主activity报空指针异常java.lang.RuntimeException: Unable to resume activity

主activity   报空指针异常

java.lang.RuntimeException: Unable to resume activity {com.click369.test/com.click369.test.jzactivity.TallyToolActivity}: java.lang.NullPointerException

问题原因是

setAdapter(asapter);为空     有一种情况是id重复

主activity  包含的fragment的listview为空导致

原被 包含的fragment的onCreateView代码

public class RuzhangFragment extends Fragment{
private ListView rulistView1 = null;//收入界面的listview
private List ruzhanglist = null;// 记录消息集合

public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {

View ruzhangView=inflater.inflate(R.layout.ruzhanglist_layout, null, false);
return ruzhangView;

}

}

修改后    

public class RuzhangFragment extends Fragment{

private ListView rulistView1 = null;//收入界面的listview
private List ruzhanglist = null;// 记录消息集合

public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View ruzhangView=inflater.inflate(R.layout.ruzhanglist_layout, null, false);
//进入之后显示收入账单 有内容显示的Listview。
rulistView1=(ListView)ruzhangView.findViewById(R.id.rulistView1);
return ruzhangView;
}

}