Android 项目总结(自定义view的案例2之粒子爆炸效果)

public class SplitView extends View {

    private Paint mPaint;
    private Bitmap mBitmap;
    private float d = 3;//粒子直径
    private ValueAnimator mAnimator;
    private List<Ball> mBalls = new ArrayList<>();

    public SplitView(Context context) {
        this(context, null);
    }

    public SplitView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public SplitView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init(){
        mPaint = new Paint();
        mBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.pic);
        for (int i = 0; i < mBitmap.getWidth(); i++) {
            for (int j = 0; j < mBitmap.getHeight(); j++) {
                Ball ball = new Ball();
                ball.color = mBitmap.getPixel(i,j);
                ball.x