片段中的Android Google Maps
[英]Android Google Maps in Fragment
问题描述
我正在开发一个应用程序，该应用程序的顶部带有一个菜单，该菜单中包含一些按钮。 我正在尝试将Google Maps添加到该按钮之一，但是我不是很成功。 我正在按照本教程进行操作，但不是将Google映射直接实现为MainActivity而是将它们添加到片段中，该片段在按下按钮时启动。 一切都很好。 当我按下按钮时，地图就会加载，并且它们会按预期工作。 当我按下主屏幕按钮返回MainActivity它可以正常工作，但是当我再次加载地图时，它给了我debugging error: Class File Editor: Source not found
这是GoogleMaps片段的代码：
public class GoogleMaps extends Fragment{
private GoogleMap googleMap;
double latitude = 46.514249;
double longitude = 15.080183;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View myFragmentView = inflater.inflate(R.layout.maps_layout, container, false);
try {
// Loading map
initilizeMap();
} catch (Exception e) {
Log.e("ERROR", "ERROR IN CODE: " + e.toString());
e.printStackTrace();
}
return myFragmentView;
}
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
googleMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)));
CameraPosition cameraPosition = new CameraPosition.Builder().target(
new LatLng(latitude, longitude)).zoom(12).build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getActivity(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
}
任何帮助将不胜感激。
编辑：如果我不够具体。 当我一次（第一次）加载fragment时，它可以工作，但是当我再次尝试（第二次）加载fragment时，它不起作用。
编辑v2：我实际上自己找到了解决方案。 我要做的就是添加OnDestroyView方法：
public void onDestroyView()
{
super.onDestroyView();
Fragment fragment = (getFragmentManager().findFragmentById(R.id.map));
FragmentTransaction ft = getActivity().getFragmentManager().beginTransaction();
ft.remove(fragment);
ft.commit();
}
不管怎么说，还是要谢谢你。
2 个解决方案
解决方案1
3 2014-10-04 12:53:18
public class MapCurrentLoactionFragment extends Fragment {
public static MapView mapView;
public static GoogleMap map;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_currentlocation_map,
container, false);
try
{
// Gets the MapView from the XML layout and creates it
mapView = (MapView) v.findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
mapView.onResume();
// Gets to GoogleMap from the MapView and does initialization stuff
map = mapView.getMap();
// Changing map type
map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
// googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
// googleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
// googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
// googleMap.setMapType(GoogleMap.MAP_TYPE_NONE);
// Showing / hiding your current location
map.setMyLocationEnabled(false);
// Enable / Disable zooming controls
map.getUiSettings().setZoomControlsEnabled(true);
// Enable / Disable my location button
map.getUiSettings().setMyLocationButtonEnabled(true);
// Enable / Disable Compass icon
map.getUiSettings().setCompassEnabled(true);
// Enable / Disable Rotate gesture
map.getUiSettings().setRotateGesturesEnabled(true);
// Enable / Disable zooming functionality
map.getUiSettings().setZoomGesturesEnabled(true);
MapsInitializer.initialize(this.getActivity());
}
catch(Exception e)
{
System.out.println(e);
}
return v;
}
XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.google.android.gms.maps.MapView
android:id="@+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
解决方案2
1 2013-10-25 08:40:27
看一下我的实现是否正常，并尝试在设备上进行一些检查，然后再尝试显示地图，例如是否安装了Google Play服务。 也许会对您有帮助。 我正在使用一个简单的FragmentActivity并夸大包含SupportedMapFragment的布局。
这是代码：
public class LocationActivity extends FragmentActivity {
private GoogleMap map;
private long rec_id;
private String address;
private Marker selectedLoc;
private boolean isSessionClosed;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
BugSenseHandler.initAndStartSession(this, Constants.BugSenseKEY);
setContentView(R.layout.preview_location);
RelativeLayout cancel_btn = (RelativeLayout) findViewById(R.id.cancel_btn);
LinearLayout save_location_btn = (LinearLayout) findViewById(R.id.delete_btn);
save_location_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (address != null) {
ReceiptDataSource r = new ReceiptDataSource();
r.updateReceiptLocation(rec_id, address);
Intent returnIntent = new Intent(getBaseContext(), EditReceiptActivity.class);
returnIntent.putExtra("result", address);
setResult(RESULT_OK, returnIntent);
finish();
} else {
Utils.showToast(getApplicationContext(), getString(R.string.c_unknownLocation), Toast.LENGTH_SHORT);
}
}
});
cancel_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
if (map == null) {
map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
if (isGoogleMapsInstalled()) {
if (map != null) {
retrieveLocation();
}
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Install Google Maps");
builder.setCancelable(false);
builder.setPositiveButton("Install", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=com.google.android.apps.maps"));
startActivity(intent);
//Finish the activity so they can't circumvent the check
finish();
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
}
}
@Override
protected void onResume() {
super.onResume();
if (isSessionClosed) {
BugSenseHandler.startSession(this);
