Android Open Source - qshuttle_driver G P S Location Overlay

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Back to project page qshuttle_driver.

License

The source code is released under:

MIT License

Java Source Code

/**
 * //from   w ww  . jav  a2 s .  c  o  m
 */
package com.qshuttle.car;

import java.util.ArrayList;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Paint.Cap;
import android.graphics.Paint.Style;
import android.graphics.Point;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationManager;
import android.widget.Toast;

import com.amap.mapapi.core.GeoPoint;
import com.amap.mapapi.core.OverlayItem;
import com.amap.mapapi.map.ItemizedOverlay;
import com.amap.mapapi.map.MapView;



/**
 * @author wangpeifeng
 *
 */
public class GPSLocationOverlay extends ItemizedOverlay {
  
  private ArrayList<OverlayItem> listItems;
  
  private OverlayItem item;
  
  private Context context;

  private Drawable marker;
  
  private Location location;
  
  private GeoPoint point;
  
  public GPSLocationOverlay(Context context, Drawable marker, Location location) {
    super(marker);
    // TODO Auto-generated constructor stub
    
    this.context = context;
    
    this.marker = marker;
    
    this.location = location;
    
    point = new GeoPoint((int)(location.getLatitude()*1E6), (int)(location.getLongitude()*1E6));
    
    item = new OverlayItem(point, location.getProvider(), location.getAccuracy() + context.getResources().getString(R.string.meter));
    
    listItems = new ArrayList<OverlayItem>();
    
    listItems.add(item);
    
    populate();
    
    
  }

  /* (non-Javadoc)
   * @see com.amap.mapapi.map.ItemizedOverlay#createItem(int)
   */
  @Override
  protected OverlayItem createItem(int index) {
    // TODO Auto-generated method stub
    return listItems.get(index);
  }

  /* (non-Javadoc)
   * @see com.amap.mapapi.map.ItemizedOverlay#size()
   */
  @Override
  public int size() {
    // TODO Auto-generated method stub
    return listItems.size();
  }
  
  
  public void onLocationChanged(Location location){
    
    this.location = location;
    
    point = new GeoPoint((int)(location.getLatitude()*1E6), (int)(location.getLongitude()*1E6));
    
    item = new OverlayItem(point, location.getProvider(), location.getAccuracy() + context.getResources().getString(R.string.meter) );
    
    listItems.remove(0);
    
    listItems.add(item);
    
  }

  /* (non-Javadoc)
   * @see com.amap.mapapi.map.ItemizedOverlay#onTap(int)
   */
  @Override
  protected boolean onTap(int arg0) {
    // TODO Auto-generated method stub
    
    Toast.makeText(context, listItems.get(arg0).getTitle() + ":"+ listItems.get(arg0).getSnippet(), Toast.LENGTH_LONG).show();
    
    return super.onTap(arg0);
    
  }

  /* (non-Javadoc)
   * @see com.amap.mapapi.map.ItemizedOverlay#draw(android.graphics.Canvas, com.amap.mapapi.map.MapView, boolean)
   */
  @Override
  public void draw(Canvas canvas, MapView mapview, boolean shadow) {
    // TODO Auto-generated method stub
//    super.draw(canvas, mapview, shadow);
    
    Point out = new Point();
    
    Bitmap bitmap = null;
    
    Paint paint = new Paint();
    
    Matrix matrix; 
    
    float scale;
    
    mapview.getProjection().toPixels(point, out);
    
    bitmap = ((BitmapDrawable)marker).getBitmap() ;
        
    matrix = new Matrix();
    
    scale = (float)1;
    
    matrix.postTranslate(-bitmap.getWidth()*scale/2, -bitmap.getHeight()*scale/2);
    
//    scale = (float) 0.5;
    
    matrix.postScale(scale, scale);
          
    matrix.postRotate(location.getBearing());
  
    matrix.postTranslate(out.x, out.y);
          
    canvas.drawBitmap(bitmap, matrix, paint);
    
    
    //int mapscale = mapview.getScale(mapview.getZoomLevel());
    
    double mapscale = mapview.getMetersPerPixel(mapview.getZoomLevel());
    
    float radius = (float)(location.getAccuracy()/mapscale);
    
    if(radius > bitmap.getWidth()/2){
    
      paint = new Paint();
    
      int color = context.getResources().getColor(R.color.transparent_accuracy);
    
      paint.setColor(color);
    
      paint.setStyle(Style.FILL);
    
      paint.setStrokeCap(Cap.ROUND);
    
      canvas.drawCircle(out.x, out.y, radius, paint);

      color = context.getResources().getColor(R.color.circle_accuracy);
      
      paint.setColor(color);
    
      paint.setStyle(Style.STROKE);
    
//      paint.setStrokeWidth(2);
      
      paint.setStrokeCap(Cap.ROUND);
    
      canvas.drawCircle(out.x, out.y, radius, paint);
    
    }
  }

}

Java Source Code List

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