1 <HTML> 2 <BODY> 3 <p>Provides classes for managing DRM content and determining the capabilities of DRM plugins 4 (agents). Common uses of the DRM API include:</p> 5 <ul> 6 <li>Determining which DRM plug-ins (agents) are installed on a device.</li> 7 <li>Retrieving information about specific plug-ins, such as the MIME types and file suffixes 8 they support.</li> 9 <li>Registering a user or a device with an online DRM service.</li> 10 <li>Retrieving license constraints for rights-protected content.</li> 11 <li>Checking whether a user has the proper rights to play or use rights-protected 12 content.</li> 13 <li>Associating rights-protected content with its license so you can use the 14 {@link android.media.MediaPlayer} API to play the content.</li> 15 </ul> 16 17 <h2>DRM Overview</h2> 18 19 <p>The Android platform provides an extensible DRM framework that lets applications manage 20 rights-protected content according to the license constraints that are associated with the 21 content. The DRM framework supports many DRM schemes; which DRM schemes a device supports 22 is up to the device manufacturer.</p> 23 24 <p>The Android DRM framework is implemented in two architectural layers (see figure below):</p> 25 <ul> 26 <li>A DRM framework API, which is exposed to applications through the Android 27 application framework and runs through the Dalvik VM for standard applications.</li> 28 <li>A native code DRM manager, which implements the DRM framework and exposes an 29 interface for DRM plug-ins (agents) to handle rights management and decryption for various 30 DRM schemes.</li> 31 </ul> 32 33 <img src="../../../images/drm_arch.png" alt="DRM architecture diagram" border="0"/> 34 35 <p>For application developers, the DRM framework offers an abstract, unified API that 36 simplifies the management of rights-protected content. The API hides the complexity of DRM 37 operations and allows a consistent operation mode for both rights-protected and unprotected content 38 across a variety of DRM schemes. For device manufacturers, content owners, and Internet digital 39 media providers the DRM frameworks plugin architecture provides a means of adding support for a 40 specific DRM scheme to the Android system.</p> 41 42 <h2>Using the DRM API</h2> 43 44 <p>In a typical DRM session, an Android application uses the DRM framework API to 45 instantiate a {@link android.drm.DrmManagerClient}. The application calls various methods 46 on the DRM client to query rights and perform other DRM-related tasks. Each 47 {@link android.drm.DrmManagerClient} instance has its own unique ID, so the DRM manager is able to 48 differentiate callers.</p> 49 50 <p>Although each DRM plug-in may require a different sequence 51 of API calls, the general call sequence for an application is as follows:</p> 52 53 <ul> 54 <li>Register the device with an online DRM service. 55 <p>You can do this by first using the {@link android.drm.DrmManagerClient#acquireDrmInfo 56 acquireDrmInfo()} method to acquire the registration information, and then using the {@link 57 android.drm.DrmManagerClient#processDrmInfo processDrmInfo()} method to process the 58 registration information.</p> 59 </li> 60 <li>Acquire the license that's associated with the rights-protected content. 61 <p>You can do this by first using the {@link android.drm.DrmManagerClient#acquireDrmInfo 62 acquireDrmInfo()} method to acquire the license information, and then using the {@link 63 android.drm.DrmManagerClient#processDrmInfo processDrmInfo()} method to process the 64 license information. You can also use the {@link 65 android.drm.DrmManagerClient#acquireRights acquireRights()} method.</p> 66 </li> 67 <li>Extract constraint information from the license. 68 <p>You can use the {@link android.drm.DrmManagerClient#getConstraints getConstraints()} 69 method to do this.</p> 70 </li> 71 <li>Associate the rights-protected content with its license. 72 <p>You can use the {@link android.drm.DrmManagerClient#saveRights saveRights()} method 73 to do this.</p> 74 </li> 75 </ul> 76 77 <p>After you make an association between the rights-protected content and its license, 78 the DRM manager automatically handles rights management for that content. Specifically, the 79 DRM manager will handle all further licensing checks when you attempt to play the content using 80 the {@link android.media.MediaPlayer} API.</p> 81 82 <p>To learn how to use the DRM API with a specific DRM plug-in, see the documentation provided 83 by the plug-in developer.</p> 84 </BODY> 85 </HTML> 86
