我正在尝试从SupportMapFragment获取地图,但它返回null.从我读到的这可能是因为片段尚未完全显示,因此没有地图存在?!我尝试使用executePendingTransactions()修复它,但到目前为止没有成功.
任何想法如何解决它?
这是代码
private GoogleMap map; private SupportMapFragment mapFragment; @Override public void onCreate( Bundle savedInstanceState ) { //... super.onCreate( savedInstanceState ); setContentView( R.layout.screen_mission2 ); GoogleMapOptions mapOptions = new GoogleMapOptions(); mapOptions.mapType(GoogleMap.MAP_TYPE_norMAL) .compassEnabled(true) .rotateGesturesEnabled(false) .tiltGesturesEnabled(false); android.support.v4.app.FragmentManager myFragmentManager = getSupportFragmentManager(); android.support.v4.app.FragmentManager.enableDebugLogging(true); mapFragment = SupportMapFragment.newInstance(mapOptions); FragmentTransaction fragmentTransaction = myFragmentManager.beginTransaction(); fragmentTransaction.add(R.id.mapFragment,mapFragment); fragmentTransaction.commit(); myFragmentManager.executePendingTransactions(); if(mapFragment == null) Base.log("mapFragment==null"); if(map==null){ map = mapFragment.getMap(); Base.log("map should have been initialized"); if(map==null) Base.log("map still null"); } }
和布局文件:
<fragment android:id="@+id/mapFragment" android:name="com.google.android.gms.maps.SupportMapFragment" android:layout_width="match_parent" android:layout_height="match_parent" />
它返回以下日志
V/FragmentManager(24224): add: SupportMapFragment{4078c4b8 id=0x7f06003d} V/FragmentManager(24224): Allocated fragment index SupportMapFragment{4078c4b8 #1 id=0x7f06003d} V/FragmentManager(24224): moveto CREATED: SupportMapFragment{4078c4b8 #1 id=0x7f06003d} D/EMR (24224): map should have been initialized D/EMR (24224): map still null
解决方法
原文地址:https://www.jb51.cc/android/314200.html
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