Question

问题是在点击URL范围时处理我自己的操作。我写了自定义URLSpan，但它没有用。

这是我自定义的URLSpan：

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，我会得到原生的android对话框来选择电子邮件程序。我在互联网上找到的所有例子都是一样的。

编辑：根据@CommonWare的回答。我只是需要：

...
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检索文本，将其包装在新的SpannableString中...然后永远不会更新TextView。因此clickifyTextView()正在修改TextView中的内容副本，因此不会影响TextView。

在setText()中的跨度转换循环后，尝试在TextView上调用clickifyTextView()。

Answer 2

使用任何movementMethod = LinkMovementMethod()时将ClickableSpan设置为文本视图

android自定义URLSpan无法正常工作

2 个答案: