For #9506: Implement banner custom view based on material design specs.

app/src/main/java/org/mozilla/fenix/browser/InfoBanner.kt

@@ -0,0 +1,68 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.browser
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.View.GONE
+import android.view.ViewGroup
+import android.view.ViewGroup.LayoutParams.MATCH_PARENT
+import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
+import kotlinx.android.synthetic.main.info_banner.view.*
+import org.mozilla.fenix.R
+
+/**
+ * Displays an Info Banner in the specified container with a message and an optional action.
+ * The container can be a placeholder layout inserted in the original screen, or an existing layout.
+ *
+ * @param context - A [Context] for accessing system resources.
+ * @param container - The layout where the banner will be shown
+ * @param message - The message displayed in the banner
+ * @param dismissText - The text on the dismiss button
+ * @param actionText - The text on the action to perform button
+ * @param actionToPerform - The action to be performed on action button press
+ */
+class InfoBanner(
+    private val context: Context,
+    private val container: ViewGroup,
+    private val message: String,
+    private val dismissText: String,
+    private val actionText: String? = null,
+    private val actionToPerform: (() -> Unit)? = null
+) {
+    @SuppressLint("InflateParams")
+    private val bannerLayout = LayoutInflater.from(context)
+        .inflate(R.layout.info_banner, null)
+
+    internal fun showBanner() {
+        bannerLayout.banner_info_message.text = message
+        bannerLayout.dismiss.text = dismissText
+
+        if (actionText.isNullOrEmpty()) {
+            bannerLayout.action.visibility = GONE
+        } else {
+            bannerLayout.action.text = actionText
+        }
+
+        container.addView(bannerLayout)
+
+        val params = bannerLayout.layoutParams as ViewGroup.LayoutParams
+        params.height = WRAP_CONTENT
+        params.width = MATCH_PARENT
+
+        bannerLayout.dismiss.setOnClickListener {
+            dismiss()
+        }
+
+        bannerLayout.action.setOnClickListener {
+            actionToPerform?.invoke()
+        }
+    }
+
+    internal fun dismiss() {
+        container.removeView(bannerLayout)
+    }
+}

app/src/main/res/layout/info_banner.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?><!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/banner_container"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="21dp"
+    android:background="?foundation"
+    android:paddingStart="11dp"
+    android:paddingTop="21dp"
+    android:paddingEnd="16dp">
+
+    <TextView
+        android:id="@+id/banner_info_message"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingStart="10dp"
+        android:paddingEnd="10dp"
+        android:textAppearance="@style/Body14TextStyle"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="Banner info message." />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/dismiss"
+        style="@style/CreateShortcutDialogButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="10dp"
+        android:layout_marginEnd="8dp"
+        android:textAllCaps="true"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/action"
+        app:layout_constraintTop_toBottomOf="@+id/banner_info_message"
+        tools:text="Dismiss" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/action"
+        style="@style/CreateShortcutDialogButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="10dp"
+        android:layout_marginEnd="3dp"
+        android:textAllCaps="true"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/banner_info_message"
+        tools:text="Action" />
+</androidx.constraintlayout.widget.ConstraintLayout>