I think the code you tried probably returns a dynamic ID. Try this.
private static final Uri URI = Uri.parse("content://com.google.android.gsf.gservices");
private static final String ID_KEY = "android_id";
String getAndroidId(Context ctx) {
String[] params = { ID_KEY };
Cursor c = ctx.getContentResolver()
.query(URI, null, null, params, null);
try{
if (!c.moveToFirst() || c.getColumnCount() < 2){
return null;
}
}catch(Exception e){
return null;
}
try {
Toast.makeText(ctx, Long.toHexString(Long.parseLong(c.getString(1))), 500).show();
System.out.println("android id " + Long.toHexString(Long.parseLong(c.getString(1))));
return Long.toHexString(Long.parseLong(c.getString(1)));
} catch (NumberFormatException e) {
return null;
}
}
In the above code Long.toHexString(Long.parseLong(c.getString(1))), returns the android device id.