Java 我的Android应用程序在emulator上运行，但在我的Android设备上不工作

我的应用程序在android emulator上运行良好。当我试图在我的设备上运行它时，LogCat列会告诉我没有这样的列：USERNAME。 在emulator上，我的SQLite数据库是正常创建的，我可以添加新用户并登录，但当我尝试这样做时，在设备中会出现异常

以下是我尝试创建新用户时的日志文件：

02-14 17:29:07.997: D/BubblePopupHelper(9620): isShowingBubblePopup : false
02-14 17:30:07.617: E/SQLiteLog(10274): (1) no such column: USERNAME
02-14 17:30:07.627: D/AndroidRuntime(10274): Shutting down VM
02-14 17:30:07.627: E/AndroidRuntime(10274): FATAL EXCEPTION: main
02-14 17:30:07.627: E/AndroidRuntime(10274): Process: com.example.naukamagisterka, PID: 10274
02-14 17:30:07.627: E/AndroidRuntime(10274): android.database.sqlite.SQLiteException: no such column: USERNAME (code 1): , while compiling: SELECT * FROM USERS WHERE  USERNAME=?
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:897)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:508)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:726)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1426)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1273)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1144)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1312)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at com.example.naukamagisterka.LoginDataBaseAdapter.getSingleEntryUsers(LoginDataBaseAdapter.java:81)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at com.example.naukamagisterka.SignUPActivity$1.onClick(SignUPActivity.java:44)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.view.View.performClick(View.java:4764)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.view.View$PerformClick.run(View.java:19844)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.os.Handler.handleCallback(Handler.java:739)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.os.Handler.dispatchMessage(Handler.java:95)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.os.Looper.loop(Looper.java:135)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at android.app.ActivityThread.main(ActivityThread.java:5376)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at java.lang.reflect.Method.invoke(Native Method)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at java.lang.reflect.Method.invoke(Method.java:372)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
02-14 17:30:07.627: E/AndroidRuntime(10274):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)

LoginDataBaseAdapter.java

package com.example.naukamagisterka;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.widget.Toast;

public class LoginDataBaseAdapter {
    static final String DATABASE_NAME = "WylaczSwiatloDB";
    static final int DATABASE_VERSION=1;
    public static final int NAME_COULMN=1;

    public String Email;
    public String Password;
    public int Points;

    LoginDataBaseAdapter loginDataBaseAdapter;

    static final String DATABASE_CREATE = "CREATE TABLE "+"USERS"+"(USERNAME VARCHAR, PASSWORD VARCHAR, POINTS INT)"+";"+"";

    public SQLiteDatabase db;
    private final Context context;
    private DataBaseHelper dbHelper;


    public LoginDataBaseAdapter(Context _context){
        context=_context;
        dbHelper = new DataBaseHelper(context, DATABASE_NAME, null, DATABASE_VERSION);

    }

    public LoginDataBaseAdapter open() throws SQLException{
        db=dbHelper.getWritableDatabase();
        return this;
    }

    public void close(){
        db.close();
    }

    public SQLiteDatabase getDatabaseInstance(){
        return db;
    }

    public void insertEntry(String userName, String password){
        ContentValues newValues = new ContentValues();

        newValues.put("USERNAME", userName);
        newValues.put("PASSWORD", password);
        newValues.put("POINTS", 0);

        db.insert("USERS", null, newValues);
    }

    public int deleteEntry(String UserName){
        String where = "USERNAME=?";
        int numberOFEntriesDeleted = db.delete("USERS", where, new String[]{UserName});
        return numberOFEntriesDeleted;
    }

    public String getSingleEntry(String userName){
        Cursor cursor = db.query("USERS", null, "USERNAME=?", new String[]{userName},null,null,null);
        if (cursor.getCount()<1) //Nie ma username
        {
            cursor.close();
            return "NOT EXIST";
        }

        else{
        cursor.moveToFirst();
        String password = cursor.getString(cursor.getColumnIndex("PASSWORD"));
        cursor.close();
        return password;
        }

    }

    public String getSingleEntryUsers(String userName){
        Cursor cursor = db.query("USERS", null, " USERNAME=?", new String[]{userName},null,null,null);
        if (cursor.getCount()<1) //Nie ma username
        {
            cursor.close();
            return "NOT EXIST";
        }

        else{
        cursor.moveToFirst();
        String user = cursor.getString(cursor.getColumnIndex("USERNAME"));
        cursor.close();
        return user;
        }

    }

    public void updateEntry(String userName, String password){
            ContentValues updateValues = new ContentValues();
            updateValues.put("USERNAME", userName);
            updateValues.put("PASSWORD", password);
            updateValues.put("POINTS", 0);

            String where = "USERNAME=?";
            db.update("USERS", updateValues, where, new String[]{userName});

        //String storedUsers = loginDataBaseAdapter.getSingleEntry(userName);

