如何導出我的sharedPreferences文件

Question

你好我的應用程序我想備份SharedPrefernces文件到我的設備存儲。我試圖導出它像我出口我的數據庫文件，但它給了我一個錯誤。「java.io.filenotfoundexception/data/data/com.example.myapp/shared_prefs/myPref：打開失敗：ENOENT（沒有這樣的文件或diractory） 這裏是我的代碼：

@SuppressLint("SdCardPath") 
private void exportPref() throws IOException { 
     // Open your local db as the input stream 
    try { 
     String inFileName = "/data/data/com.bibas.workclocks/shared_pref/"+MySharedPreferences.MY_TEMP; 
     File dbFile = new File(inFileName); 
     FileInputStream fis = new FileInputStream(dbFile); 

     String outFileName = Environment.getExternalStorageDirectory()+ "/MyPrefs"; 

     // Open the empty db as the output stream 
     OutputStream output = new FileOutputStream(outFileName); 
     // transfer bytes from the inputfile to the outputfile 
     byte[] buffer = new byte[1024]; 
     int length; 
     while ((length = fis.read(buffer)) > 0) { 
      output.write(buffer, 0, length); 
     } 
     // Close the streams 
     output.flush(); 
     output.close(); 
     fis.close(); 
    } catch (Exception e) { 
     Toast.makeText(context, e.toString(), Toast.LENGTH_LONG) 
       .show(); 
    } 
    Toast.makeText(context, 
      "'", 
      Toast.LENGTH_LONG).show(); 
} 

Answer 1

的工作示例，請參見本post節約SharedPreferences