我正在尝试在一个片段中集成谷歌地图...应用程序之前一直运行良好，但突然崩溃了。
我查看了以下链接...但这些都对我没有用： 尝试获取Google Maps V2 Android应用程序中空数组的长度
为什么谷歌地图V2突然崩溃，提示java.lang.NullPointerException: Attempt to get length of null array？
我的代码如下：
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
MapsInitializer.initialize(getActivity());
View bottomSheet = fragmentLayout.findViewById(R.id.bottomSheet);
fap = (FloatingActionButton) fragmentLayout.findViewById(R.id.fap);
fap.setOnClickListener(this);
bottomSheetTitle = (TextView) fragmentLayout.findViewById(R.id.bottomSheetTitle);
bottomSheetAddress = (TextView) fragmentLayout.findViewById(R.id.bottomSheetAddress);
bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
@Override
public void onStateChanged(@NonNull View bottomSheet, int newState) {
if (newState == BottomSheetBehavior.STATE_HIDDEN) {
fap.setVisibility(View.GONE);
// text1.setText("Collapse Me!");
} else {
fap.setVisibility(View.VISIBLE);
// text1.setText("Expand Me!");
}
}
@Override
public void onSlide(@NonNull View bottomSheet, float slideOffset) {
}
});
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
// getDetails(1);
// bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
switch (GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity())) {
case ConnectionResult.SUCCESS:
Toast.makeText(getActivity(), "SUCCESS", Toast.LENGTH_SHORT).show();
mapView = (MapView) fragmentLayout.findViewById(R.id.map);
if(mapView != null)
mapView.onCreate(savedInstanceState);
// Gets to GoogleMap from the MapView and does initialization stuff
if (mapView != null) {
Toast.makeText(getActivity(), "Getting map", Toast.LENGTH_SHORT).show();
mapView.getMapAsync(this);
}
break;
case ConnectionResult.SERVICE_MISSING:
Toast.makeText(getActivity(), "SERVICE MISSING", Toast.LENGTH_SHORT).show();
break;
case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED:
Toast.makeText(getActivity(), "UPDATE REQUIRED", Toast.LENGTH_SHORT).show();
break;
default:
// Toast.makeText(getActivity(), GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity()), Toast.LENGTH_SHORT).show();
break;
}
// googleMap.setMyLocationEnabled(true);
}
@Override
public void onMapReady(GoogleMap googleMap) {
// Toast.makeText(getActivity(), "Map is ready to use", Toast.LENGTH_SHORT).show();
this.map = googleMap;
map.getUiSettings().setMyLocationButtonEnabled(false);
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), 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.
Toast.makeText(getActivity(), "Oops permission denied", Toast.LENGTH_SHORT).show();
return;
}
map.setMyLocationEnabled(true);
map.getUiSettings().setMyLocationButtonEnabled(true);
mClusterManager = new ClusterManager<Location>(getActivity(), map);
map.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
@Override
public void onCameraIdle() {
// Toast.makeText(getActivity(), "camera moved", Toast.LENGTH_SHORT).show();
getLocationByRadius(map.getCameraPosition().target.latitude, map.getCameraPosition().target.longitude);
}
});
map.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() {
@Override
public void onCameraChange(CameraPosition cameraPosition) {
getLocationByRadius(map.getCameraPosition().target.latitude, map.getCameraPosition().target.longitude);
}
});
map.setOnCameraIdleListener(mClusterManager);
map.setOnMarkerClickListener(mClusterManager);
mClusterManager.setOnClusterItemClickListener(new ClusterManager.OnClusterItemClickListener<Location>() {
@Override
public boolean onClusterItemClick(Location location) {
getDetails(location.getLocationId());
return false;
}
});
checkPermission();
}
XML布局：
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context="rollwithme.com.rollwithme.Fragments.ParkingFragment" app:layout_behavior="@string/appbar_scrolling_view_behavior">
<com.google.android.gms.maps.MapView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map" />
<include layout="@layout/fragment_location_details" />
<android.support.design.widget.FloatingActionButton
android:src="@drawable/ic_expand_less_white_24dp"
android:id="@+id/fap"
app:fabSize="normal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="@id/bottomSheet"
android:visibility="gone"
app:backgroundTint="@color/colorPrimary"
app:layout_anchorGravity="top|right|end"
android:layout_marginRight="@dimen/cardViewPadding"/>
</android.support.design.widget.CoordinatorLayout>
我正在LG G3上进行测试......应用在华为Y6 Pro上运行良好......以前也可以在G3上运行.....
我收到的错误消息是：
FATAL EXCEPTION: main
Process: rollwithme.com.rollwithme, PID: 4401
java.lang.NullPointerException: Attempt to get length of null array
at maps.G.a.a(Unknown Source)
at maps.V.N.a(Unknown Source)
at maps.D.e.a(Unknown Source)
at maps.D.p.a(Unknown Source)
at maps.ad.ae.a(Unknown Source)
at maps.ad.t.a(Unknown Source)
at maps.ad.R.a(Unknown Source)
at uo.onTransact(:com.google.android.gms.DynamiteModulesB:66)
at android.os.Binder.transact(Binder.java:380)
at com.google.android.gms.maps.internal.IMapViewDelegate$zza$zza.onCreate(Unknown Source)
at com.google.android.gms.maps.MapView$zza.onCreate(Unknown Source)
at com.google.android.gms.dynamic.zza$3.zzb(Unknown Source)
at com.google.android.gms.dynamic.zza$1.zza(Unknown Source)
at com.google.android.gms.maps.MapView$zzb.zzbru(Unknown Source)
at com.google.android.gms.maps.MapView$zzb.zza(Unknown Source)
at com.google.android.gms.dynamic.zza.zza(Unknown Source)
at com.google.android.gms.dynamic.zza.onCreate(Unknown Source)
at com.google.android.gms.maps.MapView.onCreate(Unknown Source)
at rollwithme.com.rollwithme.Fragments.ParkingFragment.onActivityCreated(ParkingFragment.java:163)
at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:2089)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1133)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1638)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1240)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1088)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1614)
at android.view.View.measure(View.java:17496)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1438)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:724)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:615)
at android.view.View.measure(View.java:17496)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:700)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:767)
at android.view.View.measure(View.java:17496)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:17496)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1438)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:724)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:615)
at android.view.View.measure(View.java:17496)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.view.View.measure(View.java:17496)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1438)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:724)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:615)
at android.view.View.measure(View.java:17496)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2636)
at android.view.View.measure(View.java:17496
mapView.on~()？这就是对我有效的方法。 - Juan José Melero Gómez