SugarORM在AndroidManifest

Question

我有一個問題：我用SugarORM我的應用程序，並在AndroidManifest我需要設置：

<meta-data android:name="DATABASE" android:value="moneyManager.db" /> 
     <meta-data android:name="VERSION" android:value="1"/> 
     <meta-data android:name="QUERY_LOG" android:value="true"/> 
     <meta-data android:name="DOMAIN_PACKAGE_NAME" android:value="ua.marinovskiy.moneymanager" /> 

這：

android:name="com.orm.SugarApp" 

而現在，當我使用startActivityForResult從適配器L：

Intent intent = new Intent(context, NewOperation.class); 
((Activity) context).startActivityForResult(intent, MainFragment.REQUEST_CODE); 

我借這個錯誤：

java.lang.ClassCastException: com.orm.SugarApp cannot be cast to android.app.Activity 

我的問題：我怎麼能從Manifest文件中刪除這個android：name =「com.orm.SugarApp」或者另一種方法來解決這個問題？

編輯：

public class MainFragment extends Fragment { 

    public final static int REQUEST_CODE = 1; 

    ViewPager viewPager; 
    PagerAdapter viewPagerAdapter; 

    List<List<CategoryParent>> list; 
    List<Integer> balance_list = new ArrayList<>(); 
    List<String> periods_list = new ArrayList<>(); 

    SugarHelper sugarHelper; 

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

     View view = inflater.inflate(R.layout.fragment_main, 
       container, false); 

     sugarHelper = new SugarHelper(); 

     list = sugarHelper.readAllOoerations(MainActivity.type_of_period, MainActivity.min_date, MainActivity.max_date, MainActivity.addedDate, balance_list); 
     periods_list = sugarHelper.getPeriods(); 
     viewPager = (ViewPager) view.findViewById(R.id.pager); 
     viewPagerAdapter = new ViewPagerAdapter(getActivity().getApplicationContext(), list, balance_list, periods_list); 
     viewPager.setAdapter(viewPagerAdapter); 
     viewPager.setCurrentItem(MainActivity.addedDate); 

     return view; 
    } 


    @Override 
    public void onResume() { 
     super.onResume(); 
     list.clear(); 
     list.addAll(sugarHelper.readAllOoerations(MainActivity.type_of_period, MainActivity.min_date, MainActivity.max_date, MainActivity.addedDate, balance_list)); 
     if (!list.isEmpty()) { 
      viewPagerAdapter.notifyDataSetChanged(); 
      viewPager.setAdapter(viewPagerAdapter); 
      viewPager.setCurrentItem(MainActivity.addedDate); 
     } 
    } 

    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     if (resultCode == getActivity().RESULT_OK) { 
      Toast.makeText(getActivity().getApplicationContext(), "done", Toast.LENGTH_SHORT).show(); 
     } else { 
      Toast.makeText(getActivity().getApplicationContext(), "cancel", Toast.LENGTH_SHORT).show(); 
     } 
    } 

} 

而且我ViewPagerAdapter類：

public class ViewPagerAdapter extends PagerAdapter { 

    private OperationsAdapter operationsAdapter; 
    private List<CategoryParent> categoryParentArrayList; 
    private ExpandableListView expandableListView; 

    TextView tv_balance, empty, current_period; 

    Context context; 
    List<List<CategoryParent>> list; 
    List<Integer> balance_list; 
    List<String> periods; 

    LayoutInflater inflater; 

    SugarHelper sugarHelper; 

    public ViewPagerAdapter(Context context, List<List<CategoryParent>> list, List<Integer> balance_list, List<String> periods) { 
     this.context = context; 
     this.list = list; 
     this.balance_list = balance_list; 
     this.periods = periods; 
    } 

    @Override 
    public int getCount() { 
     return list.size(); 
    } 

    @Override 
    public boolean isViewFromObject(View view, Object object) { 
     return view == ((RelativeLayout) object); 
    } 

    @Override 
    public Object instantiateItem(ViewGroup container, int position) { 

     inflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     View view = inflater.inflate(R.layout.viewpager_item, container, 
       false); 

     sugarHelper = new SugarHelper(); 

     tv_balance = (TextView) view.findViewById(R.id.balance_operations); 
     current_period = (TextView) view.findViewById(R.id.current_period); 
     current_period.setText(periods.get(position)); 
     setBalance(balance_list, position); 

     expandableListView = (ExpandableListView) view.findViewById(R.id.expListView); 
     categoryParentArrayList = list.get(position); 

     if (!categoryParentArrayList.isEmpty()) { 

      empty = (TextView) view.findViewById(R.id.if_empty); 
      empty.setVisibility(View.INVISIBLE); 

      operationsAdapter = new OperationsAdapter(context, categoryParentArrayList); 
      expandableListView.setAdapter(operationsAdapter); 

      expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { 
       @Override 
       public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { 

        v.setBackgroundColor(Color.parseColor("#B2EBF2")); 

