ANdroid不显示自定义适配器

我工作的一个vtc应用程序，我需要在主屏幕上显示客户端的命令。我选择了使用适配器自定义列表视图的方式，但当我在屏幕上除了页面的标题之外启动应用程序。我分开了适配器代码和片段代码（是的，我在一个片段中工作），我想对您的代码有意见。这里的片段：ANdroid不显示自定义适配器

package com.cmn.cmnvtc; 

     import android.Manifest; 
    import android.app.Dialog; 
    import android.app.Fragment; 
    import android.content.Context; 
    import android.content.Intent; 
    import android.content.pm.PackageManager; 
    import android.location.Location; 
    import android.net.Uri; 
    import android.os.Build; 
    import android.os.Bundle; 
    import android.provider.Settings; 
    import android.support.annotation.NonNull; 
    import android.support.annotation.Nullable; 
    import android.support.design.widget.Snackbar; 
    import android.support.v4.app.ActivityCompat; 
    import android.view.LayoutInflater; 
    import android.view.View; 
    import android.view.ViewGroup; 
    import android.widget.AdapterView; 
    import android.widget.ArrayAdapter; 
    import android.widget.Button; 
    import android.widget.LinearLayout; 
    import android.widget.ListView; 
    import android.widget.RelativeLayout; 
    import android.widget.TextView; 
    import android.widget.Toast; 

    import com.android.volley.RequestQueue; 
    import com.android.volley.Response; 
    import com.android.volley.toolbox.Volley; 
    import com.google.android.gms.common.ConnectionResult; 
    import com.google.android.gms.common.GoogleApiAvailability; 
    import com.google.android.gms.common.api.GoogleApiClient; 
    import com.google.android.gms.location.LocationListener; 
    import com.google.android.gms.location.LocationRequest; 
    import com.google.android.gms.location.LocationServices; 
    import com.google.android.gms.maps.CameraUpdate; 
    import com.google.android.gms.maps.CameraUpdateFactory; 
    import com.google.android.gms.maps.GoogleMap; 
    import com.google.android.gms.maps.MapFragment; 
    import com.google.android.gms.maps.OnMapReadyCallback; 
    import com.google.android.gms.maps.model.LatLng; 
    import com.google.android.gms.maps.model.Marker; 
    import com.google.android.gms.maps.model.MarkerOptions; 

    import org.json.JSONException; 
    import org.json.JSONObject; 

    import java.util.ArrayList; 
    import java.util.List; 


    public class MainPageFragment1 extends Fragment implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener{ 

     private LinearLayout containerView; 
     private TextView NoCommand; 
     private UserLocalStore userLocalStore; 
     private List<Courses> coursesList; 
     private ListView lvCourses; 
     private CoursesAdapter coursesAdapter; 
     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
      View v = inflater.inflate(R.layout.fragment_main1, container, false); 
      userLocalStore = new UserLocalStore(getActivity()); 
      NoCommand = (TextView) v.findViewById(R.id.NoCommand); 
      lvCourses = (ListView) v.findViewById(R.id.lvCourses); 
      coursesList = new ArrayList<>(); 
      final Response.Listener<String> responseListener = new Response.Listener<String>(){ 


       @Override 
       public void onResponse(String response) { 
        try { 
         JSONObject jsonObject = new JSONObject(response); 
         boolean success = jsonObject.getBoolean("success"); 
         if(success){ 
          int count = jsonObject.getInt("count"); 

          for(int i=0; i<count; i++) { 

           JSONObject obj = jsonObject.getJSONObject(String.valueOf(i)); 
           String origin = obj.getString("origin"); 
           String destination = obj.getString("destination"); 
           String date_depart = obj.getString("date_depart"); 
           String heure_depart = obj.getString("heure_depart"); 
           int nb_passagers = Integer.parseInt(obj.getString("nb_passagers")); 
           float prix = Float.parseFloat(obj.getString("prix")); 
           String mode_paiement = obj.getString("paiement"); 
           String etat_paiement = obj.getString("course_payee"); 


           Courses course = new Courses(origin, destination, date_depart, heure_depart, nb_passagers, prix 
           , mode_paiement, etat_paiement); 
           coursesList.add(course); 
          } 

         }else{ 
          NoCommand.setEnabled(true); 
          NoCommand.setText("Oups... Vous n'avez commandé aucune course pour le moment."); 
         } 

