Randy Tong

The xml image you posted is not enough for us to check.Please post the full xml.

For the second question:

2. How do i fix the emulator, it is not showing me the app, only the regular phone functions?

Wonder have you created an AVD ?

If you want online, try explore on 000webhost. It allows you to put PHP script inside and the database is MySQL.

1. Move setContentView to the line after super.onCreate(...)'
2. Make sure you have edittext and textview in activity_main

You get download WampServer or Xampp by free.

You can have mysql for your database. PHP will be the third party for that.

Before you start , have you successfully run a "Hello World " simple program ?

Try clear the image in ImageView before you set to another image

The value displayed in toast is in the correct condition ? Did the value you get is what you expected ?

..... and a Happy New Year Ranches

Add toast to check is the getTag value you get is execute in the correct condition?

post xml as well

Are there any tutorial available for developing p a mobile app with a ruby on rails back-end?

xin yi wrote:Hi, I don't know.. , I only know in Java or JavaScript the different is..

Hi, no problem

Hi Ranches, today is my first day to learn Ruby.

What are the differences between "  " and '  ' ?

Example
#!/usr/bin/ruby -w print <<EOF   This is the first way of creating   here document ie. multiple line string. EOF print <<"EOF";                # same as above   This is the second way of creating   here document ie. multiple line string. EOF print <<`EOC`                 # execute commands echo hi there echo lo there EOC print <<"foo", <<"bar"  # you can stack them I said foo. foo I said bar. bar
As I changed ' ' to " ", I still get the same output.

Refer link : https://www.tutorialspoint.com/ruby/ruby_syntax.htm

Java is an programming language, not IDE. IDE is a software for you to build software, ex Netbeans, Eclipse...