xref: /frameworks/base/docs/html/tools/building/building-studio.jd

page.title=Building and Running from Android Studio
parent.title=Building and Running
parent.link=index.html
@jd:body

<div id="qv-wrapper">
  <div id="qv">
    <h2>In this document</h2>
  <ol>
    <li><a href="#buildProject">Building your Project in Android Studio</a>
      <ol>
        <li><a href="#buildRelease">Build a release version</a> </li>
      </ol>
    </li>
    <li><a href=id="RunningApp">Running your App</a>
      <ol>
        <li><a href="#RunConfig">Creating a Run Configuration</a></li>
        <li><a href="#AutoAndManualTargetModes">Automatic and manual target modes</a></li>
        <li><a href="#RunningOnEmulatorStudio">Running on an Emulator</a></li>
        <li><a href="#RunningOnDeviceStudio">Running on a Device</a></li>
      </ol>
    </li>
  </ol>

  <h2>See also</h2>
  <ol>
    <li><a href="{@docRoot}sdk/installing/studio-build.html">
      Build System</a></li>
    <li><a href="{@docRoot}tools/devices/managing-avds.html">
      Managing AVDs with AVD Manager</a></li>
    <li><a href="{@docRoot}tools/devices/emulator.html">
      Using the Android Emulator</a></li>
    <li><a href="{@docRoot}tools/publishing/app-signing.html">
      Signing Your Applications</a></li>
  </ol>

  </div>
</div>


<p>This document shows you how to use Android Studio to build an application <code>.apk</code> for
testing or release and how to run your application on an emulator or a real device.</p>


<h2 id="buildProject">Build your Project in Android Studio</h2>

<p>To build the project on Android Studio, click <strong>Build</strong> and select
<strong>Make Project</strong>. The status bar at the bottom of the window shows the current
progress of the build:</p>

<p><code>Gradle: Executing tasks: [:app:assembleDebug, :lib:bundleDebug]</code></p>

<p>Click <img src="{@docRoot}images/tools/as-gradlebutton.png" alt=""
style="vertical-align:bottom;margin:0;"/> on the bottom
right part of the window to show the <em>Gradle Console</em>, as shown in figure 1.</p>

<img src="{@docRoot}images/tools/studio-gradle-console.png" alt="" />
<p class="img-caption"><strong>Figure 1.</strong> The Gradle Console in Android Studio.</p>

<p>The Gradle Console shows the build tasks and subtasks that the build system runs for
Android Studio. If the build fails, you can find more details on the console. To hide the Gradle
Console, click <img src="{@docRoot}images/tools/as-gradlebutton.png" alt=""
style="vertical-align:bottom;margin:0;"/> again.</p>

<p class="note">If your project uses product flavors, Android Studio invokes the task for the
selected build variant. For more information, see the
<a href="{@docRoot}sdk/installing/studio-build.html">Build System</a> guide.</p>

<p>To view the list of all available build tasks in Android Studio, click <strong>Gradle</strong>
on the right side of the IDE window. The <em>Gradle tasks</em> panel appears.</p>


<h3 id="buildRelease">Build a release version</h3>

<p>You can now use the <strong>Build</strong> menu options to build the release version of your
application for distribution. </p>

<p>The build generates an APK for each build variant:
the <code>app/build/apk/</code> directory contains packages named
<code>app-&lt;flavor>-&lt;buildtype>.apk</code>; for example, <code>app-full-release.apk</code> and
<code>app-demo-debug.apk</code>.</p>


<p>For more build system information, see
<a href="{@docRoot}sdk/installing/studio-build.html">Build System</a>.</p>


  <h2 id="RunningApp">Running your app</h2>

  <p>This section shows you how to run your application on an emulator or a real device
   from Android Studio&mdash;all of which is done using the debug version of your application.
   For more information about how to sign your application with a private key for release, see
   <a href="{@docRoot}tools/publishing/app-signing.html">Signing Your Applications</a></p>


  <h3 id="RunConfig">Creating a Run Configuration</h3>

  <p>The run configuration specifies the module to run, package to deploy, Activity to start,
  target device, emulator settings, and Logcat options. Run configuration can be set at the project,
  default, and module levels. When you first run a module as an <em>Android Application</em>,
  Android Studio will automatically create a run configuration. The default run
  configuration will launch the default project Activity and use automatic target mode for device
  selection (with no preferred AVD). If the default settings don't suit your project or module, you
  can customize the run configuration or even create a new one.</p>

  <p>To create or modify a run configuration, see the IntelliJ documentation on
  <a href="https://www.jetbrains.com/idea/webhelp/run-debug-configuration-android-application.html">
  Run/Debug configurations</a>.</p>

  <p>The following steps highlight the important things you need to do for an Android project:</p>

  <ol>
    <li>Open <strong>Edit</strong> Configurations from the <strong>Run</strong> Menu.</li>

    <li>Expand the <strong>Android Application</strong> item and create a new configuration or open
    an existing one.</li>

