Bonjour ,

Le logcat me renvoi comme erreur :"java.lang.NullPointerException",Et je ne sais pas pk?

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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package com.example.safwen.test;
 
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TabHost;
import android.widget.TextView;
import android.widget.Toast;
 
import java.util.ArrayList;
import java.util.List;
 
 
public class MainActivity extends Activity {
 
    private static final int EDIT =0, DELETE= 1;
 
 
    EditText nomTxt,prenomTxt,emailTxt,codeTxt,soldeTxt;
    List<Compte> Comptes = new ArrayList<Compte>();
    ListView compteListView;
    DatabaseHandler dbHandler;
    int longClickedItemIndex;
    ArrayAdapter<Compte> compteAdapter;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        nomTxt=(EditText)findViewById(R.id.editNom);
        prenomTxt=(EditText)findViewById(R.id.editPrenom);
        emailTxt=(EditText)findViewById(R.id.editEmail);
        codeTxt=(EditText)findViewById(R.id.editCode);
        soldeTxt=(EditText)findViewById(R.id.editSolde);
        TabHost tabHost =(TabHost)findViewById(R.id.tabHost);
        final Button addBtn = (Button)findViewById(R.id.btnAjout);
        compteListView=(ListView)findViewById(R.id.listView);
        dbHandler = new DatabaseHandler(getApplicationContext());
 
        registerForContextMenu(compteListView);
        compteListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                longClickedItemIndex = position;
            }
        });
 
 
        addBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Compte compte = new Compte(dbHandler.getComptesCount(),String.valueOf(nomTxt.getText()),String.valueOf(prenomTxt.getText()),
                        String.valueOf(emailTxt.getText()),String.valueOf(codeTxt.getText()),String.valueOf(soldeTxt.getText()));
                if (!compteExists(compte)) {
                    dbHandler.createCompte(compte);
                    Comptes.add(compte);
                    compteAdapter.notifyDataSetChanged();
                    Toast.makeText(getApplicationContext(), String.valueOf(codeTxt.getText()) + " a été crée avec succes,", Toast.LENGTH_SHORT).show();
                        return;
                }
                Toast.makeText(getApplicationContext(), String.valueOf(codeTxt.getText()) + " already exists,", Toast.LENGTH_SHORT).show();
 
            }
        });
 
        tabHost.setup();
 
        TabHost.TabSpec tabSpec = tabHost.newTabSpec("creator");
        tabSpec.setContent(R.id.Creator);
        tabSpec.setIndicator("Creator");
        tabHost.addTab(tabSpec);
 
        tabSpec = tabHost.newTabSpec("list");
        tabSpec.setContent(R.id.List);
        tabSpec.setIndicator("List");
        tabHost.addTab(tabSpec);
 
        nomTxt.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 
            }
 
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
 
                addBtn.setEnabled(String.valueOf(nomTxt.getText()).trim().length()>0);
 
            }
 
            @Override
            public void afterTextChanged(Editable s) {
 
            }
        });
 
        if(dbHandler.getComptesCount() !=0)
        Comptes.addAll(dbHandler.getAllComptes());
 
            populateList();
  }
 
    public void onCreateContextMenu(ContextMenu menu,View view ,ContextMenu.ContextMenuInfo menuInfo){
 
        super.onCreateContextMenu(menu, view, menuInfo);
 
 
        menu.add(Menu.NONE , EDIT , menu.NONE ,"Edit Compte");
        menu.add(Menu.NONE , DELETE , menu.NONE ,"Delete Compte");
 
    }
 
    public boolean onContextItemSelected(MenuItem item){
 
        switch (item.getItemId()){
            case EDIT:
                break;
            case DELETE:
                dbHandler.deleteCompte(Comptes.get(longClickedItemIndex));
                Comptes.remove(longClickedItemIndex);
                compteAdapter.notifyDataSetChanged();
                break;
 
        }
        return super.onContextItemSelected(item);
    }
 
    private boolean compteExists(Compte compte){
 
        String code = compte.getCode();
        int compteCount = Comptes.size();
 
        for (int i = 0 ; i< compteCount ; i++){
            if(code.compareToIgnoreCase(Comptes.get(i).getCode()) == 0)
                return true;
        }
        return false;
    }
 
    private void populateList(){
 
        compteAdapter = new CompteListAdapter();
 
        compteListView.setAdapter(compteAdapter);
    }
 
    private void addComptes(String nom,String prenom,String email,String code,String solde){
 
        Comptes.add(new Compte(0,nom,prenom,email,code,solde));
  }
 
    private class CompteListAdapter extends ArrayAdapter<Compte>{
 
        public CompteListAdapter(){
 
 
        super(MainActivity.this ,R.layout.listview_item,R.id.editNom ,Comptes);
 
 
        }
    }
 
    public View getView(int position ,View view , ViewGroup parent){
 
        if (view==null)
            view=getLayoutInflater().inflate(R.layout.listview_item,parent,false);
 
        Compte currentCompte = Comptes.get(position);
 
        TextView nom = (TextView)view.findViewById(R.id.compteNom);
        nom.setText(currentCompte.getNom());
        TextView prenom = (TextView)view.findViewById(R.id.comptePrenom);
        prenom.setText(currentCompte.getPrenom());
        TextView email = (TextView)view.findViewById(R.id.compteEmail);
        email.setText(currentCompte.getEmail());
        TextView code = (TextView)view.findViewById(R.id.compteCode);
        code.setText(currentCompte.getCode());
        TextView solde = (TextView)view.findViewById(R.id.compteSolde);
        solde.setText(currentCompte.getSolde());
 
        return view;
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }
 
 
}

et voila le logcat :

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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 Process: com.example.safwen.test, PID: 12605
    java.lang.NullPointerException
            at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:394)
            at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
            at android.widget.AbsListView.obtainView(AbsListView.java:2351)
            at android.widget.ListView.measureHeightOfChildren(ListView.java:1274)
            at android.widget.ListView.onMeasure(ListView.java:1186)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2439)
            at android.view.View.measure(View.java:16749)
            at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2080)
            at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1176)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1380)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1063)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5993)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
            at android.view.Choreographer.doCallbacks(Choreographer.java:574)
            at android.view.Choreographer.doFrame(Choreographer.java:544)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5584)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
            at dalvik.system.NativeStart.main(Native Method)