android 自定义 URLSpan 无效

Question

问题是在单击 URL 跨度时处理我自己的操作。我写了自定义 URLSpan 但它不起作用。

这是我的习惯URL跨度：

public class CustomURLSpan extends android.text.style.URLSpan {
    private Command mClickAction;

    public CustomURLSpan(String url, Command clickAction) {
        super(url);
        mClickAction = clickAction;
    }

    @Override
    public void onClick(View widget) {
        try {
            mClickAction.execute();
        } catch (Exception e) {
        }
    }

    public static void clickifyTextView(TextView tv, Command clickAction) {
        SpannableString current = new SpannableString(tv.getText());
        URLSpan[] spans =
                current.getSpans(0, current.length(), URLSpan.class);

        for (URLSpan span : spans) {
            int start = current.getSpanStart(span);
            int end = current.getSpanEnd(span);

            current.removeSpan(span);
            current.setSpan(new CustomURLSpan(span.getURL(), clickAction), start, end, 0);
        }
    }

    public interface Command {
        void execute();
    }
}

我在这里使用它：

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    Bundle bundle = getArguments();
    String message = bundle.getString("message");
    final Activity activity = getActivity();
    text = new TextView(activity);
    text.setText(message);

    Linkify.addLinks(text, Linkify.EMAIL_ADDRESSES);
    CustomURLSpan.clickifyTextView(text, new CustomURLSpan.Command() {
        @Override
        public void execute() {
            //I want to do my stuff here, but not working
        }
    });
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity());
    alertDialogBuilder.setView(text);
    alertDialogBuilder.setNegativeButton("Close", new DialogInterface.OnClickListener() {
        ...
}

但是如果我点击 url，我会看到原生的 android 对话框来选择电子邮件程序。我在网上找到的所有例子都是一样的。

编辑： 根据@CommonWare 的回答。我只需要：

...
public static void clickifyTextView(TextView tv, Command clickAction) {
    SpannableString current = new SpannableString(tv.getText());
    URLSpan[] spans =
            current.getSpans(0, current.length(), URLSpan.class);

    for (URLSpan span : spans) {
        int start = current.getSpanStart(span);
        int end = current.getSpanEnd(span);

        current.removeSpan(span);
        current.setSpan(new CustomURLSpan(span.getURL(), clickAction), start, end, 0);
        tv.setText(current); //this is what I need
    }
}

public interface Command {
    void execute();
}

Answer 1

clickifyTextView() 从 TextView 中检索文本，将其包装在新的 SpannableString 中...然后永远不会更新 TextView。所以 clickifyTextView() 正在修改 TextView 中内容的副本，因此不会影响 TextView.

尝试在 clickifyTextView() 中的跨度转换循环之后在 TextView 上调用 setText()。

Answer 2

在使用任何 ClickableSpan

时将 movementMethod = LinkMovementMethod() 设置为您的文本视图

android 自定义 URLSpan 无效

android custom URLSpan not working

android

urlspan