android笔记——点击按钮放大

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package com.example.button;import android.os.Bundle;import android.animation.AnimatorSet;import android.animation.ObjectAnimator;import android.app.Activity;import android.view.MotionEvent;import android.view.View;import android.widget.Button;public class MainActivity extends Activity { private Button button; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  button = (Button) findViewById(R.id.button);  button.setOnTouchListener(new Button.OnTouchListener() {   @Override   public boolean onTouch(View v, MotionEvent event) {    if (event.getAction() == MotionEvent.ACTION_DOWN) {     //点击按钮未松开时按钮放大     blow_up(button);    } else if (event.getAction() == MotionEvent.ACTION_UP) {     //点击按钮松开后按钮缩小     narrow(button);    }    return false;   }  }); } //放大按钮动画 private void blow_up(View v) {  float[] vaules = new float[] { 1.0f, 1.1f, 1.2f, 1.3f, 1.4f, 1.5f};  AnimatorSet set = new AnimatorSet();  set.playTogether(ObjectAnimator.ofFloat(v, "scaleX", vaules),    ObjectAnimator.ofFloat(v, "scaleY", vaules));  set.setDuration(150);  set.start(); } //缩小按钮动画 private void narrow(View v) {  float[] vaules = new float[] { 1.5f, 1.4f, 1.3f, 1.2f, 1.1f, 1.0f};  AnimatorSet set = new AnimatorSet();  set.playTogether(ObjectAnimator.ofFloat(v, "scaleX", vaules),    ObjectAnimator.ofFloat(v, "scaleY", vaules));  set.setDuration(150);  set.start(); }}

布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:gravity="center"    tools:context=".MainActivity" >    <Button        android:id="@+id/button"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="点我放大" /></RelativeLayout>

Animation介绍

http://www.cnblogs.com/shaweng/archive/2012/06/08/2541258.html

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