Play media from from zip file without unzipping

android, android-mediaplayer, zip

Solution

You can use The APK Expansion Zip Library to do that even if you do not use APK Expansions in your app.

Follow this documentation to get the library: Using the APK Expansion Zip Library

Zip your sound files without compression using your favorite zip tool.

Use this code to load the music:

ZipResourceFile expansionFile = new ZipResourceFile("myZipFile.zip");
AssetFileDescriptor assetFileDescriptor = expansionFile.getAssetFileDescriptor("myMusic.mp3");
try {
    mediaPlayer.setDataSource(assetFileDescriptor.getFileDescriptor());
    mediaPlayer.prepare();
    mediaPlayer.start();
}
catch (IOException e) {
    // Handle exception
}

Problem

I know there are already a few questions like this on SO, but they relate to extracting the file before playing it. In the Android docs here it explains that you can play files directly from a .zip file without extracting it. Tip: If you're packaging media files into a ZIP, you can use media playback calls on the files with offset and length controls (such as MediaPlayer.setDataSource() and SoundPool.load()) without the need to unpack your ZIP. In order for this to work, you must not perform additional compression on the media files when creating the ZIP packages. For example, when using the zip tool, you should use the -n option to specify the file suffixes that should not be compressed: zip -n .mp4;.ogg main_expansion media_files I've made an (uncompressed) zip package, but I cannot figure out how to get from a `ZipEntry` to a `FileDescriptor`, and they don't explain any further. How do I get a `FileDescriptor` without unpacking the zip file?

Original source

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