如何將TXT文件寫入SD卡？

Question

File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS); 
File logfile = new File(path, "andrometer.txt"); 
String[] assignArr = new String [7]; 

assignArr[0]= finalValue + "17"; 
assignArr[1]= range + "16"; 
assignArr[2]= activeMode; 

if (assignArr.length > 0) 
{ 
    try { 
     if (path.canWrite()){ 
      FileWriter filewriter = new FileWriter(logfile); 
      BufferedWriter out = new BufferedWriter(filewriter); 
      for (int i1=0; i1<assignArr.length; i1++) 
      { 
       out.write(assignArr[0] + "\n"); 
       out.write(assignArr[1] + "\n"); 
       out.write(assignArr[2] + "\n"); 
       Toast.makeText(AndroMeter.this, "out: " + assignArr[2], Toast.LENGTH_LONG).show(); 
      } 
      out.close(); 
     } 
    } catch (IOException e) { 
     Log.e("TAG", "Could not write file " + e.getMessage()); 
    } 
}; 

這段代碼幾個星期前工作，現在我似乎無法得到它。我有正確的清單權限我相信，我試圖寫入根目錄而不是特定的文件夾，我一直在用虛擬數據代替變量名稱進行測試。目前沒有文件正在創建。

Answer 1

嘗試寫：

FileOutputStream fo=new FileOutputStream("/sdcard/filename");