Android Open Source - EditTextMentions Edit Text Mentions

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From Project

Back to project page EditTextMentions.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.PPinera.edittextmentions;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.content.Context;
import android.graphics.Rect;
import android.text.Editable;
import android.text.Layout;
import android.text.Selection;
import android.text.TextWatcher;
//from  w  ww  . j  a v a2  s .  c  o m
public class EditTextMentions extends android.widget.EditText implements TextWatcher {
  private boolean selectorShown;
  private OnMentionListener mentionListener;
  private int mentionStart;
  private int mentionEnd;

  public interface OnMentionListener extends TextWatcher{
    public void OnMentionStarted(String sequence);
    public void OnMentionFinished();
  }
  
  public EditTextMentions(Context context) {
    super(context);
    this.selectorShown = false;
    this.mentionStart = 0;
    this.mentionEnd = 0;
    this.addTextChangedListener(this);
  }
  
  public int getCurrentCursorLine()
  {    
      int selectionStart = Selection.getSelectionStart(this.getText());
      Layout layout = this.getLayout();

      if (!(selectionStart == -1)) {
          return layout.getLineForOffset(selectionStart);
      }

      return -1;
  }

  public int getCurrentLineTop(){
    int y = 0;
    int currentLine = getCurrentCursorLine();
    Rect r = new Rect();
    this.getLineBounds(currentLine, r);
    y = r.top-this.getPaddingTop();
    return y;
  }
  
  @Override
  public void afterTextChanged(Editable s) {
    // TODO Auto-generated method stub
    
  }

  @Override
  public void beforeTextChanged(CharSequence s, int start, int count,
      int after) {
    // TODO Auto-generated method stub
    
  }

  @Override
  public void onTextChanged(CharSequence s, int start, int before, int count) {
    checkIfMentioning(getMentioningSequence(s, start, count));
  }
  
  public void setSelectedMention(String mention){
    try{
      this.getText().replace(mentionStart, mentionEnd, mention+" ");
    }catch ( IndexOutOfBoundsException exception){
      System.out.println("Not valid start-end values for the mention");
    }
  }
  
  private void checkIfMentioning(String mentionSequence){
    if(mentionSequence != null){
        if( !selectorShown &&  mentionListener !=null){
          mentionListener.OnMentionStarted(mentionSequence);
        }
      }
      if( mentionSequence == null && selectorShown && mentionListener!=null){
        mentionListener.OnMentionFinished();
    }
  }
  private String getMentioningSequence(CharSequence s, int start, int count){
    
    Pattern pattern = Pattern.compile("(?<=\\s|^)@([a-z|A-Z|\\.|\\-|\\_|0-9]*)(?=\\s|$)");
    Matcher matcher = pattern.matcher(s.toString());
    String mention = null;
      while (matcher.find()) {
        if( matcher.start(1) <= start+count && 
          start+count <= matcher.end(1)
          ){
          mentionStart=matcher.start(1);
          mentionEnd=matcher.end(1);
          mention = matcher.group(1);
          break;
        }
      }
      return mention;
  }
  
  public void setMentionListener(OnMentionListener mentionListener) {
    this.mentionListener = mentionListener;
  }
}

Java Source Code List

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