最近项目要使用到点击一个按钮弹出多个按钮的效果,在试了几个类库后感觉不是很理想,所以自己代码实现了一个,下图所示:
实现原理很简单,就是利用android原声动画效果,当点击中心按钮时弹出其余按钮。闲话少叙,代码如下。
第一步:activity_main.xml 很简单,也就是五个相同位置的按钮
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<? xml version = "1.0" encoding = "utf-8" ?> < RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android" android:layout_width = "match_parent" android:layout_height = "match_parent" > < ImageButton android:id = "@+id/button" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_centerInParent = "true" android:layout_margin = "10dp" android:src = "@drawable/im" android:background = "@android:color/transparent" /> < ImageButton android:id = "@+id/button1" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_centerInParent = "true" android:layout_margin = "10dp" android:visibility = "invisible" android:src = "@drawable/i" android:background = "@android:color/transparent" /> < ImageButton android:id = "@+id/button2" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_centerInParent = "true" android:layout_margin = "10dp" android:src = "@drawable/ii" android:visibility = "invisible" android:background = "@android:color/transparent" /> < ImageButton android:id = "@+id/button3" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_centerInParent = "true" android:layout_margin = "10dp" android:src = "@drawable/iii" android:visibility = "invisible" android:background = "@android:color/transparent" /> < ImageButton android:id = "@+id/button4" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_centerInParent = "true" android:layout_margin = "10dp" android:src = "@drawable/iiii" android:visibility = "invisible" android:background = "@android:color/transparent" /> </ RelativeLayout > |
第二步:MainActivity
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package com.example.boombuttons; import java.util.ArrayList; public class MainActivity extends Activity implements OnClickListener{ // 中心按钮 private ImageButton button; // 四个子按钮 private ImageButton button1; private ImageButton button2; private ImageButton button3; private ImageButton button4; // 子按钮列表 private List<ImageButton> buttonItems = new ArrayList<ImageButton>( 3 ); // 标识当前按钮弹出与否,1代表已经未弹出,-1代表已弹出 private int flag = 1 ; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 实例化按钮并设立监听 button = (ImageButton)findViewById(R.id.button); button.setOnClickListener( this ); button1 = (ImageButton)findViewById(R.id.button1); button2 = (ImageButton)findViewById(R.id.button2); button3 = (ImageButton)findViewById(R.id.button3); button4 = (ImageButton)findViewById(R.id.button4); // 将子按钮们加入列表中 buttonItems.add(button1); buttonItems.add(button2); buttonItems.add(button3); buttonItems.add(button4); } /** * 按钮移动动画 * @params 子按钮列表 * @params 弹出时圆形半径radius */ public void buttonAnimation(List<ImageButton> buttonList, int radius){ for ( int i= 0 ;i<buttonList.size();i++){ ObjectAnimator objAnimatorX; ObjectAnimator objAnimatorY; ObjectAnimator objAnimatorRotate; // 将按钮设为可见 buttonList.get(i).setVisibility(View.VISIBLE); // 按钮在X、Y方向的移动距离 float distanceX = ( float ) (flag*radius*(Math.cos(Util.getAngle(buttonList.size(),i)))); float distanceY = -( float ) (flag*radius*(Math.sin(Util.getAngle(buttonList.size(),i)))); // X方向移动 objAnimatorX = ObjectAnimator.ofFloat(buttonList.get(i), "x" , buttonList.get(i).getX(),buttonList.get(i).getX()+distanceX); objAnimatorX.setDuration( 200 ); objAnimatorX.setStartDelay( 100 ); objAnimatorX.start(); // Y方向移动 objAnimatorY = ObjectAnimator.ofFloat(buttonList.get(i), "y" , buttonList.get(i).getY(),buttonList.get(i).getY()+distanceY); objAnimatorY.setDuration( 200 ); objAnimatorY.setStartDelay( 100 ); objAnimatorY.start(); // 按钮旋转 objAnimatorRotate = ObjectAnimator.ofFloat(buttonList.get(i), "rotation" , 0 , 360 ); objAnimatorRotate.setDuration( 200 ); objAnimatorY.setStartDelay( 100 ); objAnimatorRotate.start(); if (flag==- 1 ){ objAnimatorX.addListener( new AnimatorListener() { @Override public void onAnimationStart(Animator animation) { // TODO Auto-generated method stub } @Override public void onAnimationRepeat(Animator animation) { // TODO Auto-generated method stub } @Override public void onAnimationEnd(Animator animation) { // TODO Auto-generated method stub // 将按钮设为可见 for ( int i = 0 ; i < buttonItems.size(); i++) { buttonItems.get(i).setVisibility(View.INVISIBLE); } } @Override public void onAnimationCancel(Animator animation) { // TODO Auto-generated method stub } }); } } } } |
第三步:Util.java 工具类,写了一个静态方法,用于通过按钮个数和按钮在列表中的索引计算其弹出角度。
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public class Util { /** * 返回每个按钮应该出现的角度(弧度单位) * @param index * @return double 角度(弧度单位) */ public static double getAngle( int total, int index){ return Math.toRadians( 90 /(total- 1 )*index+ 90 ); } } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/wangtaocsdn/article/details/54345715