我正在使用新的Android Google Maps API.
我创建了一个包含MapFragment的活动.在活动中,onResume我将标记设置为GoogleMap对象,然后为地图定义包含所有标记的边界框.
这是使用以下伪代码:
LatLngBounds.Builder builder = new LatLngBounds.Builder();
while(data) {
LatLng latlng = getPosition();
builder.include(latlng);
}
CameraUpdate cameraUpdate = CameraUpdateFactory
.newLatLngBounds(builder.build(), 10);
map.moveCamera(cameraUpdate);
调用map.moveCamera()导致我的应用程序崩溃与以下堆栈:
Caused by: java.lang.IllegalStateException:
Map size should not be 0. Most likely, layout has not yet
at maps.am.r.b(Unknown Source)
at maps.y.q.a(Unknown Source)
at maps.y.au.a(Unknown Source)
at maps.y.ae.moveCamera(Unknown Source)
at com.google.android.gms.maps.internal.IGoogleMapDelegate$Stub
.onTransact(IGoogleMapDelegate.java:83)
at android.os.Binder.transact(Binder.java:310)
at com.google.android.gms.maps.internal.IGoogleMapDelegate$a$a
.moveCamera(Unknown Source)
at com.google.android.gms.maps.GoogleMap.moveCamera(Unknown Source)
at ShowMapActivity.drawMapMarkers(ShowMapActivity.java:91)
at ShowMapActivity.onResume(ShowMapActivity.java:58)
at android.app.Instrumentation
.callActivityOnResume(Instrumentation.java:1185)
at …我有一个MapFragment显示地图
如果用户随地图离开活动(或设备进入睡眠状态)然后返回onResume被调用,我将地图移回标记.
但是当我移动相机时,我得到一个例外
07-23 16:28:42.725: E/AndroidRuntime(19095): java.lang.RuntimeException: Unable to resume activity {ecm2.android/ecm2.android.EMGNoteMapActivity}: java.lang.IllegalStateException: Map size should not be 0. Most likely, layout has not yet occured for the map view.
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2742)
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2771)
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2235)
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.os.Handler.dispatchMessage(Handler.java:99)
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.os.Looper.loop(Looper.java:137)
07-23 16:28:42.725: E/AndroidRuntime(19095): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-23 16:28:42.725: E/AndroidRuntime(19095): at java.lang.reflect.Method.invokeNative(Native Method) …谁能解释之间的区别
OnMapReadyCallback.OnMapReady(GoogleMap googleMap)
和
GoogleMap.OnMapLoadedCallback.OnMapLoaded()
对我来说不是很清楚.