我是android平台的新手。我正在开展一个项目，我必须在一个活动上制作一个带有两个日历界面的共享日历。用户可以使用事件标题，事件时间，余数，描述，来往等事件详细信息保存事件。我已经在android网站上给出了记事本教程。我使用相同的模式制作了应用程序。但我无法找到错误。每次我运行我的代码SQLite异常错误代码1命中。我已经花了20多个小时但却找不到任何解决方案。我也试过调试它但根本没用。请帮我解决这个错误。这将是一个很大的帮助。提前谢谢大家。
这是我试图插入数据库的地方
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class MyListView extends ListActivity {
int j=0;
private EventsDbAdapter mDbHelper;
private Cursor EventsCursor;
static final String[] hours = new String[]{
"00:00",
"01:00",
"02:00",
"03:00",
"04:00",
"05:00",
"06:00",
"07:00",
"08:00",
"09:00",
"10:00",
"11:00",
"12:00",
"13:00",
"14:00",
"15:00",
"16:00",
"17:00",
"18:00",
"19:00",
"20:00",
"21:00",
"22:00",
"23:00"
};
private int pos=0;
private int ACTIVITY_CREATE=0;
private ArrayAdapter<String> ar;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ar = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, hours);
setListAdapter(ar);
getListView().setTextFilterEnabled(true);
mDbHelper = new EventsDbAdapter(this);
mDbHelper.open();
}
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
pos = position;
String str = this.getListAdapter().getItem(position).toString();
if(str.length()<6)
{
Intent myIntent = new Intent(MyListView.this, event.class);
MyListView.this.startActivityForResult(myIntent,0);
}
else
{
Cursor c = EventsCursor;
EventsCursor=mDbHelper.fetchAllNotes();
startManagingCursor(EventsCursor);
// Create an array to specify the fields we want to display in the list (only TITLE)
String[] from = new String[]{EventsDbAdapter.KEY_TITLE};
c.moveToPosition(position);
Intent i = new Intent(this, event.class);
i.putExtra(EventsDbAdapter.KEY_ROWID, id);
i.putExtra(EventsDbAdapter.KEY_TITLE, c.getString(c.getColumnIndexOrThrow(EventsDbAdapter.KEY_TITLE)));
i.putExtra(EventsDbAdapter.KEY_TO, c.getString(c.getColumnIndexOrThrow(EventsDbAdapter.KEY_TO)));
i.putExtra(EventsDbAdapter.KEY_FROM, c.getString(c.getColumnIndexOrThrow(EventsDbAdapter.KEY_FROM)));
i.putExtra(EventsDbAdapter.KEY_DESCRIPTION, c.getString(c.getColumnIndexOrThrow(EventsDbAdapter.KEY_DESCRIPTION)));
startActivityForResult(i, 1);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
Bundle extras = intent.getExtras();
if(requestCode==0 && resultCode==-1)
{
String title = extras.getString(EventsDbAdapter.KEY_TITLE);
String to = extras.getString(EventsDbAdapter.KEY_TO);
String from = extras.getString(EventsDbAdapter.KEY_FROM);
String description = extras.getString(EventsDbAdapter.KEY_DESCRIPTION);
mDbHelper.createEvent(title, to,from,description);
hours[pos]=hours[pos]+title;
ar.notifyDataSetChanged();
}
else if(requestCode==1)
{
Long rowId = extras.getLong(EventsDbAdapter.KEY_ROWID);
if (rowId != null) {
String editTitle = extras.getString(EventsDbAdapter.KEY_TITLE);
String to = extras.getString(EventsDbAdapter.KEY_TO);
String from = extras.getString(EventsDbAdapter.KEY_FROM);
String description = extras.getString(EventsDbAdapter.KEY_DESCRIPTION);
mDbHelper.updateEvent(rowId, editTitle, to,from,description);
hours[pos]=hours[pos]+editTitle;
ar.notifyDataSetChanged();
}
}
}
}
`
public class EventsDbAdapter
{
public static final String KEY_TITLE = "title";
public static final String KEY_TO = "tochecking";
public static final String KEY_FROM = "fromchecking";
public static final String KEY_DESCRIPTION = "description";
public static final String KEY_ROWID = "_id";
private static final String TAG = "EventsDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
/**
* Database creation sql statement
*/
private static final String DATABASE_CREATE =
" create table " + " DATABASE_TABLE " + " ("
+ KEY_ROWID + " integer primary key autoincrement, "
+ KEY_TITLE + " text not null, "
+ KEY_TO + " text not null, "
+ KEY_FROM + " text not null,"+KEY_DESCRIPTION+" text not null);";
private static final String DATABASE_NAME = "data";
private static final String DATABASE_TABLE = "events";
private static final int DATABASE_VERSION = 2;
private final Context mCtx;
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
System.out.print("testing");
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS notes");
onCreate(db);
}
}
/**
* Constructor - takes the context to allow the database to be
* opened/created
*
* @param ctx the Context within which to work
*/
public EventsDbAdapter(Context ctx) {
this.mCtx = ctx;
}
/**
* Open the notes database. If it cannot be opened, try to create a new
* instance of the database. If it cannot be created, throw an exception to
* signal the failure
*
* @return this (self reference, allowing this to be chained in an
* initialization call)
* @throws SQLException if the database could be neither opened or created
*/
public EventsDbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb =mDbHelper.getWritableDatabase();
return this;
}
public void close() {
mDbHelper.close();
}
/**
* Create a new note using the title and body provided. If the note is
* successfully created return the new rowId for that note, otherwise return
* a -1 to indicate failure.
*
* @param title the title of the note
* @param body the body of the note
* @return rowId or -1 if failed
*/
public long createEvent(String title, String to , String from , String description) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TITLE, title);
initialValues.put(KEY_TO, to);
initialValues.put(KEY_FROM, from);
initialValues.put(KEY_DESCRIPTION, description);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
/**
* Delete the note with the given rowId
*
* @param rowId id of note to delete
* @return true if deleted, false otherwise
*/
public boolean deleteNote(long rowId) {
return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}
/**
* Return a Cursor over the list of all notes in the database
*
* @return Cursor over all notes
*/
public Cursor fetchAllNotes() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_TITLE,KEY_TO,KEY_FROM,
KEY_DESCRIPTION}, null, null, null, null, null);
}
/**
* Return a Cursor positioned at the note that matches the given rowId
*
* @param rowId id of note to retrieve
* @return Cursor positioned to matching note, if found
* @throws SQLException if note could not be found/retrieved
*/
public Cursor fetchEvent(long rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID, KEY_TITLE,KEY_TO,KEY_FROM,
KEY_DESCRIPTION}, KEY_ROWID + "=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
/**
* Update the note using the details provided. The note to be updated is
* specified using the rowId, and it is altered to use the title and body
* values passed in
*
* @param rowId id of note to update
* @param title value to set note title to
* @param body value to set note body to
* @return true if the note was successfully updated, false otherwise
*/
public boolean updateEvent(long rowId, String title, String to ,String from,String description) {
ContentValues args = new ContentValues();
args.put(KEY_TITLE, title);
args.put(KEY_TO, to);
args.put(KEY_FROM, from);
args.put(KEY_DESCRIPTION, description);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
}
}
`
答案 0 :(得分：1)
这是问题吗？
" create table " + " DATABASE_TABLE " + " ("
这里，DATABASE_TABLE是一个字符串，即你发出CREATE TABLE DATABASE_TABLE
稍后您将DATABASE_TABLE变量称为“events”