相关疑难解决方法(0)

我正在尝试通过USB发送和接收数据,我的设备,Acer Iconia A500具有连接到设备所需的一切和​​一切,这很好并且工作正常,但是当我尝试发送和接收数据时,它不会表现为预期.这是我的代码

for( ; ; ) { //this is the main loop for transferring   
    String get = "$getPos";
    byte[] getBytes = get.getBytes();
    conn.bulkTransfer( epOUT, getBytes, getBytes.length, 500 );

    try {
        Thread.sleep( 500 );
        byte[] buffer = new byte[4096];
        conn.bulkTransfer( epIN, buffer, 4096, 500 );
        StringBuilder byStr = new StringBuilder();

        for( int i = 0; i < buffer.length; i++ ) {
            if( buffer[i] != 0 ) {
                byStr.append( buffer[i] + ", " );
            }
        }

        l( byStr );
    }
    catch( …