add missing icons in bright theme

* missing white icons
* update attrs.xml and styles.xml

app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java

@@ -7,9 +7,12 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.content.SharedPreferences;
+import android.content.res.TypedArray;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.preference.PreferenceManager;
+import android.support.annotation.AttrRes;
+import android.support.annotation.DrawableRes;
 import android.support.v7.widget.GridLayoutManager;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
@@ -89,7 +92,7 @@ public class MissionsFragment extends Fragment {
         mEmpty = v.findViewById(R.id.list_empty_view);
         mList = v.findViewById(R.id.mission_recycler);
 
-        // Init
+        // Init layouts managers
         mGridManager = new GridLayoutManager(getActivity(), SPAN_SIZE);
         mGridManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
             @Override
@@ -103,7 +106,6 @@ public class MissionsFragment extends Fragment {
                 }
             }
         });
-
         mLinearManager = new LinearLayoutManager(getActivity());
 
         setHasOptionsMenu(true);
@@ -120,7 +122,7 @@ public class MissionsFragment extends Fragment {
 
         // Bug: in api< 23 this is never called
         // so mActivity=null
-        // so app crashes with nullpointer exception
+        // so app crashes with null-pointer exception
         mActivity = activity;
     }
 
@@ -189,12 +191,21 @@ public class MissionsFragment extends Fragment {
         mList.setAdapter(mAdapter);
 
         if (mSwitch != null) {
-            mSwitch.setIcon(mLinear ? R.drawable.grid : R.drawable.list);
+            mSwitch.setIcon(getDrawableFromAttribute(mLinear ? R.attr.ic_grid : R.attr.ic_list));
             mSwitch.setTitle(mLinear ? R.string.grid : R.string.list);
             mPrefs.edit().putBoolean("linear", mLinear).apply();
         }
     }
 
+    @DrawableRes
+    private int getDrawableFromAttribute(@AttrRes int ic) {
+        TypedArray styledAttributes = mActivity.obtainStyledAttributes(new int[]{ic});
+        int resId = styledAttributes.getResourceId(0, -1);
+        styledAttributes.recycle();
+
+        return resId;
+    }
+
     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);