add ability to use skills

Habitica/AndroidManifest.xml

@@ -48,7 +48,10 @@
                 <action android:name="android.intent.action.MAIN" />
             </intent-filter>
         </activity>
-
+        <activity
+            android:name=".SkillTasksActivity"
+            android:label="@string/app_name">
+        </activity>
         <receiver
             android:name=".widget.SimpleWidget"
             android:icon="@mipmap/ic_launcher"

Habitica/res/layout/activity_skill_tasks.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <android.support.design.widget.TabLayout
+        android:id="@+id/tab_layout"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:layout_gravity="bottom"
+        android:background="?attr/colorPrimary"
+        android:elevation="0dp"
+        android:fillViewport="false"
+
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+        app:layout_anchor="@+id/collapsing_toolbar"
+        app:layout_anchorGravity="bottom"
+
+        app:layout_collapseMode="pin"
+        app:tabGravity="fill"
+        app:tabIndicatorColor="@android:color/white"
+        app:tabMode="fixed" />
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/viewpager"
+        android:layout_width="match_parent"
+        android:layout_height="0px"
+        android:layout_weight="1"
+        android:background="@android:color/white" />
+
+</LinearLayout>

Habitica/res/layout/skill_task_item_card.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <data>
+
+        <import type="com.magicmicky.habitrpgwrapper.lib.models.tasks.Task" />
+        <import type="android.view.View"/>
+
+        <variable
+            name="task"
+            type="Task" />
+    </data>
+
+    <LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:background="@color/white">
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+            <RelativeLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical"
+                    android:layout_centerVertical="true"
+                    android:paddingLeft="16dp"
+                    android:paddingRight="16dp"
+                    android:paddingEnd="16dp"
+                    android:paddingBottom="20dp"
+                    android:paddingTop="20dp">
+                    <TextView
+                        android:id="@+id/checkedTextView"
+                        style="@style/CardTitle"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:text="@{task.text}" />
+
+                    <TextView
+                        android:id="@+id/notesTextView"
+                        style="@style/CardText"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:text="@{task.notes}"
+                        android:visibility="@{task.notes != null ? View.VISIBLE : View.GONE}"/>
+                </LinearLayout>
+                <View
+                    android:id="@+id/rightBorderView"
+                    android:layout_width="5dp"
+                    android:layout_height="match_parent"
+                    app:backgroundColor="@{task.getLightTaskColor}"
+                    android:gravity="center"
+                    android:layout_alignParentTop="true"
+                    android:layout_alignParentRight="true"
+                    android:layout_alignParentEnd="true" />
+            </RelativeLayout>
+        </LinearLayout>
+        <View
+            android:id="@+id/bottomBorderView"
+            android:layout_width="match_parent"
+            android:layout_height="0.5dp"
+            android:background="@color/cell_separator"/>
+    </LinearLayout>
+</layout>

Habitica/res/values/strings.xml

@@ -179,4 +179,5 @@
     <string name="profile_image">Profile Image</string>
 
     <string name="mana_price_button" formatted="false">%d MP</string>
+    <string name="used_skill" formatted="false">You used %1$s for %2$d mana.</string>
 </resources>

