我在Fragment中遇到了一个奇怪的问题。
我实现了某种菜单，其中包含通过ViewPager显示的项目。有些项目可以显示简短的GoogleMap作为预览。 “项目是片段”由ViewPager加载。为了显示上一个和下一个项目，ViewPager也被包装在FrameLayout容器中（例如ViewPager with previous and next page boundaries）。
问题在于该地图无法加载。去年，我使用Eclipse发布了一个版本，没有问题。现在，我使用另一台Mac，并将该项目导入Android Studio。一切正常。我在logcat中遇到错误，但是map在其他使用MapFragment的活动中显示：
E/dalvikvm﹕ Could not find class 'android.app.AppOpsManager', referenced from method com.google.android.gms.common.GooglePlayServicesUtil.zza
E/dalvikvm﹕ Could not find class 'android.app.AppOpsManager', referenced from method com.google.android.gms.common.hg.a
方法1：
自定义片段（android MapView in Fragment）中的MapView
显示了MapView，但您只能看到地图的网格。在ViewPager中滚动时，地图所在的位置会出现一个黑色矩形。
<LinearLayout
android:id="@+id/itemInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/itemSubTitle"
android:layout_centerHorizontal="true"
android:orientation="vertical"
>
<TextView
android:id="@+id/itemDistanceInfo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="0dp"
android:paddingTop="0dp"
android:textSize="6pt"
android:textColor="@color/white"
android:text="ca. 89 km"
android:visibility="gone"
/>
<RelativeLayout
android:id="@+id/itemInfoPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:background="@color/white“
android:layout_marginTop="8dp"
android:padding="5dp"
android:visibility="gone"
>
<include layout="@layout/price_menu_fragment"/>
</RelativeLayout>
<FrameLayout
android:id="@+id/itemInfoPicture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:background="@color/white“
android:layout_marginTop="8dp"
android:padding="5dp"
android:visibility="visible"
>
<ImageView
android:id="@+id/itemImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:src="@drawable/menue_info"
android:visibility="invisible"
/>
<com.google.android.gms.maps.MapView
android:id="@+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</FrameLayout>
</LinearLayout>
方法2：
自定义Fragment中的SupportMapFragment
这里只有黑色视图，但在左上角显示有Google徽标。在ViewPager中滚动不会像方法1中那样显示黑色矩形。
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
我希望有人能帮助我。
最佳答案
import com.google.android.gms.maps.SupportMapFragment;
SupportMapFragment mMapFragment = SupportMapFragment.newInstance();
FragmentManager fm = fragment.getChildFragmentManager();
fm.beginTransaction().add(R.id.map, mMapFragment).commit();
mMapFragment.getMapAsync(this);
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
mGoogleMap.setMyLocationEnabled(true);
buildGoogleApiClient();
mGoogleApiClient.connect();
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(getContext())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
@Override
public void onConnected(Bundle bundle) {
if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
//place marker at current position
mGoogleMap.clear();
//setLocation(mLastLocation.getLatitude(), mLastLocation.getLongitude());
}
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(50000); //50 seconds
mLocationRequest.setFastestInterval(30000); //30 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
//mLocationRequest.setSmallestDisplacement(0.1F); //1/10 meter
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int i) {
Toast.makeText(customAdapter.getContext(), "onConnectionSuspended", Toast.LENGTH_SHORT).show();
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(customAdapter.getContext(), "onConnectionFailed", Toast.LENGTH_SHORT).show();
}
@Override
public void onLocationChanged(Location location) {
sourceLat = location.getLatitude();
sourceLng = location.getLongitude();
getRestaurantDetails();
latLng = new LatLng(location.getLatitude(), location.getLongitude());
//latLng = new LatLng(lat, lng);
//Log.wtf("Lat lng", lat + " " + lng);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 18));
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
其中fragment是您的viewPagerFragment的实例
在xml中
<LinearLayout
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="250dp" />
关于android - GoogleMap不会在ViewPager中加载，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/30122131/