Android连续点赞特效

Android连续点赞特效可以通过自定义View来实现。下面是一个简单的示例代码：

public class LikeView extends View {
    private static final int DEFAULT_TEXT_SIZE = 30;
    private static final int DEFAULT_TEXT_COLOR = Color.RED;
    private static final int DEFAULT_ANIMATION_DURATION = 1000;

    private String mText;
    private int mTextSize;
    private int mTextColor;
    private int mAnimationDuration;
    private Paint mPaint;
    private ValueAnimator mAnimator;

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

    public LikeView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init(attrs);
    }

    private void init(AttributeSet attrs) {
        // 从xml属性中获取自定义属性值
        TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.LikeView);
        mText = typedArray.getString(R.styleable.LikeView_likeText);
        mTextSize = typedArray.getDimensionPixelSize(R.styleable.LikeView_likeTextSize, DEFAULT_TEXT_SIZE);
        mTextColor = typedArray.getColor(R.styleable.LikeView_likeTextColor, DEFAULT_TEXT_COLOR);
        mAnimationDuration = typedArray.getInt(R.styleable.LikeView_likeAnimationDuration, DEFAULT_ANIMATION_DURATION);
        typedArray.recycle();

        // 初始化画笔
        mPaint = new Paint();
        mPaint.setTextSize(mTextSize);
        mPaint.setColor(mTextColor);

        // 初始化动画
        mAnimator = ValueAnimator.ofFloat(0, 1);
        mAnimator.setDuration(mAnimationDuration);
        mAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                invalidate();
            }
        });
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (mText != null) {
            // 根据动画进度绘制文本
            float progress = (float) mAnimator.getAnimatedValue();
            int alpha = (int) (255 * (1 - progress));
            mPaint.setAlpha(alpha);
            canvas.drawText(mText, 0, mTextSize, mPaint);
        }
    }

    public void startAnimation() {
        if (!mAnimator.isRunning()) {
            mAnimator.start();
        }
    }

    public void setText(String text) {
        mText = text;
        invalidate();
    }
}

使用方法：
1. 在xml布局文件中添加LikeView：

<com.example.LikeView
    android:id="@+id/likeView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:likeText="Like"
    app:likeTextSize="30sp"
    app:likeTextColor="#FF0000"
    app:likeAnimationDuration="1000" />

2. 在代码中获取LikeView实例，并调用startAnimation方法开始动画：

LikeView likeView = findViewById(R.id.likeView);
likeView.startAnimation();