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so the first thing you need to download in order to start developing for android, are the android SDK tools. 

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so we go to developer.android.com/SDK

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that will let you download the android SDK manager

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and you wanna choose the one obviously for your operating system. now since i'm on mac here

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i'm gonna choose this zip file, and i'm gonna download it, it's about 27.5 MB

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and this includes a set of tools that you're gonna use throughout your time developing for android

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and most importantly it includes the sdk manager, which is a tool that allows you to 

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download and install different components that make up the android system

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so if i double click to go to in this folder, we can see we have a tools folder here

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and inside of here we have an application called aneroid, which is the actual SDK manager

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so we're gonna navigate there, using a terminal window, so i'll go to spotlight and open up terminal

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and this puts me into my user directory, so i'm gonna go into downloads

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android-sdk-mac_x86 and then into the tools folder.

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now in order to lunch this on mac, i'm gonna do : ./android

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and now, this is gonna lunch up the android SDK manager

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now this is also where we're gonna be able to create emulators

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and setup various settings about our android development environment.

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AndroidApp.blog.ir