Android之录音工具类
16lz
2021-01-23
/** * 录音工具类 * * @author rendongwei * */public class RecordUtil { private static final int SAMPLE_RATE_IN_HZ = 8000; private MediaRecorder recorder = new MediaRecorder(); // 录音的路径 private String mPath; public RecordUtil(String path) { mPath = path; } /** * 开始录音 * * @throws IOException */ public void start() throws IOException { String state = android.os.Environment.getExternalStorageState(); if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) { throw new IOException("SD Card is not mounted,It is " + state + "."); } File directory = new File(mPath).getParentFile(); if (!directory.exists() && !directory.mkdirs()) { throw new IOException("Path to file could not be created"); } recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setAudioSamplingRate(SAMPLE_RATE_IN_HZ); recorder.setOutputFile(mPath); recorder.prepare(); recorder.start(); } /** * 结束录音 * * @throws IOException */ public void stop() throws IOException { recorder.stop(); recorder.release(); } /** * 获取录音时间 * * @return */ public double getAmplitude() { if (recorder != null) { return (recorder.getMaxAmplitude()); } return 0; }}
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