Débutant Android : problème dans la création d'application avec un BDD SQLite application

Bonjour à tous,

je suis nouveau sur le forum et débutant en programmation Androïde (avec ECLIPSE).

J'ai fais une appli avec 2 vues : dans la 1ere je crée la BDD dans la 2nde le la modifie. Jusque là tout va bien.

quand je quitte l'appli et que je reviens ensuite l'appli se plante !!!!

je vous joins les codes des 2 vues.

Merci à toutes les bonnes volontés.

*********************************************************
1ére vue
*********************************************************

Code:

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public class identite extends Activity {
 
	TextView nom=null;
	TextView tel=null;
	Button valider;
 
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.identite);
 
 
 
		valider = (Button)findViewById(R.id.valider);
		nom = (TextView)findViewById(R.id.nom);
		tel = (TextView)findViewById(R.id.tel);
 
		valider = (Button)findViewById(R.id.valider); 
		valider.setOnClickListener(validerListener);
 
		Toast t0 = Toast.makeText(identite.this,"saisissez vos Nom et n° de téléphone", Toast.LENGTH_SHORT);t0.show();
 
 
/////////////////////////////////////////////////création de la BDD////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
		DataBaseHelper myDbHelper = new DataBaseHelper(this);
		//myDbHelper = new DataBaseHelper(this);
 
		try {
		myDbHelper.createDataBase();
		//Toast t = Toast.makeText(identite.this,"chargement du questionnaire", Toast.LENGTH_SHORT);t.show();
		} catch (IOException ioe) {
		throw new Error("Unable to create database");
		}
 
		//try {
 
		//myDbHelper.openDataBase();
 
		//}catch(SQLException sqle){
 
		//throw sqle;
 
		//}	
 
		myDbHelper.close();
 
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
	questionBDD qtest=new questionBDD(this);		
 
	qtest.open();
	question questionFromBdd = qtest.getquestionWithid(1);
	//Toast t00 = Toast.makeText(identite.this,questionFromBdd.getId(), Toast.LENGTH_SHORT);t00.show();
	if (questionFromBdd.getnom().length()!=0){nom.setText(questionFromBdd.getnom());nom.setFocusable(false);nom.setClickable(false);nom.setLongClickable(false);}
	if (questionFromBdd.gettel().length()!=0){tel.setText(questionFromBdd.gettel());tel.setClickable(false);tel.setFocusable(false);tel.setLongClickable(false);}
	qtest.close();
 
 
 
	}
 
 
	private void maj(){
		questionBDD qtest=new questionBDD(this);
		qtest.open();
		question questionFromBdd = qtest.getquestionWithid(1);
	 	questionFromBdd.setnom(nom.getText().toString());
		questionFromBdd.settel(tel.getText().toString());
		qtest.updatenom(1, questionFromBdd);
		qtest.close();
	}
 
 
 
 
	 private OnClickListener validerListener = new OnClickListener() {
 
		 @Override
		    public void onClick(View v) {
 
 
 
			 if ((nom.getText().length()!=0) && (tel.getText().length()==10)){
 
				maj();
 
 
 
			Intent secondeActivite = new Intent(identite.this, MainActivity.class);
			startActivity(secondeActivite);						
			finish();
		    }
		 }
};
}

*********************************************************
2e vue
*********************************************************

Code:

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public class MainActivity extends Activity {
 
	TextView num_q, lib_q;
	ProgressBar count_q;
	CheckBox choix1, choix2, choix3, choix4;
	Button next, prev, valider;
 
	Integer nb=0,k,mem;
 
	//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
	//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
	int nbqmax=5; //définition du nombre total de questions contenues dans la base
	//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
	//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
 
	int vec[]= new int[nbqmax];
	int compteur=0;
	int cnt=0;
	String cu;
 