        Intent intent = new Intent(context, NewOperation.class); 
        MainFragment mainFragment = new MainFragment(); 
        mainFragment.startActivityForResult(intent, MainFragment.REQUEST_CODE); 

        return false; 
       } 
      }); 

      expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() { 
       @Override 
       public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { 

        Toast.makeText(context, "group", Toast.LENGTH_LONG).show(); 

        return false; 
       } 
      }); 
     } 

     ((ViewPager) container).addView(view); 

     return view; 
    } 

    @Override 
    public void destroyItem(ViewGroup container, int position, Object object) { 
     // Remove viewpager_item.xml from ViewPager 
     ((ViewPager) container).removeView((RelativeLayout) object); 

    } 

    public void setBalance(List<Integer> balance_list, int position) { 
     tv_balance.setText("Balance: $" + balance_list.get(position)); 
     if (balance_list.get(position) < 0) { 
      tv_balance.setBackgroundResource(R.drawable.balance_minus_style); 
     } else { 
      tv_balance.setBackgroundResource(R.drawable.balance_plus_style); 
     } 
    } 

和異常：

09-03 14:40:03.915 13091-13091/ua.marinovskiy.moneymanager E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    java.lang.IllegalStateException: Fragment MainFragment{426ee278} not attached to Activity 
      at android.support.v4.app.Fragment.startActivityForResult(Fragment.java:906) 
      at ua.marinovskiy.moneymanager.adapter.ViewPagerAdapter$1.onChildClick(ViewPagerAdapter.java:95) 
      at android.widget.ExpandableListView.handleItemClick(ExpandableListView.java:583) 
      at android.widget.ExpandableListView.performItemClick(ExpandableListView.java:522) 
      at android.widget.AbsListView$PerformClick.run(AbsListView.java:2812) 
      at android.widget.AbsListView$1.run(AbsListView.java:3571) 
      at android.os.Handler.handleCallback(Handler.java:725) 
      at android.os.Handler.dispatchMessage(Handler.java:92) 
      at android.os.Looper.loop(Looper.java:153) 
      at android.app.ActivityThread.main(ActivityThread.java:5297) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:511) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
      at dalvik.system.NativeStart.main(Native Method) 

ua.marinovskiy.moneymanager.adapter.ViewPagerAdapter $ 1.onChildClick（ ViewPagerAdapter.java:95）

at mainFragment.startActivityForResult（intent，MainFragment.REQUEST_CODE）;

解決方案：

我離開 ((Activity) context).startActivityForResult(intent, MainFragment.REQUEST_CODE);和片段的變化，當我打電話適配器getActivity（）getApplicationContext（）上getActivity（）。

Answer 1

您必須在您的清單中指定com.orm.SugarApp，這是不能避免的。

您試圖投context到活動在這一行：

((Activity) context).startActivityForResult(intent, MainFragment.REQUEST_CODE); 

context實際上是因此爲什麼你所得到的崩潰com.orm.SugarApp一個實例。

因爲你是從一個片段執行此則使用下面的代碼來代替：

getActivity().startActivityForResult(intent, MainFragment.REQUEST_CODE); 

UPDATE：

沒有通過應用上下文適配器，通過一個活動背景：

這是錯誤的：

viewPagerAdapter = new ViewPagerAdapter(getActivity().getApplicationContext(), list, balance_list, periods_list); 
    viewPager.setAdapter(viewPagerAdapter); 

而是執行此操作：

viewPagerAdapter = new ViewPagerAdapter(getActivity(), list, balance_list, periods_list); 
    viewPager.setAdapter(viewPagerAdapter); 

UPDATE：

你實例化一個片段，而不是將其連接到任何東西，然後試圖用它來把火關startActivitiesForResult意圖。這是不對的，使用適配器此範圍內，你已經有了上下文：

更改此：

MainFragment mainFragment = new MainFragment(); 
mainFragment.startActivityForResult(intent, MainFragment.REQUEST_CODE); 

要這樣：

((Activity) context).startActivityForResult(intent, MainFragment.REQUEST_CODE);