j'ai un pb au niveau de la conversion en date d'une variable (var) que je récupére de la bdd (sqlite)
voila le code de mon activité
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package com.example.mobilebanque;



import java.sql.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class RechercherTransactions extends Activity {
	Calendar c;
	
	TextView essai;
	String dat;
	java.util.Date d1;
	java.util.Date d2;
	java.util.Date d3;
	long dd1;
	long dd2;
	long dd3;
	
	String agec_de_historique; 
	public final static String AGECONS="bb";
	  public final  static String AGEC="a";
	
	private EditText editFromDate,editToDate,cpte1;
	private int fromDay, fromMonth, fromYear;
	private int toDay, toMonth, toYear;
	private final int FROM_DATE_DIALOG = 1;
	private final int TO_DATE_DIALOG = 2;
     String chaine1;
     String chaine2;
     String chaine3;
     
     Database clientbBdd = new Database(this);
     
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.recherchertransactions);
		
		editFromDate = (EditText) this.findViewById(R.id.editFromDate);
		editToDate = (EditText) this.findViewById(R.id.editToDate);
		
		cpte1 = (EditText) this.findViewById(R.id.cpte1);
		
		Intent i = getIntent();
		  
	     agec_de_historique= i.getStringExtra(Connexion.AGEC);
			
	     essai = (TextView)findViewById(R.id.essai);
		    essai.setText(agec_de_historique);
	     
		
		
		
		
		 // get the current date
        c = Calendar.getInstance();
        fromYear = toYear = c.get(Calendar.YEAR);
        fromMonth  = toMonth = c.get(Calendar.MONTH);
        toDay = c.get(Calendar.DAY_OF_MONTH);
        
        fromDay  = 1;  // from is set to 1st of the current month 
   
       updateToDateDisplay();
       updateFromDateDisplay();
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		return Utils.inflateMenu(this,menu);
	}
	
	@Override 
	public boolean onOptionsItemSelected(MenuItem item) {
		return  Utils.handleMenuOption(this,item);
	}
	
	
	private DatePickerDialog.OnDateSetListener fromDateSetListener =
            new DatePickerDialog.OnDateSetListener() {
                public void onDateSet(DatePicker view, int pYear,int pMonth, int pDay) {
                    fromYear = pYear;
                    fromMonth = pMonth;
                    fromDay = pDay;
                    updateFromDateDisplay();
                }
            };
          
   	private DatePickerDialog.OnDateSetListener toDateSetListener =
                    new DatePickerDialog.OnDateSetListener() {
                        public void onDateSet(DatePicker view, int pYear,int pMonth, int pDay) {
                            toYear = pYear;
                            toMonth = pMonth;
                            toDay = pDay;
                            updateToDateDisplay();
                        }
                    };

	public void showFromDateDialog(View v) {
		  showDialog(FROM_DATE_DIALOG);
	}
	
	public void showToDateDialog(View v) {
		  showDialog(TO_DATE_DIALOG);
	}
	
	@Override
	protected Dialog onCreateDialog(int id) {
	    switch (id) {
	    case FROM_DATE_DIALOG:
	        return new DatePickerDialog(this,
	                    fromDateSetListener, fromYear, fromMonth, fromDay);
	    case TO_DATE_DIALOG:
	        return new DatePickerDialog(this,
	                    toDateSetListener, toYear, toMonth, toDay);
	    }
	    return null;
	}
	
	private void updateToDateDisplay() {
            // Month is 0 based so add 1
	        editToDate.setText( String.format("%d-%d-%d",toYear,toMonth + 1,toDay));
	}
	private void updateFromDateDisplay() {
        // Month is 0 based so add 1
        editFromDate.setText( String.format("%d-%d-%d",fromYear,fromMonth + 1,fromDay));
}
	 
	public void searchTransactions(View v) {
		 Database dbUser = new Database(RechercherTransactions.this);
			dbUser.open();
		
		 chaine1 = cpte1.getText().toString();
		 chaine2 = editFromDate.getText().toString();//date de deut
		 chaine3 = editToDate.getText().toString();//date de fin
		
				
		
			  
	   	   
			
		
		
		  
