我尝试启动一个可以刷卡的标签。它工作正常！但是，如果我尝试实施谷歌地图，那么它可以工作单位我切换选项卡并返回地图。我得到了这样的错误：
E/AndroidRuntime(25324): FATAL EXCEPTION: main
E/AndroidRuntime(25324): android.view.InflateException: Binary XML file line #21: Error inflating class fragment
我在谷歌搜索了很多次，但找不到解决方案。
这是MainActivity类代码：
public class MainActivity extends FragmentActivity implements ActionBar.TabListener {
AppSectionsPagerAdapter mAppSectionsPagerAdapter;
ViewPager mViewPager;
GoogleMapOptions nMap;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create the adapter that will return a fragment for each of the three primary sections
// of the app.
mAppSectionsPagerAdapter = new AppSectionsPagerAdapter(getSupportFragmentManager());
// Set up the action bar.
final ActionBar actionBar = getActionBar();
// Specify that the Home/Up button should not be enabled, since there is no hierarchical
// parent.
actionBar.setHomeButtonEnabled(false);
// Specify that we will be displaying tabs in the action bar.
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Set up the ViewPager, attaching the adapter and setting up a listener for when the
// user swipes between sections.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mAppSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// When swiping between different app sections, select the corresponding tab.
// We can also use ActionBar.Tab#select() to do this if we have a reference to the
// Tab.
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mAppSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by the adapter.
// Also specify this Activity object, which implements the TabListener interface, as the
// listener for when this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mAppSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
public static class AppSectionsPagerAdapter extends FragmentPagerAdapter {
public AppSectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int i) {
switch (i) {
case 0:
// The first section of the app is the most interesting -- it offers
// a launchpad into the other demonstrations in this example application.
Fragment f1 = new LayersDemoActivity2();
return f1;
default:
// The other sections of the app are dummy placeholders.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, i + 1);
fragment.setArguments(args);
return fragment;
}
}
@Override
public int getCount() {
return 4;
}
@Override
public CharSequence getPageTitle(int position) {
switch(position){
case 0: return "Timeline";
case 1: return "Chat";
case 2: return "Fh";
case 3: return "Mehr";
default: return "Section " + (position + 1);
}
}
}
/**
* A dummy fragment representing a section of the app, but that simply displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
public static final String ARG_SECTION_NUMBER = "section_number";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_section_dummy, container, false);
Bundle args = getArguments();
((TextView) rootView.findViewById(android.R.id.text1)).setText(
getString(R.string.dummy_section_text, args.getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
}
标签1调用此片段
public class LayersDemoActivity2 extends Fragment implements OnItemSelectedListener {
private GoogleMap mMap;
private CheckBox mTrafficCheckbox;
private CheckBox mMyLocationCheckbox;
//neu hinzugekommen
private LocationClient locationclient;
private String TAG = this.getClass().getSimpleName();
//neu hinzugekommen
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView = inflater.inflate(R.layout.layers_demo, container, false);
// Demonstration of a collection-browsing activity.
rootView.findViewById(R.id.traffic)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
updateTraffic();
}
});
// Demonstration of a collection-browsing activity.
rootView.findViewById(R.id.my_location)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
updateMyLocation();
}
});
// Demonstration of a collection-browsing activity.
rootView.findViewById(R.id.button1)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!checkReady()) {
return;
}
try{
LatLng hier = new LatLng(mMap.getMyLocation().getLatitude(), mMap.getMyLocation().getLongitude());
Marker setzen = mMap.addMarker(new MarkerOptions().position(hier).title("Here I am!"));
}catch(Exception e){
}
}
});
return rootView;
}
@Override
public void onStart() {
super.onStart();
Spinner spinner = (Spinner) getView().findViewById(R.id.layers_spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getView().getContext(), R.array.layers_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(this);
mTrafficCheckbox = (CheckBox) getView().findViewById(R.id.traffic);
mMyLocationCheckbox = (CheckBox) getView().findViewById(R.id.my_location);
setUpMapIfNeeded();
}
@Override
public void onResume() {
super.onResume();
setUpMapIfNeeded();
if (mMap != null) {
updateTraffic();
updateMyLocation();
}
}
private void setUpMapIfNeeded() {
if (mMap == null) {
mMap = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
}
}
private boolean checkReady() {
if (mMap == null) {
//getView().Toast.makeText(this, R.string.map_not_ready, Toast.LENGTH_SHORT).show();
return false;
}
return true;
}
private void updateTraffic() {
if (!checkReady()) {
return;
}
mMap.setTrafficEnabled(mTrafficCheckbox.isChecked());
}
private void updateMyLocation() {
if (!checkReady()) {
return;
}
mMap.setMyLocationEnabled(mMyLocationCheckbox.isChecked());
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
setLayer((String) parent.getItemAtPosition(position));
}
private void setLayer(String layerName) {
if (!checkReady()) {
return;
}
if (layerName.equals(getString(R.string.normal))) {
mMap.setMapType(MAP_TYPE_NORMAL);
} else if (layerName.equals(getString(R.string.hybrid))) {
mMap.setMapType(MAP_TYPE_HYBRID);
} else if (layerName.equals(getString(R.string.satellite))) {
mMap.setMapType(MAP_TYPE_SATELLITE);
} else if (layerName.equals(getString(R.string.terrain))) {
mMap.setMapType(MAP_TYPE_TERRAIN);
} else {
Log.i("LDA", "Error setting layer with name " + layerName);
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// Do nothing.
}
}
最后但并非最不重要的是，这是layers_demo.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
<!-- A set of test checkboxes. -->
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignTop="@id/map"
android:background="#D000"
android:orientation="vertical"
android:padding="6dp" >
<Spinner
android:id="@+id/layers_spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<CheckBox
android:id="@+id/traffic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onTrafficToggled"
android:text="@string/traffic" />
<CheckBox
android:id="@+id/my_location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onMyLocationToggled"
android:text="@string/my_location" />
</LinearLayout>
<Button
android:id="@+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:onClick="tagOnMyLocation"
android:text="@string/tag_me" />
和activity_main.xml布局
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
我想这与片段有关，但我不知道怎么做，我也不知道为什么。请帮忙。 ：（
答案 0 :(得分：1)
只需在oncreateview方法
之后粘贴此方法@Override
public void onDestroyView() {
Fragment f = (Fragment) getFragmentManager().findFragmentById(R.id.map);
if (f != null) {
getFragmentManager().beginTransaction().remove(f).commit();
}
super.onDestroyView();
}