如何知道Android中录音的长度
我使用以下代码来录制音频：
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("audio/*");
startActivityForResult(Intent.createChooser(intent, "Select audio source"), CardList.ACTIVITY_RECDAUDIO);
当结果返回时，我执行以下操作：
Uri u = intent.getData();
String audioUri = u.getPath();
InputStream in = new BufferedInputStream(this.getContentResolver().openInputStream(u));
我想知道录制的时长（以秒为单位）。是否可以以某种方式查询这个？如果一切都失败了，我可以以编程方式播放剪辑并计时，但如果可能的话，我更喜欢更直接的方法。谢谢！
I am using the following code to record audio:
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("audio/*");
startActivityForResult(Intent.createChooser(intent, "Select audio source"), CardList.ACTIVITY_RECDAUDIO);
When the result comes back I do the following:
Uri u = intent.getData();
String audioUri = u.getPath();
InputStream in = new BufferedInputStream(this.getContentResolver().openInputStream(u));
I would like to know how long the recording is in seconds. Is it possible to query this somehow? If all else fails I can play the clip programatically and time it, but I would prefer a more direct method if possible. Thanks!
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我不知道这对你来说是否足够快。但如果您不知道，您不必真正玩它。创建
MediaPlayer实例并设置文件路径和调用getDuration()就足够了。I don't know if this is fast enough for you. But in case you don't know - you don't have to actually play it. It is enough to create
MediaPlayerinstance and set the path of the file and the callgetDuration().我通过使用输入流来执行此操作：InputStream 上的 is.available() 为我提供了长度。
I do this by using my input stream: is.available() on InputStream is gives me the length.