android吹一吹功能的实现，利用麦克风去监听频率的变化。
16lz
2021-01-23
android吹一吹功能的实现,主要是通过监听麦克风频率变化来实现的，源码下载地址： 主要是通过一个线程去监听麦克风的变化来确定吹一吹的功能
接下来看下主要代码：RecordThread.java
package com.li;import android.media.AudioFormat;import android.media.AudioRecord;import android.media.MediaRecorder;import android.os.Message; //import com.bshark.letmessage.ui.BlowActivity.MyHandler;//import com.bshark.letmessage.util.Parameter;import com.li.BlowActivity.MyHandler; public class RecordThread extends Thread { private AudioRecord ar; private int bs = 100; private static int SAMPLE_RATE_IN_HZ = 8000; private Message msg; private int number = 1; private int tal = 1; private MyHandler handler; private long currenttime; private long endtime; private long time = 1; //到达该值之后 触发事件 private static int BLOW_ACTIVI=3000; public RecordThread(MyHandler myHandler) { super(); bs = AudioRecord.getMinBufferSize(SAMPLE_RATE_IN_HZ, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); ar = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLE_RATE_IN_HZ, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bs); handler = myHandler; } @Override public void run() { try { ar.startRecording(); Parameter.isblow = true; // 用于读取的 buffer byte[] buffer = new byte[bs]; while (Parameter.isblow) { number++; sleep(8); currenttime = System.currentTimeMillis(); int r = ar.read(buffer, 0, bs) + 1; int v = 0; for (int i = 0; i < buffer.length; i++) { v += (buffer[i] * buffer[i]); } int value = Integer.valueOf(v / (int) r); tal = tal + value; endtime = System.currentTimeMillis(); time = time + (endtime - currenttime); if (time >= 500 || number > 5) { int total = tal / number; if (total > BLOW_ACTIVI) { //发送消息通知到界面 触发动画 //利用传入的handler 给界面发送通知 BlowActivity.i+=1; handler.sendEmptyMessage(0); //改变i的值后，发送一个空message到主线程 // number = 1; tal = 1; time = 1; } } } ar.stop(); ar.release(); bs=100; } catch (Exception e) { e.printStackTrace(); } }}源码下载地址：
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