Java 在片段选项卡内添加映射时出错
我创建了一个应用程序，其中三个片段选项卡中的第一个包含地图。现在只实现了第一个选项卡。您可以在存储库中找到整个应用程序： 该应用程序正在正常构建，在我将标签从1切换到3时可以正常工作。当我尝试从选项卡3返回到以前的选项卡时，会出现崩溃。我得到一个运行时异常：Java 在片段选项卡内添加映射时出错,java,android,xml,google-maps,android-fragments,Java,Android,Xml,Google Maps,Android Fragments,我创建了一个应用程序，其中三个片段选项卡中的第一个包含地图。现在只实现了第一个选项卡。您可以在存储库中找到整个应用程序： 该应用程序正在正常构建，在我将标签从1切换到3时可以正常工作。当我尝试从选项卡3返回到以前的选项卡时，会出现崩溃。我得到一个运行时异常： 03-04 20:27:53.809 29056-29056/com.example.lwach.earthquakeapp E/AndroidRuntime: FATAL EXCEPTION: main
03-04 20:27:53.809 29056-29056/com.example.lwach.earthquakeapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.lwach.earthquakeapp, PID: 29056
android.view.InflateException: Binary XML file line #1: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:770)
at android.view.LayoutInflater.inflate(LayoutInflater.java:483)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at com.example.lwach.earthquakeapp.MapFragment.onCreateView(MapFragment.java:24)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2189)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1299)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:752)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2355)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2146)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2098)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1979)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:626)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1268)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:668)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:630)
at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:611)
at android.support.design.widget.TabLayout$ViewPagerOnTabSelectedListener.onTabSelected(TabLayout.java:2178)
at android.support.design.widget.TabLayout.dispatchTabSelected(TabLayout.java:1155)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1148)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1118)
at android.support.design.widget.TabLayout$Tab.select(TabLayout.java:1413)
at android.support.design.widget.TabLayout$TabView.performClick(TabLayout.java:1523)
at android.view.View$PerformClick.run(View.java:20926)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5951)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
Caused by: java.lang.IllegalArgumentException: Binary XML file line #1: Duplicate id 0x7f1000c0, tag null, or parent id 0x7f1000bf with another fragment for com.google.android.gms.maps.SupportMapFragment
at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:3420)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:47)
at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:178)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:732)
at android.view.LayoutInflater.inflate(LayoutInflater.java:483)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at com.example.lwach.earthquakeapp.MapFragment.onCreateView(MapFragment.java:24)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2189)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1299)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:752)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2355)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2146)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2098)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1979)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:626)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1268)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:668)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:630)
at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:611)
at android.support.design.widget.TabLayout$ViewPagerOnTabSelectedListener.onTabSelected(TabLayout.java:2178)
at android.support.design.widget.TabLayout.dispatchTabSelected(TabLayout.java:1155)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1148)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1118)
at android.support.design.widget.TabLayout$Tab.select(TabLayout.java:1413)
at android.support.design.widget.TabLayout$TabView.performClick(TabLayout.java:1523)
at android.view.View$PerformClick.run(View.java:20926)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5951)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
android.view.InflateException: Binary XML file line #1: Error inflating class fragment com.example.lwach.earthquakeapp.MapFragment.onCreateView
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
public class MainActivity extends AppCompatActivity {
private TabLayout tabLayout;
private ViewPager viewPager;
private Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
viewPager = (ViewPager) findViewById(R.id.view_pager);
viewPager.setAdapter(new PagerAdapter(this, getSupportFragmentManager()));
tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.setupWithViewPager(viewPager);
}
}
public class PagerAdapter extends FragmentPagerAdapter {
private Context context;
public PagerAdapter(Context context, FragmentManager fm) {
super(fm);
this.context = context;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new MapFragment();
case 1:
return new ListFragment();
case 2:
return new GraphFragment();
}
return null;
}
@Override
public int getCount() {
return 3;
}
@Override
public CharSequence getPageTitle(int position) {
switch(position){
case 0:
return context.getString(R.string.action_map);
case 1:
return context.getString(R.string.action_list);
case 2:
return context.getString(R.string.action_graph);
}
return null;
}
}
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapFragment extends Fragment implements OnMapReadyCallback {
private GoogleMap mMap;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_map, container, false);
SupportMapFragment mapFragment = (SupportMapFragment) this.getChildFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
return view;
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
}
这很可能是由于使用了嵌套在ViewPager中使用的片段中的SupportMapFragment 最简单的解决方案是让ViewPager中使用的片段直接扩展SupportMapFragment。这消除了嵌套片段的使用。还请注意，此解决方案不需要扩展xml布局 将MapFragment替换为以下代码：
public class MapFragment extends SupportMapFragment implements OnMapReadyCallback {
private GoogleMap mMap;
@Override
public void onResume() {
super.onResume();
if (mMap == null) {
getMapAsync(this);
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
}
请显示整个stacktrace。请复制并粘贴它。不是每个人都用高分辨率显示器浏览这个网站。好的，我已经解决了。谢谢。希望你的问题能对遇到同样问题的人有所帮助。