android - 另一个 fragment 内的映射 fragment 导致 Activity 崩溃

Question

我正在使用选项卡式 Activity ，在第一个 fragment 中我正在使用 map fragment 。它工作正常，但问题是如果我在此 Activity 中的其他 fragment 之间切换，整个 Activity 会崩溃。删除 map fragment 后，代码运行良好。但我想在 fragment 中放置一张 map ，所以请帮忙。这是我的 map fragment 的 xml 代码

     <fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="350dp"
    android:layout_height="200dp"
    android:layout_marginTop="20dp"
    android:id="@+id/map"
    android:layout_below="@+id/textView6"
    android:layout_alignParentLeft="true"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_alignParentStart="true"
    android:layout_marginLeft="19dp"
    android:layout_marginStart="19dp" 

这是每次 Activity 崩溃前的错误-

    Process: com.gjs.finalproject, PID: 5571
                                             android.view.InflateException: Binary XML file line #30: Error inflating class fragment
                                                 at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:767)
                                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:810)
                                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
                                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
                                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:508)
                                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:418)
                                                 at com.gjs.finalproject.HomeFragment.About2Fragment.onCreateView(About2Fragment.java:64)
                                                 at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080)
                                                 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108)
                                                 at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1468)
                                                 at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:791)
                                                 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$3.run(ViewPager.java:275)
                                                 at android.view.Choreographer$CallbackRecord.run(Choreographer.java:775)
                                                 at android.view.Choreographer.doCallbacks(Choreographer.java:588)
                                                 at android.view.Choreographer.doFrame(Choreographer.java:557)
                                                 at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:761)
                                                 at android.os.Handler.handleCallback(Handler.java:739)
                                                 at android.os.Handler.dispatchMessage(Handler.java:95)
                                                 at android.os.Looper.loop(Looper.java:135)
                                                 at android.app.ActivityThread.main(ActivityThread.java:5276)
                                                 at java.lang.reflect.Method.invoke(Native Method)
                                                 at java.lang.reflect.Method.invoke(Method.java:372)
                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:911)
                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706)
                                              Caused by: java.lang.IllegalArgumentException: Binary XML file line #30: Duplicate id 0x7f0e009f, tag null, or parent id 0x7f0e009d with another fragment for com.google.android.gms.maps.SupportMapFragment
                                                 at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2422)
                                                 at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
                                                 at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:177)
                                                 at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:729)
                                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:810) 
                                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:813) 
                                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:813) 
                                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:508) 
                                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:418) 
                                                 at com.gjs.finalproject.HomeFragment.About2Fragment.onCreateView(About2Fragment.java:64) 
                                                 at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080) 
                                                 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108) 
                                                 at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1468) 
                                                 at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:791) 
                                                 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$3.run(ViewPager.java:275) 
                                                 at android.view.Choreographer$CallbackRecord.run(Choreographer.java:775) 
                                                 at android.view.Choreographer.doCallbacks(Choreographer.java:588) 
                                                 at android.view.Choreographer.doFrame(Choreographer.java:557) 
                                                 at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:761) 
                                                 at android.os.Handler.handleCallback(Handler.java:739) 
                                                 at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                 at android.os.Looper.loop(Looper.java:135) 
                                                 at android.app.ActivityThread.main(ActivityThread.java:5276) 
                                                 at java.lang.reflect.Method.invoke(Native Method) 
                                                 at java.lang.reflect.Method.invoke(Method.java:372) 
                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:911) 
                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706) 

这是我的 fragment 代码

   @Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
        mapFragment = ((SupportMapFragment) getChildFragmentManager()
                .findFragmentById(R.id.map));
      mapFragment.getMapAsync(this);
}


@Override
public void onDestroy() {
    super.onDestroy();
    if (mapFragment != null) {
        //mMap = null;
        mapFragment=null;
        }
    }

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    //Toast.makeText(getActivity(), lat + "   " + lng, Toast.LENGTH_LONG).show();

    LatLng locations = new LatLng(Util.reslatitude,Util.reslogitide);

    if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

        return;
    }
    mMap.setMyLocationEnabled(true);
    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(locations, 13));

    mMap.addMarker(new MarkerOptions()
            .title("abc")

            .position(locations));
}

提前致谢

Answer 1

与其在 onActivityCreated 中初始化您的 mapFragment，不如在 onCreateView 中初始化它

      @Override
      public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

          mapFragment = ((SupportMapFragment) getChildFragmentManager()
                    .findFragmentById(R.id.map));
          mapFragment.getMapAsync(this);
      }

你的onActivityCreated应该是

   @Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
}

添加以下代码，如果有效请告诉我

   @Override
   public void onPause() {
        super.onPause();

        getChildFragmentManager().beginTransaction()
                .remove(mapFragment)
                .commit();
    }