为什么Fragment中的按钮写在onActivityCreated中依旧无效？

[Dust__]

为了方便检查BT_in按钮我设置成了serText但是依旧无效，每个按钮都没用，我按照书上和网上写的代码我感觉完全没区别但是就是实现不了。其他不用看，我就想知道为什么BT_in按钮无效？

public class Fragment3 extends Fragment{
	
	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.layout.tab03,container,false);
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onActivityCreated(savedInstanceState);
		
		Money=(TextView)getActivity().findViewById(R.id.money2);
		int num=Integer.parseInt(Money.getText().toString());
		
		ET_in=(EditText)getActivity().findViewById(R.id.moneyin);
		ET_out=(EditText)getActivity().findViewById(R.id.moneyout);
		
		helper = new DBOpenHelper(getActivity());

		BT_in=(Button)getActivity().findViewById(R.id.moneyinb);
		BT_out=(Button)getActivity().findViewById(R.id.moneyoutb);
		BT_re=(Button)getActivity().findViewById(R.id.referesh);
		
		BT_re.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				db = helper.getWritableDatabase();
				Refresh();
			}

			private void Refresh() {
				// TODO Auto-generated method stub
				ContentValues values=new ContentValues();
				int money1=10000;
				values.put("money", money1);
				db.update(TABLENAME, values, null, null);
			}
		});
		
		BT_in.setOnClickListener(new View.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().toString();
				int num=Integer.parseInt(ETIN);
				values.put("money",num);
				db.insert(TABLENAME, null, values);
				
				Cursor cursor= db.query("diary",null,null,null,null,null,null);
				Money.setText(num);
				ET_in.setText(" ");
			}
		});
		BT_out.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				db = helper.getWritableDatabase();
				Out();
			}

			private void Out() {
				// TODO Auto-generated method stub
				
			}
		});
	}
}

[kangweicn]

运行的时候报错了吗，没报错的话，这个button不是空，应该没问题，问题应该出在你onclick里面的实现吧

[유]

把代码写在onViewCreated中试试

[王能]

直接debug 到setText那一行，看看调用没

[zxb3121999]

(TextView)getActivity().findViewById(R.id.money2);你这个是找的activity的布局文件的View，并不是fragment的。所以这些事件都不会响应的。