5分钟快速实现Android爆炸破碎酷炫动画特效的示例

new ExplosionField(this).explode(view, null))

./|-- explosion| |-- MainActivity.java (测试爆炸破碎动效的主界面)| |-- animation(爆炸破碎动效有关的类均在这里)| | |-- ExplosionAnimator.java(爆炸动画)| | |-- ExplosionField.java(爆炸破碎动画所依赖的View)| | `-- ParticleModel.java(每个破碎后的粒子的model，颜色、位置、大小等)| `-- utils|  `-- UIUtils.java(计算状态栏高度的工具类)`-- tree.txt

/** * 说明：测试的界面 * 作者：Jian * 时间：2017/12/26. */public class MainActivity extends AppCompatActivity { /**  * 加载布局文件，添加点击事件  */ @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  initViewsClick(); } /**  * 添加点击事件的实现  */ private void initViewsClick() {  // 为单个View添加点击事件  final View  title.setOnClickListener(v ->    new ExplosionField(MainActivity.this).explode(title, null));  // 为中间3个View添加点击事件  setSelfAndChildDisappearOnClick(findViewById(R.id.title_disappear_ll));  // 为下面3个View添加点击事件  setSelfAndChildDisappearAndAppearOnClick(findViewById(R.id.title_disappear_and_appear_ll));  // 跳转到github网页的点击事件  findViewById(R.id.github_tv).setOnClickListener((view) -> {   Intent intent = new Intent();   intent.setAction(Intent.ACTION_VIEW);   Uri content_url = Uri.parse(getString(R.string.github));   intent.setData(content_url);   startActivity(intent);  }); } /**  * 为自己以及子View添加破碎动画，动画结束后，把View消失掉  * @param view 可能是ViewGroup的view  */ private void setSelfAndChildDisappearOnClick(final View view) {  if (view instanceof ViewGroup) {   ViewGroup viewGroup = (ViewGroup) view;   for (int i = 0; i < viewGroup.getChildCount(); i++) {    setSelfAndChildDisappearOnClick(viewGroup.getChildAt(i));   }  } else {   view.setOnClickListener(v ->     new ExplosionField(MainActivity.this).explode(view,       new AnimatorListenerAdapter() {        @Override        public void onAnimationEnd(Animator animation) {         super.onAnimationEnd(animation);         view.setVisibility(View.GONE);        }       }));  } } /**  * 为自己以及子View添加破碎动画，动画结束后，View自动出现  * @param view 可能是ViewGroup的view  */ private void setSelfAndChildDisappearAndAppearOnClick(final View view) {  if (view instanceof ViewGroup) {   ViewGroup viewGroup = (ViewGroup) view;   for (int i = 0; i < viewGroup.getChildCount(); i++) {    setSelfAndChildDisappearAndAppearOnClick(viewGroup.getChildAt(i));   }  } else {   view.setOnClickListener(v ->     new ExplosionField(MainActivity.this).explode(view, null));  } }}

/** * 说明：爆破粒子，每个移动与渐变的小块 * 作者：Jian * 时间：2017/12/26. */class ParticleModel { // 默认小球宽高 static final int PART_WH = 8; // 随机数，随机出位置和大小 static Random random = new Random(); //center x of circle float cx; //center y of circle float cy; // 半径 float radius; // 颜色 int color; // 透明度 float alpha; // 整体边界 Rect mBound; ParticleModel(int color, Rect bound, Point point) {  int row = point.y; //行是高  int column = point.x; //列是宽  this.mBound = bound;  this.color = color;  this.alpha = 1f;  this.radius = PART_WH;  this.cx = bound.left + PART_WH * column;  this.cy = bound.top + PART_WH * row; } // 每一步动画都得重新计算出自己的状态值 void advance(float factor) {  cx = cx + factor * random.nextInt(mBound.width()) * (random.nextFloat() - 0.5f);  cy = cy + factor * random.nextInt(mBound.height() / 2);  radius = radius - factor * random.nextInt(2);  alpha = (1f - factor) * (1 + random.nextFloat()); }}