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
 
		num_q = (TextView)findViewById(R.id.num_question);
		count_q = (ProgressBar)findViewById(R.id.progressBar1);
		lib_q = (TextView)findViewById(R.id.lib_question);
		choix1 = (CheckBox)findViewById(R.id.choix1);
		choix2 = (CheckBox)findViewById(R.id.choix2);
		choix3 = (CheckBox)findViewById(R.id.choix3);
		choix4 = (CheckBox)findViewById(R.id.choix4);
		next = (Button)findViewById(R.id.next_btn);
		prev = (Button)findViewById(R.id.prev_btn);
		valider = (Button)findViewById(R.id.valider);
 
		String q1,lib_q1,choix1_q1,choix2_q1,choix3_q1,choix4_q1;
 
		Integer i=null;
 
		valider = (Button)findViewById(R.id.valider); 
		valider.setOnClickListener(validerListener);
 
		prev = (Button)findViewById(R.id.prev_btn); 
		prev.setOnClickListener(prevListener);
 
		next = (Button)findViewById(R.id.next_btn); 
		next.setOnClickListener(nextListener);
 
 
 
 
 
questionBDD qtest=new questionBDD(this);	
 
/////////////////////////////////////////////////////////////////initialiser le vecteur vec[]//////////////////////////////////////////////////
 
//////////////////////////////////////////////////////////////////////////////////////////qtest.open();
 
for (int j=1; j<=(nbqmax); j++) {
////////////////////////////////////////////////////////////////////////////////////////////1111111111111111111111111111111	
	qtest.open();//uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
	question questionFromBdd = qtest.getquestionWithid(j);
	if(questionFromBdd != null){
	vec[j-1]=questionFromBdd.getqnum();
	/////////////////////////////////////////////////////////////////////////////////////////////1111111111111111111111111111111
	}
qtest.close();
}
 
/////////////////////////////////////////////////////////////////////////////////////////////////////qtest.close();
 
while ((nb<=nbqmax-1) && (vec[nb]==0)){nb=nb+1;}
nb=nb+1;
 
/////////////////////////////////////////////////////////////////////////////////////////////////////////qtest.open();
qtest.open();
question questionFromBdd = qtest.getquestionWithid(nb);
 
if(nb==nbqmax+1){
 
	num_q.setText(" ");
	lib_q.setText("vous avez répondu à toutes les questions,"+"\n"+"\n                       MERCI !");
	choix1.setText(" ");
	choix2.setText(" ");
	choix3.setText(" ");
	choix4.setText(" ");
 
	choix1.setVisibility(255);
	choix2.setVisibility(255);
	choix3.setVisibility(255);
	choix4.setVisibility(255);
 
	valider.setClickable(false);
	next.setClickable(false);
	prev.setClickable(false);
 
}
else{
//Si la question est bien dans la base 
if(questionFromBdd != null){
 
	num_q.setText("QESTION N° "+questionFromBdd.getqnum());
	lib_q.setText(questionFromBdd.getqlib());
	choix1.setText(" "+questionFromBdd.getqc1());
	choix2.setText(" "+questionFromBdd.getqc2());
	choix3.setText(" "+questionFromBdd.getqc3());
	choix4.setText(" "+questionFromBdd.getqc4());
 
	if (questionFromBdd.getqc1().length() == 0){choix1.setVisibility(255);}else{choix1.setVisibility(0);}
	if (questionFromBdd.getqc2().length() == 0){choix2.setVisibility(255);}else{choix2.setVisibility(0);}
	if (questionFromBdd.getqc3().length() == 0){choix3.setVisibility(255);}else{choix3.setVisibility(0);}
	if (questionFromBdd.getqc4().length() == 0){choix4.setVisibility(255);}else{choix4.setVisibility(0);}
 
	}	
}
qtest.close();
 
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 
//Toast t0 = Toast.makeText(MainActivity.this,"vec[ j ]= "+vec[0]+" ; "+vec[1]+" ; "+vec[2]+" ; "+vec[3]+" ; "+vec[4]+" ", Toast.LENGTH_LONG);t0.show();
 
