Android Open Source - WATisRain Directions View

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License

The source code is released under:

MIT License

Java Source Code

package com.lucky.watisrain.map;
//from  ww w . j  a v a 2 s . c  o m
import java.util.List;

import com.lucky.watisrain.R;
import com.lucky.watisrain.backend.data.Path;
import com.lucky.watisrain.backend.data.Route;
import com.lucky.watisrain.backend.data.RouteStep;

import android.content.Context;
import android.text.Html;
import android.util.AttributeSet;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.view.View;
import android.view.View.OnClickListener;

/*
 * The widget that displays the directions in a list
 */
public class DirectionsView extends LinearLayout implements OnClickListener {
  
  // Directions backed by an internal TextView
  TextView textview;
  
  
  // HTML strings for directions.
  // Collapsed directions only show start and end location.
  CharSequence directions_long = "";
  CharSequence directions_collapsed = "";
  
  
  // What is the textview showing?
  static final int STATE_NONE = 1;    // not showing a route
  static final int STATE_COLLAPSED = 2;  // collapsed form
  static final int STATE_LONG = 3;    // long form
  int current_state = STATE_NONE;
  

  public DirectionsView(Context context, AttributeSet attrs) {
    super(context, attrs);
    textview = new TextView(context);
    textview.setText(R.string.select_start_instruction);
    addView(textview);
    setOnClickListener(this);
  }

  public void selectDestination(String destinationName) {
    String selectionHtml = "Selected: <b>" + destinationName + "</b>";
    textview.setText(Html.fromHtml(selectionHtml +
        "<br>" + getResources().getString(R.string.select_destination_instruction)));
    current_state = STATE_NONE;
  }

  public void unselectDestination() {
    textview.setText(getResources().getString(R.string.select_start_instruction));
    current_state = STATE_NONE;
  }
  
  
  @Override
  public void onClick(View v) {
    
    // Flip between long and collapsed directions
    if(current_state == STATE_COLLAPSED){
      textview.setText(directions_long);
      current_state = STATE_LONG;
    }
    else if(current_state == STATE_LONG){
      textview.setText(directions_collapsed);
      current_state = STATE_COLLAPSED;
    }
    
  }
  
  
  /**
   * Given a calculated route, generate human readable directions and set
   * the internal TextView to display it
   */
  public void generateDirectionsFromRoute(Route route){
    
    StringBuilder sb = new StringBuilder();
    
    String overall_building1 = route.getStart().getBuildingName();
    int overall_floor1 = route.getStart().getFloorNumber();
    String overall_building2 = route.getEnd().getBuildingName();
    int overall_floor2 = route.getEnd().getFloorNumber();
    sb.append("Route found: <b>");
    sb.append(overall_building1);
    sb.append("</b> to <b>");
    sb.append(overall_building2);
    sb.append("</b>");
    
    
    // Cutoff point for collapsed directions
    directions_collapsed = Html.fromHtml("[<tt>+</tt>] " + sb.toString());
    
    
    sb.append("<br><br>");
    
    // Start
    sb.append("Start at <b>");
    sb.append(overall_building1);
    sb.append(" (floor ");
    sb.append(overall_floor1);
    sb.append(")</b>");
    sb.append("<br><br>");
    
    List<RouteStep> steps = route.getRouteSteps();
    for(int i = 0; i < steps.size(); i++){
      
      RouteStep step = steps.get(i);
      
      int floor1 = step.getStart().getFloorNumber();
      String build2 = step.getEnd().getBuildingName();
      String build2_formatted = "<b>" + build2 + "</b>";
      int floor2 = step.getEnd().getFloorNumber();
      
      String instr;
      if(step.getPathType() == Path.TYPE_OUTSIDE){
        instr = "Take a walk outside to " + build2_formatted;
      }
      
      else if(step.getPathType() == Path.TYPE_INDOOR_TUNNEL){
        instr = "Take the indoor tunnel to " + build2_formatted;
      }
      
      else if(step.getPathType() == Path.TYPE_UNDERGROUND_TUNNEL){
        instr = "Take the underground tunnel to " + build2_formatted;
      }
      
      else if(step.getPathType() == Path.TYPE_BRIEFLY_OUTSIDE){
        instr = "Step briefly outside to " + build2_formatted;
      }
      
      else if(step.getPathType() == Path.TYPE_INSIDE){
        instr = "Go straight through to " + build2_formatted;
      }
      
      else if(step.getPathType() == Path.TYPE_STAIR){
        
        // Customize the grammar for stairs
        String up_or_down;
        int difference;
        if(floor2 < floor1){
          up_or_down = "down";
          difference = floor1 - floor2;
        }else{
          up_or_down = "up";
          difference = floor2 - floor1;
        }
        
        String s_if_plural = "";
        if(difference > 1)
          s_if_plural = "s";
        
        instr = "Climb " + up_or_down + " " + difference + " floor" + s_if_plural
            + " to " + build2_formatted + " <b>(floor " + floor2 + ")</b>";
      }else{
        throw new RuntimeException("Bad path type");
      }
      
      sb.append("  ");
      sb.append(i+1);
      sb.append(". ");
      sb.append(instr);
      sb.append("<br>");
    }
    
    sb.append("<br>");
    sb.append("Arrive at <b>");
    sb.append(overall_building2);
    sb.append(" (floor ");
    sb.append(overall_floor2);
    sb.append(")</b>");
    
    // Long directions
    directions_long = Html.fromHtml("[<tt>-</tt>] " + sb.toString());
    textview.setText(directions_long);
    current_state = STATE_LONG;
  }
  
}

Java Source Code List

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