Re-implement reorder and delete (drag&drop and swipe)

.idea/misc.xml

@@ -37,7 +37,7 @@
     <ConfirmationsSetting value="0" id="Add" />
     <ConfirmationsSetting value="0" id="Remove" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

README.md

@@ -39,6 +39,7 @@ goes to Bruno.
 
  * [Apache Commons Code](https://commons.apache.org/proper/commons-codec/)
  * [Code Parts from Google's Android Samples](https://android.googlesource.com/platform/development/+/master/samples/Vault/src/com/example/android/vault)
+ * [SimpleItemTouchHelperCallback](https://github.com/iPaulPro/Android-ItemTouchHelper-Demo/blob/master/app/src/main/java/co/paulburke/android/itemtouchhelperdemo/helper/SimpleItemTouchHelperCallback.java) from [Android-ItemTouchHelper-Demo](https://github.com/iPaulPro/Android-ItemTouchHelper-Demo) by Paul Burke
  * [MaterialProgressBar](https://github.com/DreaminginCodeZH/MaterialProgressBar)
  * [ZXing](https://github.com/zxing/zxing)
  * [ZXing Android Embedded](https://github.com/journeyapps/zxing-android-embedded)

app/src/main/java/org/shadowice/flocke/andotp/EntriesCardAdapter.java

@@ -28,13 +28,19 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-import java.util.List;
+import org.shadowice.flocke.andotp.ItemTouchHelper.ItemTouchHelperAdapter;
+import org.shadowice.flocke.andotp.ItemTouchHelper.ItemTouchHelperViewHolder;
 
-public class EntriesCardAdapter extends RecyclerView.Adapter<EntriesCardAdapter.EntryViewHolder> {
+import java.util.ArrayList;
+import java.util.Collections;
 
-    private List<Entry> entries;
+public class EntriesCardAdapter extends RecyclerView.Adapter<EntriesCardAdapter.EntryViewHolder>
+    implements ItemTouchHelperAdapter {
 
-    public EntriesCardAdapter(List<Entry> entries) {
+    private ArrayList<Entry> entries;
+    public MoveEventCallback moveEventCallback;
+
+    public EntriesCardAdapter(ArrayList<Entry> entries) {
         this.entries = entries;
     }
 
@@ -50,28 +56,75 @@ public class EntriesCardAdapter extends RecyclerView.Adapter<EntriesCardAdapter.
     @Override
     public void onBindViewHolder(EntryViewHolder entryViewHolder, int i) {
         Entry entry = entries.get(i);
+
         entryViewHolder.OTPValue.setText(entry.getCurrentOTP());
         entryViewHolder.OTPLabel.setText(entry.getLabel());
+        entryViewHolder.moveEventCallback = moveEventCallback;
     }
 
     @Override
     public EntryViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
-        View itemView = LayoutInflater.
-                from(viewGroup.getContext()).
-                inflate(R.layout.card_layout, viewGroup, false);
+        View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_layout, viewGroup, false);
 
         return new EntryViewHolder(itemView);
     }
 
-    public static class EntryViewHolder extends RecyclerView.ViewHolder {
+    @Override
+    public void onItemDismiss(int position) {
+        entries.remove(position);
+        notifyItemRemoved(position);
+    }
+
+    @Override
+    public boolean onItemMove(int fromPosition, int toPosition) {
+        if (fromPosition < toPosition) {
+            for (int i = fromPosition; i < toPosition; i++) {
+                Collections.swap(entries, i, i + 1);
+            }
+        } else {
+            for (int i = fromPosition; i > toPosition; i--) {
+                Collections.swap(entries, i, i - 1);
+            }
+        }
+        notifyItemMoved(fromPosition, toPosition);
+
+        return true;
+    }
+
+    public void setMoveEventCallback(MoveEventCallback cb) {
+        this.moveEventCallback = cb;
+    }
+
+    public static class EntryViewHolder extends RecyclerView.ViewHolder
+            implements ItemTouchHelperViewHolder {
+
+        private MoveEventCallback moveEventCallback;
 
         protected TextView OTPValue;
         protected TextView OTPLabel;
 