////////////////initalisation de la progressBar///////////////////////////
count_q.setMax(nbqmax);
cnt=0;compteur=0;
while (cnt<nbqmax){if (vec[cnt]==0){compteur=compteur+1;}cnt=cnt+1;}
count_q.setProgress(compteur);
//////////////////////////////////////////////////////////////////////////
 
	}
 
	//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	//++++++++++++++++++++++++++++++ exporter la base de donnée vers le dossier sdcard/tremplin/xxxxxxxx.jpg +++++++++++++++++++++++++
	private void sdcarde(){
 
		 questionBDD qtest=new questionBDD(this);
 
			 File directory=Environment.getExternalStorageDirectory();		
			 File f = new File(directory + "/tremplin");
			 if (!f.exists()) {
			   f.mkdir();
			 }
 
			 try {
			     File inputFile = new File("data/data/com.example.tremplin/databases/enquete.db");
 
 
 
 
 
			    qtest.open();
			 	question questionFromBdd = qtest.getquestionWithid(1);
			 	///////////////////////////////////////////////////////////////////////////////////////////qtest.close();
 
			     File outputFile=new File(f +"/Tremplin_"+questionFromBdd.getnom()+".jpg"); 
 
			     FileInputStream fis = new FileInputStream(inputFile);
 
			     FileOutputStream fos = new FileOutputStream(outputFile);
			     int c;
 
			     while ((c = fis.read()) != -1)
			     {
			        fos.write(c);
			     }
 
			     fos.close();
			     fis.close();
 
			 } catch (FileNotFoundException e) {
			     System.err.println("FileStreamsTest: " + e);
			 } catch (IOException e) {
			     System.err.println("FileStreamsTest: " + e);
			 }
 
	 qtest.close();//uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
	}
 
 
 //questionBDD qtest=new questionBDD(this);	
 
 
 
 private void precede(){
 
 
	 questionBDD qtest=new questionBDD(this);
 
	 	qtest.open();
		question questionFromBdd = qtest.getquestionWithid(nb);
 
		//Si la question est bien dans la base 
		if(questionFromBdd != null){
 
			num_q.setText("QESTION N° "+questionFromBdd.getqnum());
			lib_q.setText(questionFromBdd.getqlib());
			choix1.setText(" "+questionFromBdd.getqc1());
			choix2.setText(" "+questionFromBdd.getqc2());
			choix3.setText(" "+questionFromBdd.getqc3());
			choix4.setText(" "+questionFromBdd.getqc4());
 
			if (questionFromBdd.getqc1().length() == 0){choix1.setVisibility(255);}else{choix1.setVisibility(0);}
			if (questionFromBdd.getqc2().length() == 0){choix2.setVisibility(255);}else{choix2.setVisibility(0);}
			if (questionFromBdd.getqc3().length() == 0){choix3.setVisibility(255);}else{choix3.setVisibility(0);}
			if (questionFromBdd.getqc4().length() == 0){choix4.setVisibility(255);}else{choix4.setVisibility(0);}
 
			}
 
		qtest.close(); 
 }
 
 
 
//*************************revenir à la question précédente**********************************
	private OnClickListener prevListener = new OnClickListener() {
 
		@Override
		    public void onClick(View v) {
 
			choix1.setChecked(false);choix2.setChecked(false);choix3.setChecked(false);choix4.setChecked(false);
 
			valider.setClickable(true);
 
			next.setClickable(true);
 
			int butemin=nb;
			while ((nb>=3) && (vec[nb-2]==0)){nb=nb-1;}	
				if (nb==1){} 
				else { if ((nb==2) && (vec[0]==0)){nb=butemin;} else {nb=nb-1;}}	
 
 
				precede();
 
 
		}
 
	};
 
//****************************************************************************************************
 