isSessionClosed = false;
}
}
@Override
protected void onPause() {
super.onPause();
BugSenseHandler.closeSession(this);
isSessionClosed = true;
}
@Override
public void onBackPressed() {
map.clear();
super.onBackPressed();
}
private void retrieveLocation() {
Intent intent = getIntent();
address = intent.getStringExtra("location");
assert address != null;
if (address.equalsIgnoreCase("")) {
address = Utils.getCurrentLocation(LocationActivity.this);
}
rec_id = intent.getLongExtra("receipt_to_update_location", 0);
final Geocoder geocoder = new Geocoder(this, Locale.US);
double latitude = 0, longitude = 0;
try {
List<Address> loc = geocoder.getFromLocationName(address, 5);
if (loc.size() > 0) {
latitude = loc.get(0).getLatitude();
longitude = loc.get(0).getLongitude();
} else {
//Toast.makeText(getBaseContext(), getResources().getString(R.string.UnableToFindLocation),Toast.LENGTH_SHORT).show();
Utils.showToast(LocationActivity.this, getString(R.string.UnableToFindLocation), Toast.LENGTH_SHORT);
}
selectedLoc = map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(address).draggable(true));
map.setOnMarkerDragListener(new GoogleMap.OnMarkerDragListener() {
@Override
public void onMarkerDragStart(Marker marker) {
}
@Override
public void onMarkerDrag(Marker marker) {
}
@Override
public void onMarkerDragEnd(Marker marker) {
try {
List<Address> addresses = geocoder.getFromLocation(selectedLoc.getPosition().latitude, selectedLoc.getPosition().longitude, 1);
StringBuilder sb = new StringBuilder();
if (addresses.size() > 0) {
Address address = addresses.get(0);
if (address.getAddressLine(0) != null)
sb.append(address.getAddressLine(0)).append(", ");
if (address.getLocality() != null)
sb.append(address.getLocality()).append(", ");
if (address.getCountryName() != null)
sb.append(address.getCountryName());
}
address = sb.toString();
} catch (IOException e) {
}
}
});
map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(latitude, longitude), 12));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(12), 2000, null);
} catch (IOException e) {
Log.e("IOException", e.getMessage());
//Toast.makeText(this, getString(R.string.c_unknownLocation), Toast.LENGTH_LONG).show();
Utils.showToast(LocationActivity.this, getString(R.string.c_unknownLocation), Toast.LENGTH_LONG);
}
}
public boolean isGoogleMapsInstalled() {
try {
ApplicationInfo info = getPackageManager().getApplicationInfo("com.google.android.apps.maps", 0);
return true;
} catch (PackageManager.NameNotFoundException e) {
return false;
}
}
以及相应的布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res/ro.gebs.captoom"
android:id="@+id/location_stuff"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/greenish"
android:orientation="vertical">
<RelativeLayout
android:id="@+id/location_header"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@color/greenish">
<RelativeLayout
android:id="@+id/cancel_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:background="@drawable/done_rounded_btn"
android:gravity="center">
<ro.gebs.captoom.utils.fonts.CustomFontTextView
android:id="@+id/retake_txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_marginTop="10dp"
android:gravity="center"
android:paddingLeft="7dp"
android:paddingRight="7dp"
android:text="@string/cancel"
android:textAllCaps="true"
android:textColor="#FFFFFF"
android:textSize="14sp"
custom:fontName="Bold"/>
</RelativeLayout>
<ro.gebs.captoom.utils.fonts.CustomFontTextView
android:id="@+id/location_txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center_vertical"
android:text="@string/location_map"
android:textAllCaps="true"
android:textColor="@color/done_color"
android:textSize="16sp"
custom:fontName="SemiBold"/>
</RelativeLayout>
<fragment
android:layout_weight="6"
android:id="@+id/map"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_width="match_parent"
android:layout_height="0dp"
class="com.google.android.gms.maps.SupportMapFragment"/>
<RelativeLayout
android:id="@+id/save_location_layout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@color/greenish">
<LinearLayout
android:id="@+id/delete_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_marginLeft="25dp"
android:layout_marginRight="25dp"
android:background="@drawable/done_btn_selector"
android:orientation="horizontal"
android:paddingBottom="7dip"
android:paddingTop="7dip"
android:weightSum="7">
<ro.gebs.captoom.utils.fonts.CustomFontTextView
android:id="@+id/delete_txt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="6"
android:background="@null"
android:paddingLeft="10dp"
android:text="@string/save_location"
android:textAllCaps="true"
android:textColor="@color/white"
android:textSize="16sp"
custom:fontName="Bold"/>
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:src="@drawable/input_map_white"/>
</LinearLayout>
</RelativeLayout>
</LinearLayout>
带有片段的Android Google Maps
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