我正在尝试使用parse.com后端开发填字游戏到sqlite支持。我很难转换代码。 以下代码是我创建的数据库表。
<img src="imageURLHere.jpg">
我想在sqlite中使用以下代码：我试过但是它显示了一些错误，请帮助我！
public class puzzle extends SQLiteOpenHelper {
public static final String db_name = "crossword.db";
public static final String Table1_name = "puz";
public static final String Table2_name = "item";
public static final String Table3_name = "clue";
public puzzle(final Context context){
super(context, db_name, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE IF NOT EXISTS" + Table1_name + "hash INTEGER, title TEXT, author TEXT,copyright TEXT,height INTEGER ,width INTEGER");
db.execSQL("CREATE TABLE IF NOT EXISTS"+ Table2_name + "hash INTEGER, x INTEGER ,y INTEGER, cell position INTEGER , black BOOLEAN , letter TEXT");
db.execSQL("CREATE TABLE IF NOT EXISTS" + Table3_name + "hash INTEGER, x INTEGER ,y INTEGER, cellposition INTEGER, cluenumber INTEGER, position INTEGER,clue TEXT");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS" + Table1_name);
db.execSQL("DROP TABLE IF EXISTS" + Table2_name);
db.execSQL("DROP TABLE IF EXISTS" + Table3_name);
onCreate(db);
}
public boolean insertitem(int hash, int x, int y, int cellposition, boolean black, String letter) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues itemvalues = new ContentValues();
itemvalues.put("hash", hash);
itemvalues.put("X", x);
itemvalues.put("Y", y);
itemvalues.put("CellPosition", cellposition);
itemvalues.put("Black", black);
itemvalues.put("Letter", letter);
long itemresult = db.insert(Table2_name, null, itemvalues);
if (itemresult == -1)
return false;
else
return true;
}
public boolean isinsertpuz(int hash,String title,String author,String copyright,int height,int width)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues puzvalues = new ContentValues();
puzvalues.put("hash",hash);
puzvalues.put("Title",title);
puzvalues.put("author",author);
puzvalues.put("copyright",copyright);
puzvalues.put("Height",height);
puzvalues.put("Width",width);
long puzresult = db.insert(Table1_name, null, puzvalues);
if (puzresult == -1)
return false;
else
return true;
}
public boolean isinsertclue(int hash,int x,int y,int cellposition,int cluenumber,String clue)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues cluevalues = new ContentValues();
cluevalues.put("hash",hash);
cluevalues.put("X",x);
cluevalues.put("Y",y);
cluevalues.put("Cellposition",cellposition);
cluevalues.put("Cluenumber",cluenumber);
cluevalues.put("Clue",clue);
long clueresult=db.insert(Table3_name,null,cluevalues);
if(clueresult==-1)
return false;
else
return true;
}
public Cursor getpuzdata()
{
SQLiteDatabase db = this.getWritableDatabase();
Cursor puzquery=db.rawQuery("select * from" +Table1_name,null);
return puzquery;
}}
}
以下代码是我尝试将代码从parse.com更改为sqlite
的方式public CustomAdapter(Context context, int screenWidth, final int width,int screenHeight, int height, int hash, TextView clueTextView, TextView titleTextView){
this.context = context;
this.width = width;
this.height = height;
this.screenHeight = screenHeight;
this.screenWidth = screenWidth;
activity = (Activity)context;
this.hash = hash;
this.clueTextView = clueTextView;
this.titleTextView = titleTextView;
clueNumber = 0;
//cell count
count = width*height;
//to store each cell view
view = new View[count];
//contains solution
letterChar = new char[count];
clueAcross = new HashMap<>();
clueDown = new HashMap<>();
Log.d("parseSize", String.valueOf(letterChar.length));
//fetch data saved locally
query = ParseQuery.getQuery("Item").fromLocalDatastore();
query.whereEqualTo("hash", hash);
query.orderByAscending("cellPosition");
query.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> objects, ParseException e) {
if(e == null)
for (ParseObject parseObject : objects) {
if(parseObject.getString("letter").equals(""))
letterChar[parseObject.getInt("cellPosition")] = ' ';
else
letterChar[parseObject.getInt("cellPosition")] = parseObject.getString("letter").charAt(0);
}
ParseQuery.getQuery("Clue").fromLocalDatastore().whereEqualTo("hash", CustomAdapter.this.hash).orderByDescending("clueNumber").getFirstInBackground(new GetCallback<ParseObject>() {
@Override
public void done(ParseObject object, ParseException e) {
if(e == null)
clueSize = object.getInt("clueNumber");
Log.d("clueNumber", String.valueOf(clueSize));
}
});
ParseQuery.getQuery("Clue").fromLocalDatastore().whereEqualTo("hash", CustomAdapter.this.hash).orderByAscending("cellPosition").findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> objects, ParseException e) {
if (e == null)
for (ParseObject object : objects) {
//int pos = (object.getInt("y")*width)+object.getInt("x");
if(object.getString("position").equals("Hor"))
clueAcross.put(object.getInt("cellPosition"), object.getString("clue"));
else
clueDown.put(object.getInt("cellPosition"), object.getString("clue"));
Log.d("clue", object.getInt("cellPosition")+" "+object.getString("clue")+" "+object.getString("position"));
}
//will populate the griview
Game.gridView.setAdapter(Game.customAdapter);
//to adjust layout on keyboard up
activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);
//dismiss progress dialog on UI thread
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
Game.progress.dismiss();
}
});
}
});
}
});
//to fix clueNumber change on minimize and restore bug
if(clueNumber > clueSize)
clueNumber = 0;
}
@Override
public int getCount() {
return count;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
view[position] = convertView;
if(view[position] == null){
LayoutInflater layoutInflater = LayoutInflater.from(context);
view[position] = layoutInflater.inflate(R.layout.grid_cell, null);
view[position].setLayoutParams(new RelativeLayout.LayoutParams(screenWidth / width, screenHeight / height));
}
//to shade black on cells containing no letters
view[position].setBackgroundResource(R.drawable.shape);
TextView cellNumberTextView = (TextView)view[position].findViewById(R.id.cellNumber);
final EditText letter = (EditText)view[position].findViewById(R.id.letter);
/*letter.setCursorVisible(false);
letter.setClickable(false);
letter.setLongClickable(false);
letter.setFocusable(false);
letter.setSelected(false);
letter.setKeyListener(null);
letter.setBackgroundResource(android.R.color.transparent);*/
//letter.setText(Character.toString(letterChar[position]));
// cellNumberTextView.setTextSize(cellNumberTextView.getTextSize() / 1.5f);
//set clue number on cells
if(clueAcross.get(position) != null){
cellNumberTextView.setText(String.valueOf(clueNumber));
clueNumber++;
//to fix clueNumber change on minimize and restore bug
if(clueNumber > clueSize)
clueNumber = 0;
Log.d("clueNumber", position+" "+clueNumber+ " "+clueSize);
}
else if(clueDown.get(position) != null){
cellNumberTextView.setText(String.valueOf(clueNumber));
clueNumber++;
//to fix clueNumber change on minimize and restore bug
if(clueNumber > clueSize)
clueNumber = 0;
Log.d("clueNumber", position+" "+clueNumber+ " "+clueSize);
}
//to disable EditText operations on black cells
if(letterChar[position] == ' ') {
view[position].setBackgroundColor(Color.BLACK);
letter.setClickable(false);
letter.setLongClickable(false);
letter.setFocusable(false);
letter.setSelected(false);
letter.setKeyListener(null);
}else
view[position].setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//update clues on view click
clueTextView.setText(getClueDown(position));
titleTextView.setText(getClueAcross(position));
//to open keyboard and focus on the letter to edit
letter.requestFocus();
letter.setCursorVisible(true);
((InputMethodManager)context.getSystemService(Context.INPUT_METHOD_SERVICE)).showSoftInput(letter, InputMethodManager.SHOW_IMPLICIT);
}
});
//update clues on letter click
letter.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if(hasFocus){
letter.setText("");
clueTextView.setText(getClueDown(position));
titleTextView.setText(getClueAcross(position));
}
}
});
//check value and change color of cell accordingly
letter.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//letter.setText(s.toString().toUpperCase());
if(s.toString().isEmpty())
return;
Log.d("letter", "input "+s.toString()+"position "+String.valueOf(position)+Character.toString(letterChar[position]));
if (s.toString().equals(Character.toString(letterChar[position]))) {
view[position].setBackgroundResource(R.drawable.correct);
focusNext(position);
}
else
view[position].setBackgroundResource(R.drawable.wrong);
}
@Override
public void afterTextChanged(Editable s) {
/* if(s.toString().isEmpty())
return;*/
//view[0].setBackgroundResource(R.drawable.correct);
}
});
return view[position];
}
//to focus next cell
public void focusNext(int position) {
for (int i = position; i < count; i++) {
if (letterChar[i+1] == ' ')
continue;
else {
EditText editText = (EditText) ((ViewGroup) view[i + 1]).getChildAt(0);
editText.requestFocus();
((InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE)).showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
return;
}
}
}
//get ACROSS clue based on position
public String getClueAcross(int position){
for(int i=position; i>=0; i--)
if(clueAcross.get(i) != null)
return "(across): "+clueAcross.get(i);
return "";
}
//get DOWN clue based on position
public String getClueDown(int position){
for(int i=position; i>=0; i-=width)
if(clueDown.get(i) != null)
return "(down): "+clueDown.get(i);
return "";
}
@Override
public Object getItem(int position) {
return view[position];
}
@Override
public long getItemId(int position) {
return position;
}
} 这是我从parse转换为sqlite的代码，但是当我构建项目时，它仍保持不变。
答案 0 :(得分：1)
我不确定这是否会对您有所帮助，但您的代码中存在SQL语法错误：
db.execSQL("CREATE TABLE IF NOT EXISTS " + Table1_name + " (hash INTEGER, title TEXT, author TEXT,copyright TEXT,height INTEGER ,width INTEGER)");
db.execSQL("CREATE TABLE IF NOT EXISTS "+ Table2_name + " (hash INTEGER, x INTEGER ,y INTEGER, cell position INTEGER , black BOOLEAN , letter TEXT)");
db.execSQL("CREATE TABLE IF NOT EXISTS " + Table3_name + " (hash INTEGER, x INTEGER ,y INTEGER, cellposition INTEGER, cluenumber INTEGER, position INTEGER,clue TEXT)");
您在"("之前错过了"hash"，在每个陈述结束时"EXISTS"和")"之后的空格