我正在尝试编写一个比赛数据库，您可以在其中输入比赛名称和比赛日期，然后单击该比赛名称，然后编辑/删除它或日期。我无法输入日期。下面是我的 LogCat 错误。我究竟做错了什么 ？
//LOGCAT
12-08 20:15:35.710: I/Database(1648): sqlite returned: error code = 1, msg = near "FROM": syntax error
12-08 20:15:35.710: E/ERROR(1648): ERROR IN CODE: android.database.sqlite.SQLiteException: near "FROM": syntax error: , while compiling: SELECT _id, note FROM Races, date FROM Races
12-08 20:15:35.721: W/System.err(1648): android.database.sqlite.SQLiteException: near "FROM": syntax error: , while compiling: SELECT _id, note FROM Races, date FROM Races
12-08 20:15:35.730: W/System.err(1648): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
//View races java code
package com.CIS2818.tritracker;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.CursorAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
public class View_races extends Activity {
NoteAdapter adapter=null;
RaceHelper helper2=null;
Cursor dataset_cursor=null;
EditText editNote2=null;
EditText editNote3=null;
String noteId2=null;
String TAG = "INFORMATION";
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try
{
setContentView(R.layout.activity_view_races);
ListView list2=(ListView)findViewById(R.id.list2);
editNote2 = (EditText)findViewById(R.id.myEditText2);
editNote3 = (EditText)findViewById(R.id.myEditText3);
helper2=new RaceHelper(this);
dataset_cursor=helper2.getAll();
startManagingCursor(dataset_cursor);
adapter=new NoteAdapter(dataset_cursor);
list2.setAdapter(adapter);
Button btnSimple2 = (Button) findViewById(R.id.btnSimple2);
btnSimple2.setOnClickListener(onSave);
Button btnDelete2 = (Button) findViewById(R.id.btnDelete2);
btnDelete2.setOnClickListener(onDelete);
list2.setOnItemClickListener(onListClick);
}
catch (Exception e)
{
Log.e("ERROR", "ERROR IN CODE: " + e.toString());
e.printStackTrace();
}
}
@Override
public void onDestroy() {
super.onDestroy();
helper2.close();
}
private View.OnClickListener onSave=new View.OnClickListener() {
@SuppressWarnings("deprecation")
public void onClick(View v) {
Log.i(TAG,"You passed through the save method");
if (noteId2==null) {
helper2.insert(editNote2.getText().toString(),editNote3.getText().toString());
}
else{
helper2.update(noteId2, editNote2.getText().toString(),editNote3.getText().toString());
noteId2=null;
}
dataset_cursor.requery();
editNote2.setText("");
}
};
private View.OnClickListener onDelete=new View.OnClickListener() {
@SuppressWarnings("deprecation")
public void onClick(View v) {
if (noteId2==null) {
return;
}
else{
helper2.delete(noteId2);
noteId2=null;
}
dataset_cursor.requery();
editNote2.setText("");
}
};
private AdapterView.OnItemClickListener onListClick=new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent,
View view, int position,
long id2)
{
noteId2 =String.valueOf(id2);
Cursor c=helper2.getById(noteId2);
c.moveToFirst();
editNote2.setText(helper2.getNote(c));
}
};
class NoteAdapter extends CursorAdapter {
@SuppressWarnings("deprecation")
NoteAdapter(Cursor c) {
super(View_races.this, c);
}
@Override
public void bindView(View row, Context ctxt,Cursor c) {
NoteHolder2 holder=(NoteHolder2)row.getTag();
holder.populateFrom(c, helper2);
}
@Override
public View newView(Context ctxt, Cursor c,ViewGroup parent) {
LayoutInflater inflater=getLayoutInflater();
View row=inflater.inflate(R.layout.row2, parent, false);
NoteHolder2 holder=new NoteHolder2(row);
row.setTag(holder);
return(row);
}
}
static class NoteHolder2 {
private TextView noteText2=null;
NoteHolder2(View row) {
noteText2=(TextView)row.findViewById(R.id.note2);
}
void populateFrom(Cursor c, RaceHelper helper) {
noteText2.setText(helper.getNote(c));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_view_races, menu);
return true;}
//Button Method to return to the main Menu
public void Menu(View v){
Intent intent = new Intent(this, MainMenuActivity.class);
startActivity(intent);
}
//Button Method to go to the Race Activity
public void Races(View v){
Intent intent = new Intent(this, UpComingRaceActivity.class);
startActivity(intent);
}
}
// RaceHelper java code
package com.CIS2818.tritracker;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
class RaceHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME="Races.db";
private static final int SCHEMA_VERSION=2;
String TAG = "INFORMATION";
public RaceHelper(Context context) {
super(context, DATABASE_NAME, null, SCHEMA_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE Races (_id INTEGER PRIMARY KEY AUTOINCREMENT, note TEXT, date TEXT);");
Log.i(TAG, "You are in the creation of db");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public void insert(String note, String date) {
ContentValues cv=new ContentValues();
cv.put("note", note);
getWritableDatabase().insert("Races", "note", cv);
Log.i(TAG, "You have succesfully inserted into the db");
}
public void update(String id, String note, String date) {
ContentValues cv=new ContentValues();
String[] args={id};
cv.put("note", note);
getWritableDatabase().update("Races", cv, "_id=?", args);
}
public void delete(String id) {
getWritableDatabase().delete("Races", "_id=?", new String[] {id});
}
public Cursor getAll() {
return(getReadableDatabase()
.rawQuery("SELECT _id, note FROM Races, date FROM Races",
null));
}
public String getNote(Cursor c) {
return(c.getString(1));
}
public Cursor getById(String id) {
String[] args={id};
return(getReadableDatabase()
.rawQuery("SELECT _id, note FROM Races WHERE _id=?",
args));
}