content: /*
   * Copyright  2017 [AllenCoder]
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.allen.dbutils;
  
  import android.content.Context;
  import android.util.Log;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  /**
   * Created by Allen on 2017/3/21.
   */
  
  public class Utils {
  
      /** 读文件buffer.*/
      private static final int FILE_BUFFER = 1024;
      private static String TAG="DbUtils";
  
      /**
       * 数据库导出到sdcard.
       * @param context
       * @param dbName 数据库名字 例如 xx.db
       */
      public static void exportDb2Sdcard(Context context,String dbName) {
          String filePath = context.getDatabasePath(dbName).getAbsolutePath();
          byte[] buffer = new byte[FILE_BUFFER];
          int length;
          OutputStream output;
          InputStream input;
          try {
              input = new FileInputStream(new File((filePath)));
              output = new FileOutputStream(context.getExternalCacheDir() + File.separator + dbName);
              while ((length = input.read(buffer)) > 0) {
                  output.write(buffer, 0, length);
              }
              output.flush();
              output.close();
              input.close();
              Log.i(TAG, "mv success!");
          } catch (IOException e) {
              Log.e(TAG, e.toString());
          }
      }
  }
  