First of all we need to make sure that we have Java installed. If we want to develop with java we need the Java Development Kit (JDK) version. It can be downloaded from HERE.
Next we need to get our Integrated Developing Environment (IDE) – Eclipse, where we do all the coding. Eclipse Classic can be downloaded from HERE.
Finally we can download the Android Software Development Kit (SDK) from HERE. Please read the guide carefully for how to successfully set up the Basic environment. A good way of checking that it all works is to get the Android Virtual Device (AVD) up and running. This is basically a emulator for Android devices.