[header] How to start building an android application [title] Install the java development kit. [step] Jdk or the java development kit is the first step to android app development. The recent jre (or the java runtime development) must be downloaded as the older versions might cause serious technical issues with the latest jdk that the developer would want to use for his app. 
Install the jdk and keep in mind that " development tools ", " source code " and " public jre " occur in the custom install window. Click " next ", read the licence agreement and there you go.