Habitica/src/com/habitrpg/android/habitica/SkillTasksActivity.java

@@ -0,0 +1,109 @@
+package com.habitrpg.android.habitica;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.design.widget.TabLayout;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentPagerAdapter;
+import android.support.v4.app.FragmentStatePagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.support.v7.app.AppCompatActivity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import com.habitrpg.android.habitica.ui.adapter.HabitItemRecyclerViewAdapter;
+import com.habitrpg.android.habitica.ui.adapter.SkillTasksRecyclerViewAdapter;
+import com.habitrpg.android.habitica.ui.fragments.SkillTasksRecyclerViewFragment;
+import com.habitrpg.android.habitica.ui.fragments.TaskRecyclerViewFragment;
+import com.habitrpg.android.habitica.ui.fragments.TasksFragment;
+import com.magicmicky.habitrpgwrapper.lib.models.HabitRPGUser;
+import com.magicmicky.habitrpgwrapper.lib.models.tasks.Task;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import butterknife.ButterKnife;
+import butterknife.InjectView;
+
+/**
+ * Created by viirus on 28/11/15.
+ */
+public class SkillTasksActivity extends AppCompatActivity {
+    @InjectView(R.id.viewpager)
+    public ViewPager viewPager;
+
+    @InjectView(R.id.tab_layout)
+    public TabLayout tabLayout;
+
+    Map<Integer, SkillTasksRecyclerViewFragment> ViewFragmentsDictionary = new HashMap<>();
+    protected HabitRPGUser user;
+
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_skill_tasks);
+
+        ButterKnife.inject(this);
+
+        loadTaskLists();
+    }
+
+    public void loadTaskLists() {
+        android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
+
+        viewPager.setAdapter(new FragmentPagerAdapter(fragmentManager) {
+
+            @Override
+            public Fragment getItem(int position) {
+                SkillTasksRecyclerViewFragment fragment;
+
+                switch (position) {
+                    case 0:
+                        fragment = SkillTasksRecyclerViewFragment.newInstance(new SkillTasksRecyclerViewAdapter(Task.TYPE_HABIT, SkillTasksActivity.this), Task.TYPE_HABIT);
+                        break;
+                    case 1:
+                        fragment = SkillTasksRecyclerViewFragment.newInstance(new SkillTasksRecyclerViewAdapter(Task.TYPE_DAILY, SkillTasksActivity.this), Task.TYPE_DAILY);
+
+                        break;
+                    default:
+                        fragment = SkillTasksRecyclerViewFragment.newInstance(new SkillTasksRecyclerViewAdapter(Task.TYPE_TODO, SkillTasksActivity.this), Task.TYPE_TODO);
+                }
+
+                ViewFragmentsDictionary.put(position, fragment);
+
+                return fragment;
+            }
+
+            @Override
+            public int getCount() {
+                return 3;
+            }
+
+            @Override
+            public CharSequence getPageTitle(int position) {
+                switch (position) {
+                    case 0:
+                        return "Habits";
+                    case 1:
+                        return "Dailies";
+                    case 2:
+                        return "Todos";
+                }
+                return "";
+            }
+        });
+
+
+        tabLayout.setupWithViewPager(viewPager);
+    }
+
+    public void taskSelected(String taskId) {
+        Intent resultIntent = new Intent();
+        resultIntent.putExtra("task_id", taskId);
+        setResult(Activity.RESULT_OK, resultIntent);
+        finish();
+    }
+}

Habitica/src/com/habitrpg/android/habitica/callbacks/SkillCallback.java

@@ -0,0 +1,42 @@
+package com.habitrpg.android.habitica.callbacks;
+
+import android.util.Log;
+
+import com.crashlytics.android.Crashlytics;
+import com.habitrpg.android.habitica.events.SkillUsedEvent;
+import com.habitrpg.android.habitica.events.TaskCreatedEvent;
+import com.magicmicky.habitrpgwrapper.lib.models.HabitRPGUser;
+import com.magicmicky.habitrpgwrapper.lib.models.Skill;
+import com.magicmicky.habitrpgwrapper.lib.models.tasks.Task;
+
+import de.greenrobot.event.EventBus;
+import retrofit.Callback;
+import retrofit.RetrofitError;
+import retrofit.client.Response;
+
+/**
+ * Created by viirus on 28/11/15.
+ */
+public class SkillCallback implements Callback<HabitRPGUser> {
+
+    private Skill usedSkill;
+    private final HabitRPGUserCallback.OnUserReceived callback;
+
+    public SkillCallback(HabitRPGUserCallback.OnUserReceived callback, Skill usedSkill) {
+        this.callback = callback;
+        this.usedSkill = usedSkill;
+    }
+
+    @Override
+    public void success(HabitRPGUser habitRPGUser, Response response) {
+        habitRPGUser.async().save();
+        EventBus.getDefault().post(new SkillUsedEvent(this.usedSkill, habitRPGUser.getStats().getMp()));
+        callback.onUserReceived(habitRPGUser);
+    }
+
+    @Override
+    public void failure(RetrofitError error) {
+        Crashlytics.logException(error);
+        callback.onUserFail();
+    }
+}

