1 files changed, 50 insertions, 0 deletions
diff --git a/packages/SystemUI/src/com/android/keyguard/AlphaOptimizedLinearLayout.java b/packages/SystemUI/src/com/android/keyguard/AlphaOptimizedLinearLayout.java
new file mode 100644
index 000000000000..2c6c4fa341ca
--- /dev/null
+++ b/packages/SystemUI/src/com/android/keyguard/AlphaOptimizedLinearLayout.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2014 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.keyguard;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.LinearLayout;
+
+/**
+ * A linear layout which does not have overlapping renderings commands and therefore does not need a
+ * layer when alpha is changed.
+ */
+public class AlphaOptimizedLinearLayout extends LinearLayout
+{
+    public AlphaOptimizedLinearLayout(Context context) {
+        super(context);
+    }
+
+    public AlphaOptimizedLinearLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public AlphaOptimizedLinearLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public AlphaOptimizedLinearLayout(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    public boolean hasOverlappingRendering() {
+        return false;
+    }
+}