android 简单实现录音功能

一.xml页面布局

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<?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>

2.对应的java页面

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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