Eclipse 开发 Android, Hello, MapView （学习5）
Hello, MapView学习地址： http://androidappdocs.appspot.com/guide/tutorials/views/hello-mapview.html
HelloItemizedOverlay.java代码
package com.example.test;import java.util.ArrayList;import android.graphics.drawable.Drawable;import com.google.android.maps.ItemizedOverlay;import com.google.android.maps.OverlayItem;public class HelloItemizedOverlay extends ItemizedOverlay {private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();public HelloItemizedOverlay(Drawable defaultMarker) {super(boundCenterBottom(defaultMarker));// TODO Auto-generated constructor stub}@Overridepublic int size() {return mOverlays.size();}public void addOverlay(OverlayItem overlay) { mOverlays.add(overlay); populate();}@Overrideprotected OverlayItem createItem(int i) {return mOverlays.get(i);}}
HelloMapView1.java代码
package com.example.test;import java.util.List;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.widget.LinearLayout;import android.widget.ZoomControls;import com.google.android.maps.GeoPoint;import com.google.android.maps.MapActivity;import com.google.android.maps.MapView;import com.google.android.maps.Overlay;import com.google.android.maps.OverlayItem;public class HelloMapView1 extends MapActivity {LinearLayout linearLayout;MapView mapView;ZoomControls mZoom;List<Overlay> mapOverlays;Drawable drawable;HelloItemizedOverlay itemizedOverlay; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mapView = (MapView) findViewById(R.id.mapview); mapView.setBuiltInZoomControls(true); mapOverlays = mapView.getOverlays(); drawable = this.getResources().getDrawable(R.drawable.androidmarker); itemizedOverlay = new HelloItemizedOverlay(drawable); GeoPoint point = new GeoPoint(19240000,-99120000); OverlayItem overlayitem = new OverlayItem(point, "", ""); itemizedOverlay.addOverlay(overlayitem); mapOverlays.add(itemizedOverlay); } @Override protected boolean isRouteDisplayed() { return false; } } Layout->mail.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/mainlayout" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <com.google.android.maps.MapView android:id="@+id/mapview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:clickable="true" android:apiKey="Your Maps API Key" /><LinearLayout android:id="@+id/zoomview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@id/mapview" android:layout_centerHorizontal="true"/></RelativeLayout>
执行 android Application ，发现无法显示google的地图，请知道原因的朋友告诉一下我，谢谢。
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