Habitica/src/com/habitrpg/android/habitica/events/SkillUsedEvent.java

@@ -0,0 +1,17 @@
+package com.habitrpg.android.habitica.events;
+
+import com.magicmicky.habitrpgwrapper.lib.models.Skill;
+
+/**
+ * Created by viirus on 28/11/15.
+ */
+public class SkillUsedEvent {
+
+    public Skill usedSkill;
+    public Double newMana;
+
+    public SkillUsedEvent(Skill usedSkill, Double newMana) {
+        this.usedSkill = usedSkill;
+        this.newMana = newMana;
+    }
+}

Habitica/src/com/habitrpg/android/habitica/events/commands/UseSkillCommand.java

@@ -0,0 +1,11 @@
+package com.habitrpg.android.habitica.events.commands;
+
+import com.magicmicky.habitrpgwrapper.lib.models.Skill;
+
+/**
+ * Created by viirus on 28/11/15.
+ */
+public class UseSkillCommand {
+
+    public Skill skill;
+}

Habitica/src/com/habitrpg/android/habitica/ui/adapter/SkillTasksRecyclerViewAdapter.java

@@ -0,0 +1,168 @@
+package com.habitrpg.android.habitica.ui.adapter;
+
+import android.app.Activity;
+import android.content.Context;
+import android.databinding.DataBindingUtil;
+import android.databinding.ObservableArrayList;
+import android.os.Handler;
+import android.support.v7.widget.RecyclerView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.habitrpg.android.habitica.R;
+import com.habitrpg.android.habitica.SkillTasksActivity;
+import com.habitrpg.android.habitica.databinding.SkillTaskItemCardBinding;
+import com.habitrpg.android.habitica.events.TaskLongPressedEvent;
+import com.habitrpg.android.habitica.events.TaskTappedEvent;
+import com.magicmicky.habitrpgwrapper.lib.models.tasks.Task;
+import com.raizlabs.android.dbflow.sql.builder.Condition;
+import com.raizlabs.android.dbflow.sql.language.OrderBy;
+import com.raizlabs.android.dbflow.sql.language.Select;
+import com.raizlabs.android.dbflow.structure.BaseModel;
+import com.raizlabs.android.dbflow.structure.Model;
+
+import java.util.UUID;
+
+import butterknife.ButterKnife;
+import butterknife.InjectView;
+import de.greenrobot.event.EventBus;
+
+
+public class SkillTasksRecyclerViewAdapter extends RecyclerView.Adapter<SkillTasksRecyclerViewAdapter.ViewHolder> {
+
+
+    String taskType;
+    private ObservableArrayList<Task> observableContent;
+    SkillTasksActivity activity;
+
+    static final int TYPE_CELL = 1;
+    private RecyclerView.Adapter<ViewHolder> parentAdapter;
+
+    public SkillTasksRecyclerViewAdapter(String taskType, SkillTasksActivity activity) {
+        this.setHasStableIds(true);
+        this.taskType = taskType;
+        this.activity = activity;
+
+        this.loadContent();
+
+    }
+
+    public void setParentAdapter(RecyclerView.Adapter<SkillTasksRecyclerViewAdapter.ViewHolder> parentAdapter) {
+        this.parentAdapter = parentAdapter;
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        switch (position) {
+            default:
+                return TYPE_CELL;
+        }
+    }
+
+    @Override
+    public long getItemId(int position) {
+        Task task = observableContent.get(position);
+        if (task.getId() != null && task.getId().length() == 36) {
+            return UUID.fromString(task.getId()).getMostSignificantBits();
+        }
+        return UUID.randomUUID().getMostSignificantBits();
+    }
+
+    @Override
+    public int getItemCount() {
+        return observableContent.size();
+    }
+
+    @Override
+    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View view = null;
+        view = LayoutInflater.from(parent.getContext())
+                        .inflate(R.layout.skill_task_item_card, parent, false);
+        return new SkillTasksRecyclerViewAdapter.ViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(ViewHolder holder, int position) {
+        Task item = observableContent.get(position);
+
+        holder.bindHolder(item, position);
+    }
+
+    // region ViewHolders
+
+    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
+
+        protected android.content.res.Resources resources;
+
+        public Task task;
+
+        SkillTaskItemCardBinding binding;
+
+        @InjectView(R.id.notesTextView)
+        TextView notesTextView;
+
+        public ViewHolder(View itemView) {
+            super(itemView);
+
+            itemView.setOnClickListener(this);
+            itemView.setClickable(true);
+
+            ButterKnife.inject(this, itemView);
+            binding = DataBindingUtil.bind(itemView);
+
+            resources = itemView.getResources();
+        }
+
+        public void bindHolder(Task habitItem, int position) {
+            double itemvalue = habitItem.getValue();
+            task = habitItem;
+            if (habitItem.notes == null || habitItem.notes.length() == 0) {
+                notesTextView.setHeight(0);
+            } else {
+                notesTextView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
+            }
+            binding.setTask(task);
+        }
+
+        @Override
+        public void onClick(View v) {
+            if (v != itemView)
+                return;
+            activity.taskSelected(task.getId());
+        }
+
+    }
+
+    // endregion
+
+    public void loadContent() {
+        this.loadContent(false);
+    }
+
+    public void loadContent(boolean forced) {
+
+        if (this.observableContent == null || forced) {
+
+            this.observableContent = new ObservableArrayList<>();
+
+            this.observableContent.addAll(new Select().from(Task.class)
+                    .where(Condition.column("type").eq(this.taskType))
+                    .and(Condition.CombinedCondition
+                                    .begin(Condition.column("completed").eq(false))
+                                    .or(Condition.column("type").eq("daily"))
+                    )
+                    .orderBy(OrderBy.columns("dateCreated").descending())
+                    .queryList());
+        }
+
+        if (parentAdapter != null) {
+            parentAdapter.notifyDataSetChanged();
+        } else {
+            notifyDataSetChanged();
+        }
+    }
+}

