我在db中创建了2个表。 1工作正常。 TABLE_NAME2在创建时出错。
DatabaseHelper.java:
public class DatabaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "abc.db";
public static final String TABLE_NAME1 = "table1";
public static final String COL2 = "col1";
public static final String COL3 = "Date";
public static final String COL4 = "Cost";
public static final String COL5 = "loc1";
public static final String COL6 = "loc2";
public static final String COL7 = "Description";
public static final String TABLE_NAME2 = "signup";
public static final String USER_NAME = "NAME";
public static final String USER_EMAIL = "EMAIL";
public static final String USER_MOBILE = "MOBILE";
public static final String USER_PASS = "PASSWORD";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
}@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE " + TABLE_NAME2 + "("
+ USER_NAME + "TEXT,"
+ USER_EMAIL + "TEXT,"
+ USER_MOBILE + "TEXT, "
+ USER_PASS + "TEXT)");
db.execSQL("CREATE Table " + TABLE_NAME1 + "("// + COL1 + " INTEGER PRIMARY KEY AUTOINCREMENT,"
+ COL2 + " TEXT,"
+ COL3 + " TEXT,"
+ COL4 + " TEXT,"
+ COL5 + " TEXT,"
+ COL6 + " TEXT,"
+ COL7 + " TEXT)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " +TABLE_NAME1);
db.execSQL("DROP TABLE IF EXISTS " +TABLE_NAME2);
onCreate(db);
}
public boolean insertHomeDataDB(String locName, String date, String cost, String startLoc, String endLoc, String description){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(COL2, locName);
contentValues.put(COL3, date);
contentValues.put(COL4, cost);
contentValues.put(COL5, startLoc);
contentValues.put(COL6, endLoc);
contentValues.put(COL7, description);
//contentValues.put(COL8, userId);
long result = db.insert(TABLE_NAME1, null, contentValues);
if (result==-1){
return false;
}
else
return true;
}
public boolean insertSignupDataDB(String name, String email, String mobile, String pass){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(USER_NAME, name);
contentValues.put(USER_EMAIL, email);
contentValues.put(USER_MOBILE, mobile);
contentValues.put(USER_PASS, pass);
long result = db.insert(TABLE_NAME2, null, contentValues);
if (result==-1){
return false;
}
else
return true;
}
public Cursor getAllHomeData(SQLiteDatabase db){
Cursor res;
String[] projection = {COL2,COL3,COL4};
res = db.query(TABLE_NAME1,projection,null,null,null,null,null);
return res;
}
public Cursor getAllProfileData(SQLiteDatabase db){
Cursor res;
String[] projection={USER_NAME,USER_EMAIL,USER_MOBILE,USER_PASS};
res = db.query(TABLE_NAME2, projection,null,null,null,null,null);
return res;
}
}
在此页面中,我将数据发送到DatabaseHelper Class以插入数据。它显示了toast"成功注册",但在Logs中显示错误,并且它也没有导航到LoginActivity类。它正在导航到MainActivity。即使是其他部分也不起作用。当我输入不同的密码时,它会让错误的应用停止。
if(etSignPass.getText().toString().equals(etSignConPass.getText().toString())){
boolean queryResult = dbHelper.insertSignupDataDB(etSignName.getText().toString(),
etSignEmail.getText().toString(), etSignMobile.getText().toString(), etSignPass.getText().toString());
if(queryResult=true){
Toast.makeText(SignUp.this, "Successfully Signed up", Toast.LENGTH_SHORT).show();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
navigateUpTo(new Intent(SignUp.this,LoginActivity.class));
}
}
else{
Toast.makeText(SignUp.this, "Error", Toast.LENGTH_SHORT).show();
}
}
else{
etSignConPass.setBackgroundColor(Color.RED);
onClicSignUp();
}
}
答案 0 :(得分:1)
db.execSQL("CREATE TABLE " + TABLE_NAME2 + "(" + USER_NAME + "TEXT," + USER_EMAIL + "TEXT," + USER_MOBILE + "TEXT, " + USER_PASS + "TEXT)"); db.execSQL("CREATE Table " + TABLE_NAME1 + "("// + COL1 + " INTEGER PRIMARY KEY AUTOINCREMENT," + COL2 + " TEXT," + COL3 + " TEXT," + COL4 + " TEXT," + COL5 + " TEXT," + COL6 + " TEXT," + COL7 + " TEXT)");
在运行创建表2和表1的SQL之间存在非常重要的区别。在创建表1时,SQL的格式为CREATE TABLE table1 (col1 TEXT, ...
但是,在创建表2时,您缺少列名与TEXT
之间的空格。为"TEXT"
字符串文字添加空格,或者更好,如果可用,请使用预准备语句。