/apk/res/android"3Xmlns:tools= "Http://schemas.android.com/tools"4Android:layout_width= "Match_parent"5android:layout_height= "Match_parent"6Tools:context= "Com.example.administrator.animator_demo2. Mainactivity ">7 8<Button9Android:id= "@+id/btn_click"TenAndroid:layout_width= "Wrap_content" Oneandroid:layout_height= "Wrap_content" AAndroid:layout_centerinparent= "true" -android:text= "click"/> -  the</RelativeLayout>

Then there is the Java code, Mainactivity.java:

1  PackageCom.example.administrator.animator_demo2;2 3 ImportAndroid.animation.Animator;4 ImportAndroid.animation.AnimatorListenerAdapter;5 ImportAndroid.animation.ObjectAnimator;6 ImportAndroid.os.Bundle;7 Importandroid.support.v7.app.AppCompatActivity;8 ImportAndroid.view.View;9 ImportAndroid.widget.Button;Ten ImportAndroid.widget.Toast; One  A  Public classMainactivityextendsAppcompatactivityImplementsView.onclicklistener { -  -     PrivateButton Btn_click; the  - @Override -     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); + Setcontentview (r.layout.activity_main); - Initview (); +     } A  at     Private voidInitview () { -Btn_click =(Button) Findviewbyid (R.id.btn_click); -Btn_click.setonclicklistener ( This); -     } -  - @Override in      Public voidOnClick (View v) { -         Switch(V.getid ()) { to              CaseR.id.btn_click: + //StartAnimator1 (); -                 /** the * StartAnimator1 () method, rewrite the four listening methods, because sometimes we * * We don't need to monitor that much, just the Onanimationend () method.  $ * Then we will choose the way to use StartAnimator2 (). (two different execution effects)Panax Notoginseng                  * */ - StartAnimator2 (); the                  Break; +         } A     } the  +     Private voidStartAnimator1 () { -         //Transparent animations $Objectanimator animator = Objectanimator.offloat (Btn_click, "alpha", 0F, 1F); $Animator.setduration (1000); -         //set up listening for animations -Animator.addlistener (NewAnimator.animatorlistener () { the @Override -              Public voidOnanimationstart (Animator animation) {Wuyi  the             } -  Wu @Override -              Public voidonanimationend (Animator animation) { About                 /** $ * In most cases, we're going to listen to this, what happens after the animation is over - * Here, we only pop a toast.  -                  * */ -Toast.maketext (mainactivity. This, "End of animation execution", Toast.length_short). Show (); A             } +  the @Override -              Public voidOnanimationcancel (Animator animation) { $  the             } the  the @Override the              Public voidonanimationrepeat (Animator animation) { -  in             } the         }); the Animator.start (); About     } the  the     Private voidStartAnimator2 () { the         //Transparent animations +Objectanimator animator = Objectanimator.offloat (Btn_click, "alpha", 0F, 1F); -Animator.setduration (1000); the         //set up listening for animationsBayiAnimator.addlistener (NewAnimatorlisteneradapter () { the @Override the              Public voidonanimationend (Animator animation) { -                 Super. Onanimationend (animation); -Toast.maketext (mainactivity. This, "End of animation execution", Toast.length_short). Show (); the             } the         }); the Animator.start (); the     } -}

Listener events for Android property animations