android span点击事件

Question

好.这些是我的问题.

1. 我需要使用正则表达式来输出除字母之外的所有内容,然后我需要将找到的单词包含在$ word标记内.使用此str = str.replaceAll(pattern,"$ 0");. 现在我正在过滤所有正确的元素(标点符号,数字等),但它包含了一个标签中每个单词中的每个字母而不是单词.那么如何使用正则表达式将字母分组为单词？

从"(标签打开)t(关闭)(标签打开)h(关闭)(标签打开)i(关闭)(标签打开)s(关闭)(标签打开)i(a关闭)(标签打开)s(关闭)(标签打开)w(关闭)(标签打开)r(关闭)(标签打开)o(关闭)(标签打开)n(a关闭)(标签打开)g(关闭)";

至 :

"(标签打开)此(关闭)(标签打开)是(关闭)(标签打开)右(关闭)";

然后我让它们可点击,我需要抓住点击事件并在点击的单词上获得屏幕上的位置,因为我想使用点击的事件使工具提示显示在点击的单词下方.谢谢您的帮助.

公共类MainActivity扩展Activity {

public String text = "This is just a sentence to test you. 23 this is another number23!g?";
public TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    text = explode(text);

    tv = (TextView) findViewById(R.id.tv1);

    tv.setLinksClickable(true);
    tv.setMovementMethod(LinkMovementMethod.getInstance());

    Spanned article = Html.fromHtml(text, null, null);
    setHTML(article);
}


public void setHTML(Spanned html) {
      SpannableString message = new SpannableString(html.toString());
      Object[] spans = html.getSpans(0, html.length(), Object.class);
      for (Object span : spans) {
         int start = html.getSpanStart(span);
         int end = html.getSpanEnd(span);
         int flags = html.getSpanFlags(span);
         if (span instanceof URLSpan) {
            URLSpan urlSpan = (URLSpan) span;
            span = new CallbackSpan(urlSpan.getURL());
         }
         message.setSpan(span, start, end, flags);
      }
      tv.setText(message);
   }
    public String explode(String str){  
      String pattern = "([a-zA-Z])";
      str = str.replaceAll(pattern, "<a href=\"$0\">$0</a>");
      return str;
    }

   private final class CallbackSpan extends ClickableSpan {

      private String m_data;
      private String url_main;

      public CallbackSpan(String url) {
         m_data = url.substring(0);
         url_main = url;

      }

      public void onClick(View view) {

          TextView item = (TextView)findViewById(R.id.tv2);
          item.setText(url_main + " was clicked.");
          Log.d("item", url_main);
      }
   }

}

Answer 1

最新代码,请参阅链接表单github

message.setSpan(span, start, end, flags);

在设置新范围之前,您需要删除原始范围.请看下面
ClickableSpan的onClick()不适用于URLSpan？

编辑
您可以捕获任何跨度点击事件由extends LinkMovementMethod

    import android.os.Handler;
import android.os.Message;
import android.text.Layout;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.method.MovementMethod;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.TextView;

import java.lang.ref.WeakReference;

public class LinkMovementMethodExt extends LinkMovementMethod {
    public static final int LinkMovementMethod_Down = 1001;
    public static final int LinkMovementMethod_Up = 2002;
    private static LinkMovementMethod sInstance;
    private Class mSpanClass = null;
    private WeakReference<Handler> mWeakReference = null;

    public static MovementMethod getInstance(Handler handler, Class spanClass) {
        if (sInstance == null) {
            sInstance = new LinkMovementMethodExt();
            ((LinkMovementMethodExt) sInstance).mWeakReference = new WeakReference<>(handler);
            ((LinkMovementMethodExt) sInstance).mSpanClass = spanClass;
        }
        return sInstance;
    }

    @Override
    public boolean onTouchEvent(TextView widget, Spannable buffer,
                                MotionEvent event) {
        int action = event.getAction();

        if (action == MotionEvent.ACTION_UP ||
                action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();

            x -= widget.getTotalPaddingLeft();
            y -= widget.getTotalPaddingTop();

            x += widget.getScrollX();
            y += widget.getScrollY();

            Layout layout = widget.getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);
            /**
             * get you interest span
             */
            Object[] spans = buffer.getSpans(off, off, mSpanClass);
            if (spans.length != 0) {
                if (action == MotionEvent.ACTION_DOWN) {
                    Selection.setSelection(buffer, buffer.getSpanStart(spans[0]), buffer.getSpanEnd(spans[0]));
                    MessageSpan obj = new MessageSpan();
                    obj.setObj(spans);
                    obj.setView(widget);
                    Handler handler = mWeakReference.get();
                    if (handler != null) {
                        Message message = handler.obtainMessage();
                        message.obj = obj;
                        message.what = LinkMovementMethod_Down;
                        message.sendToTarget();
                        return true;
                    }
                    return false;
                } else if (action == MotionEvent.ACTION_UP) {
                    Handler handler = mWeakReference.get();
                    if (handler != null) {
                        MessageSpan obj = new MessageSpan();
                        obj.setView(widget);
                        Message message = handler.obtainMessage();
                        message.obj = obj;
                        message.what = LinkMovementMethod_Up;
                        message.sendToTarget();
                        return true;
                    }
                    return false;
                }
            }
        }

        return super.onTouchEvent(widget, buffer, event);
    }

    public boolean canSelectArbitrarily() {
        return true;
    }

    public boolean onKeyUp(TextView widget, Spannable buffer, int keyCode,
                           KeyEvent event) {
        return false;
    }

textView.setMovementMethod(LinkMovementMethodExt.getInstance());

编辑"android developer"
这是为LinkMovementMethodExt类添加Handler属性的更好方法. 您可以捕获作为Message对象传递的所有Spanned. onTouchEvent方法中的剪辑代码:

Message message = Handler.obtainMessage();
message.obj = buffer.getSpans(off, off, Spanned.class);//get all spanned
message.what = 111;//which value ,it is up to you
message.sendToTarget(); //send message to you target handler

您可以在处理程序类中处理预期的跨区域.可能是灵活的处理方式.
希望能帮到你.

在textview文本上面<a href='/a'>aaaa</a>123456<a href='/b'>bbbb</b>7890
我理解你的要求:
点击'aaaa',你想得到它s href value '/a', click 'bbbb',get ithref'/ b'; 不要触发在Web浏览器中打开的默认操作.
如果我理解是对的,你可以这样做:

• 为Textview等设置LinkMovementMethod:textview.setMovementMethod(LinkMovementMethodExt.getInstance(handler, URLSpan.class));
• 获得兴趣范围,这里是URLSpan.
  在你的处理程序handleMessage方法中,你可以这样做:
  

private Handler handler = new Handler() {
      public void handleMessage(Message msg) {
          int what = msg.what;
          if (what == 100) {
              Object[] spans = (Object[])msg.obj;
              for (Object span : spans) {
                  if (span instanceof URLSpan) {
                      System.out.println(((URLSpan) span).getURL());
                  }
              }
          }
      };
  };

下载演示代码

• MainActivity具有颜色属性,您可以根据需要指定哪个颜色值.

怎么做？

• Step1,获取当前点击范围.

• Step2,为当前点击范围设置BackgroundColorSpan