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package wyf.wpf;					//宣告套件名稱
 
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Point;
 
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.Projection;
 
public class ArrowOverLay extends Overlay{
	Bitmap bmpArrow;		//宣告Bitmap物件
	GeoPoint gp;			//宣告GeoPoint物件
	public ArrowOverLay(GeoPoint gp,Bitmap bmp){
		super();			//呼叫父類別建構子
		this.gp = gp;		//初始化GeoPoint
		bmpArrow = bmp;		//初始化Bitmap
	}
	@Override
	public void draw(Canvas canvas, MapView mapView, boolean shadow) {
		if(!shadow){
			Projection proj = mapView.getProjection();	//取得Projection物件
			Point p = new Point();
			proj.toPixels(gp, p);			//將真實地理座標轉換為螢幕上的座標
			canvas.drawBitmap(bmpArrow, 
					p.x-bmpArrow.getWidth()/2, 
					p.y-bmpArrow.getHeight(), 
					null);					//繪製箭頭圖片
		}
	}
}

Main.java:12: error: class ArrowOverLay is public, should be declared in a file named ArrowOverLay.java
public class ArrowOverLay extends Overlay{
       ^
Main.java:3: error: package android.graphics does not exist
import android.graphics.Bitmap;
                       ^
Main.java:4: error: package android.graphics does not exist
import android.graphics.Canvas;
                       ^
Main.java:5: error: package android.graphics does not exist
import android.graphics.Point;
                       ^
Main.java:7: error: package com.google.android.maps does not exist
import com.google.android.maps.GeoPoint;
                              ^
Main.java:8: error: package com.google.android.maps does not exist
import com.google.android.maps.MapView;
                              ^
Main.java:9: error: package com.google.android.maps does not exist
import com.google.android.maps.Overlay;
                              ^
Main.java:10: error: package com.google.android.maps does not exist
import com.google.android.maps.Projection;
                              ^
Main.java:12: error: cannot find symbol
public class ArrowOverLay extends Overlay{
                                  ^
  symbol: class Overlay
Main.java:13: error: cannot find symbol
	Bitmap bmpArrow;		//??Bitmap??
	^
  symbol:   class Bitmap
  location: class ArrowOverLay
Main.java:14: error: cannot find symbol
	GeoPoint gp;			//??GeoPoint??
	^
  symbol:   class GeoPoint
  location: class ArrowOverLay
Main.java:15: error: cannot find symbol
	public ArrowOverLay(GeoPoint gp,Bitmap bmp){
	                    ^
  symbol:   class GeoPoint
  location: class ArrowOverLay
Main.java:15: error: cannot find symbol
	public ArrowOverLay(GeoPoint gp,Bitmap bmp){
	                                ^
  symbol:   class Bitmap
  location: class ArrowOverLay
Main.java:21: error: cannot find symbol
	public void draw(Canvas canvas, MapView mapView, boolean shadow) {
	                 ^
  symbol:   class Canvas
  location: class ArrowOverLay
Main.java:21: error: cannot find symbol
	public void draw(Canvas canvas, MapView mapView, boolean shadow) {
	                                ^
  symbol:   class MapView
  location: class ArrowOverLay
Main.java:23: error: cannot find symbol
			Projection proj = mapView.getProjection();	//??Projection??
			^
  symbol:   class Projection
  location: class ArrowOverLay
Main.java:24: error: cannot find symbol
			Point p = new Point();
			^
  symbol:   class Point
  location: class ArrowOverLay
Main.java:24: error: cannot find symbol
			Point p = new Point();
			              ^
  symbol:   class Point
  location: class ArrowOverLay
Main.java:20: error: method does not override or implement a method from a supertype
	@Override
	^
19 errors

Standard output is empty