         public EntryViewHolder(View v) {
             super(v);
+
             OTPValue = (TextView) v.findViewById(R.id.textViewOTP);
             OTPLabel = (TextView) v.findViewById(R.id.textViewLabel);
         }
+
+        @Override
+        public void onItemSelected() {
+            if (moveEventCallback != null)
+                moveEventCallback.onMoveEventStart();
+        }
+
+        @Override
+        public void onItemClear() {
+            if (moveEventCallback != null)
+                moveEventCallback.onMoveEventStop();
+        }
+    }
+
+    public interface MoveEventCallback {
+        void onMoveEventStart();
+        void onMoveEventStop();
     }
 }

app/src/main/java/org/shadowice/flocke/andotp/ItemTouchHelper/ItemTouchHelperAdapter.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2015 Paul Burke
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.shadowice.flocke.andotp.ItemTouchHelper;
+
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.helper.ItemTouchHelper;
+
+/**
+ * Interface to listen for a move or dismissal event from a {@link ItemTouchHelper.Callback}.
+ *
+ * @author Paul Burke (ipaulpro)
+ */
+public interface ItemTouchHelperAdapter {
+
+    /**
+     * Called when an item has been dragged far enough to trigger a move. This is called every time
+     * an item is shifted, and <strong>not</strong> at the end of a "drop" event.<br/>
+     * <br/>
+     * Implementations should call {@link RecyclerView.Adapter#notifyItemMoved(int, int)} after
+     * adjusting the underlying data to reflect this move.
+     *
+     * @param fromPosition The start position of the moved item.
+     * @param toPosition   Then resolved position of the moved item.
+     * @return True if the item was moved to the new adapter position.
+     *
+     * @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
+     * @see RecyclerView.ViewHolder#getAdapterPosition()
+     */
+    boolean onItemMove(int fromPosition, int toPosition);
+
+
+    /**
+     * Called when an item has been dismissed by a swipe.<br/>
+     * <br/>
+     * Implementations should call {@link RecyclerView.Adapter#notifyItemRemoved(int)} after
+     * adjusting the underlying data to reflect this removal.
+     *
+     * @param position The position of the item dismissed.
+     *
+     * @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
+     * @see RecyclerView.ViewHolder#getAdapterPosition()
+     */
+    void onItemDismiss(int position);
+}

app/src/main/java/org/shadowice/flocke/andotp/ItemTouchHelper/ItemTouchHelperViewHolder.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2015 Paul Burke
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.shadowice.flocke.andotp.ItemTouchHelper;
+
+import android.support.v7.widget.helper.ItemTouchHelper;
+
+/**
+ * Interface to notify an item ViewHolder of relevant callbacks from {@link
+ * android.support.v7.widget.helper.ItemTouchHelper.Callback}.
+ *
+ * @author Paul Burke (ipaulpro)
+ */
+public interface ItemTouchHelperViewHolder {
+
+    /**
+     * Called when the {@link ItemTouchHelper} first registers an item as being moved or swiped.
+     * Implementations should update the item view to indicate it's active state.
+     */
+    void onItemSelected();
+
+
+    /**
+     * Called when the {@link ItemTouchHelper} has completed the move or swipe, and the active item
+     * state should be cleared.
+     */
+    void onItemClear();
+}

