Android实现点赞动画（27）

本文实例为大家分享了android使用入门第二十七篇点赞动画的具体代码，供大家参考，具体内容如下

mainactivity.java代码:

package siso.likeanimation;

import android.graphics.bitmap;
import android.graphics.pointf;
import android.graphics.drawable.bitmapdrawable;
import android.support.v4.content.res.resourcescompat;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.imageview;

import java.util.arraylist;

public class mainactivity extends appcompatactivity {
 private divergeviewsecond mdivergeview;
 private button mbtnstart;
 private imageview mimageview;
 private arraylist<bitmap> mlist;
 private int mindex = 0;
 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_main);
 mbtnstart = (button)findviewbyid(r.id.btnstart);
 mimageview = (imageview)findviewbyid(r.id.iv_start);
 mlist = new arraylist<>();
 mlist.add(((bitmapdrawable) resourcescompat.getdrawable(getresources(), r.drawable.ic_praise_sm1, null)).getbitmap());
 mlist.add(((bitmapdrawable) resourcescompat.getdrawable(getresources(),r.drawable.ic_praise_sm2,null)).getbitmap());
 mlist.add(((bitmapdrawable) resourcescompat.getdrawable(getresources(),r.drawable.ic_praise_sm3,null)).getbitmap());
 mlist.add(((bitmapdrawable) resourcescompat.getdrawable(getresources(),r.drawable.ic_praise_sm4,null)).getbitmap());
 mlist.add(((bitmapdrawable) resourcescompat.getdrawable(getresources(),r.drawable.ic_praise_sm5,null)).getbitmap());
 mlist.add(((bitmapdrawable) resourcescompat.getdrawable(getresources(), r.drawable.ic_praise_sm6, null)).getbitmap());
 mbtnstart.setonclicklistener(new view.onclicklistener() {
  @override
  public void onclick(view v) {
  if(mindex == 5){
   mindex = 0 ;
  }
  mdivergeview.startdiverges(mindex);
  mindex ++;
//  if (mdivergeview.isrunning()) {
//   mdivergeview.stop();
//  } else {
//
//  }
  }
 });
 mdivergeview = (divergeviewsecond) findviewbyid(r.id.divergeview);
 mdivergeview.post(new runnable() {
  @override
  public void run() {
  mdivergeview.setendpoint(new pointf(mdivergeview.getmeasuredwidth()/2,0));
  mdivergeview.setdivergeviewprovider(new provider());
  }
 });
// mdivergeview.start();
 }

 @override
 protected void ondestroy() {
 super.ondestroy();
 if(mlist != null){
  mlist.clear();
  mlist = null;
 }

 }

 class provider implements divergeviewsecond.divergeviewprovider{

 @override
 public bitmap getbitmap(object obj) {
  return mlist == null ? null : mlist.get((int)obj);
 }
 }
}

divergeviewsecond.java代码:

package siso.likeanimation;

import android.content.context;
import android.graphics.bitmap;
import android.graphics.canvas;
import android.graphics.paint;
import android.graphics.pointf;
import android.util.attributeset;
import android.util.log;
import android.view.view;

import java.util.arraylist;
import java.util.collections;
import java.util.list;
import java.util.random;
import java.util.concurrent.copyonwritearraylist;


public class divergeviewsecond extends view implements runnable{

 public static final float mduration = 0.010f;
 public static final int mdefaultheight = 100;
 protected static final long mqueenduration = 200;

 protected final random mrandom = new random();

 protected arraylist<divergeinfo> mdivergeinfos;

 protected list<object> mqueen;

 protected pointf mptstart;
 protected pointf mptend;

 protected arraylist<divergeinfo> mdeadpool = new arraylist<>();

 private paint mpaint;

