我已经浏览了大量的问题,但似乎无法让它们中的任何一个工作。根据我的理解,我需要摧毁地图,以便下次打开地图时再次载入地图,但似乎无法解决问题。Android谷歌地图在第二次加载时崩溃
目前我有什么低于 XML布局:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map">
</RelativeLayout>
</RelativeLayout>
然后在我的主要的代码我有:
public class ParkMap extends FragmentActivity implements GoogleMap.OnMarkerClickListener{
private GoogleMap mMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_park_map);
setUpMapIfNeeded();
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.setMyLocationEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.setMyLocationEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
}
public void setUpMapIfNeeded() {
try {
//SupportMapFragment mMapFragment;
mMapFragment = SupportMapFragment.newInstance();
FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.map, mMapFragment);
fragmentTransaction.commit();
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
//mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
//.getMap();
mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
// Do a null check to confirm that we have not already instantiated the map.
if (mMap != null) {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
}
}catch (Exception e) {
e.printStackTrace();
}
}
的上摧毁的东西我想从什么其他的职位,以实现我已阅读,但它不起作用。在旋转屏幕时它也会崩溃,因此我相信这只是它没有捕捉到的变化。
谢谢。
的logcat:
04-08 15:36:20.043 13303-13303/com.zoome.zoomeapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.zoome.zoomeapp, PID: 13303
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.zoome.zoomeapp/com.zoome.zoomeapp.ParkMap}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.zoome.zoomeapp.ParkMap.onCreate(ParkMap.java:98)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
帖子堆栈跟踪 –
我如何从运行的应用程序获取它,因为它只发生在我将apk上传到手机而不是在android studio的调试中运行时,因为桌面无法识别要插入的设备 – Navvy