 
 
	private void suit(){
 
		 questionBDD qtest=new questionBDD(this);	
 
		qtest.open();
 
		question questionFromBdd = qtest.getquestionWithid(nb);
 
		//Si la question est bien dans la base 
		if(questionFromBdd != null){
 
			num_q.setText("QESTION N° "+questionFromBdd.getqnum());
			lib_q.setText(questionFromBdd.getqlib());
			choix1.setText(" "+questionFromBdd.getqc1());
			choix2.setText(" "+questionFromBdd.getqc2());
			choix3.setText(" "+questionFromBdd.getqc3());
			choix4.setText(" "+questionFromBdd.getqc4());
 
			if (questionFromBdd.getqc1().length() == 0){choix1.setVisibility(255);}else{choix1.setVisibility(0);}
			if (questionFromBdd.getqc2().length() == 0){choix2.setVisibility(255);}else{choix2.setVisibility(0);}
			if (questionFromBdd.getqc3().length() == 0){choix3.setVisibility(255);}else{choix3.setVisibility(0);}
			if (questionFromBdd.getqc4().length() == 0){choix4.setVisibility(255);}else{choix4.setVisibility(0);}
 
			}
 
		qtest.close();
	}
 
 
//*************************passer à la question suivante**********************************************	
	private OnClickListener nextListener = new OnClickListener() {
 
		@Override
			public void onClick(View v) {
 
			choix1.setChecked(false);choix2.setChecked(false);choix3.setChecked(false);choix4.setChecked(false);
 
			valider.setClickable(true);
 
			prev.setClickable(true);
 
			int butemax=nb;
			while ((nb<=nbqmax-2) && (vec[nb]==0)){nb=nb+1;}	
			if (nb==nbqmax){nb=butemax;} 
			else { if ((nb==nbqmax-1) && (vec[nbqmax-1]==0)){nb=butemax;} else {nb=nb+1;}}
 
 
			suit();
 
		}
	};
 
 
 
private void razchoixq(){
	questionBDD qtest=new questionBDD(this);	
	qtest.open();	
	question questionFromBdd = qtest.getquestionWithid(nb);
	questionFromBdd.setch1("");questionFromBdd.setch2("");questionFromBdd.setch3("");questionFromBdd.setch4("");	
	if (choix1.isChecked()==true){questionFromBdd.setch1("X");}
	if (choix2.isChecked()==true){questionFromBdd.setch2("X");}
	if (choix3.isChecked()==true){questionFromBdd.setch3("X");}
	if (choix4.isChecked()==true){questionFromBdd.setch4("X");}
	qtest.close();	
}
 
private void choixu(){
	questionBDD qtest=new questionBDD(this);	
	qtest.open();	
	question questionFromBdd = qtest.getquestionWithid(nb);
 
	if (questionFromBdd.getchunic().length() !=0){
	if (((choix1.isChecked()==true) && (choix2.isChecked()==false) && (choix3.isChecked()==false) && (choix4.isChecked()==false))
	|| ((choix1.isChecked()==false) && (choix2.isChecked()==true) && (choix3.isChecked()==false) && (choix4.isChecked()==false))
	|| ((choix1.isChecked()==false) && (choix2.isChecked()==false) && (choix3.isChecked()==true) && (choix4.isChecked()==false))
	|| ((choix1.isChecked()==false) && (choix2.isChecked()==false) && (choix3.isChecked()==false) && (choix4.isChecked()==true)))
	{				
	questionFromBdd.setch1("");questionFromBdd.setch2("");questionFromBdd.setch3("");questionFromBdd.setch4("");	
	if (choix1.isChecked()==true){questionFromBdd.setch1("X");}
	if (choix2.isChecked()==true){questionFromBdd.setch2("X");}
	if (choix3.isChecked()==true){questionFromBdd.setch3("X");}
	if (choix4.isChecked()==true){questionFromBdd.setch4("X");}
 
	questionFromBdd.setqnum(0);
	qtest.updatequestion(nb, questionFromBdd);
 
