71 lines
2.7 KiB
Plaintext
71 lines
2.7 KiB
Plaintext
page.title=Google Cloud Messaging for Android
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page.tags=gcm
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header.hide=1
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@jd:body
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<div class="landing-banner">
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<div class="col-5" style="min-height:100px">
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<img src="{@docRoot}images/gcm/gcm-logo.png" />
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</div>
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<div class="col-7">
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<h1 itemprop="name" style="margin-bottom:0;">Google Cloud Messaging for Android</h1>
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<p itemprop="description">
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Google Cloud Messaging for Android (GCM) is a service that allows you to send data
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from your server to your users' Android-powered device, and also to receive messages from
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devices on the same connection. The GCM service handles all aspects of queueing of messages
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and delivery to the target Android application running on the target device. GCM is
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completely free no matter how big your messaging needs are, and there are no quotas.
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</p>
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</div>
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</div>
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<div class="landing-docs">
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<div class="col-6 normal-links">
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<h3 style="clear:left">Key Developer Features</h3>
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<h4>Send data from your server to users' Android-powered devices</h4>
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<p>This could be a lightweight
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message telling your app there is new data to be fetched from the
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server (for instance, a movie uploaded by a friend), or it could be a message containing
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up to 4kb of payload data (so apps like instant messaging can consume the message directly).
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<a href="{@docRoot}google/gcm/gcm.html">GCM Architectural Overview.</a></p>
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<h4>Send "send-to-sync" messages</h4>
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<p>A send-to-sync (collapsible) message is often a "tickle" that tells a mobile
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application to sync data from the server. For example, suppose you have an email
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application. When a user receives new email on the server, the server pings the mobile
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application with a "New mail" message. This tells the application to sync to the server
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to pick up the new email.
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<a href="{@docRoot}google/gcm/adv.html#s2s">Learn more »</a></p>
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<h4>Send messages with payload</h4>
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<p>Unlike a send-to-sync message, every "message with payload" (non-collapsible message)
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is delivered. The payload the message contains can be up to 4kb.
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<a href="{@docRoot}google/gcm/adv.html#payload">Learn more »</a></p>
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</div>
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<div class="col-6 normal-links">
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<h3 style="clear:left">New Features</h3>
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<h4>Return Receipts</h4>
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<p>You can use upstream messaging to get receipt notifications, confirming that a given
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message was sent to a device. Your 3rd-party app server receives the receipt notification
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from CCS once the message has been sent to the device.
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<a href="{@docRoot}google/gcm/ccs.html#receipts">Learn more »</a></p>
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<h4>Get Started</h4>
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<p>Get started with a tutorial that walks you through creating a GCM app.
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<a href="{@docRoot}google/gcm/gs.html">Learn more »</a></p>
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</div>
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</div>
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