java - 向 Spanned String 添加额外的文本会去掉我的粗体文本。

Question

我接受用户输入并将该文本作为粗体文本添加到警告对话框的编辑文本框中。问题是，当用户第二次、第三次或第四次(等等)添加更多文本时，之前的粗体文本消失，只显示最新的粗体文本。感谢您的帮助，谢谢。

这是我的代码:

newField.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            storyText = story.getText().toString();


            AlertDialog.Builder builder = new AlertDialog.Builder(
                    getActivity());
            builder.setTitle("Title");

            // Set up the input
            final EditText input = new EditText(getActivity());
            input.setHint("Ex: Noun, Verb, Color, etc");
            // Specify the type of input expected; this, for example, sets
            // the input as a password, and will mask the text
            builder.setView(input);

            // Set up the buttons
            builder.setPositiveButton("Add Field",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            int y;
                            for(int i = 0; i < 200; i++)
                            {
                                field[i] = "";
                            }
                            for(y = 0; y < 200; y++)
                            {
                                if(field[y].equals(""))
                                {
                                    field[y] = input.getText().toString();
                                    break;
                                }
                            }


                            storyText = storyText + " " + "<b>" + field[y] + "</b>" + " ";
                            storyText.replaceAll("\n", "<br />");
                            spanned = Html.fromHtml(storyText);
                            story.setText(spanned);

                            Toast.makeText(
                                    getActivity().getApplicationContext(),
                                    "Field Added", Toast.LENGTH_SHORT).show();
                        }
                    });
            builder.setNegativeButton("Cancel",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            dialog.cancel();
                        }
                    });

            builder.show();


        }
    });

Answer 1

您从 TextView 获取的是字符串而不是 SpannableString，因此您丢失了格式设置。

目前你有类似的东西:

String storyText = story.getText().toString();
// ...
storyText = storyText + " " + "<b>" + field[y] + "</b>" + " ";
storyText.replaceAll("\n", "<br />");
spanned = Html.fromHtml(storyText);
story.setText(spanned);

但是你可能想尝试这样的事情:

SpannableString spannedStoryText = new SpannableString(story.getText());
// ...
String additionalStoryText = " " + "<b>" + field[y] + "</b>" + " ";
additionalStoryText.replaceAll("\n", "<br />"); // assuming you only want this for the appended text.
spannedStoryText = new SpannableString(TextUtils.concat(spannedStoryText, Html.fromHtml(additonalStoryText)));
story.setText(spannedStoryText);