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copied!<p>I don't see why you run into this problem.</p> <p>I have the same issue: I want to support backup with a app that supports also 1.5 (API 3).</p> <p>There is no problem in creating my <code>BackupAgentHelper</code> class, since that class is never called from my own code, but from the <code>BackupManager</code> i.e. the system itself. Therefore I don't need to wrap it, and I don't see why you should be doing that:</p> <pre><code> public class MyBackupAgentHelper extends BackupAgentHelper { @override onCreate() { \\do something usefull } </code></pre> <p>However, you do want to get a backup running, to do that you need to call on <code>BackupManager.dataChanged()</code> whenever your data changes and you want to inform the system to backup it (using your <code>BackupAgent</code> or <code>BackupAgentHelper</code>).</p> <p>You do need to wrap that class, since you call it from you application code.</p> <pre><code> public class WrapBackupManager { private BackupManager wrappedInstance; static { try { Class.forName("android.app.backup.BackupManager"); } catch (Exception e) { throw new RuntimeException(e); } } public static void checkAvailable() {} public void dataChanged() { wrappedInstance.dataChanged(); } public WrapBackupManager(Context context) { wrappedInstance = new BackupManager(context); } } </code></pre> <p>You then call it from your code when you change a preference or save some data. Some code from my app:</p> <pre><code> private static Boolean backupManagerAvailable = null; private static void postCommitAction() { if (backupManagerAvailable == null) { try { WrapBackupManager.checkAvailable(); backupManagerAvailable = true; } catch (Throwable t) { backupManagerAvailable = false; } } if (backupManagerAvailable == true) { Log.d("Fretter", "Backup Manager available, using it now."); WrapBackupManager wrapBackupManager = new WrapBackupManager( FretterApplication.getApplication()); wrapBackupManager.dataChanged(); } else { Log.d("Fretter", "Backup Manager not available, not using it now."); } </code></pre> <p>So, hopefully this works for you! </p> <p>(If you call <code>adb shell bmgr run</code> every time you want to emulate the actual system initiated backupprocess it should properly backup and restore when you reinstall the app.)</p>

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