我正在创建一个数据库并尝试插入和检索值。但是当我尝试插入值时，Logcat上显示以下错误
table Sample没有名为PosY的列（代码1）:,编译时：INSERT INTO Sample（Name，No，PosY，Img，PosX）VALUES（？，？，？，？，？）
这是SQLiteOpenHelper类的代码
公共类SQL扩展了SQLiteOpenHelper {
public static final String DB_NAME="New.db";
public static final String TABLE_NAME="Sample";
public static final int DB_VERSION=1;
public static final String NAME="Name";
public static final String NO="No";
public static final String IMG="Img";
public static final String PIXELX="PosX";
public static final String PIXELY="PosY";
Cursor cur;
byte[] blob;
String name;
String no;
int pixelx,pixely;
Bitmap bmp;
Context ctxt;
private SQLiteDatabase mDb;
public SQL(Context context)
{
super(context,DB_NAME,null,1);
}
public void onCreate(SQLiteDatabase db)
{
db.execSQL("CREATE TABLE "+TABLE_NAME+"("+NAME +" TEXT "+","+ NO +" TEXT PRIMARY KEY ,"+IMG +" BLOB,"+PIXELX +" INTEGER, "+ PIXELY +"INTEGER);");
}
public void onUpgrade(SQLiteDatabase db,int old,int newversion)
{
db.execSQL("DROP TABLE IF EXISTS"+TABLE_NAME+";");
onCreate(db);
}
public void drop(SQLiteDatabase db)
{
db.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME+" ;");
}
public void open(SQLiteDatabase db)
{
db=this.getWritableDatabase();
}
public void close(SQLiteDatabase db)
{
db.close();
}
public void insert(SQLiteDatabase db,String name,String no,byte[] ImgData,int pixelx,int pixely)
{
db=this.getWritableDatabase();
ContentValues con=new ContentValues();
con.put(NAME, name);
con.put(NO, no);
con.put(IMG, ImgData);
con.put(PIXELX, pixelx);
con.put(PIXELY, pixely);
db.insert(TABLE_NAME, null, con);
}
@SuppressLint("NewApi") public User retrieve (SQLiteDatabase db,String name) throws Exception
{
cur=db.query(true,TABLE_NAME, new String[]{NAME,NO,IMG,PIXELX,PIXELY},"NAME="+name+" ", null,null, null,null, null,null);
//cur=db.query(TABLE_NAME, new String[]{IMG},null, null,null, null, null);
if(cur.moveToFirst())
{
name=cur.getString(cur.getColumnIndex(NAME));
no=cur.getString(cur.getColumnIndex(NO));
blob=cur.getBlob(cur.getColumnIndex(IMG));
pixelx=cur.getInt(cur.getColumnIndex(PIXELX));
pixely=cur.getInt(cur.getColumnIndex(PIXELY));
cur.close();
return new User(name,no,Utility.getPhoto(blob),pixelx,pixely);
}
cur.close();
return null;
}
}
我尝试将数据插入数据库的代码是
public class Register extends Activity {
ImageView img;
String picpath;
Bitmap bmp;
Canvas cnvs;
Random r;
int x,y,height,width;
ByteArrayOutputStream blob;
SQL sql;
Paint paint;
String name,no;
Uri data;
SQLiteDatabase db;
String[] filePath={MediaStore.Images.Media.DATA};;
Cursor cur;
TextView txt;
int colIndex;
byte[] imgData;
public Register()
{
}
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
img=(ImageView)findViewById(R.id.imageView1);
sql=new SQL(this);
db=sql.getWritableDatabase();
sql.drop(db);
sql.onCreate(db);
r=new Random();
paint=new Paint();
x=r.nextInt(100);
blob=new ByteArrayOutputStream();
Intent i=getIntent();
name=i.getStringExtra("name");
no=i.getStringExtra("no");
//Open Button
Button open=(Button)findViewById(R.id.button3);
open.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent gal_open=new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(gal_open,1);
}
});
txt=(TextView)findViewById(R.id.textView1);
Button shuffle=(Button)findViewById(R.id.button2);
shuffle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
bmp=Bitmap.createBitmap(img.getHeight(),img.getWidth(),Bitmap.Config.RGB_565);
cnvs=new Canvas(bmp);
height=img.getMeasuredHeight();
width=img.getMeasuredWidth();
x=r.nextInt(height);
y=r.nextInt(width);
paint.setColor(Color.RED);
//data=intentData.getData();
//cur=getContentResolver().query(data,filePath,null,null,null );
//cur.moveToFirst();
//colIndex=cur.getColumnIndex(filePath[0]);
//picpath=cur.getString(colIndex);
//cur.close();
txt.setText(x+","+y);
cnvs.drawBitmap(BitmapFactory.decodeFile(picpath), 0, 0, null);
cnvs.drawRect(x, y,x+20,y+20 , paint);
img.setImageBitmap(bmp);
/*height=img.getMeasuredHeight();
width=img.getWidth();
//Random r=new Random();
x=r.nextInt(width);
y=r.nextInt(height);
cnvs.drawBitmap(BitmapFactory.decodeFile(picpath), 0, 0, null);
cnvs.drawRect(x, y,x+50,y+50 , paint);
img.setImageBitmap(bmp);*/
}
});
Button ok= (Button)findViewById(R.id.button1);
txt=(TextView)findViewById(R.id.textView1);
ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
txt.setText(x+"'"+y);
bmp.compress(CompressFormat.JPEG,100, blob);
imgData=blob.toByteArray();
sql.insert(db,name,no,imgData,x,y);
}
});
}
public void onDraw()
{
}
public void onActivityResult(int requestCode,int resultCode,Intent intentData)
{
super.onActivityResult(requestCode, resultCode, intentData);
if(requestCode==1 && resultCode==RESULT_OK && intentData!=null)
{
bmp=Bitmap.createBitmap(img.getHeight(),img.getWidth(),Bitmap.Config.RGB_565);
cnvs=new Canvas(bmp);
height=img.getMeasuredHeight();
width=img.getMeasuredWidth();
x=r.nextInt(height);
y=r.nextInt(width);
paint.setColor(Color.RED);
data=intentData.getData();
cur=getContentResolver().query(data,filePath,null,null,null );
cur.moveToFirst();
colIndex=cur.getColumnIndex(filePath[0]);
picpath=cur.getString(colIndex);
cur.close();
txt=(TextView)findViewById(R.id.textView1);
txt.setText(x+","+y);
cnvs.drawBitmap(BitmapFactory.decodeFile(picpath), 0, 0, null);
cnvs.drawRect(x, y,x+20,y+20 , paint);
img.setImageBitmap(bmp);
}
}
}
答案 0 :(得分：2)
而不是PIXELY +"INTEGER您需要PIXELY +" INTEGER（缺少空格）
答案 1 :(得分：0)
使用此
db.execSQL("CREATE TABLE "+TABLE_NAME+"("+NAME +" TEXT "+","+ NO +" TEXT PRIMARY KEY ,"+IMG +" BLOB,"+PIXELX +" INTEGER, "+ PIXELY +" INTEGER);");
而不是
db.execSQL("CREATE TABLE "+TABLE_NAME+"("+NAME +" TEXT "+","+ NO +" TEXT PRIMARY KEY ,"+IMG +" BLOB,"+PIXELX +" INTEGER, "+ PIXELY +"INTEGER);");
您错过了在整数类型
之前添加空格