        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 

       } 
      }; 
      User currentUser = userLocalStore.getLoggedInUser(); 
      final GetAllCourseRequest getAllCourse = new GetAllCourseRequest(currentUser.user_id,responseListener); 
      RequestQueue queue = Volley.newRequestQueue(getActivity()); 
      queue.add(getAllCourse); 

      coursesAdapter = new CoursesAdapter(getActivity(), coursesList); 
      lvCourses.setAdapter(coursesAdapter); 
      lvCourses.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
        Toast.makeText(getActivity(), "CLicked", Toast.LENGTH_SHORT).show(); 
       } 
      }); 


      if (googleServicesAvailable()) { 
       containerView = (LinearLayout) v.findViewById(R.id.containerView); 
       askForPermission(); 
      } 

      return v; 
     } 

     public boolean googleServicesAvailable() { 
      GoogleApiAvailability api = GoogleApiAvailability.getInstance(); 
      int isAvaibable = api.isGooglePlayServicesAvailable(getActivity()); 
      if (isAvaibable == ConnectionResult.SUCCESS) { 
       return true; 
      } else if (api.isUserResolvableError(isAvaibable)) { 
       Dialog dialog = api.getErrorDialog(getActivity(), isAvaibable, 0); 
       dialog.show(); 
      } else { 
       Toast.makeText(getActivity(), "Can't connect to play services", Toast.LENGTH_SHORT).show(); 
      } 
      return false; 
     } 

     private void explain() { 
      Snackbar.make(containerView, "Cette permission est nécessaire pour vous géolocalisez", Snackbar.LENGTH_LONG).setAction("Activer", new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 
        askForPermission(); 
       } 
      }).show(); 
     } 
     private void askForPermission() { 
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
       requestPermissions(new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION, android.Manifest.permission.ACCESS_COARSE_LOCATION}, 2); 
      } 
     } 
     @Override 
     public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { 
      if (requestCode == 2) { 
       if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
       } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
        if (shouldShowRequestPermissionRationale(permissions[0]) == false) { 
         displayOptions(); 
        } else { 
         explain(); 
        } 
       } 
       if (grantResults[1] == PackageManager.PERMISSION_GRANTED) { 
       } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
        if (shouldShowRequestPermissionRationale(permissions[1]) == false) { 
         displayOptions(); 
        } else { 
         explain(); 
        } 
       } 
      } 
      super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
     } 
     private void displayOptions() { 
      Snackbar.make(containerView, "Vous avez désactivé la permission", Snackbar.LENGTH_LONG).setAction("Paramètres", new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 
        final Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS); 
        final Uri uri = Uri.fromParts("package", getActivity().getPackageName(), null); 
        intent.setData(uri); 
        startActivity(intent); 
       } 
      }).show(); 
     } 

     @Override 
     public void onConnected(@Nullable Bundle bundle) { 

     } 

     @Override 
     public void onConnectionSuspended(int i) { 

     } 

     @Override 
     public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 

     } 
    }

我的自定义适配器：

package com.cmn.cmnvtc; 

import android.content.Context; 
import android.text.TextWatcher; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.ImageButton; 
import android.widget.TextView; 

import org.w3c.dom.Text; 

import java.util.List; 

/** 
* Created by Wild Shadow on 18/06/2017. 
*/ 
public class CoursesAdapter extends BaseAdapter { 

    private List<Courses> coursesList; 
    private Context ctx; 


    public CoursesAdapter(Context context, List<Courses> coursesList) { 
     this.ctx = context; 
     this.coursesList = coursesList; 
    } 

    @Override 
    public int getCount() { 
     return coursesList.size(); 
    } 

    @Override 
    public Object getItem(int position) { 
     return coursesList.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     View v = View.inflate(ctx, R.layout.row_courses, null); 
     TextView adrOrigin = (TextView) v.findViewById(R.id.adrOriginList); 
     TextView adrDestinaiton = (TextView) 
v.findViewById(R.id.adrDestList); 
     TextView dateDepart = (TextView) v.findViewById(R.id.dateDepList); 
     TextView heureDepart = (TextView) 
v.findViewById(R.id.heureDepList); 

