Android Open Source - TextViewWithLinks Link Movement Method Ext

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Back to project page TextViewWithLinks.

License

The source code is released under:

Apache License

Java Source Code

package pt.fjss.TextViewWithLinks;
// www  .  ja  v a2s  .c  o  m
import java.io.Serializable;

import android.text.Layout;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.method.MovementMethod;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.TextView;

public class LinkMovementMethodExt extends LinkMovementMethod{

  private static LinkMovementMethod sInstance;

  private Class spanClass = null;

  static LinkMovementListener listener;

  public static MovementMethod getInstance(LinkMovementListener _listener, Class _spanClass) {
    if (sInstance == null) {
      sInstance = new LinkMovementMethodExt();
      listener = _listener;
      ((LinkMovementMethodExt) sInstance).spanClass = _spanClass;
    }

    return sInstance;
  }

  @Override
  public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
    int action = event.getAction();
    
    int mDownX = 0, mDownY = 0;

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

      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 spans
      Object[] spans = buffer.getSpans(off, off, spanClass);
      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);

          listener.onKeyDownOnLink(obj);

          return true;
        } else if (action == MotionEvent.ACTION_UP) {
          MessageSpan obj = new MessageSpan();
          obj.setView(widget);
          obj.setObj(spans);
          Log.d("FRED","ActionUp");
          listener.onKeyUpOnLink(obj);
          return true;
        }
        
        
      } else {
        if (action == MotionEvent.ACTION_UP) {

          listener.onKeyDownOnTextView();
        }
        
      }
    }
    else
    {
      if (Math.abs(mDownY - event.getY()) > 100)
      listener.onScroll(widget);
    }

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

  public interface LinkMovementListener {
    void onKeyDownOnLink(MessageSpan msg);

    void onKeyUpOnLink(MessageSpan msg);

    void onKeyDownOnTextView();
    
    void onScroll(TextView widget);
  }
}

Java Source Code List

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