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POunable to call onBackup() method of BackupAgentHelper
 

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  1. POunable to call onBackup() method of BackupAgentHelper
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    <p>I am having class which takes backup of data and restore the same. I have referred the example given in api demos. But it does not work at all.</p> <p>Can anybody help me over this issue?</p> <p>Android Manifest.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.kpbird.backupdemo" android:versionCode="1" android:versionName="1.0"&gt; &lt;application android:icon="@drawable/icon" android:label="@string/app_name" android:backupAgent="MyBackupAgent" android:restoreAnyVersion="true" android:allowBackup="true" android:enabled="true"&gt; &lt;activity android:name=".BackupServiceDemo" android:label="@string/app_name"&gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;meta-data android:name="com.google.android.backup.api_key" android:value="AEdPqrEAAAAIAjALiYV5vv5cRGD5L649XByQMnFFYfApskNIfg" /&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>MyActivity.class</p> <pre><code>public class BackupRestoreActivity extends Activity implements OnClickListener { BackupManager mBackupManager; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mBackupManager = new BackupManager(this); mBackupManager.dataChanged(); } } </code></pre> <p>MyBackupAgent.class</p> <pre><code>public class MyBackupAgent extends BackupAgentHelper { static final String MY_PREFS_BACKUP_KEY = "AEdPqrEAAAAIAjALiYV5vv5cRGD5L649XByQMnFFYfApskNIfg"; static final String APP_DATA_KEY = "mydata"; String TAG = this.getClass().getSimpleName(); @Override public void onCreate() { Log.i("MyBackupAgent &gt;&gt;&gt;&gt;&gt;&gt; ","into Oncreate() of my Backup Agent &gt;&gt;&gt;&gt;"); } @Override public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data,ParcelFileDescriptor newState) throws IOException { Log.i(TAG, "I m onBackup"); ByteArrayOutputStream bufStream = new ByteArrayOutputStream(); DataOutputStream outWriter = new DataOutputStream(bufStream); outWriter.writeUTF("Hello Backup Service!"); byte[] buffer = bufStream.toByteArray(); int len = buffer.length; data.writeEntityHeader(APP_DATA_KEY, len); data.writeEntityData(buffer, len); FileOutputStream outstream = new FileOutputStream(newState.getFileDescriptor()); DataOutputStream out = new DataOutputStream(outstream); out.writeUTF("Hello Backup Service!"); Log.i(TAG, "Backup Message Completed"); } @Override public void onRestore(BackupDataInput data, int appVersionCode,ParcelFileDescriptor newState) throws IOException { Log.i(TAG, "I m onRestore"); while (data.readNextHeader()) { String key = data.getKey(); int dataSize = data.getDataSize(); if(key.equals(APP_DATA_KEY)){ byte[] dataBuf = new byte[dataSize]; data.readEntityData(dataBuf, 0, dataSize); ByteArrayInputStream baStream = new ByteArrayInputStream(dataBuf); DataInputStream in = new DataInputStream(baStream); String read = in.readUTF(); Log.i(TAG, "Restored Message :" + read); } else{ data.skipEntityData(); } } } } </code></pre>
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    1. COYou should include your AndroidManifest.xml file and the code of your BackupAgentHelper.
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    2. COPlease refer the code and help me out .....Thank you
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