Question

好的，到目前为止我已经成功创建了该文件夹。在CreateFolderActivity.java中以下是创建文件夹代码：

btn_cFolder.setOnClickListener(new OnClickListener() {       
  public void onClick(View v) 
            {
             String dateN = edit_date.getText().toString();

             new AlertDialog.Builder(DatePickerActivity.this, AlertDialog.THEME_HOLO_DARK)  

                .setTitle("Create Folder")
                .setMessage("Confirm to create " + dateN +" folder ?")
                .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {

                    public void onClick(DialogInterface dialog, int which) { 

                         Environment.getExternalStorageDirectory();
                         String dateN = edit_date.getText().toString();
                         edit_date.setTypeface(edit_date.getTypeface(), Typeface.BOLD_ITALIC);
                            File folder = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/CalendarNote/" + dateN);
                            boolean success = true;
                                if (!folder.exists()) {
                                    success = folder.mkdirs();
                                }
                                if (success) {
                                        Toast.makeText(getBaseContext(), "You have successfully created." , Toast.LENGTH_LONG ).show();
                                        Intent w = new Intent(DatePickerActivity.this, SelectTypeActivity.class);
                                        startActivity(w);


                                } else {
                                    Toast.makeText(getBaseContext(), "You have Failed to create." , Toast.LENGTH_LONG ).show();
                                }

                    }
                 })
                .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { 
                        // do nothing
                    }
                 })
                .setIcon(R.drawable.ic_launcher)
                 .show();
            }
   });

我也成功创建了txt文件。但现在唯一的问题是路径位置我尝试了很多方法来连接这两个将文件保存到文件夹中。到目前为止，我希望txt文件像这样保存/CalendarNote/TheDateIPick/hello.txt。

现在我只能保存到CalendarNote所在的文件夹中。以下代码是我修改但未成功的代码。请帮帮我。

public void SaveListener() {         
    imb_savefile = (ImageButton) findViewById(R.id.imb_savefile);

    imb_savefile.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

             edit_date = (EditText) findViewById(R.id.edit_date);

            String t = edit_title.getText().toString();
             new AlertDialog.Builder(WriteNoteActivity.this, AlertDialog.THEME_HOLO_DARK)
            .setTitle("Save Note")
            .setMessage("Confirm to save " + t +"?")
            .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) { 
             String content = edit_content.getText().toString();
             String title = edit_title.getText().toString();
             String dateN = edit_date.getText().toString();
             boolean success = true;
                 try {
                    File sdCardDir = Environment.getExternalStorageDirectory();  
                    File targetFile;
                    targetFile = new File(sdCardDir.getCanonicalPath()  
                            + "/CalendarNote/"+ dateN);
                    File file=new File(targetFile + "/"+title+".txt");

                    if(!targetFile.exists()){
                        success = targetFile.mkdir();  
                    }
                    RandomAccessFile raf = new RandomAccessFile(file, "rw");  
                    raf.seek(file.length());  

                    raf.write(content.getBytes());  
                    raf.close();  
                } catch (IOException e) {
                    e.printStackTrace();
                } 
                 if (success) {
                    Toast.makeText(getBaseContext(), "You have successfully created." , Toast.LENGTH_LONG ).show();



            } else {
                Toast.makeText(getBaseContext(), "You have Failed to create." , Toast.LENGTH_LONG ).show();
            }
                    //Toast.makeText(getBaseContext(), "Note have successfully saved." , Toast.LENGTH_LONG ).show();
                }
             })
            .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) { 

                    Toast.makeText(getBaseContext(), "Note Cancelled." , Toast.LENGTH_LONG ).show();
                }
             })
            .setIcon(R.drawable.ic_launcher)
             .show();
        }

    });

}

Answer 1

是的，有可能。有关详细信息，请参阅此处：http://developer.android.com/guide/topics/data/data-storage.html#filesInternal

Android java：如何编写字符串文本并将其保存到txt.file中

1 个答案: