Android开发技术点4——模拟声纹波动效果

最近在做声纹相关的东西，在画页面时，因为设计不在家，所以就在即琢磨着，突发奇想的如果能模拟声纹波动的效果，岂不是很形象，所以在这边做了个模拟声纹波动的动画，但是首先声明，不是真的检测外部的声音而实时波动的，仅仅是个模拟声纹的动画效果，直接上代码：
layout xml:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#ffffff"    tools:context="winter.winterdemos.PathViewActivity">    <winter.winterdemos.WaveView        android:id="@+id/pathView"        android:layout_width="360dp"        android:layout_height="200dp"        android:layout_centerInParent="true"        android:layout_marginLeft="20dp"        android:layout_marginRight="20dp"/>    <TextView        android:layout_width="500dp"        android:layout_height="2dp"        android:background="@color/title_color"        android:layout_centerInParent="true" /></RelativeLayout>

colors:

    <color name="title_color">#0088FE</color>

WaveView:

package winter.winterdemos;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.os.Handler;import android.os.Message;import android.util.AttributeSet;import android.util.Log;import android.view.View;/** * Created by Winter on 2016/6/15. */public class WaveView extends View {    private final static String TAG = "Winter";    private Paint paint;    private Path path;    private int count = 0;    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what){                case 0x23:                    count+=5;                    if(count>=360){                        count=0;                    }                    invalidate();//通过更改count 值，在重新画贝塞尔曲线，已达到动态的效果                    sendEmptyMessageDelayed(0x23,400);                    break;            }        }    };    public WaveView(Context context, AttributeSet attrs) {        super(context, attrs);        paint = new Paint();        paint.setAntiAlias(true);        paint.setTextSize(30);        paint.setStyle(Paint.Style.STROKE);        paint.setColor(getResources().getColor(R.color.title_color));        paint.setDither(true);//设定是否使用图像抖动处理，会使绘制出来的图片颜色更加平滑和饱满，图像更加清晰        paint.setStrokeWidth(2);        path = new Path();        handler.sendEmptyMessageDelayed(0x23, 1000);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        path.reset();        path.moveTo(0, 100);        int size = count / 17;        for (int i = 0;i <= size ; i++ ){//动态生成二阶贝塞尔曲线，模拟声纹波            path.rQuadTo(count % 17, -100, 2*(count % 17), 0);//上16            path.rQuadTo(count % 17, 100, 2*(count % 17), 0);//下10            path.rQuadTo(count % 17, -60, 2*(count % 17), 0);//上18            path.rQuadTo(count % 17, 60, 2*(count % 17), 0);//下20            path.rQuadTo(count % 17, -35, 2*(count % 17), 0);//上10            path.rQuadTo(count % 17, 30, 2*(count % 17), 0);//下8            path.rQuadTo(count % 17, -150, 2*(count % 17), 0);//上6            path.rQuadTo(count % 17, 150, 2*(count % 17), 0);//下8        }        for (int i = 0; i < 10; i++) {//混淆近一些固定的声纹波，显得真实一下            path.rQuadTo(8, -100, 16, 0);//上16            path.rQuadTo(5, 100, 10, 0);//下10            path.rQuadTo(5, -60, 18, 0);//上18            path.rQuadTo(10, 40, 20, 0);//下20            path.rQuadTo(5, -15, 10, 0);//上10            path.rQuadTo(4, 30, 8, 0);//下8            path.rQuadTo(8, 0, 30, 0);//上30            path.rQuadTo(3, -80, 6, 0);//上6            path.rQuadTo(4, 150, 8, 0);//下8            path.rQuadTo(6, -120, 12, 0);//上12            path.rQuadTo(7, 130, 14, 0);//下14            path.rQuadTo(8, -130, 20, 0);//上20            path.rQuadTo(10, 60, 25, 0);//下25            path.rQuadTo(8, 0, 63, 0);//上63  260        }        canvas.drawPath(path, paint);    }}