有没有人可以帮我开发具有播放和暂停功能的灵活录音机?
注意:我使用过PauseResumeAudioRecorder。这是好的但不灵活,因为当我停止录制然后我的文件将是腐败。我也使用过MP4Parser库,但它需要花费大量时间来合并两个大文件。
这是我用来合并两个文件的Mp4Wrapper类。
public final class Mp4ParserWrapper {
public static final String TAG = "Mp4ParserWrapper";
public static final int FILE_BUFFER_SIZE = 1024;
private Mp4ParserWrapper() {
}
/**
* Appends mp4 audios/videos: {@code anotherFileName} to {@code mainFileName}.
*
* @param mainFileName The first file path.
* @param anotherFileName The second file path.
*
* @return true if the operation was made successfully.
*/
public static boolean append(String mainFileName, String anotherFileName){
try {
File targetFile = new File(mainFileName);
File anotherFile = new File(anotherFileName);
if (targetFile.exists() && targetFile.length() > 0) {
String tmpFileName = mainFileName + ".tmp";
append(mainFileName, anotherFileName, tmpFileName);
copyFile(tmpFileName, mainFileName);
return anotherFile.delete() && new File(tmpFileName).delete();
} else {
if (!targetFile.exists()) {
if (!targetFile.getParentFile().exists()) {
if (!targetFile.getParentFile().mkdirs()) {
return false;
}
}
if (!targetFile.createNewFile()) {
return false;
}
}
copyFile(anotherFileName, mainFileName);
return anotherFile.delete();
}
} catch (IOException e) {
e.printStackTrace();
Log.e(TAG, "Appending two mp4 files failed with exception", e);
return false;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
private static void copyFile(final String from, final String destination)
throws IOException {
FileInputStream in = new FileInputStream(from);
FileOutputStream out = new FileOutputStream(destination);
copy(in, out);
in.close();
out.close();
}
private static void copy(FileInputStream in, FileOutputStream out) throws IOException {
byte[] buf = new byte[FILE_BUFFER_SIZE];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
}
public static void append(
final String firstFile,
final String secondFile,
final String newFile) throws Exception {
final Movie movieA = MovieCreator.build(new FileDataSourceImpl(new File(secondFile)));
final Movie movieB = MovieCreator.build(new FileDataSourceImpl(firstFile));
final Movie finalMovie = new Movie();
final List<Track> movieOneTracks = movieA.getTracks();
final List<Track> movieTwoTracks = movieB.getTracks();
for (int i = 0; i < movieOneTracks.size() || i < movieTwoTracks.size(); ++i) {
finalMovie.addTrack(new AppendTrack(movieTwoTracks.get(i), movieOneTracks.get(i)));
}
final Container container = new DefaultMp4Builder().build(finalMovie);
final FileOutputStream fos = new FileOutputStream(new File(String.format(newFile)));
final WritableByteChannel bb = Channels.newChannel(fos);
container.writeContainer(bb);
fos.close();
}
}