Accessing the Android media stream for audio visualization

Question

Basically, I want to make an audio visualizer. I know it\'s possible, because my phone came with a few live wallpapers that do it. The problem is, I can\'t seem to figure

Answer 1

A slightly faster snoop() would be to call Class.getMethod() once, and then to use a custom parseInt() instead of Integer.parseInt()...

private static Method mSnoop;

//..(http://nadeausoftware.com/node/97)..
private static int customParseInt( final String s )
{
    // Check for a sign.
    int num  = 0;
    int sign = -1;
    final int len  = s.length( );
    final char ch  = s.charAt( 0 );
    if ( ch == '-' )
        sign = 1;
    else
        num = '0' - ch;

    // Build the number.
    int i = 1;
    while ( i < len )
        num = num*10 + '0' - s.charAt( i++ );

    return sign * num;
} 

private static int snoop(short [] outData, int kind)
{    
    if ( mSnoop != null )
    {
        try
        {
            return customParseInt( (mSnoop.invoke( MediaPlayer.class , outData, kind)).toString() );
        }
        catch ( Exception e )
        {
            Log.e( TAG, "Failed to MediaPlayer.snoop()!", e );
            return 1;
        }
    }
    else
    {
        try {
            Class c = MediaPlayer.class;
            Method m = c.getMethod("snoop", outData.getClass(), Integer.TYPE);
            m.setAccessible(true);
            mSnoop = m;
            return customParseInt( (m.invoke(c, outData, kind)).toString() ); 
        } 
        catch (Exception e) 
        {
            Log.e( TAG, "Failed to MediaPlayer.snoop()!", e );
            return 1;
        }
    }
}