Thread: importing java librarys

Originally Posted by bean

i am allso trying to use Package javax.sound.sampled which is a native part of java sdk since version 6 but am unable to do so why? thanks"

Strictly speaking Android isn't Java. It does use a partial subset of J2SE and if you check the Packages list you will find javax.sound isn't included. See Managing Audio for another option.

Have you read up on MediaPlayer and SoundPool. They are really excellent classes that will suite 99.9% of problems.

Originally Posted by bean

it does not seem possible to save it to a byte[]

I suppose if you *really* wanted to it would be possible but I can think of dozens of reasons why it would be a bad idea. One of the most painful and hard to sink in lessons I've come to learn with Android is that you shouldn't fight against it. Chances are there is a very good reason things are done the way they are.

Originally Posted by bean"

and in my case i would imagine it would create countless deadlock situations

Prove it..

rt.jar contains the Java runtime tools (there is no reason to mess around with this jar unless you are doing something funky like writing a bytecode interpreter). As I said before, Android isn't Java in the strictest sense. In fact it doesn't even use the JRE to execute java bytecode, it uses the Davlik VM to execute DEX files. It's an entirely different architecture and they are not compatible. The crash you are experiencing is un-resolvable.

Just a parting word of advice; use the Android toolset for Android problems where possible. The MediaPlayer may seem complex at first glance but it was designed for Android from the ground up and it's highly unlikely this AudioRecorder API is superior in any way. Chances are you will be fighting with dependencies, codecs, OutOfMemory exceptions and general instability before the day is out.

Whenever I encounter a problem that isn't handled by the Android toolset I do whatever I can to prevent entering into an escalation of complexity spiral. First I'll thoroughly explore the SDK incase I've missed something. Then I will post on StackOverflow with an MCE and list of things I've tried. If there legitimately isn't an solution I will make a feature request on the Android google group. Then I'll sit on it for a few days and have a chat with colleges and programmer friends in the hope an alternative solution occurs to me. As a last resort I'll bite the bullet and roll out my own solution.

You'll notice the one thing missing here is hacking in a solution from a different framework that I happen to know about.

My point is that just because reading a sound file as a byte[] worked in vanilla Java doesn't mean it will work on Android. Writing it to SD on an asynch task then reading the file as an input stream achieves the exact same thing without going down the rabbit hole.