// private static final int mdefaultwidth = 100;
// private static final int malphaoffset = 50;

 private divergeviewprovider mdivergeviewprovider;

 private long mlastaddtime = 0;

 private thread mthread;

 private boolean mrunning = true;

 private boolean misdrawing = false;

 public divergeviewsecond(context context) {
 this(context, null);
 }

 public divergeviewsecond(context context, attributeset attrs) {
 this(context, attrs, 0);
 }

 public divergeviewsecond(context context, attributeset attrs, int defstyleattr) {
 super(context, attrs, defstyleattr);
 init();
 }


 /**
 * loop
 */
 @override
 public void run() {

 while(mrunning){

  if(mdivergeviewprovider == null){
  continue;
  }

  if(mqueen == null){
  continue;
  }

  if(misdrawing){
  //如果正在绘制，不要处理数据
  continue;
  }

  if(mdivergeinfos == null){
  continue;
  }

  dealqueen();

  if(mdivergeinfos.size() == 0){
  continue;
  }

  dealdiverge();

  misdrawing = true;

  postinvalidate();

 }

 //停止
 release();
 }

 private void dealdiverge(){
 for (int i = 0; i < mdivergeinfos.size(); i++) {
  divergeinfo divergeinfo = mdivergeinfos.get(i);

  float timeleft = 1.0f - divergeinfo.mduration;

  divergeinfo.mduration += mduration;

  float x, y;

  //二次贝塞尔
  float time1 = timeleft * timeleft;
  float time2 = 2 * timeleft * divergeinfo.mduration;
  float time3 = divergeinfo.mduration * divergeinfo.mduration;
  x = time1 * (mptstart.x)
   + time2 * (divergeinfo.mbreakpoint.x)
   + time3 * (divergeinfo.mendpoint.x);

  divergeinfo.mx = x;

  y = time1 * (mptstart.y)
   + time2 * (divergeinfo.mbreakpoint.y)
   + time3 * (divergeinfo.mendpoint.y);

  divergeinfo.my = y;

  if (divergeinfo.my <= divergeinfo.mendpoint.y) {
  mdivergeinfos.remove(i);
  mdeadpool.add(divergeinfo);
  i--;
  continue;
  }
 }
 }

 private void dealqueen(){
 long now = system.currenttimemillis();
 if(mqueen.size() > 0 && now - mlastaddtime > mqueenduration){
  mlastaddtime = system.currenttimemillis();
  divergeinfo divergeinfo = null;
  if(mdeadpool.size() > 0){
  //死池里面有空闲的divergenode
  divergeinfo = mdeadpool.get(0);
  mdeadpool.remove(0);
  }
  if(divergeinfo == null){
  divergeinfo = createdivergenode(mqueen.get(0));
  }
  divergeinfo.reset();
  divergeinfo.mtype = mqueen.get(0);
  mdivergeinfos.add(divergeinfo);
  mqueen.remove(0);
 }
 }

 public interface divergeviewprovider{
 public bitmap getbitmap(object obj);
 }


 private void init(){
 mpaint = new paint(paint.anti_alias_flag);
 }

 @override
 protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
 super.onmeasure(widthmeasurespec, heightmeasurespec);
 //不需要支持wrap_content

 }

 @override
 protected void onlayout(boolean changed, int left, int top, int right, int bottom) {
 super.onlayout(changed, left, top, right, bottom);

 }

 public void setdivergeviewprovider(divergeviewprovider divergeviewprovider){
 mdivergeviewprovider = divergeviewprovider;
 }

 public pointf getstartpoint(){
 return mptstart;
 }

 public boolean isrunning(){
 return mrunning;
 }

 public void startdiverges(object obj){

 if(mdivergeinfos == null){
  mdivergeinfos = new arraylist<>(30);
 }

 if(mqueen == null){
  mqueen = collections.synchronizedlist(new arraylist<>(30));
 }

