The full example is available in this SVN repo. The ManageData class invokes the export.

http://totsp.com/svn/repo/AndroidExamples/trunk/

您将需要创建一个公开的数据库，并在AndroidManifest.xml文件的应用程序名称引用的应用程序类。然后使用该数据库作为参数传递给 DataXmlExporter 的构造。

You will need to create an application class that exposes the DB and referenced as the application name in the AndroidManifest.xml file. Then use that DB as the argument to the DataXmlExporter constructor.

下面是我使用的应用程序类。你应该已经有一个类（可能没有名为 DatabaseHelper ），扩展 SQLiteOpenHelper

Here's the application class I use. You should already have a class (probably not named DatabaseHelper) that extends SQLiteOpenHelper

package com.billybobbain.android.someapp;
import android.app.Application;
import android.util.Log;

public class MyApplication extends Application {

   public static final String APP_NAME = "SomeApp";  

   private DatabaseHelper dataHelper;   

   @Override
   public void onCreate() {
      super.onCreate();
      Log.d(APP_NAME, "APPLICATION onCreate");
      this.dataHelper = new DatabaseHelper(this);      
   }

   @Override
   public void onTerminate() {
      Log.d(APP_NAME, "APPLICATION onTerminate");      
      super.onTerminate();      
   }

   public DatabaseHelper getDataHelper() {
      return this.dataHelper;
   }

   public void setDataHelper(DatabaseHelper dataHelper) {
      this.dataHelper = dataHelper;
   }
}