Android 手机做麦克风扩音器demo

最新推荐文章于 2025-06-06 11:03:25 发布

原创

最新推荐文章于 2025-06-06 11:03:25 发布 · 7.1k 阅读

12 ·

CC 4.0 BY-SA版权

文章标签：

#有趣demo #麦克风功能 #扩音器 #录音播放功能

本文介绍了如何利用Android设备实现麦克风扩音器功能，通过录音并实时播放音频流来达到扩音效果。作者分享了实现这一功能的基本思路，并提到了布局文件和声音大小显示波段的代码来源。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

前两天忽略想到的一个功能，手机作为麦克风扩音器，我认为这是一个很有意思的事情，在网上也找到了一个这样的apk但我还是想自己动手实现。

实现麦克风的原来很简单，通过录音功能将声音录下来再通过播放功能将录到音频流实时播放出来，最终达到麦克风扩音功能。

效果如下

布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:voiceView="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/holo_blue_bright">

    <com.carlos.voiceline.mylibrary.VoiceLineView
        android:id="@+id/voicLine"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:background="@android:color/white"
        voiceView:maxVolume="200"
        voiceView:middleLine="@android:color/black"
        voiceView:middleLineHeight="1dp"
        voiceView:fineness="three"
        voiceView:rectSpace="2dp"
        voiceView:rectWidth="5dp"
        voiceView:sensibility="four"
        voiceView:viewMode="line"
        voiceView:lineSpeed="90"
        voiceView:voiceLine="@android:color/holo_green_dark" />
    <Button
        android:id="@+id/start"
        android:layout_alignParentBottom="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="录音"
        />
</RelativeLayout>

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import com.carlos.voiceline.mylibrary.VoiceLineView;

public class MainActivity extends AppCompatActivity implements Runnable {

    String TAG = "MainActivity";
    static final int frequency = 44100;
    static final int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
    static final int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;

    int recBufSize = AudioRecord.getMinBufferSize(frequency,
            channelConfiguration, audioEncoding)*2;
    int plyBufSize = AudioTrack.getMinBufferSize(frequency,
            channelConfiguration, audioEncoding)*2;
    private boolean isAlive = true;
    private VoiceLineView voiceLineView;
    private Button start;

    AudioRecord audioRecord;
    AudioTrack audioTrack;
    Thread thread = null;

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(msg != null)
                 voiceLineView.setVolume(msg.what);//主线程更新分贝大小
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        voiceLineView = (VoiceLineView) findViewById(R.id.voicLine);
        start = (Button) findViewById(R.id.start);
        checkPermission(this);
        start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(thread == null) {
                    thread = new Thread(MainActivity.this);//启动线程
                    isAlive = true;
                    thread.start();
                    st