Primer Programa, instalación SDK, Eclipse plugin
Hello I am edu from edu4java and this is the first Android tutorial.
We are going to make our first Android program
The first thing we are going to do is download Android SDK
Here we are.
Ok, lets go to Quick Start and it says;
Prepare your development computer
Ok, basically here is says that you must have already installed Eclipse and Java JDK.
I recommend you Eclipse 3.5 and JDK 1.6
If you don't know how to install them, there is a tutorial in edu4java;
The first tutorial which shows you how to install Eclipse and JDK
Let's go to point 2.
Download and install the SDK starter package
It is about this links that we have here.
I'm going to choose Windows
Basically because I have Windows
Here I cheated on you, I had already downloaded it
Then I'm going to use this one
Once you have downloaded it you double click
And you are going to see a little folder inside
You drag it
You better drop it in a folder like C:\
Or C:\android for example
I put it in the desktop to make this tutorial more simple
Once we have download the folder android-sdk-windows we are going
To execute SDK Manager.exe
This runs this
Here we are recommended to download all this
You can do it but to be quicker I'm going to cancel it
Lets take a look, this is a manager which let us download different ...
Let's see what we've got available packages
We are going to download this SDK and the API
There are a lot of SDK versions, 8,
Android 2.2 ,API 8, Android 2.1 the API 7,
I'm going to download this one which is the last version of sdk
And this one which is the last version of the examples.
Once we have them... Install Selected
Accept and Install
And now wait
Thanks to the magic of the TV the waiting is shorter
Everything is downloaded.
ok, let's leave it here.
Let's continue with eclipse.
Follow the instructions to do it right
Install the ADT plug-in for Eclipse
Copy this URL
Go to Eclipse
- help –
Install new software
Add a new site from where to download plug-ins
And the plug-in is installing
Here we get a warning
Click ok, is not important
Finish... your are asked to restart click
Ok, we have the eclipse plug-in installed
Now we need to inform the eclipse plug-in for Android where is the Android SDK
Go to windows – preferences – Android.
I have this already from before but you have to go to browse and
Select the SDK location where you put it, for example I put it in
Desktop Android here
And you are going to put this folder...
Ok and automatically this is going to appear
That is the sdk version you have.
Ok, the android plug-in has already been installed and configured.
Right button on the mouse,
Other... you are going to have a tab android where you have an android project
Like this we can create an android project... Ok
We are going to put a name
Android tutorial 1
We are going to put application name
Android tutorial 1
We are going to put a package name
We are going to put an activity
Ok, an activity it is not exactly a window but we can consider it as one
For the sdk version we are going to use 7,
We are going to use 8, but we are going to say we'll use 7.
It is a bit risky but anyway
Now we have new project
As you can see it generated a lot of files and directories
Let's go over it;
The main element is the android manifest xml
This is the main element inside the android program
This manifest has a tag application
And inside the application it has generated automatically an activity
Which would be the window
This .ventana is making reference to a class which was also generated: ventana.java
This point here is because the default package is this one
To avoid writing this, this way
Android allows us to write it .ventana
We are talking about this class which is inside this package
Ok, afterwards we are going to see what an intent is...
This a window
Let's see if we can run this application and see the window
This is all generated code
Let's see the window
The activity has a label which is going to be string/app name
This app name is taken out of a string which in the folder resource,
Values has a xml strings
This would be as
What is here is going to be taken from here
It will show android tutorial 1
Hello World, ventana! es el hello
Which is going to be used in the layout
The layout is this one
It access to Hello World, ventana!
Let's run the program and continue talking later
Press right button of the mouse
Run as- android application
As we have told the plug-in where the sdk is
He is going to run the sdk
We are going to run the emulator
The emulator of an android telephone
This emulator automatically
When we are compiling we run the emulator and all the code of the project is going to be compiled and copied inside the telephone
And when this is finish loading our application will be showed.
It takes its time
I don't know why but it is shown in this type of screen
Normally we press menu to show the application
Android tutorial 1 Hello World, ventana!
Let´s go to the string and change Hello World, ventana! for Hello World, Edu!
We save and we go back to run as android application
And load the emulator
And we can see that the application now says Hello Edu! in the android
Ok, with this we finish the first android tutorial and now we are going to carry on making android tutorials
See you in the next one