Android Training/Creating an Android Project/de: Unterschied zwischen den Versionen

This lesson shows how to create a new project either using Android Studio or using the SDK tools from a command line.

'''Note:''' You should already have the Android SDK installed, and if you're using Android Studio, you should also have [http://developer.android.com/sdk/installing/studio.html Android Studio] installed. If you don't have these, follow the guide to [http://developer.android.com/sdk/installing/index.html Installing the Android SDK] before you start this lesson.

== Create a Project with Android Studio ==

[[Datei:Adt-firstapp-setup.png|thumb|'''Figure 1.''' Configuring a new project in Android Studio.]]

# In Android Studio, create a new project:

#* If you don't have a project opened, in the '''Welcome''' screen, click '''New Project'''.

#* If you have a project opened, from the '''File''' menu, select '''New Project'''.

# Under '''Configure your new project''', fill in the fields as shown in figure 1 and click '''Next'''. It will probably be easier to follow these lessons if you use the same values as shown.

#*'''Application Name''' is the app name that appears to users. For this project, use "My First App."

#*'''Company domain''' provides a qualifier that will be appended to the package name; Android Studio will remember this qualifier for each new project you create.

#*'''Package name''' is the fully qualified name for the project (following the same rules as those for naming packages in the Java programming language). Your package name must be unique across all packages installed on the Android system. You can '''Edit''' this value independently from the application name or the company domain.

#Under '''Select the form factors your app will run on''', check the box for '''Phone and Tablet'''.

#For '''Minimum SDK''', select '''API 8: Android 2.2 (Froyo)'''.

#*The Minimum Required SDK is the earliest version of Android that your app supports, indicated using the [[API-Level|API level]]. To support as many devices as possible, you should set this to the lowest version available that allows your app to provide its core feature set. If any feature of your app is possible only on newer versions of Android and it's not critical to the app's core feature set, you can enable the feature only when running on the versions that support it (as discussed in [[Spezial:MyLanguage/Android Training/Supporting Different Platform Versions|Supporting Different Platform Versions]]).

#Leave all of the other options (TV, Wear, and Glass) unchecked and click '''Next.'''

#Under '''Add an activity to <''template''>''', select '''Blank Activity''' and click '''Next'''.

#Under '''Choose options for your new file''', change the '''Activity Name''' to ''MyActivity''. The '''Layout Name''' changes to ''activity_my'', and the '''Title''' to ''MyActivity''. The '''Menu Resource Name''' is''menu_my''.

#Click the '''Finish''' button to create the project.

Your Android project is now a basic "Hello World" app that contains some default files. Take a moment to review the most important of these:

* This is the XML layout file for the activity you added when you created the project with Android Studio. Following the New Project workflow, Android Studio presents this file with both a text view and a preview of the screen UI. The file includes some default settings and a <code>TextView</code> element that displays the message, "Hello world!"

* A tab for this file appears in Android Studio when the New Project workflow finishes. When you select the file you see the class definition for the activity you created. When you build and run the app, the <code>Activity</code> class starts the activity and loads the layout file that says "Hello World!"

* The [http://developer.android.com/guide/topics/manifest/manifest-intro.html manifest file] describes the fundamental characteristics of the app and defines each of its components. You'll revisit this file as you follow these lessons and add more components to your app.

:: <code>tools/android list targets</code>

:: This prints a list of the available Android platforms that you’ve downloaded for your SDK. Find the platform against which you want to compile your app. Make a note of the target ID. We recommend that you select the highest version possible. You can still build your app to support older versions, but setting the build target to the latest version allows you to optimize your app for the latest devices.  If you don't see any targets listed, you need to install some using the Android SDK Manager tool. See [http://developer.android.com/sdk/installing/adding-packages.html Adding SDK Packages].

:: <code>android create project --target <target-id> --name MyFirstApp \ --path <path-to-workspace>/MyFirstApp --activity MyActivity \ --package com.example.myfirstapp</code>

:: Replace <code><target-id></code> with an ID from the list of targets (from the previous step) and replace <code><path-to-workspace></code> with the location in which you want to save your Android projects.