关于android：为什么没有在数据库中插入值？

Why the values are not being inserted in the database?

我的数据库代码如下所示。

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public void addprofileinfo(HashMap<String, String> queryValues){

SQLiteDatabase database = this.getWritableDatabase();

ContentValues values = new ContentValues();

values.put("StudentName", queryValues.get("StudentName"));
values.put("RegistrationNo", queryValues.get("RegistrationNo"));
values.put("Faculty", queryValues.get("Faculty"));
values.put("TotalFeePaid", queryValues.get("TotalFeePaid"));

database.insert("FEE", null, values);

database.close();

活动代码是：
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.insertfield);
editName=(的EditText)findViewById(R.id.editTextName);
editFaculty=(的EditText)findViewById(R.id.editTextfaculty);
editFee=(的EditText)findViewById(R.id.editTexttotalfeepaid);
editRegid=(的EditText)findViewById(R.id.editTextid);
save =(Button)findViewById(R.id.buttonsave);

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addData();
}

public void addData(){
save.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
try{

HashMap<String, String> queryValuesMap = new HashMap<String, String>();

queryValuesMap.put("StudentName",editName.getText().toString());
queryValuesMap.put("Faculty", editFaculty.getText().toString());
queryValuesMap.put("TotalFee", editFee.getText().toString());
queryValuesMap.put("RegistrationNo", editRegid.getText().toString());

dbtools.addprofileinfo(queryValuesMap);
Toast.makeText(insertData.this,"Successful!!!", Toast.LENGTH_LONG).show();

Intent intent;
intent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
dbtools.close();
insertData.this.finish();

}catch(Exception e){
Toast.makeText(insertData.this, e.getMessage(), Toast.LENGTH_LONG).show();
}}
});

将显示成功保存的消息，但未在数据库中找到该值。请告诉我为什么会这样？

试着把：

1 2	dbtools.close(); insertData.this.finish();

之前：

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Intent intent;
intent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);