在SQLite数据库中插入行时出现问题

我试图在数据库中插入行,但没有任何内容被持久化。这是我的助手课程:

    package com.android.cancertrials;
import java.util.Calendar;
import java.util.GregorianCalendar;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DataBaseHelper extends SQLiteOpenHelper{

    public DataBaseHelper(Context context, String name) {
        super(context, name, null, 1);
        // TODO Auto-generated constructor stub
    }



    @Override
    public void onCreate(SQLiteDatabase db) {
        System.out.println("the database in onCreate: "+db);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    }

    @Override
    public void onOpen(SQLiteDatabase db) {
        System.out.println("the database: "+db);
        this.db=db;
        super.onOpen(db);
    }

    public void insertRecordBean(RecordBean recordbean){
        ContentValues content=new ContentValues();
        content.put("TrialPhase", AdvanceSearchTab2.phaseOptions.toString());
        content.put("TrialStatus", AdvanceSearchTab2.typeOptions.toString());
        content.put("StudyType", AdvanceSearchTab2.statusOptions.toString());
        content.put("ContactType", AdvanceSearchTab2.contactSpinner.toString());
        content.put("MileRange", AdvanceSearchTab2.rangeSpinner.toString());
        content.put("Location", AdvanceSearchTab2.locationSpinner.toString());


        db.insert("tblClinicalTrial", null, content);
    }


    /*public void insertRecordResult(RecordBean recordbean){
        ContentValues content1=new ContentValues();

        content1.put("NCTID", recordbean.getNctId());
        content1.put("Title", recordbean.getTitle());
        content1.put("TrialPhase", recordbean.getTrialPhase());
        content1.put("TrialStaus", recordbean.getTrialStatus());
        content1.put("Summary", recordbean.getSummary());
        content1.put("Conditions", recordbean.getConditions());
        content1.put("Interventions", recordbean.getIntervention());
        content1.put("Description", recordbean.getDescription());
        content1.put("SponserName", recordbean.getSponsor());
        content1.put("Inclusion", recordbean.getInclusionCriteria());
        content1.put("Exclusion", recordbean.getExclusionCriteria());
        content1.put("StudyPop", recordbean.getStudyPop());
        content1.put("MinAge", recordbean.getMinimumAge());
        content1.put("MaxAge", recordbean.getMaximumAge());
        content1.put("Gender", recordbean.getGender());
        content1.put("Hvolunteer", recordbean.getHealthyVolunteers());
        content1.put("EnrollmentType", recordbean.getEnrollment());
        content1.put("EnrollmentNum", recordbean.getEnrollment());
        content1.put("VerifiedOn", recordbean.getVerifiedOn());


        db.insert("tblResultItem", null, content1);
    }*/



    public void insertRecordBookmark(RecordBean recordbean){
        ContentValues content2=new ContentValues();
        content2.put("NCTID", recordbean.getNctId());
        content2.put("Title", recordbean.getTitle());
        content2.put("TrialPhase", recordbean.getTrialPhase());
        content2.put("TrialStatus", recordbean.getTrialStatus());
        content2.put("Summary", recordbean.getSummary());
        content2.put("Conditions", recordbean.getConditions());
        content2.put("Interventions", recordbean.getIntervention());
        content2.put("Description", recordbean.getDescription());
        content2.put("SponserName", recordbean.getSponsor());
        content2.put("Inclusion", recordbean.getInclusionCriteria());
        content2.put("Exclusion", recordbean.getExclusionCriteria());
        content2.put("StudyPop", recordbean.getStudyPop());
        content2.put("MinAge", recordbean.getMinimumAge());
        content2.put("MaxAge", recordbean.getMaximumAge());
        content2.put("Gender", recordbean.getGender());
        content2.put("Hvolunteer", recordbean.getHealthyVolunteers());
        content2.put("EnrollmentType", recordbean.getEnrollment());
        content2.put("EnrollmentNum", recordbean.getEnrollment());
        content2.put("VerifiedOn", recordbean.getVerifiedOn());
        content2.put("UpdatedOn", recordbean.getUpdatedOn());
        content2.put("LocationName", recordbean.getLocationName());
        content2.put("LocationStatus", recordbean.getLocationStatus());
        content2.put("City", recordbean.getCity());
        content2.put("State", recordbean.getState());
        content2.put("Country", recordbean.getCountry());
        content2.put("Distance", recordbean.getLocationDist());
        content2.put("Long", recordbean.getLongitude());
        content2.put("lat", recordbean.getLatitude());
        content2.put("Url", recordbean.getSourceUrl());
        content2.put("Location_id", recordbean.getLocationId());
        content2.put("Zip_code", recordbean.getZip());
        db.insert("tblBookMarkItem", null, content2);
    }

    public Cursor getBookMarks(){
        String[] columns={"_id","Title","Gender","TrialPhase","Zip_code","Location_id","NCTID"};
        return db.query("tblBookMarkItem", columns, null, null, null, null, null);
    }
    public Cursor getRecent(){
        String[] columns={"SearchString","ProfileDate","_id","years","Gender","TrialPhase","StudyType","TrialStatus","ContactType","MileRange","LocationZip","UrlParameter"};
        return db.query("tblProfile", columns, null, null, null, null, null);
    }

    public void insertRecordProfile(String search,String url){
        ContentValues content4=new ContentValues();
        GregorianCalendar c=new GregorianCalendar();

        content4.put("ProfileDate",c.get(GregorianCalendar.DATE)+"/"+(c.get(GregorianCalendar.MONTH)+1)+"/"+ c.get(GregorianCalendar.YEAR));
//      content4.put("years", age);
        //content3.put("ProfileType", AdvanceSearchTab2.typeOptions.toString());
        //content4.put("months", AdvanceSearchTab1.ageEdit.getText().toString());
        content4.put("SearchString", search);
//      content4.put("Gender", gender);
//      content4.put("TrialPhase", phase);
//      content4.put("StudyType", study);
//      content4.put("TrialStatus", status);
//      content4.put("ContactType", contact);
//      content4.put("MileRange", mile);
//      content4.put("LocationZip", zip);
//      //content4.put("searchString", AdvanceSearchTab1.edit_se.toString());
        content4.put("UrlParameter", url);
        db.insert("tblProfile", null, content4);

    }



    public void insertRecordMedical(RecordBean recordbean){
        ContentValues content3=new ContentValues();

        content3.put("years", AdvanceSearchTab1.ageEdit.toString());
        content3.put("months", AdvanceSearchTab1.ageEdit.toString());
        content3.put("searchString", AdvanceSearchTab1.edit_se.toString());
        content3.put("Gender", AdvanceSearchTab1.hubSpinner.toString());

        db.insert("tblMedicalProfile", null, content3);

    }


    public void deleteRecord(int id){
        //_id=1;
        db.delete("tblBookMarkItem", "_id="+id, null);

    }
    public void deleteRecent(int id){
        //_id=1;
        db.delete("tblProfile", "_id="+id, null);

    }

    private SQLiteDatabase db;

}

当我在ListAdapter中显示它时,它看起来很好。一旦我终止我的申请。我的更改没有持久化。这是为什么?