Android 未在SQLITE数据库中插入数据
我想在数据库表中插入一些值。logcat中没有错误,但表中仍然没有插入值。我无法确定问题所在 这是数据库类。 FoodieDatabase.javaAndroid 未在SQLITE数据库中插入数据,android,database,android-sqlite,Android,Database,Android Sqlite,我想在数据库表中插入一些值。logcat中没有错误,但表中仍然没有插入值。我无法确定问题所在 这是数据库类。 FoodieDatabase.java public class FoodieDatabase extends SQLiteOpenHelper { public String DATABASE_CREATE = "create table " + TableData.TableInfo.TABLE_NAME + "("
public class FoodieDatabase extends SQLiteOpenHelper {
public String DATABASE_CREATE = "create table "
+ TableData.TableInfo.TABLE_NAME + "("
+ TableData.TableInfo.COLUMN_ID + " INTEGER primary key ,"
+ TableData.TableInfo.COLUMN_hostel + " TEXT not null,"
+ TableData.TableInfo.COLUMN_weekday + " TEXT not null,"
+ TableData.TableInfo.COLUMN_category + " TEXT not null,"
+ TableData.TableInfo.COLUMN_food + " TEXT not null,"
+ TableData.TableInfo.COLUMN_rate + " TEXT not null" + ")";
private static final int DATABASE_VERSION = 1;
// Database creation sql statement
public FoodieDatabase(Context context) {
super(context, TableData.TableInfo.DATABASE_NAME, null, DATABASE_VERSION);
Log.w("FoodieDatabase","Database Created");
}
@Override
public void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
Log.w(FoodieDatabase.class.getName(),
" Table " + TableData.TableInfo.TABLE_NAME + " Successfully created. "
);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public void insertvalues(FoodieDatabase fdb, Integer id, String hostel,
String weekday, String category, String food , String rate ){
SQLiteDatabase sdb = fdb.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(TableData.TableInfo.COLUMN_ID,id);
cv.put(TableData.TableInfo.COLUMN_hostel,hostel );
cv.put(TableData.TableInfo.COLUMN_weekday,weekday );
cv.put(TableData.TableInfo.COLUMN_category,category );
cv.put(TableData.TableInfo.COLUMN_food,food );
cv.put(TableData.TableInfo.COLUMN_rate,rate );
sdb.insert(TableData.TableInfo.TABLE_NAME, null, cv);
}
public Cursor retrievevalues(FoodieDatabase fdb){
SQLiteDatabase sq = fdb.getReadableDatabase();
String[] columns = {TableData.TableInfo.COLUMN_ID,
TableData.TableInfo.COLUMN_hostel,
TableData.TableInfo.COLUMN_weekday,
TableData.TableInfo.COLUMN_category,
TableData.TableInfo.COLUMN_food,
TableData.TableInfo.COLUMN_rate};
Cursor CR = sq.query(TableData.TableInfo.TABLE_NAME,columns,null,null,null,null,null);
return CR;
}
}
public class InsertData extends AppCompatActivity {
com.rengwuxian.materialedittext.MaterialEditText sno;
com.rengwuxian.materialedittext.MaterialEditText hostel;
com.rengwuxian.materialedittext.MaterialEditText category;
com.rengwuxian.materialedittext.MaterialEditText food;
com.rengwuxian.materialedittext.MaterialEditText weekday;
com.rengwuxian.materialedittext.MaterialEditText rate;
Button insert;
String Shostel;
String Scategory;
String Sfood;
String Sweekday;
String Srate;
Integer Isno;
Context context= this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_insert_data);
sno = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.sno);
sno.setText("1");
hostel = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.hostel);
category = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.category);
food = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.food);
weekday = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.weekday);
rate = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.rate);
insert = (Button) findViewById(R.id.insert);
Isno = Integer.parseInt(sno.getText().toString());
Shostel = hostel.getText().toString();
Scategory = category.getText().toString();
Sfood = food.getText().toString();
Sweekday = weekday.getText().toString();
Srate = rate.getText().toString();
insert.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FoodieDatabase fdb = new FoodieDatabase(context);
fdb.insertvalues(fdb,Isno,Shostel,Sweekday,Scategory,Sfood,Srate);
Toast.makeText(InsertData.this,"Value No." + Isno + Shostel + Scategory + "inserted successfully.",Toast.LENGTH_LONG).show();
Intent intent = new Intent(InsertData.this, Home.class);
