片段中的 Android 谷歌地图
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【中文标题】片段中的 Android 谷歌地图【英文标题】：Android Google Maps in Fragment 【发布时间】：2013-11-04 04:46:10 【问题描述】：我正在开发一个顶部有一个菜单的应用程序，该菜单内有一些按钮。我正在尝试将谷歌地图添加到其中一个按钮，但我不是很成功。我在关注this tutorial，但没有直接将谷歌地图实现到MainActivity，而是将它们添加到按下按钮时启动的片段中。一切正常。当我按下按钮时，地图会加载并且它们会正常工作。当我按下主页按钮返回MainActivity 时，它工作得很好，但是当我想再次加载地图时，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。当我加载fragment 一次（第一次）时它可以工作，但当我尝试再次加载它时它不起作用（第二次）。
编辑 v2：
我实际上自己找到了解决方案。
我所要做的就是添加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();
还是谢谢。
【问题讨论】：
我也面临同样的问题，我确实添加了onDestroyView() 方法，但它没有帮助.. 如果你能帮助我
如果你不解释你的问题，如果我没有看到代码，我帮不了你......
感谢 Izak，但我已经解决了。:)
为我工作@Izak，非常感谢！ :)
它可以工作，但它在方向更改时崩溃。我该怎么办？请帮忙
【参考方案1】：
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_
android:layout_ >
<com.google.android.gms.maps.MapView
android:id="@+id/mapview"
android:layout_
android:layout_ />
</LinearLayout>
【讨论】：
【参考方案2】：看看我的实现，它工作得很好，并且在尝试显示地图之前对设备进行一些检查，就像安装了谷歌播放服务一样。也许它会帮助你。我正在使用一个简单的 FragmentActivity 并膨胀包含 SupportedMapFragment 的布局。
代码如下：
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;
以及对应的布局：
<?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_
android:layout_
android:background="@color/greenish"
android:orientation="vertical">
<RelativeLayout
android:id="@+id/location_header"
android:layout_
android:layout_
android:layout_weight="1"
android:background="@color/greenish">
<RelativeLayout
android:id="@+id/cancel_btn"
android:layout_
android:layout_
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_
android:layout_
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_
android:layout_
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_
android:layout_
class="com.google.android.gms.maps.SupportMapFragment"/>
<RelativeLayout
android:id="@+id/save_location_layout"
android:layout_
android:layout_
android:layout_weight="1"
android:background="@color/greenish">
<LinearLayout
android:id="@+id/delete_btn"
android:layout_
android:layout_
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_
android:layout_
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_
android:layout_
android:layout_gravity="center"
android:layout_weight="1"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:src="@drawable/input_map_white"/>
</LinearLayout>
</RelativeLayout>
</LinearLayout>
【讨论】：
我敢打赌你的代码会完美运行，但我只需要包含OnDestroyView 方法。无论如何，谢谢。以上是关于片段中的 Android 谷歌地图的主要内容，如果未能解决你的问题，请参考以下文章