这是我的dbhelper.java。错误表明它找不到数据库。任何人都可以帮我看看为什么它找不到数据库表？ 数据库名称= crmate database table = user
package com.webileapps.navdrawer;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
public class DbHelper extends SQLiteOpenHelper{
public static final String DATABASE_NAME="crmate";
public static final String DATABASE_TABLES="user";
public static final int DATABASE_VERSION=1;
public static String path ="/data/data/com.webileapps.navdrawer/databases/";
public static String KEY_ROWID="User_ID";
public static String KEY_USERNAME="User_Name";
public static String KEY_AGE="Age";
public static String KEY_ClINIC="Clinic";
public static String KEY_PHONE="Phone";
public static String KEY_EMAIL="Email";
public static String KEY_DATESIGNUP="Date_Signup";
public static String KEY_CONDITIONID="Condition_ID";
public static String KEY_DOCTORID="Doctor_ID";
public static String KEY_LOGINID="Login_ID";
public static String KEY_ACTIVITYNAME="Activity_Name";
public static String KEY_NOTIFICATIONNAME="Notification_Name";
public static String KEY_GROUPNAME="Group_Name";
public static String KEY_APPROVED="Approved";
private final Context ourContext;
private DbHelper ourhelper;
private static SQLiteDatabase ourdatabase;
public static Context context;
public DbHelper(Context context){
//super(context,DATABASE_NAME,null,DATABASE_VERSION);
super(context, DATABASE_NAME, null, 1);
this.ourContext = context;
}
public void createDataBase() throws IOException{
//check if the database exists
boolean databaseExist = checkDataBase();
if(databaseExist){
// Do Nothing.
}else{
this.getWritableDatabase();
copyDataBase();
}// end if else dbExist
}
public boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try{
String myPath = path + DATABASE_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}catch(SQLiteException e){
//database does't exist yet.
}
if(checkDB != null){
checkDB.close();
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = context.getAssets().open(DATABASE_NAME);
// Path to the just created empty db
String outFileName = path + DATABASE_NAME;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the input file to the output file
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException{
//Open the database
String myPath =path + DATABASE_NAME;
ourdatabase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
}
@Override
public synchronized void close() {
if(ourdatabase != null)
ourdatabase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
//db.execSQL("DROP TABLE IF EXISTS"+DATABASE_TABLES);
//onCreate(db);
}
public String getUserNameFromDB(){
String query = "select User_First_Name From "+DATABASE_NAME;
Cursor cursor = ourdatabase.rawQuery(query, null);
String userName = null;
if(cursor.getCount()>0){
if(cursor.moveToFirst()){
do{
userName = cursor.getString(0);
}while (cursor.moveToNext());
}
}
return userName;
}
public String [] getDataarray(){
String[] profilearray = new String[]{ KEY_USERNAME,KEY_AGE,KEY_ClINIC,KEY_PHONE,KEY_EMAIL,KEY_DATESIGNUP
,KEY_CONDITIONID,KEY_DOCTORID,KEY_LOGINID,KEY_ACTIVITYNAME,KEY_NOTIFICATIONNAME,KEY_GROUPNAME,KEY_APPROVED
};
SQLiteQueryBuilder querybuilder=new SQLiteQueryBuilder();
querybuilder.setTables(DATABASE_TABLES);
String [] columns= new String[]{ KEY_ROWID,KEY_USERNAME,KEY_AGE,KEY_ClINIC,KEY_PHONE,KEY_EMAIL,KEY_DATESIGNUP
,KEY_CONDITIONID,KEY_DOCTORID,KEY_LOGINID,KEY_ACTIVITYNAME,KEY_NOTIFICATIONNAME,KEY_GROUPNAME,KEY_APPROVED
};
Cursor c= ourdatabase.query(DATABASE_TABLES, columns, null,null, null, null, null);
if(c.moveToFirst()) {
int iUserName=c.getColumnIndex(KEY_USERNAME);
int iAge=c.getColumnIndex(KEY_AGE);
int iClinic=c.getColumnIndex(KEY_ClINIC);
int iPhone=c.getColumnIndex(KEY_PHONE);
int iEmail=c.getColumnIndex(KEY_EMAIL);
int iDateSignup=c.getColumnIndex(KEY_DATESIGNUP);
int iConditionID=c.getColumnIndex(KEY_CONDITIONID);
int iDoctorID=c.getColumnIndex(KEY_DOCTORID);
int iLoginID=c.getColumnIndex(KEY_LOGINID);
int iActivityName=c.getColumnIndex(KEY_ACTIVITYNAME);
int iNotificationName=c.getColumnIndex(KEY_NOTIFICATIONNAME);
int iGroupName=c.getColumnIndex(KEY_GROUPNAME);
int iApproved=c.getColumnIndex(KEY_APPROVED);
profilearray[0] = c.getString(iUserName);
profilearray[1] = c.getString(iAge);
profilearray[2] = c.getString(iClinic);
profilearray[3] = c.getString(iPhone);
profilearray[4] = c.getString(iEmail);
profilearray[5] = c.getString(iDateSignup);
profilearray[6] = c.getString(iConditionID);
profilearray[7] = c.getString(iDoctorID);
profilearray[8] = c.getString(iLoginID);
profilearray[9] = c.getString(iActivityName);
profilearray[10] = c.getString(iNotificationName);
profilearray[11] = c.getString(iGroupName);
profilearray[12] = c.getString(iApproved);
}
return profilearray;
}
}
这是我展示它的页面。
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootview = inflater.inflate(R.layout.user,container,false);
Resources res=getResources();
Profile=res.getStringArray(R.array.Profile);
//condition=res.getStringArray(R.array.Profile_values);
DbHelper myDbHelper = new DbHelper(getActivity().getApplicationContext());
try {
myDbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
myDbHelper.openDataBase();
condition=myDbHelper.getDataarray();
myDbHelper.close();
}catch(SQLException sqle){
throw sqle;
}
list=(ListView)rootview.findViewById(R.id.listView1);
VivzAdapter adapter = new VivzAdapter (getActivity(),Profile);
list.setAdapter(adapter);
return rootview;
}
}
public View getView( int position ,View convertView,ViewGroup parent){
LayoutInflater inflater= (LayoutInflater) context.getSystemService(android.content.Context.LAYOUT_INFLATER_SERVICE);
View row =inflater.inflate(R.layout.profile_list,parent,false);
TextView myProfile=(TextView)row.findViewById(R.id.Profile);
TextView myCondition=(TextView)row.findViewById(R.id.condition);
myProfile.setText(ProfileArray[position]);
myCondition.setText(resultarray[position]);
return row;