Add task item view for Recents Go.

Add a task item view for the recycler view to inflate when task data
updates. Currently, the adapter only binds the icon and label.
Thumbnails will be handled in a separate CL.

Bug: 114136250
Test: Manual test Launcher3GoIconRecents
Change-Id: Iaff2001fbbf0a3fc6f5781f90b336bee43f9076e

go/quickstep/res/layout/task_item_view.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2019 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.
+-->
+<com.android.quickstep.views.TaskItemView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal">
+    <ImageView
+        android:id="@+id/task_icon_and_thumbnail"
+        android:layout_width="@dimen/task_thumbnail_icon_size"
+        android:layout_height="@dimen/task_thumbnail_icon_size"
+        android:layout_gravity="center_vertical"
+        android:layout_marginHorizontal="8dp"/>
+    <TextView
+        android:id="@+id/task_label"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_vertical"
+        android:layout_marginHorizontal="8dp"
+        android:singleLine="true"
+        android:textColor="@android:color/white"
+        android:textSize="24sp"/>
+</com.android.quickstep.views.TaskItemView>

go/quickstep/src/com/android/quickstep/TaskAdapter.java

@@ -15,16 +15,17 @@
  */
 package com.android.quickstep;
 
+import android.view.LayoutInflater;
 import android.view.ViewGroup;
-import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView.Adapter;
 
+import com.android.launcher3.R;
+import com.android.quickstep.views.TaskItemView;
 import com.android.systemui.shared.recents.model.Task;
 
 import java.util.ArrayList;
-
 /**
  * Recycler view adapter that dynamically inflates and binds {@link TaskHolder} instances with the
  * appropriate {@link Task} from the recents task list.
@@ -42,8 +43,9 @@ public final class TaskAdapter extends Adapter<TaskHolder> {
     @Override
     public TaskHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         // TODO: Swap in an actual task view here (view w/ icon, label, etc.)
-        TextView stubView = new TextView(parent.getContext());
-        return new TaskHolder(stubView);
+        TaskItemView itemView = (TaskItemView) LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.task_item_view, parent, false);
+        return new TaskHolder(itemView);
     }
 
     @Override

go/quickstep/src/com/android/quickstep/TaskHolder.java

@@ -15,10 +15,9 @@
  */
 package com.android.quickstep;
 
-import android.widget.TextView;
-
 import androidx.recyclerview.widget.RecyclerView.ViewHolder;
 
+import com.android.quickstep.views.TaskItemView;
 import com.android.systemui.shared.recents.model.Task;
 
 /**
@@ -27,22 +26,21 @@ import com.android.systemui.shared.recents.model.Task;
  */
 final class TaskHolder extends ViewHolder {
 
-    // TODO: Implement the actual task view to be held.
-    // For now, we just use a simple text view.
-    private final TextView mStubView;
+    private final TaskItemView mTaskItemView;
 
-    public TaskHolder(TextView stubView) {
-        super(stubView);
-        mStubView = stubView;
+    public TaskHolder(TaskItemView itemView) {
+        super(itemView);
+        mTaskItemView = itemView;
     }
 
     /**
      * Bind task content to the view. This includes the task icon and title as well as binding
      * input handlers such as which task to launch/remove.
      *
-     * @param task the task to bind to the view this
+     * @param task the task to bind to the view
      */
     public void bindTask(Task task) {
-        mStubView.setText("Stub task view: " + task.titleDescription);
+        mTaskItemView.setLabel(task.titleDescription);
+        mTaskItemView.setIcon(task.icon);
     }
 }

go/quickstep/src/com/android/quickstep/views/TaskItemView.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2019 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.quickstep.views;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.android.launcher3.R;
+
+/**
+ * View representing an individual task item with the icon + thumbnail adjacent to the task label.
+ */
+public final class TaskItemView extends LinearLayout {
+
+    private TextView mLabelView;
+    private ImageView mIconView;
+
+    public TaskItemView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mLabelView = findViewById(R.id.task_label);
+        mIconView = findViewById(R.id.task_icon_and_thumbnail);
+    }
+
+    /**
+     * Set the label for the task item.
+     *
+     * @param label task label
+     */
+    public void setLabel(String label) {
+        mLabelView.setText(label);
+    }
+
+    /**
+     * Set the icon for the task item.
+     *
+     * @param icon task icon
+     */
+    public void setIcon(Drawable icon) {
+        mIconView.setImageDrawable(icon);
+        // TODO: Add in combination drawable for icon + thumbnail
+    }
+}