Android Studio实现输入音频文件输出音频内容
时间: 2023-08-05 21:16:41 浏览: 59
要实现输入音频文件输出音频内容,你需要用到Android的AudioRecord和AudioTrack类。这里提供一个简单的实现过程:
1. 首先,你需要在AndroidManifest.xml文件中添加录音权限:
```xml
<uses-permission android:name="android.permission.RECORD_AUDIO" />
```
2. 在你的Activity中创建AudioRecord实例,设置音频参数,开始录音:
```java
int audioSource = MediaRecorder.AudioSource.MIC;
int sampleRate = 44100;
int channelConfig = AudioFormat.CHANNEL_IN_MONO;
int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
int bufferSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat);
AudioRecord audioRecord = new AudioRecord(audioSource, sampleRate, channelConfig, audioFormat, bufferSize);
byte[] buffer = new byte[bufferSize];
audioRecord.startRecording();
```
3. 接下来,你需要创建一个输出文件,将录制的音频数据写入到该文件中:
```java
File outputFile = new File(Environment.getExternalStorageDirectory(), "output.pcm");
FileOutputStream outputStream = new FileOutputStream(outputFile);
while (true) {
int read = audioRecord.read(buffer, 0, bufferSize);
outputStream.write(buffer, 0, read);
}
```
4. 最后,你可以使用AudioTrack类将输出文件中的音频数据播放出来:
```java
int streamType = AudioManager.STREAM_MUSIC;
int mode = AudioTrack.MODE_STREAM;
int sampleRate = 44100;
int channelConfig = AudioFormat.CHANNEL_OUT_MONO;
int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
int bufferSize = AudioTrack.getMinBufferSize(sampleRate, channelConfig, audioFormat);
AudioTrack audioTrack = new AudioTrack(streamType, sampleRate, channelConfig, audioFormat, bufferSize, mode);
audioTrack.play();
File inputFile = new File(Environment.getExternalStorageDirectory(), "output.pcm");
FileInputStream inputStream = new FileInputStream(inputFile);
byte[] buffer = new byte[bufferSize];
while (inputStream.read(buffer) != -1) {
audioTrack.write(buffer, 0, buffer.length);
}
```
注意:这只是一个简单的实现过程,实际应用中你需要处理更多的异常情况和错误处理,以及对音频数据的解码和编码等。