帮我用Android Studio写一个动态心形代码
时间: 2023-04-04 17:02:39 浏览: 123
好的,以下是动态心形代码:
```
public class HeartView extends View {
private Paint mPaint;
private Path mPath;
private float mWidth;
private float mHeight;
private float mScale = 1f;
public HeartView(Context context) {
super(context);
init();
}
public HeartView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public HeartView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setColor(Color.RED);
mPath = new Path();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
mWidth = MeasureSpec.getSize(widthMeasureSpec);
mHeight = MeasureSpec.getSize(heightMeasureSpec);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mPath.reset();
float x = 0;
float y = 0;
float t = 0;
float dt = 0.01f;
while (t <= Math.PI * 2) {
float r = (float) (Math.sin(t) * Math.sqrt(Math.abs(Math.cos(t))) / (Math.sin(t) + 7 / 5f) - 2 * Math.sin(t) + 2);
float x1 = (float) (r * Math.cos(t));
float y1 = (float) (-r * Math.sin(t));
if (t == 0) {
x = x1;
y = y1;
mPath.moveTo(x, y);
} else {
mPath.lineTo(x1, y1);
}
x = x1;
y = y1;
t += dt;
}
canvas.save();
canvas.translate(mWidth / 2, mHeight / 2);
canvas.scale(mScale, mScale);
canvas.drawPath(mPath, mPaint);
canvas.restore();
postInvalidateDelayed(10);
}
public void setScale(float scale) {
mScale = scale;
invalidate();
}
}
```
你可以将这段代码复制到 Android Studio 中的一个新的 Java 类中,然后在你的布局文件中添加一个自定义视图,即可看到动态心形效果。
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