Habitica/src/com/habitrpg/android/habitica/ui/adapter/SkillsRecyclerViewAdapter.java

@@ -17,6 +17,7 @@ import android.widget.TextView;
 
 import com.habitrpg.android.habitica.R;
 import com.habitrpg.android.habitica.databinding.ValueBarBinding;
+import com.habitrpg.android.habitica.events.TaskTappedEvent;
 import com.habitrpg.android.habitica.events.commands.CopyChatAsTodoCommand;
 import com.habitrpg.android.habitica.events.commands.DeleteChatMessageCommand;
 import com.habitrpg.android.habitica.events.commands.FlagChatMessageCommand;
@@ -24,6 +25,7 @@ import com.habitrpg.android.habitica.events.commands.OpenNewPMActivityCommand;
 import com.habitrpg.android.habitica.events.commands.SendNewGroupMessageCommand;
 import com.habitrpg.android.habitica.events.commands.ToggleInnCommand;
 import com.habitrpg.android.habitica.events.commands.ToggleLikeMessageCommand;
+import com.habitrpg.android.habitica.events.commands.UseSkillCommand;
 import com.habitrpg.android.habitica.ui.AvatarWithBarsViewModel;
 import com.habitrpg.android.habitica.ui.helpers.DataBindingUtils;
 import com.habitrpg.android.habitica.ui.helpers.ViewHelper;
@@ -59,6 +61,11 @@ public class SkillsRecyclerViewAdapter extends RecyclerView.Adapter<SkillsRecycl
         this.notifyDataSetChanged();
     }
 
+    public void setMana(Double mana) {
+        this.mana = mana;
+        this.notifyDataSetChanged();
+    }
+
 
