Question

All I’m trying to do is compile the Arduino to Android ‘hello world’ program from the book “Beginning Android ADK with Arduino”.

Here is the code

#include <Max3421e.h>
#include <Usb.h>
#include <AndroidAccessory.h>

#define ARRAY_SIZE 12

AndroidAccessory acc("Manufacturer", "Model", "Description",
                     "Version", "URI", "Serial");

char hello[ARRAY_SIZE] = {'h','e','l','l','o',' ',
                          'w','o','r','l','d','!'};

void setup() {
  Serial.begin(115200);
  acc.powerOn();
}

void loop() {
  if (acc.isConnected()) {
    for(int x = 0; x < ARRAY_SIZE; x++) {
      Serial.print(hello[x]);
      delay(250);
    }
    Serial.println();
    delay(250);
  }
}

And my error

C:\Users\efossum\arduino-1.0.1\libraries\UsbHost/AndroidAccessory.h: In function 'void setup()':
C:\Users\efossum\arduino-1.0.1\libraries\UsbHost/AndroidAccessory.h:68: error: 'void AndroidAccessory::powerOn()' is private
sketch_aug23a:14: error: within this context

I looked in AndroidAccessory.h and sure enough it is private, but what should I change to make this work? I assume making the function pulic is not the answer.

Answer 1

I did it! I just made the visibility of the read() function in the <AndroidAccessory.h> header public and used begin() instead of powerOn() like Mickaël said, and now the code compiles successful.