 
 
	choix1.setChecked(false);choix2.setChecked(false);choix3.setChecked(false);choix4.setChecked(false);
 
	vec[nb-1]=0;
	valider.setClickable(false);
	mem=nb;
 
	int noprev=nb;
	while ((noprev>=2) && (vec[noprev-2]==0)){noprev=noprev-1;}
	if (noprev==1){prev.setClickable(false);}
 
	int nonext=nb;
	while ((nonext<nbqmax) && (vec[nonext]==0)){nonext=nonext+1;}
	if (nonext==nbqmax){next.setClickable(false);}
 
	int nbfin=0;
	while ((nbfin<=nbqmax-1) && (vec[nbfin]==0)){nbfin=nbfin+1;}
	nbfin=nbfin+1;
 
	//question questionFromBdd5 = qtest.getquestionWithid(nb);
 
	if(nbfin==nbqmax+1){
 
		num_q.setText(" ");
		lib_q.setText("vous avez répondu à toutes les questions,"+"\n"+"\n                       MERCI !");
		choix1.setText(" ");
		choix2.setText(" ");
		choix3.setText(" ");
		choix4.setText(" ");
 
		choix1.setVisibility(255);
		choix2.setVisibility(255);
		choix3.setVisibility(255);
		choix4.setVisibility(255);
 
		valider.setClickable(false);
		next.setClickable(false);
		prev.setClickable(false);
 
		//Intent secondeActivite = new Intent(MainActivity.this, renvoyer.class);        
		//startActivity(secondeActivite);						
		//finish();
 
	}
	else{
 
		////////////////////////////////////////qtest.open();
	//Si la question est bien dans la base 
	if(questionFromBdd != null){
		//////////////////////////////////////////////////////////////////////////////////////////555555555555555555555
		num_q.setText("QESTION N° "+questionFromBdd.getqnum());
		lib_q.setText(questionFromBdd.getqlib());
		choix1.setText(" "+questionFromBdd.getqc1());
		choix2.setText(" "+questionFromBdd.getqc2());
		choix3.setText(" "+questionFromBdd.getqc3());
		choix4.setText(" "+questionFromBdd.getqc4());
 
		if (questionFromBdd.getqc1().length() == 0){choix1.setVisibility(255);}else{choix1.setVisibility(0);}
		if (questionFromBdd.getqc2().length() == 0){choix2.setVisibility(255);}else{choix2.setVisibility(0);}
		if (questionFromBdd.getqc3().length() == 0){choix3.setVisibility(255);}else{choix3.setVisibility(0);}
		if (questionFromBdd.getqc4().length() == 0){choix4.setVisibility(255);}else{choix4.setVisibility(0);}
		/////////////////////////////////////////////////////////////////////////////////////////////////////////////5555555555555555
		}	
	///////////////////////////////////////////////qtest.close();
	}
	////////////////////////////qtest.close();
 
	//////////////////////////////qtest.close();
 
	//sdcarde();
 
	////////////////////////////////////////////////////qtest.close();
 
	cnt=0;compteur=0;
	while (cnt<nbqmax){if (vec[cnt]==0){compteur=compteur+1;}cnt=cnt+1;}
	count_q.setProgress(compteur);
 
	Toast t1 = Toast.makeText(MainActivity.this,"réponse enregistrée", Toast.LENGTH_SHORT);t1.show();}
 
	else{Toast t2 = Toast.makeText(MainActivity.this,"un seul choix possible", Toast.LENGTH_SHORT);t2.show();}
 
}
	qtest.close();
}	
 
 
 
//*************************************************************valider et enregistrement de la reponse**************************************************************
//*********************************************************************************************************************************************	
	private OnClickListener validerListener = new OnClickListener() {
 
		@Override
		    public void onClick(View v) {
 
			razchoixq();
 
			choixu();
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
		}
 
	};
 
 
 
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
 
 
 
}