使用SurfaceView实现简单的红包雨动画，供大家参考，具体内容如下

public class TranslateSurfaceView extends SurfaceView implements DrawInterface {

private DrawHandler drawHandler;

private int width;

private int height;

private Bitmap bitmap;

private int bitmapWidth;

private int bitmapHeight;

private Toast toast;

private int count = 0;

private ArrayList moveList = new ArrayList<>();

public TranslateSurfaceView(Context context) {

this(context, null);

}

public TranslateSurfaceView(Context context, AttributeSet attrs) {

this(context, attrs, -1);

}

public TranslateSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

init();

}

private void init() {

SurfaceHolder holder = getHolder();

setZOrderOnTop(true);

holder.setFormat(PixelFormat.TRANSLUCENT);

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

width = getMeasuredWidth();

height = getMeasuredHeight();

}

public void prepare() {

DrawThread drawThread = new DrawThread();

drawThread.start();

drawHandler = new DrawHandler(drawThread.getLooper(), this);

bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon_redenvelope2);

bitmapWidth = bitmap.getWidth();

bitmapHeight = bitmap.getHeight();

}

public void addMoveModel(MoveModel moveModel) {

moveList.add(moveModel);

}

public void start() {

count = 0;

moveList.clear();

for (int i = 0; i < 10; i++) {

generateModel();

}

drawHandler.sendEmptyMessage(DrawHandler.START_DRAW_KEY);

}

public void resume() {

drawHandler.sendEmptyMessage(DrawHandler.START_DRAW_KEY);

}

public void pause() {

drawHandler.sendEmptyMessage(DrawHandler.STOP_DRAW_KEY);

}

public void quit() {

if (null != bitmap) {

bitmap.recycle();

}

if (null != drawHandler) {

drawHandler.removeCallbacksAndMessages(null);

drawHandler.getLooper().quit();

}

}

@Override

public void startDraw() {

SurfaceHolder holder = getHolder();

Canvas canvas = holder.lockCanvas();

if (null == canvas) {

return;

}

Paint paint = new Paint();

paint.setAntiAlias(true);

canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);

for (MoveModel moveModel : moveList) {

canvas.drawBitmap(bitmap, moveModel.x, moveModel.y, paint);

if (moveModel.x > width || moveModel.y > height) {

resetMoveModel(moveModel);

} else {

moveModel.y += moveModel.randomY;

}

}

holder.unlockCanvasAndPost(canvas);

drawHandler.sendEmptyMessage(DrawHandler.START_DRAW_KEY);

}

@Override

public void stopDraw() {

drawHandler.removeMessages(DrawHandler.START_DRAW_KEY);

}

@Override

public boolean onTouchEvent(MotionEvent event) {

int action = event.getActionMasked();

switch (action) {

case MotionEvent.ACTION_DOWN:

checkInRect((int) event.getX(), (int) event.getY());

break;

}

return true;

}

/**

* 是否点击在红包区域

* @param x

* @param y

*/

private void checkInRect(int x, int y) {

int length = moveList.size();

for (int i = 0; i < length; i++) {

MoveModel moveModel = moveList.get(i);

Rect rect = new Rect((int) moveModel.x, (int) moveModel.y, (int) moveModel.x + bitmapWidth, (int) moveModel.y + bitmapHeight);

if (rect.contains(x, y)) {

count++;

resetMoveModel(moveModel);

if (toast == null) {

toast = Toast.makeText(getContext(), "", Toast.LENGTH_SHORT);

}

toast.setText("抢到红包" + count);

toast.show();

break;

}

}

}

private void resetMoveModel(MoveModel moveModel) {

Random random = new Random();

moveModel.x = random.nextInt(11) * (width / 10);

moveModel.y = 0;

moveModel.randomY = (random.nextInt(5) + 2) * getResources().getDisplayMetrics().density * 1.4f;

}

private void generateModel() {

Random random = new Random();

MoveModel moveModel = new MoveModel();

moveModel.moveId = moveList.size() + 1;

moveModel.x = random.nextInt(11) * (width / 10);

moveModel.y = 0;

moveModel.randomY = (random.nextInt(5) + 2) * getResources().getDisplayMetrics().density * 1.4f;

moveList.add(moveModel);

}

}

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找一找教程网。