關於程式碼...我找一天還不知道原因,執行APP時,出現問題
點擊新增紀錄 button 時,它回傳 -1...也就是沒新增成功 = ="
請問程式碼是哪裡可能出錯呢? 謝謝。
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//建立SQLiteOpenHelper物件
dbHelper=new MyDBHelper(this);
db=dbHelper.getWritableDatabase();
//取得TextView物件
output=(TextView)findViewById(R.id.lblOutput);
txtTitle=(EditText)findViewById(R.id.txtTitle);
txtPrice=(EditText)findViewById(R.id.txtPrice);
txtNewPrice=(EditText)findViewById(R.id.txtNewPrice);
}
public void btn1_Click(View view){
long id;
ContentValues cv=new ContentValues();
cv.put("title", txtTitle.getText().toString());;
double price=Double.parseDouble(txtPrice.getText().toString());
cv.put("price", price);;
id=db.insert(DATABASE_TABLE, null, cv);
output.setText("新增記錄成功: "+id);
}