將文件複製到SD卡

我拼命試圖從我的原始文件夾複製文件到SD卡，但它不會工作！該文件只是不顯示在文件管理器中，我給出的路徑（通過意圖）的程序也找不到它。這就是我想...將文件複製到SD卡

private void CopyAssets() throws IOException { 
     String path = Environment.getExternalStorageDirectory() + "/jazz.pdf"; 
     InputStream in = getResources().openRawResource(R.raw.jazz); 
     FileOutputStream out = new FileOutputStream(path); 
     byte[] buff = new byte[1024]; 
     int read = 0; 
    try { 
     while ((read = in.read(buff)) > 0) { 
      out.write(buff, 0, read); 
     } 
    } finally { 
     in.close(); 

     out.close(); 
    } 
}

這之後，我嘗試...

try { 
     CopyAssets(); 

    } catch (IOException e1) { 
     e1.printStackTrace(); 
    } 

    String aux = Environment.getExternalStorageDirectory() + "/jazz.pdf"; 

    Uri path = Uri.parse(aux); 

    Intent intent = new Intent(Intent.ACTION_VIEW); 

    intent.setDataAndType(path, "application/pdf"); 
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 

    try { 

     startActivity(intent); 

    } catch (ActivityNotFoundException e) { 

     Toast.makeText(bgn1.this, "No Application Available to View PDF", 
       Toast.LENGTH_SHORT).show(); 
    }

來源

2012-03-13 user1123530

你給使用許可權android.permission.WRITE_EXTERNAL_STORAGE每@SadeshkumarPeriyasamy的評論 – 2012-03-13 09:36:30

檢查權限。另外，嘗試通過使用'FileOutputStream out = new FileOutputStream（new File（Environment.getExternalStorageDirectory（），「/jazz.pdf」））創建輸出路徑' – 2012-03-13 09:39:25

@SadeshkumarPeriyasamy是的，我有！在我的Android清單中： – user1123530 2012-03-13 09:40:04

只要寫在finally塊，讓我知道發生什麼事out.flush();，

finally { 
     out.flush(); 
     in.close(); 
     out.close(); 
     }

更新：

工作代碼：

private void CopyAssets() throws IOException 
{  
    InputStream myInput = getResources().openRawResource(R.raw.jazz); 
    String outFileName = Environment.getExternalStorageDirectory() + "/jazz.pdf"; 
    OutputStream myOutput = new FileOutputStream(outFileName); 
    // transfer bytes from the input file to the output file 
    byte[] buffer = new byte[1024]; 
    int length; 
    while ((length = myInput.read(buffer)) > 0) 
    { 
     myOutput.write(buffer, 0, length); 
    } 
    // Close the streams 
    myOutput.flush(); 
    myOutput.close(); 
    myInput.close(); 
    } 
}

來源

2012-03-13 09:36:22 user370305

非常感謝！ :)解決了它。 – user1123530 2012-03-13 09:49:55

將文件複製到SD卡

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