 mqueen.add(obj);
// for(object obj : objs) {
//  mqueen.add(obj);
// }

 if(mthread == null) {
  mthread = new thread(this);
  mthread.start();
 }
 }

 public void stop(){
 if(mdivergeinfos != null){
  mdivergeinfos.clear();
 }

 if(mqueen != null){
  mqueen.clear();
 }

 if(mdeadpool != null){
  mdeadpool.clear();
 }

 }

 public void release(){
 stop();
 mptend = null;
 mptstart = null;
 mdivergeinfos = null;
 mqueen = null;
 mdeadpool = null;
 }

 public void setstartpoint(pointf point){
 mptstart = point;
 }

 public void setendpoint(pointf point){
 mptend = point;
 }

 @override
 protected void ondetachedfromwindow() {
 super.ondetachedfromwindow();
 mrunning = false;
 }

 @override
 protected void ondraw(canvas canvas) {

 if(mrunning && mdivergeviewprovider != null && mdivergeinfos != null){
  for(divergeinfo divergeinfo : mdivergeinfos){
  mpaint.setalpha((int)(255 * divergeinfo.my / mptstart.y));
  canvas.drawbitmap(mdivergeviewprovider.getbitmap(divergeinfo.mtype),
   divergeinfo.mx,
   divergeinfo.my,
   mpaint);
  }
 }
 misdrawing = false;
 }


 private pointf getbreakpointf(int scale1, int scale2) {

 pointf pointf = new pointf();
 pointf.x = mrandom.nextint((getmeasuredwidth() - getpaddingright() + getpaddingleft()) / scale1) + getmeasuredwidth() / scale2;
 pointf.y = mrandom.nextint((getmeasuredheight() - getpaddingbottom() + getpaddingtop()) / scale1) + getmeasuredheight() / scale2;
 return pointf;
 }

 protected divergeinfo createdivergenode(object type){
 pointf endpoint = mptend;
 if(endpoint == null){
  endpoint = new pointf(mrandom.nextint(getmeasuredwidth()),0);
 }
// int height = mdivergeviewprovider == null ? mdefaultheight : mdivergeviewprovider.getbitmap(type).getheight();
 if(mptstart == null) {
  mptstart = new pointf(getmeasuredwidth() / 2, getmeasuredheight() - mdefaultheight);//默认起始高度
 }
 return new divergeinfo(
  mptstart.x,
  mptstart.y,
  getbreakpointf(2, 3),
  endpoint,
  type);
 }

 public class divergeinfo {
 public float mduration;
 public pointf mbreakpoint;
 public pointf mendpoint;
 public float mx;
 public float my;
 public object mtype;
 public float mstartx;
 public float mstarty;
 public divergeinfo(float x, float y, pointf breakpoint, pointf endpoint, object type){
  mduration = 0.0f;
  mendpoint = endpoint;
  mx = x;
  my = y;
  mstartx = x;
  mstarty = y;
  mbreakpoint = breakpoint;
  mtype = type;
 }

 public void reset(){
  mduration = 0.0f;
  mx = mstartx;
  my = mstarty;
 }
 }
}

activity_main.xml内容:

<?xml version="1.0" encoding="utf-8"?>
<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:paddingbottom="@dimen/activity_vertical_margin"
 android:paddingleft="@dimen/activity_horizontal_margin"
 android:paddingright="@dimen/activity_horizontal_margin"
 android:paddingtop="@dimen/activity_vertical_margin"
 tools:context="siso.likeanimation.mainactivity">

 <button
 android:id="@+id/btnstart"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="开始"/>

 <siso.likeanimation.divergeviewsecond
 android:id="@+id/divergeview"
 android:layout_alignparentbottom="true"
 android:layout_alignparentright="true"
 android:layout_width="130dp"
 android:layout_height="300dp"/>
 <imageview
 android:id="@+id/iv_start"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginright="10dp"
 android:layout_alignparentbottom="true"
 android:layout_alignparentright="true"
 android:background="@drawable/ic_praise_sm6"/>
</relativelayout>

运行结果如图：

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。