Question

我一直试图在我的java代码中写入SD卡，但每当我检查我的卡时，文件夹和文件都不存在;我知道对于KitKat你必须使用.getExternalFilesDir，但到目前为止没有任何工作。我目前的代码：

 String DataIn = PhoneNumber + "," + dataLong + "," + dataLat;
        File storageDirectory = new File (this.getExternalFilesDir(null), "location.txt");
        if(!storageDirectory.exists()) {
            try {
                storageDirectory.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        String Directory = storageDirectory.toString();
        try
        {
            FileOutputStream fout = new FileOutputStream(storageDirectory, true);
            OutputStreamWriter myoutwriter = new OutputStreamWriter(fout);
            myoutwriter.write(DataIn);
            myoutwriter.close();
            Toast.makeText(getBaseContext(),"Saved", Toast.LENGTH_SHORT).show();
        }
        catch (Exception e)
        {
            Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
        }

Answer 1

试试这个：

File storageDirectory = new File(Environment.getExternalStorageDirectory(), "location.txt");

确保您在清单中拥有此权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

无法在Android KitKat上将txt文件写入SD卡

1 个答案: