package gg.bw.com.wangshu20190404;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.View;
public class WaterView2 extends View {
Paint paint = new Paint();
Path path = new Path();
float mt;
public WaterView2(Context context) {
super(context);
paint.setAntiAlias(true);
}
public WaterView2(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
path.reset();
path.moveTo(getLeft(),getBottom());
float v = (float) (Math.PI *2/ getRight());
mt-=0.1;
for (int i = 0; i <=getRight() ; i+=20) {
path.lineTo(i, (float) (10 * Math.cos(v * i +mt)+ 10));
}
path.lineTo(getRight(),getBottom());
canvas.drawPath(path,paint);
postInvalidateDelayed(20);
}
}