Android边录边播 Android实现边录边播功能
谈情不如逗狗. 人气:0想了解Android实现边录边播功能的相关内容吗,谈情不如逗狗.在本文为您仔细讲解Android边录边播的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Android,边录边播,下面大家一起来学习吧。
Android可以通过MediaRecorder和AudioRecord这两个工具来实现录音,MediaRecorder直接把麦克风的数据存到文件,并且能够直接进行编码(如AMR,MP3等),而AudioRecord则是读取麦克风的音频流。本文使用AudioRecord读取音频流,使用AudioTrack播放音频流,通过“边读边播放”以及增大音量的方式来实现一个简单的助听器程序。
PS:由于目前的Android模拟器还不支持AudioRecord,因此本程序需要编译之后放到真机运行。
Activity_layout:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/bt_yinpinhuilu_testing_exit" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Close" /> </LinearLayout>
MainActivity:
import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; import android.Manifest; 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.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import java.util.LinkedList; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private static final String TAG = "ktv"; /** * 按钮 */ private Button bt_exit; /** * AudioRecord 写入缓冲区大小 */ protected int m_in_buf_size; /** * 录制音频对象 */ private AudioRecord m_in_rec; /** * 录入的字节数组 */ private byte[] m_in_bytes; /** * 存放录入字节数组的大小 */ private LinkedList<byte[]> m_in_q; /** * AudioTrack 播放缓冲大小 */ private int m_out_buf_size; /** * 播放音频对象 */ private AudioTrack m_out_trk; /** * 播放的字节数组 */ private byte[] m_out_bytes; /** * 录制音频线程 */ private Thread record; /** * 播放音频线程 */ private Thread play; /** * 让线程停止的标志 */ private boolean flag = true; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); this.setTitle("音频回路"); requestAllPower(); Log.d("dfdfd", "333333333333"); init(); record = new Thread(new recordSound()); play = new Thread(new playRecord()); // 启动录制线程 record.start(); // 启动播放线程 play.start(); } private void init() { bt_exit = findViewById(R.id.bt_yinpinhuilu_testing_exit); Log.i(TAG, "bt_exit====" + bt_exit); bt_exit.setOnClickListener(this); // AudioRecord 得到录制最小缓冲区的大小 m_in_buf_size = AudioRecord.getMinBufferSize(8000, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); // 实例化播放音频对象 m_in_rec = new AudioRecord(MediaRecorder.AudioSource.MIC, 8000, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, m_in_buf_size); // 实例化一个字节数组,长度为最小缓冲区的长度 m_in_bytes = new byte[m_in_buf_size]; // 实例化一个链表,用来存放字节组数 m_in_q = new LinkedList<byte[]>(); // AudioTrack 得到播放最小缓冲区的大小 m_out_buf_size = AudioTrack.getMinBufferSize(8000, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); // 实例化播放音频对象 m_out_trk = new AudioTrack(AudioManager.STREAM_MUSIC, 8000, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, m_out_buf_size, AudioTrack.MODE_STREAM); // 实例化一个长度为播放最小缓冲大小的字节数组 m_out_bytes = new byte[m_out_buf_size]; } public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.bt_yinpinhuilu_testing_exit: flag = false; m_in_rec.stop(); m_in_rec = null; m_out_trk.stop(); m_out_trk = null; this.finish(); } } /** * 录音线程 */ class recordSound implements Runnable { @Override public void run() { Log.i(TAG, "........recordSound run()......"); byte[] bytes_pkg; // 开始录音 m_in_rec.startRecording(); while (flag) { m_in_rec.read(m_in_bytes, 0, m_in_buf_size); bytes_pkg = m_in_bytes.clone(); Log.i(TAG, "........recordSound bytes_pkg==" + bytes_pkg.length); if (m_in_q.size() >= 2) { m_in_q.removeFirst(); } m_in_q.add(bytes_pkg); } } } /** * 播放线程 */ class playRecord implements Runnable { @Override public void run() { // TODO Auto-generated method stub Log.i(TAG, "........playRecord run()......"); byte[] bytes_pkg = null; // 开始播放 m_out_trk.play(); while (flag) { try { m_out_bytes = m_in_q.getFirst(); bytes_pkg = m_out_bytes.clone(); m_out_trk.write(bytes_pkg, 0, bytes_pkg.length); } catch (Exception e) { e.printStackTrace(); } } } } /** * 录音哦动态权限 */ public void requestAllPower() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) { if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.RECORD_AUDIO)) { } else { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO, Manifest.permission.READ_EXTERNAL_STORAGE}, 1); } } } @Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == 1) { for (int i = 0; i < permissions.length; i++) { Toast.makeText(this, "" + "权限" + permissions[i] + "申请成功", Toast.LENGTH_SHORT).show(); } } } }
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.test.speex"> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.RECORD_AUDIO" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
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