    <li>With the Run Configuration selected, adjust your desired run configuration settings:
      <ul>
      <li>In the General tab, specify the Module settings to launch. In Target tab, consider whether
      you'd like to use Manual or Automatic mode when selecting an AVD to run your application. See
      the following section on <a href="#AutoAndManualTargetModes">Automatic and manual target modes</a>).
      </li>
      <li>In the Emulator tab, specify any emulator options to the Additional Emulator Command Line
      Options field. For example, you could add <code>-scale 96dpi</code> to scale the AVD's screen
      to an accurate size, based on the dpi of your computer monitor. For a full list of emulator
      options, see the <a href="{@docRoot}tools/help/emulator.html">Android
      Emulator</a> document.</p>
      </li>
      <li>In the Logcat tab, set the LogCat options for the application.  </li>
      </ul>
    </li>
  </ol>


  <h3 id="AutoAndManualTargetModes">Automatic and manual target modes</h3>

  <p>By default, a run configuration uses the <strong>automatic</strong> target mode in order to
  select an AVD. In this mode, Android Studio will select an AVD for the application in the following
  manner:</p>

  <ol>
    <li>If there's a device or emulator already running and its AVD configuration meets the
    requirements of the application's build target, the application is installed and run upon
    it.</li>

    <li>If there's more than one device or emulator running, each of which meets the requirements
    of the build target, a device chooser is shown to let you select which device to use.</li>

    <li>If there are no devices or emulators running that meet the requirements of the build
    target, Android Studio looks at the available AVDs. If there is an AVD that matches the build
    target of the project, Android Studio chooses that AVD. If the AVD versions are newer than the
    build target of the project, Android Studio chooses the oldest possible version of an AVD that
    meets the project or module build target requirement.</li>

    <li>If there are no suitable AVDs, the application is not installed and a console error warning
    tells you that there is no existing AVD that meets the build target requirements.</li>
  </ol>

  <p>However, if a "preferred" AVD is selected in the run configuration, then the application will
  <em>always</em> be deployed to that AVD. If it's not already running, then a new emulator will be
  launched.</p>

  <p>If your run configuration uses <strong>manual</strong> mode, then the "device chooser" is
  presented every time that your application is run, so that you can select which AVD to use.</p>



  <h3 id="RunningOnEmulatorStudio">Running on the emulator</h3>

  <p>Before you can run your application on the Android Emulator, you verify the default AVD or
 <a href="{@docRoot}tools/devices/managing-avds.html">create an AVD</a>.</p>

  <p>To run (or debug) your application, select <strong>Run</strong> &gt; <strong>Run</strong> (or
  <strong>Run</strong> &gt; <strong>debug</strong>) from the Android Studio menu bar. Android Studio
  automatically creates a default run configuration for the project. Android Studio will then perform
  the following:</p>

  <ol>
    <li>Compile the project (if there have been changes since the last build).</li>

    <li>Create a default run configuration (if one does not already exist for the project).</li>

    <li>Install and start the application on an emulator (or device), based on the Deployment
    Target defined by the run configuration.

      <p>By default, Android run configurations use an "automatic target" mode for selecting a
      device target. For information on how automatic target mode selects a deployment target, see
      <a href="#AutoAndManualTargetModes">Automatic and manual target modes</a> above.</p>
    </li>
  </ol>

  <p>If you run the application with <strong>Debug</strong>, the <em>Choose a Device</em> option
  appears so you can select an attached device or emulator. Once the device or emulator is selected,
  Android Studio opens the Debug console and starts the application's main activity. Otherwise, if
  you run the application with the normal Run command, Android Studio installs the application on the
  device and launches the main activity.</p>

  <p>To set or change the run configuration used for your project or module, select
  <strong>Run</strong> &gt; <strong>Edit Configurations</strong>. See the section below about
  <a href="#RunConfig">Creating a Run Configuration</a> for more information.</p>

  <p>Be certain to create multiple AVDs upon which to test your application. You should have one
  AVD for each platform and screen type with which your application is compatible. For instance, if
  your application compiles against the Android 4.0 (API Level 14) platform, you should create an
  AVD for each platform equal to and greater than 4.0 and an AVD for each <a href=
  "{@docRoot}guide/practices/screens_support.html">screen type</a> you support, then test your
  application on each one.</p>

  <h3 id="RunningOnDeviceStudio">Running on a device</h3>

  <p>Before you can run your application on a device, you must perform some basic setup for your
  device:</p>

  <ul>
    <li>Ensure that your application is debuggable by setting the
    <code>android:debuggable</code> attribute of the <code>&lt;application&gt;</code>
    element to <code>true</code> in the build.gradle file. </li>

    <li>Enable <strong>USB debugging</strong> on your device.
      <ul>
        <li>On most devices running Android 3.2 or older, you can find the option under
          <strong>Settings > Applications > Development</strong>.</li>
        <li>On Android 4.0 and newer, it's in <strong>Settings > Developer options</strong>.
          <p class="note"><strong>Note:</strong> On Android 4.2 and newer, <strong>Developer
          options</strong> is hidden by default. To make it available, go
          to <strong>Settings > About phone</strong> and tap <strong>Build number</strong>
          seven times. Return to the previous screen to find <strong>Developer options</strong>.</p>
        </li>
      </ul>
    </li>

    <li>Ensure that your development computer can detect your device when connected via USB</li>
  </ul>

  <p>Read <a href="{@docRoot}tools/device.html">Using Hardware Devices</a>
  for more information.</p>

  <p>Once set up and your device is connected via USB, install your application on the device by
  selecting <strong>Run</strong> &gt; <strong>Run</strong> (or <strong>Run</strong> &gt;
  <strong>Debug</strong>) from the Android Studio menu bar.</p>