Moving all apps code into sub package.

- Renaming resources, dimens, etc to be more consistent
- Removing old AppsCustomize resources and other unused code

Change-Id: I15ce35e7cb7a9b9344fc7103963e4e4c9e45d89a

src/com/android/launcher3/BaseRecyclerView.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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 com.android.launcher3;
+
+import android.content.Context;
+import android.support.v7.widget.RecyclerView;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import com.android.launcher3.util.Thunk;
+
+/**
+ * A base {@link RecyclerView}, which will NOT intercept a touch sequence unless the scrolling
+ * velocity is below a predefined threshold.
+ */
+public class BaseRecyclerView extends RecyclerView
+        implements RecyclerView.OnItemTouchListener {
+
+    private static final int SCROLL_DELTA_THRESHOLD_DP = 4;
+
+    /** Keeps the last known scrolling delta/velocity along y-axis. */
+    @Thunk int mDy = 0;
+    private float mDeltaThreshold;
+
+    public BaseRecyclerView(Context context) {
+        this(context, null);
+    }
+
+    public BaseRecyclerView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public BaseRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        mDeltaThreshold = getResources().getDisplayMetrics().density * SCROLL_DELTA_THRESHOLD_DP;
+
+        ScrollListener listener = new ScrollListener();
+        setOnScrollListener(listener);
+    }
+
+    private class ScrollListener extends OnScrollListener {
+        public ScrollListener() {
+            // Do nothing
+        }
+
+        @Override
+        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+            mDy = dy;
+        }
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        addOnItemTouchListener(this);
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent ev) {
+        if (shouldStopScroll(ev)) {
+            stopScroll();
+        }
+        return false;
+    }
+
+    @Override
+    public void onTouchEvent(RecyclerView rv, MotionEvent ev) {
+        // Do nothing.
+    }
+
+    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
+        // DO NOT REMOVE, NEEDED IMPLEMENTATION FOR M BUILDS
+    }
+
+    /**
+     * Returns whether this {@link MotionEvent} should trigger the scroll to be stopped.
+     */
+    protected boolean shouldStopScroll(MotionEvent ev) {
+        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+            if ((Math.abs(mDy) < mDeltaThreshold &&
+                    getScrollState() != RecyclerView.SCROLL_STATE_IDLE)) {
+                // now the touch events are being passed to the {@link WidgetCell} until the
+                // touch sequence goes over the touch slop.
+                return true;
+            }
+        }
+        return false;
+    }
+}