     ImageButton viewDetails = (ImageButton) 
     v.findViewById(R.id.viewDetailsCourse); 

     adrOrigin.setText(coursesList.get(position).getOrigin()); 
     adrDestinaiton.setText(coursesList.get(position).getDestination()); 
     dateDepart.setText(coursesList.get(position).getDate_depart()); 
     heureDepart.setText(coursesList.get(position).getHeure_depart()); 

     return v; 
    } 
}

模型结构：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical" 
android:padding="6dp"> 

    <LinearLayout 
     android:orientation="vertical" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"> 

     <LinearLayout 
      android:orientation="horizontal" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="5dp"> 

      <ImageView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/ic_depart_courselist"/> 

      <TextView 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/adrOriginList" 
       android:textSize="17dp" 
       android:textColor="#000" 
       android:paddingTop="3dp" 
       android:text=" : Adresse de départ"/> 

     </LinearLayout> 

     <LinearLayout 
      android:orientation="horizontal" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content"> 

      <ImageView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/ic_destination_courselist"/> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:id="@+id/adrDestList" 
       android:paddingTop="3dp" 
       android:textColor="#000" 
       android:textSize="17dp" 
       android:text=" : Adresse d'arrivée" 
       android:layout_marginBottom="5dp"/> 

     </LinearLayout> 

     <LinearLayout 
      android:orientation="horizontal" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content"> 

      <ImageView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/ic_date_depart_courselist"/> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:id="@+id/dateDepList" 
       android:paddingTop="3dp" 
       android:textColor="#000" 
       android:textSize="17dp" 
       android:text=" : date de départ" 
       android:layout_marginBottom="3dp" 
       android:layout_marginRight="20dp"/> 

      <ImageView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/ic_heure_dep_courselist"/> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:id="@+id/heureDepList" 
       android:paddingTop="3dp" 
       android:textColor="#000" 
       android:textSize="17dp" 
       android:text=" : Heure" 
       android:layout_marginBottom="3dp"/> 

      <ImageButton 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/ic_details_courselist" 
       android:layout_marginLeft="65dp" 
       android:id="@+id/viewDetailsCourse" 
       android:paddingTop="5dp" 
       android:background="?android:selectableItemBackground"/> 

     </LinearLayout> 



    </LinearLayout> 
</LinearLayout>

和列表视图：

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingTop="10dp" 
    android:theme="@style/AppTheme" 
    tools:context="com.cmn.cmnvtc.MainPageFragment1"> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_gravity="center_horizontal"> 
     <TextView 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:textAlignment="center" 
      android:id="@+id/TitleListCommand" 
      android:textSize="25dp" 
      android:layout_marginBottom="15dp" 
      android:textColor="#727574" 
      android:text="Liste de mes courses "/> 

     <ListView 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_below="@+id/TitleListCommand" 
      android:layout_alignParentStart="true" 
      android:id="@+id/lvCourses"></ListView> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="200dp" 
      android:textColor="#969696" 
      android:layout_marginLeft="20dp" 
      android:layout_marginRight="20dp" 
      android:textSize="15dp" 
      android:textAlignment="center" 
      android:id="@+id/NoCommand" 
      android:text="" 
      android:enabled="false"/> 


    </RelativeLayout> 


</ScrollView>

我希望你能帮忙我去f指出错误，如果您想要更多，请尝试向我解释如何优化我的代码。 TY

来源

2017-06-18 Shadow956

填写清单后，您应该在ResponseListener中调用notifyDataSetChanged（）。

  @Override 
      public void onResponse(String response) { 
       try { 
        JSONObject jsonObject = new JSONObject(response); 
        boolean success = jsonObject.getBoolean("success"); 
        if(success){ 
         int count = jsonObject.getInt("count"); 

         for(int i=0; i<count; i++) { 
          ... 
          coursesList.add(course); 
         } 
         //notify adapter about change in data 
         coursesAdapter.notifyDataSetChanged(); 
        }else{ 
         NoCommand.setEnabled(true); 
         NoCommand.setText("Oups... Vous n'avez commandé aucune course pour le moment."); 
        } 

       } catch (JSONException e) { 
        e.printStackTrace(); 
       } 

      } 
     };

来源

2017-06-18 18:56:13

我发现我的错误。我只是把lvcourses.setAdapter（）放在最坏的地方。我必须将它放入循环中的ResponseListener中 – Shadow956

ANdroid不显示自定义适配器

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