Add IME switcher/hide button bar when IME showing

Bug: 180046394
Change-Id: Ic2bd919ab3d27e0a430b081c771ea8dc5827be81

quickstep/src/com/android/launcher3/taskbar/ButtonProvider.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2021 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.taskbar;
+
+import android.annotation.DrawableRes;
+import android.content.Context;
+import android.view.View;
+import android.widget.ImageView;
+
+import com.android.launcher3.R;
+
+/**
+ * Creates Buttons for Taskbar for 3 button nav.
+ * Can add animations and state management for buttons in this class as things progress.
+ */
+public class ButtonProvider {
+
+    private int mMarginLeftRight;
+    private final Context mContext;
+
+    public ButtonProvider(Context context) {
+        mContext = context;
+    }
+
+    public void setMarginLeftRight(int margin) {
+        mMarginLeftRight = margin;
+    }
+
+    public View getBack() {
+        // Back button
+        return getButtonForDrawable(R.drawable.ic_sysbar_back);
+    }
+
+    public View getDown() {
+        // Ime down button
+        return getButtonForDrawable(R.drawable.ic_sysbar_back);
+    }
+
+    public View getHome() {
+        // Home button
+        return getButtonForDrawable(R.drawable.ic_sysbar_home);
+    }
+
+    public View getRecents() {
+        // Recents button
+        return getButtonForDrawable(R.drawable.ic_sysbar_recent);
+    }
+
+    public View getImeSwitcher() {
+        // IME Switcher Button
+        return getButtonForDrawable(R.drawable.ic_ime_switcher);
+    }
+
+    private View getButtonForDrawable(@DrawableRes int drawableId) {
+        ImageView buttonView = new ImageView(mContext);
+        buttonView.setImageResource(drawableId);
+        buttonView.setBackgroundResource(R.drawable.taskbar_icon_click_feedback_roundrect);
+        buttonView.setPadding(mMarginLeftRight, 0, mMarginLeftRight, 0);
+        return buttonView;
+    }
+
+}