     @Override
     public SkillViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
@@ -79,7 +86,7 @@ public class SkillsRecyclerViewAdapter extends RecyclerView.Adapter<SkillsRecycl
         return skillList == null ? 0 : skillList.size();
     }
 
-    class SkillViewHolder extends RecyclerView.ViewHolder {
+    class SkillViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
 
         @InjectView(R.id.skill_text)
         TextView skillNameTextView;
@@ -90,6 +97,8 @@ public class SkillsRecyclerViewAdapter extends RecyclerView.Adapter<SkillsRecycl
         @InjectView(R.id.price_button)
         Button priceButton;
 
+        Skill skill;
+
         Resources resources;
 
         public SkillViewHolder(View itemView) {
@@ -98,9 +107,12 @@ public class SkillsRecyclerViewAdapter extends RecyclerView.Adapter<SkillsRecycl
             ButterKnife.inject(this, itemView);
 
             resources = itemView.getResources();
+
+            priceButton.setOnClickListener(this);
         }
 
         public void bind(Skill skill) {
+            this.skill = skill;
             skillNameTextView.setText(skill.text);
             skillNotesTextView.setText(skill.notes);
             priceButton.setText(String.format(resources.getString(R.string.mana_price_button), skill.mana));
@@ -115,7 +127,14 @@ public class SkillsRecyclerViewAdapter extends RecyclerView.Adapter<SkillsRecycl
                 skillNotesTextView.setTextColor(resources.getColor(android.R.color.black));
                 priceButton.setEnabled(true);
             }
+        }
 
+        @Override
+        public void onClick(View v) {
+            UseSkillCommand event = new UseSkillCommand();
+            event.skill = this.skill;
+
+            EventBus.getDefault().post(event);
         }
     }
 }

Habitica/src/com/habitrpg/android/habitica/ui/fragments/SkillTasksRecyclerViewFragment.java

@@ -0,0 +1,80 @@
+package com.habitrpg.android.habitica.ui.fragments;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.habitrpg.android.habitica.R;
+import com.habitrpg.android.habitica.events.commands.AddNewTaskCommand;
+import com.habitrpg.android.habitica.ui.adapter.HabitItemRecyclerViewAdapter;
+import com.habitrpg.android.habitica.ui.adapter.SkillTasksRecyclerViewAdapter;
+
+import de.greenrobot.event.EventBus;
+
+/**
+ * Created by viirus on 28/11/15.
+ */
+public class SkillTasksRecyclerViewFragment extends Fragment implements View.OnClickListener {
+        public RecyclerView mRecyclerView;
+        public RecyclerView.Adapter mAdapter;
+        private String classType;
+
+        public void SetInnerAdapter(SkillTasksRecyclerViewAdapter adapter, String classType) {
+            this.classType = classType;
+            mAdapter = adapter;
+        }
+
+        private View view;
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+            if (view == null)
+                view = inflater.inflate(R.layout.fragment_recyclerview, container, false);
+
+            return view;
+        }
+
+        LinearLayoutManager layoutManager = null;
+
+        @Override
+        public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+            mRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
+
+            android.support.v4.app.FragmentActivity context = getActivity();
+
+            layoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
+
+            if (layoutManager == null) {
+                layoutManager = new LinearLayoutManager(context);
+
+                mRecyclerView.setLayoutManager(layoutManager);
+            }
+
+            mRecyclerView.setAdapter(mAdapter);
+        }
+
+        public static SkillTasksRecyclerViewFragment newInstance(SkillTasksRecyclerViewAdapter adapter, String classType) {
+            SkillTasksRecyclerViewFragment fragment = new SkillTasksRecyclerViewFragment();
+            fragment.setRetainInstance(true);
+
+            fragment.SetInnerAdapter(adapter, classType);
+
+            return fragment;
+        }
+
+        @Override
+        public void onClick(View v) {
+            AddNewTaskCommand event = new AddNewTaskCommand();
+            event.ClassType = this.classType;
+
+            EventBus.getDefault().post(event);
+        }
+
+}

