java - 运行 SQLite 命令时 Android Studio 日志显示错误

问题描述

我正在尝试创建一个数据库和一个表来存储我的卡的详细信息，然后显示它。我创建了这个架构

public class MyDatabaseHelper extends SQLiteOpenHelper {
    private Context context;
    private static String DB_NAME="CardsDetails.db";
    private static final int DB_VERSION=1;
    private static final String table_name="my_cards";
    private static final String id="_id";
    private static final String card_num="Card Number";
    private static final String cvv="cvv";
    private static final String year="year";
    private static final String month="month";
    private static final String user_name="Name on Card";



    public MyDatabaseHelper(@Nullable Context context) {
        super(context,DB_NAME,null,DB_VERSION);
        this.context=context;
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
       
        String query= "CREATE TABLE "+table_name+" ("+id+" INTEGER PRIMARY KEY AUTOINCREMENT, "+"card_num"+" TEXT, "+month+" TEXT, "+year+" TEXT, "+cvv+" TEXT, "+user_name+" TEXT);";
        db.execSQL(query);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int i, int i1) {
        db.execSQL("DROP TABLE IF EXISTS "+table_name);
        onCreate(db);

    }
    void addCard(String CardNo, String mon_, String year_, String cvv_, String name)
    {
        SQLiteDatabase db=this.getWritableDatabase();
        ContentValues cv=new ContentValues();
        cv.put(card_num,CardNo);
        cv.put(month,mon_);
        cv.put(year,year_);
        cv.put(cvv,cvv_);
        cv.put(user_name,name);
        long result=db.insert(table_name,null,cv);
        if(result==-1)
            Toast.makeText(context,"Input Failed!",Toast.LENGTH_LONG).show();
        else
            Toast.makeText(context,"Card Saved Successfully",Toast.LENGTH_LONG).show();
    }
}

但是，我在这段代码中遇到了一些我不理解的错误和异常。这是日志中的片段。

E/SQLiteLog: (1) near "on": syntax error
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.antas.fingerprintauth, PID: 22200
    android.database.sqlite.SQLiteException: near "on": syntax error (code 1 SQLITE_ERROR): , while compiling: CREATE TABLE my_cards (_id INTEGER PRIMARY KEY AUTOINCREMENT, card_num TEXT, month TEXT, year TEXT, cvv TEXT, Name on Card TEXT);
        at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
        at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:986)
        at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:593)
        at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:590)
        at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:61)
        at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:33)
        at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1850)
        at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1773)
        at com.antas.fingerprintauth.MyDatabaseHelper.onCreate(MyDatabaseHelper.java:34)
        at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:412)
        at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:317)
        at com.antas.fingerprintauth.MyDatabaseHelper.addCard(MyDatabaseHelper.java:45)
        at com.antas.fingerprintauth.AddDetails$1.onClick(AddDetails.java:60)
        at android.view.View.performClick(View.java:7218)
        at android.view.View.performClickInternal(View.java:7187)
        at android.view.View.access$3500(View.java:817)
        at android.view.View$PerformClick.run(View.java:27629)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7707)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:516)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

这是我将数据插入数据库的活动。

public class AddDetails extends AppCompatActivity {
    EditText card_num, cvv, yr, mo, user;
    int i = 0;
    Button saveBtn;
    ImageButton validate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_details);

        card_num = (EditText) findViewById(R.id.cardnum);
        cvv = (EditText) findViewById(R.id.cvv);
        yr = (EditText) findViewById(R.id.year);
        mo = (EditText) findViewById(R.id.month);
        saveBtn = (Button) findViewById(R.id.save);
        user = (EditText) findViewById(R.id.nameCard);
        validate = (ImageButton) findViewById(R.id.visibility);
        card_num.requestFocus();


        saveBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
               .setError("Enter Name on Card");
                }
                else {*/
                MyDatabaseHelper myDatabaseHelper = new MyDatabaseHelper(AddDetails.this);
                myDatabaseHelper.addCard(card_num.getText().toString().trim(), mo.getText().toString().trim(), yr.getText().toString().trim(), cvv.getText().toString().trim(), user.getText().toString().trim());
            }

        });

      }
    }

有人可以帮帮我吗！

标签： javaandroidsqlite

java - 运行 SQLite 命令时 Android Studio 日志显示错误

问题描述

解决方案

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