Further improving performance of All Apps transition

Change-Id: Ie8a2af004acba4c13066dd636842a71793064688

src/com/android/launcher2/AllAppsBackground.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2010 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.launcher2;
+
+import com.android.launcher.R;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * An implementation of PagedView that populates the pages of the workspace
+ * with all of the user's applications.
+ */
+public class AllAppsBackground extends View {
+    private Drawable mBackground;
+
+    public AllAppsBackground(Context context) {
+        this(context, null);
+    }
+
+    public AllAppsBackground(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public AllAppsBackground(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        mBackground = getResources().getDrawable(R.drawable.all_apps_bg_gradient);
+    }
+
+    @Override
+    public void onDraw(Canvas canvas) {
+        mBackground.setBounds(mScrollX, 0, mScrollX + getMeasuredWidth(),
+                getMeasuredHeight());
+        mBackground.draw(canvas);
+    }
+}