当设备旋转时，片段没有加载横向布局，回复到之前的片段

Question

我遇到了一个不调用其自身的横向布局的片段的问题。当你旋转设备，它将恢复到以前的片段，并把该进的logcat：

细目：

我在片段A，按下一个按钮和我带到片段B.当我旋转设备，片段A以横向视图显示。

requestLayout（）被android.widget.ListView错误地调用{43a67d00 VFED.VC. ...... ID 0,0-720,1845}布局过程：在运行的第二布局传递

E/ViewRootImpl：sendUserActionEvent（）MVIEW == NULL

如果该设备已经被旋转然后选择片段，横向布局加载得很好，就在您处于片段本身中时。

这里是片段的代码，我希望你能帮助！

public class nandos_Fragment extends Fragment implements View.OnClickListener { 
    View rootview; 
    MapView mMapView; 
    private GoogleMap googleMap; 
    public static Button scanBtn; 
    public static int retrievedResult = 0; 
    private static final String TAG = "MyActivity"; 
    @Nullable 
    @Override 

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

    rootview = inflater.inflate(R.layout.nandos_layout, container, false); 
    scanBtn = (Button) rootview.findViewById(R.id.scan_button); 
    scanBtn.setOnClickListener(this); 
    mMapView = (MapView) rootview.findViewById(R.id.mapView); 
    mMapView.onCreate(savedInstanceState); 
    mMapView.onResume();// needed to get the map to display immediately 
    try { 
     MapsInitializer.initialize(getActivity().getApplicationContext()); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
    googleMap = mMapView.getMap(); 
    // latitude and longitude 
    double latitude = 52.955491; 
    double longitude = -1.149885; 

    // create marker 
    MarkerOptions marker = new MarkerOptions().position(
      new LatLng(latitude, longitude)).title("Nandos Nottingham!"); 

    // Changing marker icon 
    marker.icon(BitmapDescriptorFactory 
      .defaultMarker(BitmapDescriptorFactory.HUE_ROSE)); 

    // adding marker 
    googleMap.addMarker(marker); 
    CameraPosition cameraPosition = new CameraPosition.Builder() 
      .target(new LatLng(52.955491, -1.149885)).zoom(15).build(); 
    googleMap.animateCamera(CameraUpdateFactory 
      .newCameraPosition(cameraPosition)); 
    return rootview; 
} 

public void onClick(View v) { 
    //respond to clicks 
    if (v.getId() == R.id.scan_button) { 
     //scan 
     if (retrievedResult == 0) { 
      IntentIntegrator scanIntegrator = new IntentIntegrator(getActivity()); 
      scanIntegrator.initiateScan(); 
     }else{} 

    } 
} 
@Override 
public void onResume() { 
    super.onResume(); 
    mMapView.onResume(); 
    Random r = new Random(); 
    int i1 = r.nextInt(80 - 65) + 65; 
    if (result != null) { 
     scanBtn.setText("Code: " + result + i1); 
     retrievedResult = 1; 
    } 

} 

@Override 
public void onPause() { 
    super.onPause(); 
    mMapView.onPause(); 
    scanBtn.setText("Get Offer!"); 
    retrievedResult = 0; 
    result = null; 
} 

@Override 
public void onDestroy() { 
    Log.v(TAG, "ON DESTROY"); 
    mMapView.onDestroy(); 
    super.onDestroy(); 
} 

清单文件：

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.example.user.ntuio" > 
<uses-permission android:name="android.permission.INTERNET"/> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 
<uses-permission android:name="com.ram.googlemapsv2.permission.MAPS_RECEIVE" /> 
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /> 
<uses-permission android:name="android.permission.CALL_PHONE" /> 
<uses-feature 
    android:glEsVersion="0x00020000" 
    android:required="true"/> 
<application 
    android:allowBackup="true" 
    android:icon="@drawable/ntsu" 
    android:label="@string/app_name" 
    android:largeHeap="true" 
    android:theme="@style/AppTheme" > 
    <activity 
     android:name=".HomeActivity" 
     android:label="@string/title_activity_nav_bar"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <meta-data android:name="com.google.android.gms.version" 
     android:value="@integer/google_play_services_version" /> 
    <meta-data 
     android:name="com.google.android.maps.v2.API_KEY" 
     android:value="****"/> 

</application> 

</manifest> 

Answer 1

添加
android:configChanges="keyboardHidden|orientation|screenSize"
后
android:label="@string/title_activity_nav_bar"

这应该防止清爽旋转设备后。