Android实现点赞动画（27）

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); } }}

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; } }}

<?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>