外部存储到内部存储

Question

I am making a program that would save the inputted word in an EditText to a textfile in sd card. However, there is something wrong about mounting sd card in my tablet so im thinking of saving the text file to internal storage instead. Can anyone please help me how to switch this to internal storage? any comment would be greatly appreciated.thank you.

Here's my code:

public void writeToSDFile() {


    File root = android.os.Environment.getExternalStorageDirectory(); 
    tv.append("\nExternal file system root: "+root);    

    File dir = new File (root.getAbsolutePath());
    dir.mkdirs();
    File file = new File(dir, "wordlist.txt");

    try {   


        FileOutputStream f = new FileOutputStream(file);           

        PrintWriter pw = new PrintWriter(f);
        pw.println(stringword);
        pw.append(stringword);        

        pw.flush();
        pw.close();
        f.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
        Log.i(TAG, "******* File not found.");
    } catch (IOException e) {
        e.printStackTrace();
    }   
    tv.append("\n\nFile written to "+file);    


}//end writeToSDFile

Answer 1

这应该可以帮助您： http ： //developer.android.com/guide/topics/data/data-storage.html

Answer 2

Since external storage is removable, you should not presume that it exists all the time. Hence before doing any io operation, check the storage state.

About your question to internal storage, There are two ways: 1. In application storage (app cache) - refer: Environment.getDataDirectory() 2. In common Data directory - refer: Context.getCacheDir().

Hope this helps.