In order to facilitate inspection BT_in button I set became serText but still is invalid, each button is useless, I write the code according to the book and Internet I feel no difference but is not achieve them, other don't need to look, I just want to know why BT_in button is invalid?

 
Public class Fragment3 extends fragments {

Private final String TABLENAME="Money_TB"; 
Private EditText ET_in ET_out; 
Private Button BT_in, BT_out BT_re; 
Private SQLiteDatabase db. 
Private TextView Money; 
DBOpenHelper helper; 

Public Fragment3 () {

} 

@ Override 
Public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//TODO Auto - generated method stub 
Return inflater. Inflate (R.l ayout tab03, container, false); 
} 

@ Override 
Public void onActivityCreated (Bundle savedInstanceState) {
//TODO Auto - generated method stub 
Super. OnActivityCreated (savedInstanceState); 

Money=(TextView) getActivity (). The findViewById (R.i d.m oney2); 
Int num=Integer. ParseInt (Money. The getText (), toString ()); 

ET_in=(EditText) getActivity (). The findViewById (R.i d.m oneyin); 
ET_out=(EditText) getActivity (). The findViewById (R.i d.m oneyout); 

Helper=new DBOpenHelper (getActivity ()); 

BT_in=(Button) getActivity (). The findViewById (R.i d.m oneyinb); 
BT_out=(Button) getActivity (). The findViewById (R.i d.m oneyoutb); 
BT_re=(Button) getActivity (). The findViewById (R.i d.r eferesh); 

BT_re. SetOnClickListener (new View. An OnClickListener () {

@ Override 
Public void onClick (View v) {
//TODO Auto - generated method stub 
The db=helper. GetWritableDatabase (); 
The Refresh (); 
} 

Private void Refresh () {
//TODO Auto - generated method stub 
ContentValues values=new ContentValues (); 
Int money1=10000; 
Values. The put (" money ", money1); 
The update (TABLENAME values, null, null); 
} 
}); 

BT_in. SetOnClickListener (new View. An OnClickListener () {

@ Override 
Public void onClick (View v) {
//TODO Auto - generated method stub 
ET_in. SetText (" 123 "); 
} 

Private void In () {
//TODO Auto - generated method stub 

ContentValues values=new ContentValues (); 
String ETIN=ET_in. GetText (). The toString (); 
Int num=Integer. ParseInt (ETIN); 
Values. The put (" money ", num); 
The insert (TABLENAME, null values); 

Cursor Cursor=db. Query (" diary ", null, null, null, null, null, null); 
Money. The setText (num); 
ET_in. SetText (" "); 
} 
}); 
BT_out. SetOnClickListener (new View. An OnClickListener () {

@ Override 
Public void onClick (View arg0) {
//TODO Auto - generated method stub 
The db=helper. GetWritableDatabase (); 
Out (); 
} 

Private void Out () {
//TODO Auto - generated method stub 

} 
}); 
} 
} 

CodePudding user response:

Run time error, not an error, this button is not empty, should be no problem, the problem should be out in your onclick implementation

CodePudding user response:

In that line, debug directly to the setText call didn't see

CodePudding user response:

Write the code in the onViewCreated try

CodePudding user response:

(TextView) getActivity (). The findViewById (R.i d.m oney2); You this is to find the layout of the activity file View, is not a fragment, so all the events are not response,