我正在尝试编写一个使用 google maps api 版本 2 的 android 应用程序。
在 Debug 中，应用程序在执行指令时崩溃：
setContentView(R.layout.activity_poi_map);
这是错误：
源附件不包含文件 Layoutinflater.class 的源
我不明白原因。在标题中我导入了整个班级
android.view.*
提前感谢您的任何回答。
这是代码：
public class PoiMap extends FragmentActivity {
private GoogleMap pMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent callerIntent = getIntent();
final LatLng userCoord = callerIntent.getParcelableExtra("userCoord");
final Poi poi = (Poi) callerIntent.getSerializableExtra("poi");
setContentView(R.layout.activity_poi_map);
setUpMapIfNeeded(userCoord);
// Sets a callback that's invoked when the camera changes.
pMap.setOnCameraChangeListener(new OnCameraChangeListener() {
@Override
/* Only use the simpler method newLatLngBounds(boundary, padding) to generate
* a CameraUpdate if it is going to be used to move the camera *after* the map
* has undergone layout. During layout, the API calculates the display boundaries
* of the map which are needed to correctly project the bounding box.
* In comparison, you can use the CameraUpdate returned by the more complex method
* newLatLngBounds(boundary, width, height, padding) at any time, even before the
* map has undergone layout, because the API calculates the display boundaries
* from the arguments that you pass.
* @see com.google.android.gms.maps.GoogleMap.OnCameraChangeListener#onCameraChange(com.google.android.gms.maps.model.CameraPosition)
*/
public void onCameraChange(CameraPosition arg0) {
// Move camera.
if (poi != null){
LatLng poiCoord = poi.getLatLng();
pMap.addMarker(new MarkerOptions()
.position(poiCoord)
.title(poi.getName())
.snippet(poi.getCategory())
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_star)));
Log.d("userCoord", userCoord.toString());
Log.d("poiCoord", poiCoord.toString());
double minY = Math.min(userCoord.latitude, poiCoord.latitude);
double minX = Math.min(userCoord.longitude, poiCoord.longitude);
double maxY = Math.max(userCoord.latitude, poiCoord.latitude);
double maxX = Math.max(userCoord.longitude, poiCoord.longitude);
Log.d("minY", " " + minY);
Log.d("minX", " " + minX);
Log.d("maxY", " " + maxY);
Log.d("maxX", " " + maxX);
LatLng northEast = new LatLng(maxY, maxX);
LatLng southWest = new LatLng(minY, minX);
LatLngBounds bounds = new LatLngBounds(southWest, northEast);
// move camera
pMap.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 40));
// Remove listener to prevent position reset on camera move.
pMap.setOnCameraChangeListener(null);
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_poi_map, menu);
return true;
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded(new LatLng(0.0, 0.0));
}
private void setUpMapIfNeeded(LatLng coord) {
// Do a null check to confirm that we have not already instantiated the map.
if (pMap == null) {
// Try to obtain the map from the SupportMapFragment.
pMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (pMap != null) {
setUpMap(coord);
}
}
}
private void setUpMap(LatLng userCoord) {
pMap.addMarker(new MarkerOptions()
.position(userCoord)
.title("Your location")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_user)));
pMap.animateCamera(CameraUpdateFactory.newLatLng(userCoord));
/* public static CameraUpdate newLatLngZoom (LatLng latLng, float zoom)
* Returns a CameraUpdate that moves the center of the screen to a latitude
* and longitude specified by a LatLng object, and moves to the given zoom
* level.
* Parameters
* latLng a LatLng object containing the desired latitude and longitude.
* zoom the desired zoom level, in the range of 2.0 to 21.0.
* Values below this range are set to 2.0, and values above it are set to 21.0.
* Increase the value to zoom in. Not all areas have tiles at the largest zoom levels.
* Returns
* a CameraUpdate containing the transformation.
*/
pMap.animateCamera(CameraUpdateFactory.newLatLngZoom(userCoord, 15));
}
}