    }

    public void displayToast(String value){

         Toast.makeText(context, value, Toast.LENGTH_LONG).show();
    }

}

package com.example.naukamagisterka；
导入android.content.ContentValues；
导入android.content.Context；
导入android.database.Cursor；
导入android.database.SQLException；
导入android.database.sqlite.SQLiteDatabase；
导入android.widget.Toast；
公共类后勤数据库适配器{
静态最终字符串数据库_NAME=“WylaczSwiatloDB”；
静态最终int数据库_版本=1；
公共静态final int NAME_COULMN=1；
公共字符串电子邮件；
公共字符串密码；
公共积分；
LoginDataBaseAdapter LoginDataBaseAdapter；
静态最终字符串数据库_CREATE=“CREATE TABLE”+“USERS”+“（USERNAME VARCHAR，PASSWORD VARCHAR，POINTS INT）”+”；“+”；
公共数据库数据库；
私人最终语境；
私有数据库助手dbHelper；
公共登录数据库适配器（上下文_上下文）{
上下文=_上下文；
dbHelper=newdatabasehelper（上下文、数据库名称、null、数据库版本）；
}
public LoginDataBaseAdapter open（）引发SQLException{
db=dbHelper.getWritableDatabase（）；
归还这个；
}
公众假期结束（）{
db.close（）；
}
公共SQLiteDatabase getDatabaseInstance（）{
返回分贝；
}
public void insertEntry（字符串用户名、字符串密码）{
ContentValues newValues=新ContentValues（）；
newValues.put（“用户名”，用户名）；
newValues.put（“密码”，PASSWORD）；
newValues.put（“点”，0）；
db.insert（“用户”，null，newvalue）；
}
public int deleteEntry（字符串用户名）{
字符串，其中=“USERNAME=？”；
int numberofentriesdelected=db.delete（“用户”，其中，新字符串[]{UserName}）；
已删除的返回编号；
}
公共字符串getSingleEntry（字符串用户名）{
Cursor Cursor=db.query（“USERS”，null，“USERNAME=？”，新字符串[]{USERNAME}，null，null，null）；
如果（cursor.getCount（），您可能更改了数据库模式，但没有增加数据库的版本，因此新应用程序正在查找旧的数据库

static final int DATABASE_VERSION=2;

应该修复它。
尝试卸载设备上的应用程序并重新运行。
数据库创建字符串在哪里使用？您可能已经删除了它吗？我正在另一个名为DataBaseHelper的类中使用DATABASE\u创建字符串。正如我在模拟器上所说的，一切正常。显示该helper类。DB中没有任何更改schema@Adrian-玛祖克iewicz在将应用程序安装到手机上之后，您可能在某个时候更改了该专栏的名称，但在将其安装到模拟系统之前，它确实有所帮助；）谢谢
package com.example.naukamagisterka;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.widget.Toast;

public class LoginDataBaseAdapter {
    static final String DATABASE_NAME = "WylaczSwiatloDB";
    static final int DATABASE_VERSION=1;
    public static final int NAME_COULMN=1;

    public String Email;
    public String Password;
    public int Points;

    LoginDataBaseAdapter loginDataBaseAdapter;

    static final String DATABASE_CREATE = "CREATE TABLE "+"USERS"+"(USERNAME VARCHAR, PASSWORD VARCHAR, POINTS INT)"+";"+"";

    public SQLiteDatabase db;
    private final Context context;
    private DataBaseHelper dbHelper;


    public LoginDataBaseAdapter(Context _context){
        context=_context;
        dbHelper = new DataBaseHelper(context, DATABASE_NAME, null, DATABASE_VERSION);

    }

    public LoginDataBaseAdapter open() throws SQLException{
        db=dbHelper.getWritableDatabase();
        return this;
    }

    public void close(){
        db.close();
    }

    public SQLiteDatabase getDatabaseInstance(){
        return db;
    }

    public void insertEntry(String userName, String password){
        ContentValues newValues = new ContentValues();

        newValues.put("USERNAME", userName);
        newValues.put("PASSWORD", password);
        newValues.put("POINTS", 0);

        db.insert("USERS", null, newValues);
    }

    public int deleteEntry(String UserName){
        String where = "USERNAME=?";
        int numberOFEntriesDeleted = db.delete("USERS", where, new String[]{UserName});
        return numberOFEntriesDeleted;
    }

    public String getSingleEntry(String userName){
        Cursor cursor = db.query("USERS", null, "USERNAME=?", new String[]{userName},null,null,null);
        if (cursor.getCount()<1) //Nie ma username
        {
            cursor.close();
            return "NOT EXIST";
        }

        else{
        cursor.moveToFirst();
        String password = cursor.getString(cursor.getColumnIndex("PASSWORD"));
        cursor.close();
        return password;
        }

    }

    public String getSingleEntryUsers(String userName){
        Cursor cursor = db.query("USERS", null, " USERNAME=?", new String[]{userName},null,null,null);
        if (cursor.getCount()<1) //Nie ma username
        {
            cursor.close();
            return "NOT EXIST";
        }

        else{
        cursor.moveToFirst();
        String user = cursor.getString(cursor.getColumnIndex("USERNAME"));
        cursor.close();
        return user;
        }

    }

    public void updateEntry(String userName, String password){
            ContentValues updateValues = new ContentValues();
            updateValues.put("USERNAME", userName);
            updateValues.put("PASSWORD", password);
            updateValues.put("POINTS", 0);

            String where = "USERNAME=?";
            db.update("USERS", updateValues, where, new String[]{userName});

        //String storedUsers = loginDataBaseAdapter.getSingleEntry(userName);

    }

    public void displayToast(String value){

         Toast.makeText(context, value, Toast.LENGTH_LONG).show();
    }

}

static final int DATABASE_VERSION=2;