app/src/main/java/org/shadowice/flocke/andotp/ItemTouchHelper/SimpleItemTouchHelperCallback.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2015 Paul Burke
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.shadowice.flocke.andotp.ItemTouchHelper;
+
+import android.graphics.Canvas;
+import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.helper.ItemTouchHelper;
+
+/**
+ * An implementation of {@link ItemTouchHelper.Callback} that enables basic drag & drop and
+ * swipe-to-dismiss. Drag events are automatically started by an item long-press.<br/>
+ * </br/>
+ * Expects the <code>RecyclerView.Adapter</code> to listen for {@link
+ * ItemTouchHelperAdapter} callbacks and the <code>RecyclerView.ViewHolder</code> to implement
+ * {@link ItemTouchHelperViewHolder}.
+ *
+ * @author Paul Burke (ipaulpro)
+ */
+public class SimpleItemTouchHelperCallback extends ItemTouchHelper.Callback {
+
+    public static final float ALPHA_FULL = 1.0f;
+
+    private final ItemTouchHelperAdapter mAdapter;
+
+    public SimpleItemTouchHelperCallback(ItemTouchHelperAdapter adapter) {
+        mAdapter = adapter;
+    }
+
+    @Override
+    public boolean isLongPressDragEnabled() {
+        return true;
+    }
+
+    @Override
+    public boolean isItemViewSwipeEnabled() {
+        return true;
+    }
+
+    @Override
+    public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
+        // Set movement flags based on the layout manager
+        if (recyclerView.getLayoutManager() instanceof GridLayoutManager) {
+            final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
+            final int swipeFlags = 0;
+            return makeMovementFlags(dragFlags, swipeFlags);
+        } else {
+            final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
+            final int swipeFlags = ItemTouchHelper.START | ItemTouchHelper.END;
+            return makeMovementFlags(dragFlags, swipeFlags);
+        }
+    }
+
+    @Override
+    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder source, RecyclerView.ViewHolder target) {
+        if (source.getItemViewType() != target.getItemViewType()) {
+            return false;
+        }
+
+        // Notify the adapter of the move
+        mAdapter.onItemMove(source.getAdapterPosition(), target.getAdapterPosition());
+        return true;
+    }
+
+    @Override
+    public void onSwiped(RecyclerView.ViewHolder viewHolder, int i) {
+        // Notify the adapter of the dismissal
+        mAdapter.onItemDismiss(viewHolder.getAdapterPosition());
+    }
+
+    @Override
+    public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
+        if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
+            // Fade out the view as it is swiped out of the parent's bounds
+            final float alpha = ALPHA_FULL - Math.abs(dX) / (float) viewHolder.itemView.getWidth();
+            viewHolder.itemView.setAlpha(alpha);
+            viewHolder.itemView.setTranslationX(dX);
+        } else {
+            super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
+        }
+    }
+
+    @Override
+    public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {
+        // We only want the active item to change
+        if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
+            if (viewHolder instanceof ItemTouchHelperViewHolder) {
+                // Let the view holder know that this item is being moved or dragged
+                ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
+                itemViewHolder.onItemSelected();
+            }
+        }
+
+        super.onSelectedChanged(viewHolder, actionState);
+    }
+
+    @Override
+    public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
+        super.clearView(recyclerView, viewHolder);
+
+        viewHolder.itemView.setAlpha(ALPHA_FULL);
+
+        if (viewHolder instanceof ItemTouchHelperViewHolder) {
+            // Tell the view holder it's time to restore the idle state
+            ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
+            itemViewHolder.onItemClear();
+        }
+    }
+}

app/src/main/java/org/shadowice/flocke/andotp/MainActivity.java

@@ -40,6 +40,7 @@ import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
+import android.support.v7.widget.helper.ItemTouchHelper;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -51,6 +52,8 @@ import android.widget.TextView;
 import com.google.zxing.client.android.Intents;
 import com.google.zxing.integration.android.IntentIntegrator;
 
+import org.shadowice.flocke.andotp.ItemTouchHelper.SimpleItemTouchHelperCallback;
+
 import java.util.ArrayList;
 
 public class MainActivity extends AppCompatActivity {
@@ -157,6 +160,7 @@ public class MainActivity extends AppCompatActivity {
         });
 
         final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);
+
         RecyclerView recList = (RecyclerView) findViewById(R.id.cardList);
         recList.setHasFixedSize(true);
         LinearLayoutManager llm = new LinearLayoutManager(this);
@@ -168,6 +172,24 @@ public class MainActivity extends AppCompatActivity {
         adapter = new EntriesCardAdapter(entries);
         recList.setAdapter(adapter);
 
+        ItemTouchHelper.Callback callback = new SimpleItemTouchHelperCallback(adapter);
+        ItemTouchHelper touchHelper = new ItemTouchHelper(callback);
+        touchHelper.attachToRecyclerView(recList);
+
+        adapter.setMoveEventCallback(new EntriesCardAdapter.MoveEventCallback() {
+            @Override
+            public void onMoveEventStart() {
+                stopUpdater();
+            }
+
+            @Override
+            public void onMoveEventStop() {
+                startUpdater();
+
+                SettingsHelper.store(getBaseContext(), entries);
+            }
+        });
+
         if(entries.isEmpty()){
             showNoAccount();
         }