在Android平台上,要判断一段语音的时间,你可以通过使用Android的`MediaRecorder`类来录制语音并获取其时长,或者使用`MediaPlayer`类来播放语音文件并获取其时长。以下是使用这两种方法的示例代码:
1. 使用`MediaRecorder`录制语音并获取时长:
```java
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import java.io.IOException;
public class AudioRecorder {
private MediaRecorder mediaRecorder;
private boolean isRecording = false;
public void startRecording(String outputFile) {
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setOutputFile(outputFile);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mediaRecorder.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaRecorder.start();
isRecording = true;
}
public void stopRecording() {
if (mediaRecorder != null && isRecording) {
mediaRecorder.stop();
mediaRecorder.release();
mediaRecorder = null;
isRecording = false;
}
}
public int getRecordedTimeInSeconds() {
return mediaRecorder != null ? mediaRecorder.getMaxAmplitude() / 1000 : 0;
}
}
```
使用这个类来录制语音并获取其时长:
```java
AudioRecorder audioRecorder = new AudioRecorder();
audioRecorder.startRecording("outputFile.3gp");
// 假设录制了一段时间后停止录制
audioRecorder.stopRecording();
// 获取录制的语音时长(秒)
int durationInSeconds = audioRecorder.getRecordedTimeInSeconds();
```
2. 使用`MediaPlayer`播放语音文件并获取时长:
```java
import android.media.MediaPlayer;
import java.io.IOException;
public class AudioPlayer {
private MediaPlayer mediaPlayer;
public void playAudio(String audioFile) {
mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(audioFile);
mediaPlayer.prepare();
mediaPlayer.start();
} catch (IOException e) {
e.printStackTrace();
}
}
public int getAudioDurationInSeconds(String audioFile) {
MediaPlayer tempMediaPlayer = new MediaPlayer();
try {
tempMediaPlayer.setDataSource(audioFile);
tempMediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
int duration = tempMediaPlayer.getDuration() / 1000; // 将毫秒转换为秒
tempMediaPlayer.release();
return duration;
}
}
```
使用这个类来播放语音文件并获取其时长:
```java
AudioPlayer audioPlayer = new AudioPlayer();
audioPlayer.playAudio("audioFile.3gp");
// 假设播放了一段时间后停止播放
audioPlayer.stopAudio();
// 获取语音文件的时长(秒)
int durationInSeconds = audioPlayer.getAudioDurationInSeconds("audioFile.3gp");
```
这些代码示例可以帮助你在Android平台上获取录制语音或语音文件的时长。