1 files changed, 50 insertions, 0 deletions
diff --git a/java/com/android/dialer/app/FloatingActionButtonBehavior.java b/java/com/android/dialer/app/FloatingActionButtonBehavior.java
new file mode 100644
index 000000000..d4a79ca19
--- /dev/null
+++ b/java/com/android/dialer/app/FloatingActionButtonBehavior.java
@@ -0,0 +1,50 @@
+/*
+ * 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.dialer.app;
+
+import android.content.Context;
+import android.support.design.widget.CoordinatorLayout;
+import android.support.design.widget.Snackbar.SnackbarLayout;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.FrameLayout;
+import com.android.dialer.proguard.UsedByReflection;
+
+/**
+ * Implements custom behavior for the movement of the FAB in response to the Snackbar. Because we
+ * are not using the design framework FloatingActionButton widget, we need to manually implement the
+ * Material Design behavior of having the FAB translate upward and downward with the appearance and
+ * disappearance of a Snackbar.
+ */
+@UsedByReflection(value = "dialtacts_activity.xml")
+public class FloatingActionButtonBehavior extends CoordinatorLayout.Behavior<FrameLayout> {
+
+  @UsedByReflection(value = "dialtacts_activity.xml")
+  public FloatingActionButtonBehavior(Context context, AttributeSet attrs) {}
+
+  @Override
+  public boolean layoutDependsOn(CoordinatorLayout parent, FrameLayout child, View dependency) {
+    return dependency instanceof SnackbarLayout;
+  }
+
+  @Override
+  public boolean onDependentViewChanged(
+      CoordinatorLayout parent, FrameLayout child, View dependency) {
+    float translationY = Math.min(0, dependency.getTranslationY() - dependency.getHeight());
+    child.setTranslationY(translationY);
+    return true;
+  }
+}