Comment puis-je étendre SupportMapFragment dans Android Studio?

Je souhaite créer un fragment de carte personnalisé disposant de mes paramètres de zoom, de marqueur et de type de carte, afin de pouvoir le réutiliser dans plusieurs activités. La classe que j'ai créée s'appelle "LiteMap".Comment puis-je étendre SupportMapFragment dans Android Studio?

Je reçois une erreur du compilateur 'Incompatible Types' 'Required: com.mypackage.LiteMap' 'Found com.google.android.gms.maps.SupportMapFragment' où j'appelle .newInstance. Je suppose que .newInstance retourne la classe parente au lieu de ma classe mais je ne suis pas sûr de savoir comment remplacer dans ma classe pour retourner mon objet "LiteMap". Comme alternative, j'ai essayé d'instancier mon objet carte en utilisant new et j'obtiens l'erreur suivante sans ligne spécifique comme source mais il semble que l'utilisation de new ne crée pas l'objet LiteMap. Est ce que je veux faire une manière impossible ou stupide de le faire?

03-29 20:36:52.771 11326-11326/com.tremulant.phield E/AndroidRuntime: FATAL EXCEPTION: main 
    Process: com.tremulant.phield, PID: 11326 
    java.lang.RuntimeException: Unable to resume activity {com.tremulant.phield/com.tremulant.phield.ReviewDetails}: java.lang.NullPointerException: Attempt to invoke interface method 'void maps.ei.bz.o()' on a null object reference 
     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2974) 
     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3005) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2371) 
     at android.app.ActivityThread.access$800(ActivityThread.java:149) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5290) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703) 
    Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'void maps.ei.bz.o()' on a null object reference 
     at maps.ei.n.b(Unknown Source) 
     at com.google.android.gms.maps.internal.i$a.onTransact(:com.google.android.gms.alldynamite:115) 
     at android.os.Binder.transact(Binder.java:380) 
     at com.google.android.gms.maps.internal.IMapFragmentDelegate$zza$zza.onResume(Unknown Source) 
     at com.google.android.gms.maps.SupportMapFragment$zza.onResume(Unknown Source) 
     at com.google.android.gms.dynamic.zza$7.zzb(Unknown Source) 
     at com.google.android.gms.dynamic.zza.zza(Unknown Source) 
     at com.google.android.gms.dynamic.zza.onResume(Unknown Source) 
     at com.google.android.gms.maps.SupportMapFragment.onResume(Unknown Source) 
     at android.support.v4.app.Fragment.performResume(Fragment.java:2020) 
     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1107) 
     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252) 
     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1234) 
     at android.support.v4.app.FragmentManagerImpl.dispatchResume(FragmentManager.java:2056) 
     at android.support.v4.app.FragmentController.dispatchResume(FragmentController.java:196) 
     at android.support.v4.app.FragmentActivity.onResumeFragments(FragmentActivity.java:505) 
     at android.support.v4.app.FragmentActivity.onPostResume(FragmentActivity.java:494) 
     at android.support.v7.app.AppCompatActivity.onPostResume(AppCompatActivity.java:174) 
     at android.app.Activity.performResume(Activity.java:6119) 
     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2963) 
     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3005)  
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2371)  
     at android.app.ActivityThread.access$800(ActivityThread.java:149)  
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284)  
     at android.os.Handler.dispatchMessage(Handler.java:102)  
     at android.os.Looper.loop(Looper.java:135)  
     at android.app.ActivityThread.main(ActivityThread.java:5290)  
     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:908)  
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)  
03-29 20:36:52.822 11326-11326/? I/Process: Sending signal. PID: 11326 SIG: 9

LiteMap Fragment

package com.tremulant.phield; 

import android.os.Bundle; 
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 LiteMap extends SupportMapFragment implements OnMapReadyCallback { 
    private GoogleMap mMap; 

    String lat; 
    String lng; 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     //super.onCreate(savedInstanceState); 
     lat = getArguments().getString("Lat"); 
     lng = getArguments().getString("Lng"); 
     return inflater.inflate(R.layout.maplite,null); 

    } 

    @Override 
    public void onMapReady(GoogleMap googleMap) { 
     mMap = googleMap; 

     LatLng mapVenue = new LatLng(Double.parseDouble(lat), Double.parseDouble(lng)); 
     mMap.addMarker(new MarkerOptions().position(mapVenue)); 
     mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(mapVenue, 14.0f)); 
    } 
}

fichier de mise en page de maplite.xml pour le fragment

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
      android:orientation="vertical" 
      android:layout_width="25dp" 
      android:layout_height="fill_parent" 
      android:weightSum="10"> 


<fragment 
    android:id="@+id/lmap" 
    android:layout_width="match_parent" 
    android:layout_height="25dp" 
    class="com.tremulant.phield.LiteMap" /> 

</LinearLayout> 



    package com.tremulant.phield; 

import android.content.Intent; 
import android.graphics.Typeface; 
import android.os.Bundle; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 

public class ReviewDetails extends BaseActivity implements View.OnClickListener{ 

private Venue mVenue; 
@Override 
public void onClick(View v) { 
    Intent mapIntent = new Intent(ReviewDetails.this, VenueMap.class); 
    mapIntent.putExtra(VENUE_TRANSFER,mVenue); 
    startActivity(mapIntent); 
} 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_review_details); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

    getSupportActionBar().setDisplayHomeAsUpEnabled(true); 

    Intent intent = getIntent(); 
    mVenue = (Venue) intent.getSerializableExtra(VENUE_TRANSFER); 

