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Android仿微信红包动画

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项目需要研究了一下微信红包动画，即硬币转动的效果，原理其实就是三张不同角度的图片利用帧动画进行播放，在参考了案例之后，给自己记录一下完成的过程 。
1，在XML文件中定义动画：
步骤如下：
①新建项目
②在目录中新建一个anim.xml(注意文件名小写)

根标签为-list，其中代表着是否只展示一遍，设置为false会不停的循环播放动画根标签下，通过item标签对动画中的每一个图片进行声明，: 表示展示所用的该图片的时间长度 ,可通过该参数来设置图片旋转的速度，其他属性可以自行查找资料~
2，设置布局文件，效果以及代码如下

Android仿微信红包动画

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Android仿微信红包动画

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3，实现红包弹窗的效果，效果及代码如下：
步骤如下：
①自定义红包弹窗Diaog类：红色代码部分为启动动画部分
Android仿微信红包动画

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package com.example.xuboyu.luckeymoney;import android.app.Dialog;import android.content.Context;import android.content.DialogInterface;import android.graphics.drawable.AnimationDrawable;import android.view.Display;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.WindowManager;import android.widget.Button;import android.widget.TextView;/*** 自定义红包弹窗* Created by xuboyu on 2017/2/20.*/public class LuckeyDialog extends Dialog {public LuckeyDialog(Context context) {super(context);}public LuckeyDialog(Context context, int theme) {super(context, theme);}public static class Builder {private Context context;private String name;//发红包者的名称private Button red_page;//拆红包按钮private String openButtonText;private OnClickListener openButtonClickListener;//关闭按钮private String closeButtonText;private OnClickListener closeButtonClickListener;public Builder(Context context, int dialog) {this.context = context;}/*** Set the Dialog title from resource** @param name* @return*/public Builder setName(int name) {this.name = (String) context.getText(name);return this;}/*** Set the Dialog title from String** @param name* @return*/public Builder setName(String name) {this.name = name;return this;}/*** Set the positive button resource and it's listener** @param closeButtonText* @return*/public Builder setCloseButton(int closeButtonText,OnClickListener listener) {this.closeButtonText = (String) context.getText(closeButtonText);this.closeButtonClickListener = listener;return this;}public Builder setCloseButton(String closeButtonText,OnClickListener listener) {this.closeButtonText = closeButtonText;this.closeButtonClickListener = listener;return this;}/*** Set the positive button resource and it's listener** @param openButtonText* @return*/public Builder setOpenButton(int openButtonText,OnClickListener listener) {this.openButtonText = (String) context.getText(openButtonText);this.openButtonClickListener = listener;return this;}public Builder setOpenButton(String openButtonText,OnClickListener listener) {this.openButtonText = openButtonText;this.openButtonClickListener = listener;return this;}public LuckeyDialog create() {LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);//加载布局final LuckeyDialog dialog = new LuckeyDialog(context,R.style.Dialog);View layout = inflater.inflate(R.layout.open, null);red_page = (Button) layout.findViewById(R.id.open_btn);//red指的是需要播放动画的ImageView控件AnimationDrawable animationDrawable = (AnimationDrawable)red_page.getBackground();animationDrawable.start();//启动动画dialog.addContentView(layout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));//设置发红包者姓名((TextView) layout.findViewById(R.id.name)).setText(name);//设置拆红包的按钮if (openButtonText != null) {((Button) layout.findViewById(R.id.open_btn)).setText(openButtonText);if (openButtonClickListener != null) {((Button) layout.findViewById(R.id.open_btn)).setOnClickListener(new View.OnClickListener() {public void onClick(View v) {openButtonClickListener.onClick(dialog, DialogInterface.BUTTON_POSITIVE);}});}} else {// if no confirm button just set the visibility to GONElayout.findViewById(R.id.open_btn).setVisibility(View.GONE);}//设置关闭按钮if (closeButtonText != null) {((Button) layout.findViewById(R.id.close)).setText(closeButtonText);if (closeButtonClickListener != null) {((Button) layout.findViewById(R.id.close)).setOnClickListener(new View.OnClickListener() {public void onClick(View v) {closeButtonClickListener.onClick(dialog,DialogInterface.BUTTON_POSITIVE);}});}} else {// if no confirm button just set the visibility to GONElayout.findViewById(R.id.close).setVisibility(View.GONE);}dialog.setContentView(layout);return dialog;}}}


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