android 简单实现录音功能

1. 一.xml页面布局

<?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"
    android:padding="16dp">

    <!-- 显示数字 "1" 的 TextView -->
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="1"
        android:textSize="24sp"
        android:gravity="center"
        android:paddingBottom="16dp"/>

    <!-- 开始录音按钮 -->
    <Button
        android:id="@+id/startRecord"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="开始录音"
        android:textSize="18sp"
        android:padding="12dp"
        android:layout_marginBottom="8dp"/>

    <!-- 停止录音按钮 -->
    <Button
        android:id="@+id/stopRecord"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="停止录音"
        android:textSize="18sp"
        android:padding="12dp"
        android:layout_marginBottom="8dp"/>

    <!-- 开始播放按钮 -->
    <Button
        android:id="@+id/startPlay"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="开始播放"
        android:textSize="18sp"
        android:padding="12dp"
        android:layout_marginBottom="8dp"/>

    <!-- 停止播放按钮 -->
    <Button
        android:id="@+id/stopPlay"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="停止播放"
        android:textSize="18sp"
        android:padding="12dp"
        android:layout_marginBottom="8dp"/>

</LinearLayout>

1. 2.对应的java页面

2. public class MainActivity extends AppCompatActivity {
   
       private static final String LOG_TAG = "MainActivity";
       // 语音文件保存路径
       private String FileName = null;
   
       // 界面控件
       private Button startRecord;
       private Button startPlay;
       private Button stopRecord;
       private Button stopPlay;
   
       // 语音操作对象
       private MediaPlayer mPlayer = null;
       private MediaRecorder mRecorder = null;
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
   
           // 初始化控件
           startRecord = findViewById(R.id.startRecord);
           startPlay = findViewById(R.id.startPlay);
           stopRecord = findViewById(R.id.stopRecord);
           stopPlay = findViewById(R.id.stopPlay);
   
           // 设置按钮监听器
           startRecord.setOnClickListener(new startRecordListener());
           stopRecord.setOnClickListener(new stopRecordListener());
           startPlay.setOnClickListener(new startPlayListener());
           stopPlay.setOnClickListener(new stopPlayListener());
   
           // 设置语音文件保存路径
           FileName = getExternalFilesDir(Environment.DIRECTORY_MUSIC).getAbsolutePath() + "/audiorecordtest.3gp";
   
           // 请求权限
           requestPermissions();
       }
   
       // 请求录音和存储权限
       private void requestPermissions() {
           if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED
                   || ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
   
               ActivityCompat.requestPermissions(this,
                       new String[]{Manifest.permission.RECORD_AUDIO, Manifest.permission.WRITE_EXTERNAL_STORAGE},
                       1);
           }
       }
   
       // 开始录音
       class startRecordListener implements View.OnClickListener {
           @Override
           public void onClick(View v) {
               // 检查权限
               if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
                   Log.e(LOG_TAG, "没有录音权限！");
                   return;
               }
   
               mRecorder = new MediaRecorder();
               try {
                   mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                   mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                   mRecorder.setOutputFile(FileName);
                   mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                   mRecorder.prepare();
                   mRecorder.start();
               } catch (IOException e) {
                   Log.e(LOG_TAG, "录音准备或启动失败：" + e.getMessage());
               }
           }
       }
   
       // 停止录音
       class stopRecordListener implements View.OnClickListener {
           @Override
           public void onClick(View v) {
               if (mRecorder != null) {
                   try {
                       mRecorder.stop();
                   } catch (RuntimeException e) {
                       Log.e(LOG_TAG, "停止录音失败：" + e.getMessage());
                   } finally {
                       mRecorder.release();
                       mRecorder = null;
                   }
               }
           }
       }
   
       // 开始播放
       class startPlayListener implements View.OnClickListener {
           @Override
           public void onClick(View v) {
               mPlayer = new MediaPlayer();
               try {
                   mPlayer.setDataSource(FileName);
                   mPlayer.prepare();
                   mPlayer.start();
               } catch (IOException e) {
                   Log.e(LOG_TAG, "播放失败：" + e.getMessage());
               }
           }
       }
   
       // 停止播放
       class stopPlayListener implements View.OnClickListener {
           @Override
           public void onClick(View v) {
               if (mPlayer != null) {
                   mPlayer.release();
                   mPlayer = null;
               }
           }
       }
   
       @Override
       public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
           super.onRequestPermissionsResult(requestCode, permissions, grantResults);
   
           if (requestCode == 1) {
               if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                   Log.d(LOG_TAG, "权限已授予");
               } else {
                   Log.e(LOG_TAG, "权限被拒绝");
               }
           }
       }
   }最后不要忘记加对应的请求权限