android:模拟水波效果的自己定义View

Github地址：https://github.com/nuptboyzhb/WaterWaveView

欢迎Fork。欢迎Star

1.先看效果

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbnVwdDEyMzQ1Njc4OQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

2.再看关键代码

描绘函数y = Asin(wx+d)+offset

/**
	 * 使用路径描绘绘制的区域
	 *
	 * @return
	 */
	private Path getFristWavePath() {
		// 绘制区域1的路径
		if (firstWavePath == null) {
			firstWavePath = new Path();
		}
		firstWavePath.reset();
		firstWavePath.moveTo(0, height);// 移动到左下角的点
		for (float x = 0; x <= width; x += X_STEP) {
			float y = (float) (waveHeight * Math.sin(omega * x + moveWave) + waveHeight)
					+ heightOffset;
			firstWavePath.lineTo(x, y);
		}
		firstWavePath.lineTo(width, 0);
		firstWavePath.lineTo(width, height);
		return firstWavePath;
	}

很多其它交流

Android开发联盟QQ群：272209595