Blackberry - 如何使用输入/输出流将文件复制到SD卡？

Question

我正尝试使用输入/输出流将我的Blackberry资产文件夹复制到SD卡。但我似乎无法得到这个工作。运行指示error: cannot find symbol inConn.close(); & outConn.close();的Blackberry模拟器时，我收到一条错误消息。有人能告诉我做错了什么吗？

import com.phonegap.api.Plugin; 
import com.phonegap.api.PluginResult; 
import javax.microedition.io.*; 
import javax.microedition.io.file.*; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.OutputStream; 
import org.json.me.JSONArray; 

public static PluginResult execute(JSONArray args) { 
String[] resourseFileNames = {"file1","file2"."file3"}; 
final int length = resourseFileNames.length; 

for(int i=0; i<length; i++) { 
    String srcFile = "file:///store/home/user/sample/www" + resourseFileNames[i]; 
    FileConnection srcConn = (FileConnection) Connector.open(srcFile, Connector.READ); 
    InputStream in = srcConn.openInputStream(); 
    String dstFile = "file:///SDCard/MyAppName/www" + resourseFileNames[i]; 
    FileConnection dstConn = (FileConnection)Connector.open(dstFile, Connector.WRITE); 
    OutputStream out = dstConn.openOutputStream(); 
    // Copy the bits from instream to outstream 
    byte[] buf = new byte[1024]; 
    int len; 
    while ((len = in.read(buf)) > 0) { 
     out.write(buf, 0, len); 
    } 
    in.close(); 
    inConn.close(); 
    out.close(); 
    outConn.close(); 
} 
    String value = "OK"; 
return new PluginResult(PluginResult.Status.OK, value); 
} 

我正在使用Phonegap如果这有什么区别。谢谢。

Answer 1

你没有正确打开流。相反，您应该为源文件和目标文件使用单独的FileConnection。然后使用 FileConnection#openInputStream()打开InputStream和FileConnection#openOutputStream()打开OutputStream。

代码片段：

for(int i=0; i<length; i++) { 
    try { 
     String srcFile = "file:///store/home/user/sample/www" + resourseFileNames[i]; 
     FileConnection srcConn = (FileConnection) Connector.open(srcFile, Connector.READ); 
     InputStream in = srcConn.openInputStream(); 

     String dstFile = "file:///SDCard/myAppName/www" + resourseFileNames[i]; 
     FileConnection dstConn = (FileConnection)Connector.open(dstFile, Connector.WRITE); 
     OutputStream out = dstConn.openOutputStream(); 

     // Copy the bits from instream to outstream 
     byte[] buf = new byte[1024]; 
     int len; 
     while ((len = in.read(buf)) > 0) { 
      out.write(buf, 0, len); 
     } 

     in.close(); 
     srcConn.close(); 

     out.close(); 
     dstConn.close(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
} 

更新1：导致“找不到符号”错误固定几个错别字。

UPDATE 2：用try/catch（catch IOException）将代码包围起来。