72 lines
3.5 KiB
Plaintext
72 lines
3.5 KiB
Plaintext
page.title=Creating Wearable Apps
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@jd:body
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<div id="tb-wrapper">
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<div id="tb">
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<h2>Dependencies and Prerequisites</h2>
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<ul>
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<li>Android Studio 0.8 or later and Gradle 1.12 or later</li>
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</ul>
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</div>
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</div>
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<p>
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Wearable apps run directly on the device, giving you access to hardware such as sensors and the
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GPU. They are fundamentally the same as apps built for other devices using the Android SDK, but
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differ greatly in design and usability and the amount of functionality provided.
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These are the main differences between handheld and wearable apps:</p>
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<ul>
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<li>The system enforces a timeout period. If you are displaying an activity and user's don't
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interact with it, the device sleeps. When it wakes back up, the Wear home screen is displayed
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instead of your activity. If you need to show something persistent, create a notification in the
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context stream instead.</li>
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<li>Wearable apps are relatively small in size and functionality compared to handheld apps.
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They contain only what makes sense on the wearable, which is usually a small
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subset of the corresponding handheld app. In general, you should carry out operations on the
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handheld when possible and send the results to the wearable.
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</li>
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<li>Users don't download apps directly onto the wearable. Instead, you bundle
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the wearable app inside the handheld app. When users install the handheld app,
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the system automatically installs the wearable app. However, for development
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purposes, you can still install the wearable app directly to the wearable.</li>
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<li><p>Wearable apps can access much of the standard Android APIs, but don't support
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the following APIs:</p>
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<ul>
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<li>{@link android.webkit}</li>
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<li>{@link android.print}</li>
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<li>{@link android.app.backup}</li>
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<li>{@link android.appwidget}</li>
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<li>{@link android.hardware.usb}</li>
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</ul>
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<p>
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You can check if a wearable supports a feature by calling
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{@link android.content.pm.PackageManager#hasSystemFeature hasSystemFeature()}
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before trying to use an API.</p>
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</li>
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</ul>
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<p class="note"><b>Note:</b> We recommend using Android Studio for Android Wear development
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as it provides project setup, library inclusion, and packaging conveniences that aren't available
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in ADT. The rest of this training assumes you're using Android Studio.
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</p>
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<h2>Lessons</h2>
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<dl>
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<dt><a href="{@docRoot}training/wearables/apps/creating.html">Creating and Running a Wearable App</a></dt>
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<dd>Learn how to create an Android Studio project that
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contains both the wearable and handheld app modules and how to run the app on a device
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or emulator.</dd>
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<dt><a href="{@docRoot}training/wearables/apps/activity.html">Creating Custom Layouts</a></dt>
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<dd>Learn how to create and display custom layouts for notifications and
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activities.</dd>
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<dt><a href="{@docRoot}training/wearables/apps/voice.html">Adding Voice Capabilities</a></dt>
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<dd>Learn how to launch an activity with a voice actions and how to start the
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system speech recognizer app to obtain free-form voice input.</dd>
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<dt><a href="{@docRoot}training/wearables/apps/packaging.html">Packaging Wearable Apps</a></dt>
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<dd>Learn how to package a wearable app inside a
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handheld app. This allows the system to install the wearable app automatically when
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users install the companion handheld app from the Google Play store.</dd>
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<dt><a href="{@docRoot}training/wearables/apps/packaging.html">Debugging over Bluetooth</a></dt>
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<dd>Learn how to debug your wearable over Bluetooth instead of USB.</dd>
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</dl> |