/** * 说明：爆炸动画类，让离子移动和控制离子透明度 * 作者：Jian * 时间：2017/12/26. */class ExplosionAnimator extends ValueAnimator { private static final int DEFAULT_DURATION = 1500; private ParticleModel[][] mParticles; private Paint mPaint; private View mContainer; public ExplosionAnimator(View view, Bitmap bitmap, Rect bound) {  setFloatValues(0.0f, 1.0f);  setDuration(DEFAULT_DURATION);  mPaint = new Paint();  mContainer = view;  mParticles = generateParticles(bitmap, bound); } // 生成粒子，按行按列生成全部粒子 private ParticleModel[][] generateParticles(Bitmap bitmap, Rect bound) {  int w = bound.width();  int h = bound.height();  // 横向粒子的个数  int horizontalCount = w / ParticleModel.PART_WH;  // 竖向粒子的个数  int verticalCount = h / ParticleModel.PART_WH;  // 粒子宽度  int bitmapPartWidth = bitmap.getWidth() / horizontalCount;  // 粒子高度  int bitmapPartHeight = bitmap.getHeight() / verticalCount;  ParticleModel[][] particles = new ParticleModel[verticalCount][horizontalCount];  for (int row = 0; row < verticalCount; row++) {   for (int column = 0; column < horizontalCount; column++) {    //取得当前粒子所在位置的颜色    int color = bitmap.getPixel(column * bitmapPartWidth, row * bitmapPartHeight);    Point point = new Point(column, row);    particles[row][column] = new ParticleModel(color, bound, point);   }  }  return particles; } // 由view调用，在View上绘制全部的粒子 void draw(Canvas canvas) {  // 动画结束时停止  if (!isStarted()) {   return;  }  // 遍历粒子，并绘制在View上  for (ParticleModel[] particle : mParticles) {   for (ParticleModel p : particle) {    p.advance((Float) getAnimatedValue());    mPaint.setColor(p.color);    // 错误的设置方式只是这样设置，透明色会显示为黑色    // mPaint.setAlpha((int) (255 * p.alpha));     // 正确的设置方式，这样透明颜色就不是黑色了    mPaint.setAlpha((int) (Color.alpha(p.color) * p.alpha));    canvas.drawCircle(p.cx, p.cy, p.radius, mPaint);   }  }  mContainer.invalidate(); } @Override public void start() {  super.start();  mContainer.invalidate(); }}

/** * 说明：每次爆炸时，创建一个覆盖全屏的View，这样的话，不管要爆炸的View在任何位置都能显示爆炸效果 * 作者：Jian * 时间：2017/12/26. */public class ExplosionField extends View { private static final String TAG = "ExplosionField"; private static final Canvas mCanvas = new Canvas(); private ExplosionAnimator animator; public ExplosionField(Context context) {  super(context); } @Override protected void onDraw(Canvas canvas) {  super.onDraw(canvas);  animator.draw(canvas); } /**  * 执行爆破破碎动画  */ public void explode(final View view, final AnimatorListenerAdapter listener) {  Rect rect = new Rect();  view.getGlobalVisibleRect(rect); //得到view相对于整个屏幕的坐标  rect.offset(0, -UIUtils.statusBarHeignth()); //去掉状态栏高度  animator = new ExplosionAnimator(this, createBitmapFromView(view), rect);  // 接口回调  animator.addListener(new Animator.AnimatorListener() {   @Override   public void onAnimationStart(Animator animation) {    if (listener != null) listener.onAnimationStart(animation);    // 延时添加到界面上    attach2Activity((Activity) getContext());    // 让被爆炸的View消失（爆炸的View是新创建的View，原View本身不会发生任何变化）    view.animate().alpha(0f).setDuration(150).start();   }   @Override   public void onAnimationEnd(Animator animation) {    if (listener != null) listener.onAnimationEnd(animation);    // 从界面中移除    removeFromActivity((Activity) getContext());    // 让被爆炸的View显示（爆炸的View是新创建的View，原View本身不会发生任何变化）    view.animate().alpha(1f).setDuration(150).start();   }   @Override   public void onAnimationCancel(Animator animation) {    if (listener != null) listener.onAnimationCancel(animation);   }   @Override   public void onAnimationRepeat(Animator animation) {    if (listener != null) listener.onAnimationRepeat(animation);   }  });  animator.start(); } private Bitmap createBitmapFromView(View view) {//   为什么屏蔽以下代码段？//   如果ImageView直接得到位图，那么当它设置背景（backgroud)时，不会读取到背景颜色//  if (view instanceof ImageView) {//   Drawable drawable = ((ImageView)view).getDrawable();//   if (drawable != null && drawable instanceof BitmapDrawable) {//    return ((BitmapDrawable) drawable).getBitmap();//   }//  }  //view.clearFocus(); //不同焦点状态显示的可能不同——（azz:不同就不同有什么关系？）  Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);  if (bitmap != null) {   synchronized (mCanvas) {    mCanvas.setBitmap(bitmap);    view.draw(mCanvas);    // 清除引用    mCanvas.setBitmap(null);   }  }  return bitmap; } /**  * 将创建的ExplosionField添加到Activity上  */ private void attach2Activity(Activity activity) {  ViewGroup rootView = activity.findViewById(Window.ID_ANDROID_CONTENT);  ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(    ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);  rootView.addView(this, lp); } /**  * 将ExplosionField从Activity上移除  */ private void removeFromActivity(Activity activity) {  ViewGroup rootView = activity.findViewById(Window.ID_ANDROID_CONTENT);  rootView.removeView(this); }}

public class UIUtils { public static int dp2px(double dpi) {  return (int) (Resources.getSystem().getDisplayMetrics().density * dpi + 0.5f); } public static int statusBarHeignth() {  return dp2px(25); }}