試圖將數據庫導出到SDCARD

Question

我很新的android和我試圖導出我的數據庫到SD卡，所以我可以將其導入到我的其他應用程序。

有什麼建議嗎？

Thanx提前。

Answer 1

儘管這可能不是您嘗試執行的最佳解決方案，但您的數據庫已存儲在/data/data/your.package.name中。您只需將其作爲文件加載並保存到SD卡即可。檢查這裏的，這是否代碼：

http://www.screaming-penguin.com/node/7749

Answer 2

出口例如：

public void exportDB(){ 
    try { 
     File sd = Environment.getExternalStorageDirectory(); 
     if (sd.canWrite()) { 
      String currentDBPath = "data/data/com.mypack.myapp/databases/mydb.db"; 
      String backupDBPath = sd + "/filename.db"; 
      File currentDB = new File(currentDBPath); 
      File backupDB = new File(backupDBPath); 

      if (currentDB.exists()) { 
       FileChannel src = new FileInputStream(currentDB).getChannel(); 
       FileChannel dst = new FileOutputStream(backupDB).getChannel(); 
       dst.transferFrom(src, 0, src.size()); 
       src.close(); 
       dst.close(); 
       } 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
} 

導入是非常相似的出口：

public void importDB(){ 
    try { 
     File sd = Environment.getExternalStorageDirectory(); 
     if (sd.canWrite()) { 
      String currentDBPath = sd + "/filename.db"; 
      String backupDBPath = "data/data/com.mypack.myapp/databases/mydb_2.db"; 
      File currentDB = new File(currentDBPath); 
      File backupDB = new File(backupDBPath); 

      if (currentDB.exists()) { 
       FileChannel src = new FileInputStream(currentDB).getChannel(); 
       FileChannel dst = new FileOutputStream(backupDB).getChannel(); 
       dst.transferFrom(src, 0, src.size()); 
       src.close(); 
       dst.close(); 
       } 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
}