InsertData.this.startActivity(intent);
finish();
}
});
}
InsertData.java
public class FoodieDatabase extends SQLiteOpenHelper {
public String DATABASE_CREATE = "create table "
+ TableData.TableInfo.TABLE_NAME + "("
+ TableData.TableInfo.COLUMN_ID + " INTEGER primary key ,"
+ TableData.TableInfo.COLUMN_hostel + " TEXT not null,"
+ TableData.TableInfo.COLUMN_weekday + " TEXT not null,"
+ TableData.TableInfo.COLUMN_category + " TEXT not null,"
+ TableData.TableInfo.COLUMN_food + " TEXT not null,"
+ TableData.TableInfo.COLUMN_rate + " TEXT not null" + ")";
private static final int DATABASE_VERSION = 1;
// Database creation sql statement
public FoodieDatabase(Context context) {
super(context, TableData.TableInfo.DATABASE_NAME, null, DATABASE_VERSION);
Log.w("FoodieDatabase","Database Created");
}
@Override
public void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
Log.w(FoodieDatabase.class.getName(),
" Table " + TableData.TableInfo.TABLE_NAME + " Successfully created. "
);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public void insertvalues(FoodieDatabase fdb, Integer id, String hostel,
String weekday, String category, String food , String rate ){
SQLiteDatabase sdb = fdb.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(TableData.TableInfo.COLUMN_ID,id);
cv.put(TableData.TableInfo.COLUMN_hostel,hostel );
cv.put(TableData.TableInfo.COLUMN_weekday,weekday );
cv.put(TableData.TableInfo.COLUMN_category,category );
cv.put(TableData.TableInfo.COLUMN_food,food );
cv.put(TableData.TableInfo.COLUMN_rate,rate );
sdb.insert(TableData.TableInfo.TABLE_NAME, null, cv);
}
public Cursor retrievevalues(FoodieDatabase fdb){
SQLiteDatabase sq = fdb.getReadableDatabase();
String[] columns = {TableData.TableInfo.COLUMN_ID,
TableData.TableInfo.COLUMN_hostel,
TableData.TableInfo.COLUMN_weekday,
TableData.TableInfo.COLUMN_category,
TableData.TableInfo.COLUMN_food,
TableData.TableInfo.COLUMN_rate};
Cursor CR = sq.query(TableData.TableInfo.TABLE_NAME,columns,null,null,null,null,null);
return CR;
}
}
public class InsertData extends AppCompatActivity {
com.rengwuxian.materialedittext.MaterialEditText sno;
com.rengwuxian.materialedittext.MaterialEditText hostel;
com.rengwuxian.materialedittext.MaterialEditText category;
com.rengwuxian.materialedittext.MaterialEditText food;
com.rengwuxian.materialedittext.MaterialEditText weekday;
com.rengwuxian.materialedittext.MaterialEditText rate;
Button insert;
String Shostel;
String Scategory;
String Sfood;
String Sweekday;
String Srate;
Integer Isno;
Context context= this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_insert_data);
sno = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.sno);
sno.setText("1");
hostel = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.hostel);
category = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.category);
food = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.food);
weekday = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.weekday);
rate = (com.rengwuxian.materialedittext.MaterialEditText) findViewById(R.id.rate);
insert = (Button) findViewById(R.id.insert);
Isno = Integer.parseInt(sno.getText().toString());
Shostel = hostel.getText().toString();
Scategory = category.getText().toString();
Sfood = food.getText().toString();
Sweekday = weekday.getText().toString();
Srate = rate.getText().toString();
insert.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FoodieDatabase fdb = new FoodieDatabase(context);
fdb.insertvalues(fdb,Isno,Shostel,Sweekday,Scategory,Sfood,Srate);
Toast.makeText(InsertData.this,"Value No." + Isno + Shostel + Scategory + "inserted successfully.",Toast.LENGTH_LONG).show();
Intent intent = new Intent(InsertData.this, Home.class);
InsertData.this.startActivity(intent);
finish();
}
});
}
在InsertData.java文件中,我使用Toast检查像这样的值是否为no
,Shostel
,Scategory
Shostel
,Scategory
值在toast中为空。我的意思是它们是空白的,没有显示任何内容。而Isno
总是显示我在editText
中最初设置的1
。
如果你需要更多的细节,一定要告诉我。提前谢谢 您在用户看到UI之前就存储了这些值。您应该在单击后将编辑文本中的值放入--
为什么你会得出结论,没有插入任何内容,这到底是什么意思?你的桌子还是空的,还是你的结论基于你的吐司中的价值观?您没有从数据库中检索ValueYes,因此如何确保没有插入任何内容