我正在尝试在操作栏中使用选项卡时检索 Google 地图片段。当我加载选项卡式页面时，地图加载正常，但我想获取地图对象，以便将其居中、添加标记等。
有没有办法做到这一点，如果有的话，有人会这么好心告诉我怎么做吗？
这是我的标签页的代码...
我正在使用的具体方法是public static class Map extends Fragment
public class Page3Activity extends FragmentActivity implements ActionBar.TabListener {
final Context context = this;
static GoogleMap map;
static MapView mMapView;
DatabaseHandler db = new DatabaseHandler(context);
AppSectionsPagerAdapter mAppSectionsPagerAdapter;
ViewPager mViewPager;
@SuppressLint("NewApi")
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.page3);
// Create the adapter that will return a fragment for each of the three primary sections
// of the app.
mAppSectionsPagerAdapter = new AppSectionsPagerAdapter(getSupportFragmentManager());
ColorDrawable colorDrawable = new ColorDrawable();
final ActionBar actionBar = getActionBar();
colorDrawable.setColor(0xff9ACC00);
actionBar.setBackgroundDrawable(colorDrawable);
actionBar.setTitle("Road Trip Calculator");
actionBar.setSubtitle("Trip Information");
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_SHOW_HOME | ActionBar.DISPLAY_SHOW_TITLE );
// Specify that the Home/Up button should not be enabled, since there is no hierarchical
// parent.
actionBar.setHomeButtonEnabled(false);
// Specify that we will be displaying tabs in the action bar.
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Set up the ViewPager, attaching the adapter and setting up a listener for when the
// user swipes between sections.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mAppSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// When swiping between different app sections, select the corresponding tab.
// We can also use ActionBar.Tab#select() to do this if we have a reference to the
// Tab.
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mAppSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by the adapter.
// Also specify this Activity object, which implements the TabListener interface, as the
// listener for when this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mAppSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
/*
* ACTIONBAR TOP BAR CODE
*/
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to one of the primary
* sections of the app.
*/
public static class AppSectionsPagerAdapter extends FragmentPagerAdapter {
public AppSectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
//Switching between tabs
@Override
public Fragment getItem(int i) {
switch (i) {
case 0:
return new Map();
case 1:
return new Directions();
case 2:
return new poiList();
case 3:
return new tripInfo();
default:
i=i+1;
}
return null;
}
@Override
public int getCount() {
return 4;
}
@Override
public String getPageTitle(int position) {
String tabName = "";
if(position == 0) {
tabName = "Map";
} else if(position == 1) {
tabName = "Directions";
} else if(position == 2) {
tabName = "POI List";
} else if(position == 3) {
tabName = "Trip Info";
}
return tabName;
}
}
/**
* Map
*/
public static class Map extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.maptab, container, false);
//I want to be able to do something like this...
/*
GoogleMap map;
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map1);
map = fm.getMap();
map.DOSOMETHING
*/
return rootView;
}
}
/**
* Directions
*/
public static class Directions extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.directionstab, container, false);
((TextView) rootView.findViewById(android.R.id.text1)).setText(
"directions");
return rootView;
}
}
/**
* POI List
*/
public static class poiList extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.poitab, container, false);
((TextView) rootView.findViewById(android.R.id.text1)).setText(
"poiList");
return rootView;
}
}
/**
* Trip Info
*/
public static class tripInfo extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tripinfotab, container, false);
((TextView) rootView.findViewById(android.R.id.text1)).setText(
"Trip Info");
return rootView;
}
}
}
这是我的 XML 文件 (maptab.xml)，其中有我的地图片段...
<?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" >
<fragment
android:id="@+id/map1"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"
/>
</LinearLayout>
解决了
public static class Map extends Fragment {
MapView mapView;
GoogleMap map;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.maptab, container, false);
// Gets the MapView from the XML layout and creates it
mapView = (MapView) v.findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
// Gets to GoogleMap from the MapView and does initialization stuff
map = mapView.getMap();
//map.getUiSettings().setMyLocationButtonEnabled(false);
//map.setMyLocationEnabled(true);
map.addMarker(new MarkerOptions().position(new LatLng(50.167003,19.383262)));
// Needs to call MapsInitializer before doing any CameraUpdateFactory calls
try {
MapsInitializer.initialize(this.getActivity());
} catch (GooglePlayServicesNotAvailableException e) {
e.printStackTrace();
}
// Updates the location and zoom of the MapView
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(43.1, -87.9), 10);
map.animateCamera(cameraUpdate);
return v;
}
@Override
public void onResume() {
mapView.onResume();
super.onResume();
}
@Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
}