    LiteMap liteMap = new LiteMap(); 
    //lmap.setArguments(args); 
    android.support.v4.app.FragmentTransaction fragmentTransaction = 
      getSupportFragmentManager().beginTransaction(); 
    fragmentTransaction.add(R.id.map_container, liteMap); 
    fragmentTransaction.commit(); 
    } 
}

fichier de mise en page de content_review_details.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
app:layout_behavior="@string/appbar_scrolling_view_behavior" 
tools:context="com.tremulant.phield.ReviewDetails" 
tools:showIn="@layout/activity_review_details"> 

<FrameLayout 
    android:id="@+id/map_container" 
    android:layout_below="@id/map" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 
    </FrameLayout> 

</RelativeLayout>

J'ai simplifié mon code. Aussi je ne comprends pas pourquoi quand je colle mon code ici, il ne se met pas correctement en retrait. Pouah! Maintenant, mon logcat montre ce qui suit dans une boucle. L'écran reste noir lorsque l'activité ReviewDetails essaie de se charger.

03-30 20:58:28.364 17076-17076/com.tremulant.phield I/ViewRootImpl: 

ViewRoot's Touch Event : ACTION_DOWN 
03-30 20:58:28.466 17076-17076/com.tremulant.phield I/ViewRootImpl: ViewRoot's Touch Event : ACTION_UP 
03-30 20:58:28.503 17076-17076/com.tremulant.phield I/Timeline: Timeline: Activity_launch_request id:com.tremulant.phield time:25955914 
03-30 20:58:28.552 17076-17076/com.tremulant.phield I/Timeline: Timeline: Activity_launch_request id:com.tremulant.phield time:25955964 
03-30 20:58:28.600 17076-17076/com.tremulant.phield D/ContextHelper: convertTheme. context->name=com.tremulant.phield themeResourceId=2131427455 
03-30 20:58:28.604 17076-17076/com.tremulant.phield D/ContextHelper: convertTheme. context->name=com.tremulant.phield themeResourceId=2131427455 
03-30 20:58:28.606 17076-17076/com.tremulant.phield I/PhoneWindow: [generateLayout] setColorNavigationBar => color=0x ff00796b 
03-30 20:58:28.753 17076-17076/com.tremulant.phield I/zzad: Making Creator dynamically 
03-30 20:58:28.763 17076-17076/com.tremulant.phield W/ResourcesManager: Asset path '/system/framework/com.android.media.remotedisplay.jar' does not exist or contains no resources. 
03-30 20:58:28.763 17076-17076/com.tremulant.phield W/ResourcesManager: Asset path '/system/framework/com.android.location.provider.jar' does not exist or contains no resources. 
03-30 20:58:28.839 17076-17076/com.tremulant.phield D/ChimeraCfgMgr: Reading stored module config 
03-30 20:58:28.878 17076-17076/com.tremulant.phield D/ChimeraFileApk: Primary ABI of requesting process is armeabi-v7a 
03-30 20:58:28.879 17076-17076/com.tremulant.phield I/art: DexFile_isDexOptNeeded failed to open oat file '/data/dalvik-cache/arm/[email protected]@[email protected][email protected]@[email protected]@classes.dex' for file location '/data/data/com.google.android.gms/app_chimera/m/00000000/DynamiteModules-prod.apk': Failed to open oat filename for reading: No such file or directory 
03-30 20:58:28.880 17076-17076/com.tremulant.phield D/ChimeraFileApk: Classloading successful. Optimized code found. 
03-30 20:58:29.044 17076-17076/com.tremulant.phield I/Google Maps Android API: Google Play services client version: 8487000 
03-30 20:58:29.055 17076-17076/com.tremulant.phield I/Google Maps Android API: Google Play services package version: 8703230 
03-30 20:58:29.331 17076-17076/com.tremulant.phield I/Google Maps Android API: Google Play services package version: 8703230 
03-30 20:58:29.339 17076-17076/com.tremulant.phield I/Google Maps Android API: Google Play services package version: 8703230 
03-30 20:58:29.344 17076-17076/com.tremulant.phield I/Google Maps Android API: Google Play services package version: 8703230 
03-30 20:58:29.352 17076-17076/com.tremulant.phield I/Google Maps Android API: Google Play services package version: 8703230 
03-30 20:58:29.361 17076-17076/com.tremulant.phield I/Google Maps Android API: Google Play services package version: 8703230

Source

2016-03-30 Joe Williamson

Si vous avez besoin de la réponse:

Changer votre maplite.xml à:

<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:map="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="25dp"> 

    <fragment 
     android:id="@+id/map" 
     android:name="com.google.android.gms.maps.SupportMapFragment" 
     class="com.google.android.gms.maps.SupportMapFragment" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 

</RelativeLayout>

Extend android.support.v4.app.Fragment au lieu de SupportMapFragment dans votre fragment LiteMap.

Après votre onCreateView dans MapLite fragment mis:

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

    SupportMapFragment smf = ((SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map)); 

    smf.getMapAsync(this); 
}

Source

2016-09-06 12:53:36

Hey merci homme pour cela. J'essayais d'accéder à childFragmentManager dans onCreate() et la map revenait null. J'ai donc essayé de sous-classer et ai obtenu une trace de pile obfuscated profondément dans gmaps. –

Ne répond pas à la question d'origine comment étendre SupportMapFragment. – Alpha

Comment puis-je étendre SupportMapFragment dans Android Studio?

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