Android仿QQ聊天撒花特效 很真实

  //撒花的区域  

 package com.lgl.test; import android.graphics.Bitmap; import android.graphics.Path; import java.io.Serializable; public class Fllower implements Serializable { private static final long serialVersionUID = 1L; private Bitmap image; private float x; private float y; private Path path; private float value; public Bitmap getResId() { return image; } public void setResId(Bitmap img) { this.image = img; } public float getX() { return x; } public void setX(float x) { this.x = x; } public float getY() { return y; } public void setY(float y) { this.y = y; } public Path getPath() { return path; } public void setPath(Path path) { this.path = path; } public float getValue() { return value; } public void setValue(float value) { this.value = value; } @Override public String toString() { return "Fllower [ x=" + x + ", y=" + y + ", path=" + path + ", value=" + value + "]"; } } 

 package com.lgl.test; import java.util.ArrayList; import java.util.List; import java.util.Random; import android.animation.ObjectAnimator; import android.animation.ValueAnimator; import android.animation.ValueAnimator.AnimatorUpdateListener; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PathMeasure; import android.util.Log; import android.util.TypedValue; import android.view.View; import android.view.WindowManager; import android.view.animation.AccelerateInterpolator; /** * 撒花 用到的知识点： 1、android属性动画 2、Path路径绘制 3、贝塞尔曲线 */ public class FllowerAnimation extends View implements AnimatorUpdateListener { /** * 动画改变的属性值 */ private float phase1 = 0f; private float phase2 = 0f; private float phase3 = 0f; /** * 小球集合 */ private List fllowers1 = new ArrayList(); private List fllowers2 = new ArrayList(); private List fllowers3 = new ArrayList(); /** * 动画播放的时间 */ private int time = 4000; /** * 动画间隔 */ private int delay = 400; int[] ylocations = { -100, -50, -25, 0 }; /** * 资源ID */ // private int resId = R.drawable.fllower_love; public FllowerAnimation(Context context) { super(context); init(context); // this.resId = resId; } @SuppressWarnings("deprecation") private void init(Context context) { WindowManager wm = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); width = wm.getDefaultDisplay().getWidth(); height = (int) (wm.getDefaultDisplay().getHeight() * 3 / 2f); mPaint = new Paint(); mPaint.setAntiAlias(true); // mPaint.setStrokeWidth(2); // mPaint.setColor(Color.BLUE); // mPaint.setStyle(Style.STROKE); pathMeasure = new PathMeasure(); builderFollower(fllowerCount, fllowers1); builderFollower(fllowerCount, fllowers2); builderFollower(fllowerCount, fllowers3); } /** * 宽度 */ private int width = 0; /** * 高度 */ private int height = 0; /** * 曲线高度个数分割 */ private int quadCount = 10; /** * 曲度 */ private float intensity = 0.2f; /** * 第一批个数 */ private int fllowerCount = 4; /** * 创建花 */ private void builderFollower(int count, List fllowers) { int max = (int) (width * 3 / 4f); int min = (int) (width / 4f); Random random = new Random(); for (int i = 0; i  points = builderPath(CPoint); drawFllowerPath(path, points); Fllower fllower = new Fllower(); fllower.setPath(path); Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.lift_flower); fllower.setResId(bitmap); fllowers.add(fllower); } } /** * 画曲线 * * @param path * @param points */ private void drawFllowerPath(Path path, List points) { if (points.size() > 1) { for (int j = 0; j  builderPath(CPoint point) { List points = new ArrayList(); Random random = new Random(); for (int i = 0; i  fllowers) { for (Fllower fllower : fllowers) { float[] pos = new float[2]; // canvas.drawPath(fllower.getPath(),mPaint); pathMeasure.setPath(fllower.getPath(), false); pathMeasure.getPosTan(height * fllower.getValue(), pos, null); // canvas.drawCircle(pos[0], pos[1], 10, mPaint); canvas.drawBitmap(fllower.getResId(), pos[0], pos[1] - dy, null); } } ObjectAnimator mAnimator1; ObjectAnimator mAnimator2; ObjectAnimator mAnimator3; public void startAnimation() { if (mAnimator1 != null && mAnimator1.isRunning()) { mAnimator1.cancel(); } mAnimator1 = ObjectAnimator.ofFloat(this, "phase1", 0f, 1f); mAnimator1.setDuration(time); mAnimator1.addUpdateListener(this); mAnimator1.start(); mAnimator1.setInterpolator(new AccelerateInterpolator(1f)); if (mAnimator2 != null && mAnimator2.isRunning()) { mAnimator2.cancel(); } mAnimator2 = ObjectAnimator.ofFloat(this, "phase2", 0f, 1f); mAnimator2.setDuration(time); mAnimator2.addUpdateListener(this); mAnimator2.start(); mAnimator2.setInterpolator(new AccelerateInterpolator(1f)); mAnimator2.setStartDelay(delay); if (mAnimator3 != null && mAnimator3.isRunning()) { mAnimator3.cancel(); } mAnimator3 = ObjectAnimator.ofFloat(this, "phase3", 0f, 1f); mAnimator3.setDuration(time); mAnimator3.addUpdateListener(this); mAnimator3.start(); mAnimator3.setInterpolator(new AccelerateInterpolator(1f)); mAnimator3.setStartDelay(delay * 2); } /** * 跟新小球的位置 * * @param value * @param fllowers */ private void updateValue(float value, List fllowers) { for (Fllower fllower : fllowers) { fllower.setValue(value); } } /** * 动画改变回调 */ @Override public void onAnimationUpdate(ValueAnimator arg0) { updateValue(getPhase1(), fllowers1); updateValue(getPhase2(), fllowers2); updateValue(getPhase3(), fllowers3); Log.i(tag, getPhase1() + ""); invalidate(); } public float getPhase1() { return phase1; } public void setPhase1(float phase1) { this.phase1 = phase1; } public float getPhase2() { return phase2; } public void setPhase2(float phase2) { this.phase2 = phase2; } public float getPhase3() { return phase3; } public void setPhase3(float phase3) { this.phase3 = phase3; } private String tag = this.getClass().getSimpleName(); private class CPoint { public float x = 0f; public float y = 0f; /** * x-axis distance */ public float dx = 0f; /** * y-axis distance */ public float dy = 0f; public CPoint(float x, float y) { this.x = x; this.y = y; } } } 

 package com.lgl.test; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.RelativeLayout; public class MainActivity extends Activity { private Button btn_start; // 撒花特效 private RelativeLayout rlt_animation_layout; private FllowerAnimation fllowerAnimation; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 撒花初始化 rlt_animation_layout = (RelativeLayout) findViewById(R.id.rlt_animation_layout); rlt_animation_layout.setVisibility(View.VISIBLE); fllowerAnimation = new FllowerAnimation(this); RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams( RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT); fllowerAnimation.setLayoutParams(params); rlt_animation_layout.addView(fllowerAnimation); btn_start = (Button) findViewById(R.id.btn_start); btn_start.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 开始撒花 fllowerAnimation.startAnimation(); } }); } }