代码
请指导我如何存储（音频）文件，以便我可以在媒体播放器上将它们用作播放列表，或者告诉我是否做错了什么，我之前没有处理过文件，所以任何简洁和基本的解释将不胜感激。提前致谢
ps，我能够读取 logcat 中的文件名，这意味着我正在获取或下载它们？
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
protected Void doInBackground(String... strings) {
try {
// mediaPlayer.setDataSource("http://www.archive.org/download/i_do_not_love_thee_norton_librivox/i_do_not_love_thee_norton_librivox_64kb_mp3.zip");
// mediaPlayer.prepare();
// duration = mediaPlayer.getDuration();
//TODO: CONTINUE FROM HERE (THE DATA HAS BEEN DOWNLOADED IN THE BACKGROUND THREAD)
//InputStream fis = new URL("http://www.archive.org/download/i_do_not_love_thee_norton_librivox/i_do_not_love_thee_norton_librivox_64kb_mp3.zip").openConnection().getInputStream();
URL url = new URL("http://www.archive.org/download/sonnets_portugese_knf_librivox/sonnets_portugese_knf_librivox_64kb_mp3.zip");
URLConnection urlConnection = url.openConnection();
//URL url = new URL("http://www.archive.org/download/tristan_iseult_librivox/tristan_iseult_librivox_64kb_mp3.zip/");
//URLConnection connection = url.openConnection();
ZipInputStream zis = new ZipInputStream(urlConnection.getInputStream());
ZipEntry ze;
//TODO: SETTING UP PROGRESS
//
int count = 0;
while ((ze = zis.getNextEntry()) != null) {
count++;
/**
* FILES ARE NOT IN ORDER AT THE TIME OF DOWNLOADING
*/
//TODO: HOW TO SAVE EACH ZIPENTRY (AUDIO FILE) IN ORDER TO PLAY THEM WITH MEDIAPLAYER?
name += count + ze.getName() + "\n";
//publishProgress(""+(int)((total*100)/lenghtOfFile));
Log.d("This", "doInBackground: " + ze.getName() + "\n");// + " Size: " + ze.getSize() + " Time: " + ze.getTime()
//zis.closeEntry();
}
zis.close();
} catch (IOException e) {
Log.d("This", "doInBackground: " + e.getMessage());
}
return null;
}
答案 0 :(得分：-1)
您正在尝试下载并解压缩文件。有两种方法
<块引用>我不确定没有。 2 行不行。我正在正确查看您的源代码。不幸的是，我注意到您可以获取文件名，但是您似乎无法将其保存到文件资源管理器中。我不确定我是否错了。我是说那个原因，我们不会按照你写的方式下载。
我在这里implementing一些源代码
public class DownloadVideoAsyncTask extends AsyncTask<String, Integer, String> {
private Context mContext;
public DownloadVideoAsyncTask(Context context) {
mContext = context;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String... sUrl) {
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(sUrl[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
}
// this will be useful to display download percentage
// might be -1: server did not report the length
int fileLength = connection.getContentLength();
// download the file
input = connection.getInputStream();
//output = new FileOutputStream("/data/data/com.example.vadym.test1/textfile.txt");
output = new FileOutputStream(mContext.getFilesDir() + "/file.mp4");
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled()) {
input.close();
return null;
}
total += count;
// publishing the progress....
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
} catch (Exception e) {
return e.toString();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
} catch (IOException ignored) {
}
if (connection != null)
connection.disconnect();
}
return null;
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
Log.d("ptg", "onProgressUpdate: " + values[0]);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
}
}
我有更简单的源代码。但是，我必须下载那个。可能需要很长时间。虽然我会努力。在那之前，你试试吧。
如何以编程方式解压缩？我正在实施两次网站链接
如果你完全相信java，那么我希望你能在android studio中实现codejava的源代码。
private boolean unpackZip(String path, String zipname)
{
InputStream is;
ZipInputStream zis;
try
{
is = new FileInputStream(path + zipname);
zis = new ZipInputStream(new BufferedInputStream(is));
ZipEntry ze;
while((ze = zis.getNextEntry()) != null)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int count;
String filename = ze.getName();
FileOutputStream fout = new FileOutputStream(path + filename);
// reading and writing
while((count = zis.read(buffer)) != -1)
{
baos.write(buffer, 0, count);
byte[] bytes = baos.toByteArray();
fout.write(bytes);
baos.reset();
}
fout.close();
zis.closeEntry();
}
zis.close();
}
catch(IOException e)
{
e.printStackTrace();
return false;
}
return true;
}
这样您就可以解压缩文件。我认为这个源代码的输出会在主文件上重写。
编辑： 如何下载
File locationImage = new File(Environment.getExternalStorageDirectory()
+ "/Socio-Book/pictures/"+name+".png");
//save image to internal storage
direct = new File(Environment.getExternalStorageDirectory()
+ "/Socio-Book/pictures");
if (!direct.exists()) {
direct.mkdirs();
}
//save data to sqlite DB
boolean check=mydb.insertData(id,name,pass);
//download image or not
if(!locationImage.exists()) {
DownloadManager mgr = (DownloadManager) getApplicationContext().getSystemService(Context.DOWNLOAD_SERVICE);
Uri downloadUri = Uri.parse(Constant.BASE_URL+"/y_chat/sign_up/"+name+"/profile.png");
DownloadManager.Request request = new DownloadManager.Request(
downloadUri);
request.setAllowedNetworkTypes(
DownloadManager.Request.NETWORK_WIFI
| DownloadManager.Request.NETWORK_MOBILE)
.setAllowedOverRoaming(false).setTitle("Image")
.setDestinationInExternalPublicDir("/Socio-Book/pictures", name + ".png");
mgr.enqueue(request);
以下源代码需要更多说明
Uri downloadUri = Uri.parse(Constant.BASE_URL+"/y_chat/sign_up/"+name+"/profile.png");
DownloadManager.Request request = new DownloadManager.Request(
downloadUri);
它来自我上面的源代码。
Uri 是文件的位置（链接）。我在这里写的 Constant.BASE_URL 是网站链接。其他是文件的位置。
Uri downloadUri = Uri.parse("http://www.archive.org/download/sonnets_portugese_knf_librivox/sonnets_portugese_knf_librivox_64kb_mp3.zip");