Android的跨度click事件Android的跨度click事件(android span cl

2019-05-12 06:52发布

好。 这是我的问题。

  1. 我需要的用户正则表达式来菲力了一切,除了信件,然后我需要一个$字标签内包住找到的词。 与此STR = str.replaceAll(图案, “$ 0”);. 现在我过滤了所有正确的元素(标点符号,数字等),但其包围每个字中的每一个字母的一个标签不字。 让我怎么使用正则表达式组中的字母词?

从“(标签打开)T(A接近)(标签打开)H(紧密)(标签打开)I(A接近)(标签开放)S(紧密)(标签打开)I(A接近)(标签开放)S(紧密)(开放标签)W(A接近)(标签开放)R(紧密)(标签开放)O(紧密)(标签打开)N(A接近)(标签开放)G(A接近)“;

至 :

“(标签打开)本(亲密)(开放标签)是(密切)(标签打开)右(亲密)”;

然后我让他们可以点击的,我需要抓住click事件,并获得点击的文字在屏幕上的位置,因为我想使用点击事件,使工具提示显示出来的只是点击下面的字。 谢谢您的帮助。

公共类MainActivity延伸活动{

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:

最新的代码,请参见链接形式github上

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

您需要删除的起源跨度设置之前新跨越。 下面请看
ClickableSpan的onclick()不工作URLSpan?

编辑
您可以捕获任何跨度click事件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开发者”
这是更好的方式来增加处理器性能的LinkMovementMethodExt类。
您可以捕获所有跨区这些均作为Message对象。

剪断在的onTouchEvent方法的代码:

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

可以预期的处理程序在跨越你处理程序类。 可它是处理灵活的方式。
希望能帮助你。



以上的TextView文本是<a href='/a'>aaaa</a>123456<a href='/b'>bbbb</b>7890
我明白你的要求:
点击'AAAA',你要得到它s href value '/a', click 'bbbb',get it ŞHREF '/ B'; 不触发这是在网页浏览器中打开默认的动作。
如果我的理解是正确的,你可以这样做:

  • 设置为LinkMovementMethod TextView的,等: textview.setMovementMethod(LinkMovementMethodExt.getInstance(handler, URLSpan.class));
  • 获取利益跨度,这里是URLSpan。
    在您处理程序的handleMessage方法,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具有只要你喜欢,你可以分配的颜色值的颜色属性。

怎么做?

  • 第一步,得到当前点击跨度。

  • 第二步,设置BackgroundColorSpan查看当前的点击跨度



Answer 2:

假设你要点击TextView的各个单词? 我din't了解将所有字母词在您的评论。

下面可以用来点击个人作品,并显示在祝酒。

    public class MainActivity extends Activity {

    TextView _tv;
    String[] each;
    SpannableString ss1;
    Button b;
    EditText et;
    String s;
    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    b= (Button) findViewById(R.id.button1);
    et = (EditText) findViewById(R.id.ed);
    _tv = (TextView) findViewById( R.id.tv );
    b.setOnClickListener(new OnClickListener()
    {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        s=et.getText().toString();
        _tv.setText("");
        for(int i=0;i<s.length();i++)
        {
            each = s.split("\\s+");
        }
        for(int i=0;i<each.length;i++)
        {
            System.out.println("................"+each[i]);
            ss1=  new SpannableString(each[i]);
            //StyleSpan boldSpan = new StyleSpan( Typeface.BOLD );
            //spannable.setSpan( boldSpan, 41, 52, Spannable.SPAN_INCLUSIVE_INCLUSIVE );
            ss1.setSpan(new MyClickableSpan(each[i]), 0, ss1.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            _tv.append(ss1); 
            _tv.append(" "); 

        }
        _tv.setMovementMethod(LinkMovementMethod.getInstance());
    }
       });
      }
      class MyClickableSpan extends ClickableSpan{ 
      String clicked;
          public MyClickableSpan(String string) {
    // TODO Auto-generated constructor stub
       clicked =string;
      }
      //clickable span
      public void onClick(View textView) {
      //do something


      Toast.makeText(MainActivity.this,clicked ,
        Toast.LENGTH_SHORT).show();
     }
     @Override
     public void updateDrawState(TextPaint ds) {
     ds.setColor(Color.BLACK);//set text color 
     ds.setUnderlineText(false); // set to false to remove underline
     }
    }
    }


文章来源: android span click event