	  
		 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		
		 String kk=format.format(c.getTime());

		  if(chaine1.length() > 0 && chaine2.length() > 0 && chaine3.length() > 0)
				{
			  dat = dbUser.recuperer_date_trans(chaine1);//je recupere la date de la bdd
			  dbUser.close();
				 try {
					 d1=format.parse(chaine2);//convresion au format date de la 1ere date
					  d2=format.parse(chaine3);//convresion au format date de la 2ere date
					  d3 = format.parse(dat);//convresion au format date de la date recupérée de labdd
				} catch (ParseException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
				

				
	    	   
	    		
		    	 //conversion en secondes des dates
	    	 
				   dd1=d1.getTime();//fromdate
				  dd2=d2.getTime();//todate
				  dd3= d3.getTime();//date de la bdd
				  
					if(dd2>=dd1)
					{
						
						dbUser.open();
  			
						
  			 
  			 
  			
						
					
						if(dbUser.Auth_compte(chaine1) ) 
					      {	
							
					    
					    	
							
							if( dd2>=dd3 )
							{
							 
						if( dbUser.transfert( agec_de_historique,chaine1)==true)
							
						{
  	    	   Intent secondeActivitee=new Intent(RechercherTransactions.this, ListeTransactions.class);
  	  	 
  	    	 secondeActivitee.putExtra("fromdate", chaine2);
  	    	secondeActivitee.putExtra("todate", chaine3);
  	    	secondeActivitee.putExtra("numcpte1", chaine1);
  	
			     startActivity(secondeActivitee);
			    dbUser.close();
							}
						else Toast.makeText(RechercherTransactions.this,"Ce numero de compte n'est pas le votre", Toast.LENGTH_LONG).show();
						
							
						
				}
								
								
									else Toast.makeText(RechercherTransactions.this,"aucune trans", Toast.LENGTH_LONG).show();
							
						}
					else
						Toast.makeText(RechercherTransactions.this,"Ce numero de compte n'existe pas", Toast.LENGTH_LONG).show();
					
					
					}else Toast.makeText(RechercherTransactions.this,"la premiére date doit être  inferieure à la deuxieme", Toast.LENGTH_LONG).show();	
					
  			} else 
						Toast.makeText(RechercherTransactions.this,"Veuillez remplir tous les champs", Toast.LENGTH_LONG).show();
					
  	    
				
	
			
	
	


}
;


    
			                    
			              
	
	
	
	public void clearFields(View v) {
		
           editFromDate.setText("");
           editToDate.setText("");
           cpte1.setText("");
       
	} 
	
	
	 public void listAccountTransactions(View v) {
	    	Intent intent = new Intent(this,DetailsTransactions.class);
	    	intent.putExtra("accountid", chaine1);
	    	startActivity(intent);
		}

}
j ai une erreur
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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05-13 11:55:13.000: E/AndroidRuntime(23919): java.lang.IllegalStateException: Could not execute method of the activity
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.view.View$1.onClick(View.java:2072)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.view.View.performClick(View.java:2408)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.view.View$PerformClick.run(View.java:8816)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.os.Handler.handleCallback(Handler.java:587)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.os.Handler.dispatchMessage(Handler.java:92)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.os.Looper.loop(Looper.java:123)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.app.ActivityThread.main(ActivityThread.java:4627)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at java.lang.reflect.Method.invokeNative(Native Method)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at java.lang.reflect.Method.invoke(Method.java:521)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at dalvik.system.NativeStart.main(Native Method)
05-13 11:55:13.000: E/AndroidRuntime(23919): Caused by: java.lang.reflect.InvocationTargetException
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at com.example.mobilebanque.RechercherTransactions.searchTransactions(RechercherTransactions.java:187)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at java.lang.reflect.Method.invokeNative(Native Method)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at java.lang.reflect.Method.invoke(Method.java:521)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at android.view.View$1.onClick(View.java:2067)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	... 11 more
05-13 11:55:13.000: E/AndroidRuntime(23919): Caused by: java.lang.NullPointerException
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at java.text.SimpleDateFormat.parse(SimpleDateFormat.java:1201)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	at java.text.DateFormat.parse(DateFormat.java:642)
05-13 11:55:13.000: E/AndroidRuntime(23919): 	... 15 more
cette erreur intervient qd je saisi un numero qi nest pas au client,donc là ou il est sensé m'executer :if( dbUser.transfert( agec_de_historique,chaine1)==true) et mafficher nest pas le votre
dnc je ne sais pas ou est l'erreur au niveau de la conversion???