android studio 麦克风

回答: 在Android Studio中使用麦克风的代码中，引用[1]、[2]和[3]是指在com.baidu.speech.MicrophoneInputStream类中的不同构造函数的调用。根据这些引用，可以看出MicrophoneInputStream类有多个构造函数，其中包括一个私有构造函数和两个公共构造函数。这些构造函数的目的是为了创建一个用于录制音频的麦克风输入流。

相关问题

android studio获取mic

要在Android Studio中获取麦克风（mic）的输入，你可以使用Android的AudioRecord类。以下是一个示例代码片段，用于获取设备的麦克风音频输入：

import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;

public class MainActivity extends AppCompatActivity {
    private static final int RECORDER_SAMPLE_RATE = 44100; // 采样率
    private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO; // 单声道
    private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT; // 16位PCM编码

    private AudioRecord audioRecord;
    private boolean isRecording = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        // 初始化AudioRecord对象
        int bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLE_RATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);
        audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, RECORDER_SAMPLE_RATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING, bufferSize);
        
        // 开始录制
        startRecording();
    }
    
    private void startRecording() {
        isRecording = true;
        audioRecord.startRecording();
        
        // 开启一个线程读取录制的音频数据
        new Thread(new Runnable() {
            @Override
            public void run() {
                byte[] buffer = new byte[bufferSize];
                while (isRecording) {
                    int bytesRead = audioRecord.read(buffer, 0, bufferSize);
                    // 处理读取到的音频数据
                }
            }
        }).start();
    }
    
    private void stopRecording() {
        isRecording = false;
        audioRecord.stop();
        audioRecord.release();
    }
    
    @Override
    protected void onDestroy() {
        super.onDestroy();
        stopRecording();
    }
}

这段代码会在应用启动时初始化`AudioRecord`对象，并在单独的线程中持续读取麦克风输入的音频数据。你可以在`while`循环中处理读取到的音频数据，例如进行声音分析、录制等操作。记得在应用销毁时停止录制并释放资源。

android studio 录像

Androi Studi提供了许多API和框架来实现视频录制功能。以下是一个基本的录像功能的实现步骤：\n\1. 确保在AndroiManifes.xm文件中添加了相机和麦克风权限。\n\2. 在布局文件中添加一个SurfView元素，用于显示摄像头捕获的视频。\n\3. 在Activity中获取SurfView并将其设置为摄像头预览的目标。\n\4. 实例化MediRecorder类并设置视频源，输出格式，编码器，输出文件路径等参数。\n\5. 在按钮单击事件中启动MediRecorder并开始录制视频。\n\6. 在停止按钮单击事件中停止MediRecorder并释放资源。\n\以下是一个基本的录像功能的代码实现：\n\```jav\publi class MainActivity extends AppCompatActivity implements SurfHolder.Callback {\n\ priv Camer mCamer;\ priv SurfView mSurfView;\ priv SurfHolder mHolder;\ priv MediRecorder mMediRecorder;\ priv b isRecording = fals;\n\ @Overri\ pr voi onCr(Bu savedInstanceS) {\ super.onCr(savedInstanceS);\ setContentView(R.layou.activity_mai);\n\ mSurfView = (SurfView) findViewByI(R.i.surfView);\ mHolder = mSurfView.gHolder();\ mHolder.Callback(this);\ }\n\ @Overri\ publi voi surfCr(SurfHolder holder) {\ mCamer = Camer.op();\ mCamer.sDisplayOrientati(90);\ try {\ mCamer.sPreviewDisplay(holder);\ mCamer.starPreview();\ } catch (IOExcepti ) {\ .printStackTr();\ }\ }\n\ @Overri\ publi voi surfChang(SurfHolder holder, i form, i width, i heigh) {\n\ }\n\ @Overri\ publi voi surfDestroy(SurfHolder holder) {\ mCamer.stopPreview();\ mCamer.releas();\ mCamer = nu;\ }\n\ publi voi starRecording(View view) {\ if (isRecording) {\ retur;\ }\ try {\ mMediRecorder = new MediRecorder();\ mCamer.unlock();\ mMediRecorder.sCamer(mCamer);\ mMediRecorder.sAudiSour(MediRecorder.AudiSour.CAMCORDER);\ mMediRecorder.sViSour(MediRecorder.ViSour.CAMERA);\ mMediRecorder.setOutpuForm(MediRecorder.OutpuForm.MPEG_4);\ mMediRecorder.sAudiEncoder(MediRecorder.AudiEncoder.AAC);\ mMediRecorder.sViEncoder(MediRecorder.ViEncoder.H264);\ mMediRecorder.setOutpuFi(gOutpuMediFi().String());\ mMediRecorder.sPreviewDisplay(mHolder.gSurf());\ mMediRecorder.prepar();\ mMediRecorder.star();\ isRecording = tru;\ } catch (IOExcepti ) {\ .printStackTr();\ }\ }\n\ publi voi stopRecording(View view) {\ if (!isRecording) {\ retur;\ }\ mMediRecorder.stop();\ mMediRecorder.res();\ mMediRecorder.releas();\ mMediRecorder = nu;\ mCamer.lock();\ isRecording = fals;\ }\n\ priv stati Fi gOutpuMediFi() {\ Fi mediStoragDir = new Fi(Environm.getExternalStoragPubliDirectory(\ Environm.DIRECTORY_MOVIES), \MyCamerApp\");\ if (!mediStoragDir.exists()) {\ if (!mediStoragDir.mkdirs()) {\ retur nu;\ }\ }\ String timeStamp = new SimpleDateForm(\yyyyMM_HHmmss\").form(new D());\ Fi mediFi = new Fi(mediStoragDir.getPath() + Fi.separator +\ \VID_\ + timeStamp + \".mp4\");\ retur mediFi;\ }\}\```\n\