带有 IMG 以及日期和时间戳的附件文件前缀

Question

我正在使用 FileSystemStorage 来存储用户可以共享的文件（如果他们愿意）。存储效果很好，但是当用户选择共享（仅限 Android 设备）文件时，附件的前缀为 IMG_DATE_TIME_，然后是文件名。这种情况仅在第二次共享文件时发生。第一次尝试很好。到目前为止，Gmail、Hotmail 和 WhatsApp 也是如此。我已经用 txt、csv 和 xlsx 文件对此进行了测试，它们都执行相同的操作。我做错了什么吗？任何帮助将不胜感激。下面的测试用例：-

public void FSStoragePage(Form mainForm){
    Form form = new Form("File System Storage", new BorderLayout());
    form.getToolbar().setBackCommand("", e -> mainForm.showBack());

    Container northcnt = new Container(new BoxLayout(BoxLayout.Y_AXIS));
    Container centercnt = new Container(new BoxLayout(BoxLayout.Y_AXIS));
    centercnt.setScrollableY(true);
    Container southcnt = new Container(new BoxLayout(BoxLayout.Y_AXIS));

    TextField tf_fileName = new TextField("", "File name", 3, TextArea.ANY);

    TextField tf_txtBody = new TextField("Text Body", "Enter text", 3, TextArea.ANY);

    Button b_saveTxt = new Button("Save");
    Button b_shareTxt = new Button("Share");

    String s_emailSubject = "";
    Message m = new Message("");
    String s_emailAddr = "";

    FileSystemStorage fs = FileSystemStorage.getInstance();
    String testDir = fs.getAppHomePath() + "testDirectory/";

    b_saveTxt.addActionListener(actionEvent -> {

        boolean bool_exists = fs.exists(testDir);

        if(!bool_exists){

            String testDirNew = fs.getAppHomePath() + "testDirectory/";
            fs.mkdir(testDirNew);

        }

        try (OutputStream os = fs.openOutputStream(testDir + tf_fileName.getText().trim()+".txt")) {

            String fileContent = tf_txtBody.getText().trim();
            os.write(fileContent.getBytes("UTF-8"));

        } catch (IOException err) {
            Log.e(err);
        }

    });

    b_shareTxt.addActionListener(actionEvent -> {

        String filePath = testDir+tf_fileName.getText().trim()+".txt";
        if (fs.exists(filePath)) {
            m.setAttachment(filePath);
            m.setAttachmentMimeType("text/plain");
            Display.getInstance().sendMessage(new String[]{s_emailAddr}, s_emailSubject, m);
        } else {
            Dialog.show("Error", "The file does not exist.", "OK", null);
        }

    });

    centercnt.add(tf_fileName);
    centercnt.add(tf_txtBody);
    centercnt.add(b_saveTxt);
    centercnt.add(b_shareTxt);

    form.add(BorderLayout.NORTH, northcnt).add(BorderLayout.CENTER, centercnt).add(BorderLayout.SOUTH, southcnt);
    form.show();
}

Answer 1

这已在此处讨论过。

解决方案是在您的

init(Object)

方法中定义它，这将禁用该行为：

Display.getInstance().setProperty("DeleteCachedFileAfterShare", "true");