Habitica/src/com/habitrpg/android/habitica/ui/fragments/SkillsFragment.java

@@ -1,6 +1,8 @@
 package com.habitrpg.android.habitica.ui.fragments;
 
+import android.app.Activity;
 import android.content.Context;
+import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
@@ -14,12 +16,17 @@ import android.view.ViewGroup;
 
 import com.habitrpg.android.habitica.APIHelper;
 import com.habitrpg.android.habitica.R;
+import com.habitrpg.android.habitica.SkillTasksActivity;
+import com.habitrpg.android.habitica.callbacks.HabitRPGUserCallback;
+import com.habitrpg.android.habitica.callbacks.SkillCallback;
+import com.habitrpg.android.habitica.events.SkillUsedEvent;
 import com.habitrpg.android.habitica.events.ToggledInnStateEvent;
 import com.habitrpg.android.habitica.events.commands.DeleteChatMessageCommand;
 import com.habitrpg.android.habitica.events.commands.FlagChatMessageCommand;
 import com.habitrpg.android.habitica.events.commands.SendNewGroupMessageCommand;
 import com.habitrpg.android.habitica.events.commands.ToggleInnCommand;
 import com.habitrpg.android.habitica.events.commands.ToggleLikeMessageCommand;
+import com.habitrpg.android.habitica.events.commands.UseSkillCommand;
 import com.habitrpg.android.habitica.ui.adapter.ChatRecyclerViewAdapter;
 import com.habitrpg.android.habitica.ui.adapter.SkillsRecyclerViewAdapter;
 import com.magicmicky.habitrpgwrapper.lib.models.ChatMessage;
@@ -44,11 +51,15 @@ import retrofit.client.Response;
  */
 public class SkillsFragment extends BaseFragment {
 
+    private final int TASK_SELECTION_ACTIVITY = 10;
+
     private View view;
+    private Skill selectedSkill;
 
     @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        super.onCreateView(inflater, container, savedInstanceState);
         if (view == null)
             view = inflater.inflate(R.layout.fragment_skills, container, false);
 
@@ -83,4 +94,33 @@ public class SkillsFragment extends BaseFragment {
         adapter.setSkillList(skills);
     }
 
+    public void onEvent(UseSkillCommand command) {
+        Skill skill = command.skill;
+        if (skill.target.equals("task")) {
+            selectedSkill = skill;
+            Intent intent = new Intent(activity, SkillTasksActivity.class);
+            startActivityForResult(intent, TASK_SELECTION_ACTIVITY);
+        } else {
+            mAPIHelper.apiService.useSkill(skill.key, skill.target, new SkillCallback(activity, skill));
+        }
+    }
+
+    public void onEvent(SkillUsedEvent event) {
+        Skill skill = event.usedSkill;
+        adapter.setMana(event.newMana);
+        activity.showSnackbar(activity.getString(R.string.used_skill, skill.text, skill.mana));
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        switch(requestCode) {
+            case (TASK_SELECTION_ACTIVITY) : {
+                if (resultCode == Activity.RESULT_OK) {
+                    mAPIHelper.apiService.useSkill(selectedSkill.key, selectedSkill.target, data.getStringExtra("task_id"), new SkillCallback(activity, selectedSkill));
+                }
+                break;
+            }
+        }
+    }
 }

Habitica/src/com/magicmicky/habitrpgwrapper/lib/api/ApiService.java

@@ -91,6 +91,12 @@ public interface ApiService {
     @POST("/user/revive")
     void revive(Callback<HabitRPGUser> habitRPGUserCallback);
 
+    @POST("/user/class/cast/{skill}")
+    void useSkill(@Path("skill") String skillName, @Query("targetType") String targetType, @Query("targetId") String targetId, Callback<HabitRPGUser> habitRPGUserCallback);
+
+    @POST("/user/class/cast/{skill}")
+    void useSkill(@Path("skill") String skillName, @Query("targetType") String targetType, Callback<HabitRPGUser> habitRPGUserCallback);
+
     /* Group API */
 
     @GET("/groups")