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您好，我有一個與Android SDK 1.6編程問題。我正在做「記事本實例」的相同內容，但是當我嘗試一些查詢時，程序崩潰。如果我嘗試直接在DatabaseHelper create（）metod中執行查詢，它會執行，但是不在此函數中。你有什麼主意嗎？Android SQLite問題：嘗試查詢時程序崩潰！
這是源： public class DbAdapter {
public static final String KEY_NAME = "name";
public static final String KEY_TOT_DAYS = "totdays";
public static final String KEY_ROWID = "_id";
private static final String TAG = "DbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_NAME = "flowratedb";
private static final String DATABASE_TABLE = "girl_data";
private static final String DATABASE_TABLE_2 = "girl_cyle";
private static final int DATABASE_VERSION = 2;
/**
* Database creation sql statement
*/
private static final String DATABASE_CREATE =
"create table "+DATABASE_TABLE+" (id integer, name text not null, totdays int);";
private static final String DATABASE_CREATE_2 =
"create table "+DATABASE_TABLE_2+" (ref_id integer, day long not null);";
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) {
db.execSQL(DATABASE_CREATE);
db.execSQL(DATABASE_CREATE_2);
db.delete(DATABASE_TABLE, null, null);
db.delete(DATABASE_TABLE_2, null, null);
}
@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 "+DATABASE_TABLE);
db.execSQL("DROP TABLE IF EXISTS "+DATABASE_TABLE_2);
onCreate(db);
}
}
public DbAdapter(Context ctx) {
this.mCtx = ctx;
}
public DbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
mDbHelper.close();
}
public long createGirl(int id,String name, int totdays) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_ROWID, id);
initialValues.put(KEY_NAME, name);
initialValues.put(KEY_TOT_DAYS, totdays);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
public long createGirl_fd_day(int refid, long fd) {
ContentValues initialValues = new ContentValues();
initialValues.put("ref_id", refid);
initialValues.put("calendar", fd);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
public boolean updateGirl(int rowId, String name, int totdays) {
ContentValues args = new ContentValues();
args.put(KEY_NAME, name);
args.put(KEY_TOT_DAYS, totdays);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
}
public boolean deleteGirlsData() {
if (mDb.delete(DATABASE_TABLE_2, null, null)>0)
if(mDb.delete(DATABASE_TABLE, null, null)>0)
return true;
return false;
}
public Bundle fetchAllGirls() {
Bundle extras = new Bundle();
Cursor cur = mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_NAME,
KEY_TOT_DAYS}, null, null, null, null, null);
cur.moveToFirst();
int tot = cur.getCount();
extras.putInt("tot", tot);
int index;
for (int i=0;i<tot;i++){
index=cur.getInt(cur.getColumnIndex("_id"));
extras.putString("name"+index, cur.getString(cur.getColumnIndex("name")));
extras.putInt("totdays"+index, cur.getInt(cur.getColumnIndex("totdays")));
}
cur.close();
return extras;
}
public Cursor fetchGirl(int rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
KEY_NAME, KEY_TOT_DAYS}, KEY_ROWID + "=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public Cursor fetchGirlCD(int rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE_2, new String[] {"ref_id",
"day"}, "ref_id=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
}
坦克的 瓦萊里奧從意大利:)
「程序崩潰」是什麼意思？請包括您的LogCat輸出。 – 2010-05-18 12:35:21