如何在列表视图中保存自定义数组类和适配器的内容保存到Android中的文本

Question

我需要您的帮助，我是android编程的新手。我如何将列表视图中的所有内容保存到文本文件中，这是我尝试保存文件的代码，但是问题是我如何放置列表视图数组列表以获取数据，我不知道如何放置它放在哪里，请帮助保存我的列表视图的内容

Button code:
    save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                try {
                    File myFile = new File("/sdcard/mysdfile.txt");
                    myFile.createNewFile();
                    FileOutputStream fOut = new FileOutputStream(myFile);
                    OutputStreamWriter myOutWriter =
                            new OutputStreamWriter(fOut);
                    for (int i = 0; i < ChatBubbles.length; i++) {
                        myOutWriter.append(ChatBubbles[i] +"\n");
                    }

                    myOutWriter.close();
                    fOut.close();
                    Toast.makeText(getBaseContext(),
                            "Done writing SD 'mysdfile.txt'",
                            Toast.LENGTH_SHORT).show();
                } catch (Exception e) {
                    Toast.makeText(getBaseContext(), e.getMessage(),
                            Toast.LENGTH_SHORT).show();
                }
            }
        });

Chatbubble class:
package com.example.ezminute;
public class ChatBubble {

    private String content;
    private boolean myMessage;

    public ChatBubble(String content, boolean myMessage) {
        this.content = content;
        this.myMessage = myMessage;
    }

    public String getContent() {
        return content;
    }

    public boolean myMessage() {
        return myMessage;
    }
}

MessageAdapter:

    package com.example.ezminute;


public class MessageAdapter extends ArrayAdapter<ChatBubble> {

    private Activity activity;
    private List<ChatBubble> messages;

    public MessageAdapter(Activity context, int resource, List<ChatBubble> objects) {
        super(context, resource, objects);
        this.activity = context;
        this.messages = objects;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

        int layoutResource = 0; // determined by view type
        ChatBubble ChatBubble = getItem(position);
        int viewType = getItemViewType(position);

        if (ChatBubble.myMessage()) {
            layoutResource = R.layout.left_chat_bubble;
        } else {
            layoutResource = R.layout.right_chat_bubble;
        }

        if (convertView != null) {
            holder = (ViewHolder) convertView.getTag();
        } else {
            convertView = inflater.inflate(layoutResource, parent, false);
            holder = new ViewHolder(convertView);
            convertView.setTag(holder);
        }

        //set message content
        holder.msg.setText(ChatBubble.getContent());

        return convertView;
    }

    @Override
    public int getViewTypeCount() {
        // return the total number of view types. this value should never change
        // at runtime. Value 2 is returned because of left and right views.
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        // return a value between 0 and (getViewTypeCount - 1)
        return position % 2;
    }

    private class ViewHolder {
        private TextView msg;

        public ViewHolder(View v) {
            msg = (TextView) v.findViewById(R.id.txt_msg);
        }
    }
}