我在我的应用程序中使用 mapView。在我的模拟器上，我得到的是黑屏而不是这张地图。我已经添加了权限并添加了<uses-library android:name="com.google.android.maps"/>标签。当我在模拟器上运行我的应用程序时，它显示黑屏而不是地图。
public class MainActivity extends MapActivity {
MapView mv;
MapController mc;
GeoPoint mPoint;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mv = (MapView) findViewById(R.id.map);
mv.setBuiltInZoomControls(true);
mv.setSatellite(true);
mc = mv.getController();
mPoint = new GeoPoint(70, 30);
mc.animateTo(mPoint);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), android.R.drawable.sym_action_email);
MarkerOverlay mo = new MarkerOverlay(bitmap);
mv.getOverlays().add(mo);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
class MarkerOverlay extends Overlay{
Bitmap marker;
public MarkerOverlay(Bitmap bitmap) {
this.marker = bitmap;
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
Point p = new Point();
mapView.getProjection().toPixels(mPoint, p);
canvas.drawBitmap(marker, p.x, p.y,null);
}
}
}
布局.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.google.android.maps.MapView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/map"
android:apiKey="0N2w90XW-PeM2vP4D4yfM2CoLRfIF6nnZAr2Cqg" />
</LinearLayout>
清单.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.overlays"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="5"
android:targetSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<uses-library android:name="com.google.android.maps"/>
<activity
android:name="com.example.overlays.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>