Replace current activity fragment with highlight

Test: Manual
Change-Id: Id85a26f56ea4a721791d481ca9a1ff130f090df7

samples/IntentPlayground/src/com/example/android/intentplayground/BaseActivity.java

@@ -77,7 +77,6 @@ public abstract class BaseActivity extends AppCompatActivity implements
         FragmentTransaction transaction = fragmentManager.beginTransaction()
                 .setCustomAnimations(android.R.animator.fade_in, android.R.animator.fade_out);
         if (mode == Mode.LAUNCH) {
-            transaction.replace(R.id.fragment_container, new CurrentTaskFragment());
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                 TreeFragment currentTaskFragment = new TreeFragment();
                 Bundle args = new Bundle();

samples/IntentPlayground/src/com/example/android/intentplayground/InlineAdapter.java

@@ -16,6 +16,10 @@
 
 package com.example.android.intentplayground;
 
+
+import android.app.ActivityManager;
+import android.app.ActivityManager.AppTask;
+import android.app.ActivityManager.RecentTaskInfo;
 import android.content.Intent;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -27,7 +31,6 @@ import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentTransaction;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.example.android.intentplayground.InlineAdapter.TaskViewHolder;
@@ -38,13 +41,32 @@ import java.util.List;
 public class InlineAdapter extends RecyclerView.Adapter<TaskViewHolder> {
 
     private final List<Node> mTasks;
+    private int mCurrentTaskIndex;
     private FragmentActivity mActivity;
 
     public InlineAdapter(Node tree, FragmentActivity activity) {
         this.mActivity = activity;
         this.mTasks = tree.mChildren;
+        this.mCurrentTaskIndex = indexOfRunningTask();
     }
 
+    public int indexOfRunningTask() {
+        List<AppTask> appTasks = mActivity.getSystemService(ActivityManager.class).getAppTasks();
+        RecentTaskInfo currentTask = appTasks.get(0).getTaskInfo();
+
+        int index = 0;
+        for (int i = 0; i < mTasks.size(); i++) {
+            Node task = mTasks.get(i);
+            if (task.mTaskId == currentTask.id) {
+                index = i;
+                break;
+            }
+        }
+
+        return index;
+    }
+
+
     @NonNull
     @Override
     public TaskViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
@@ -55,7 +77,9 @@ public class InlineAdapter extends RecyclerView.Adapter<TaskViewHolder> {
 
     @Override
     public void onBindViewHolder(@NonNull TaskViewHolder holder, int position) {
-        holder.setTask(mTasks.get(position), mActivity.getSupportFragmentManager());
+        boolean highLightRunningActivity = position == mCurrentTaskIndex;
+        holder.setTask(mTasks.get(position), mActivity.getSupportFragmentManager(),
+                highLightRunningActivity);
     }
 
     @Override
@@ -74,18 +98,20 @@ public class InlineAdapter extends RecyclerView.Adapter<TaskViewHolder> {
             mActivitiesLayout = itemView.findViewById(R.id.activity_node_container);
         }
 
-        public void setTask(Node task, FragmentManager manager) {
+        public void setTask(Node task, FragmentManager manager, boolean highLightRunningActivity) {
             mTaskIdTextView.setText(task.mTaskId == Node.NEW_TASK_ID
                     ? mTaskIdTextView.getContext().getString(R.string.new_task)
                     : String.valueOf(task.mTaskId));
-            mTaskIdTextView.setTextColor(mTaskIdTextView.getContext()
+            int taskColor = mTaskIdTextView.getContext()
                     .getResources().getColor(ColorManager.getColorForTask(task.mTaskId),
-                            null /* theme */));
+                            null /* theme */);
+            mTaskIdTextView.setTextColor(taskColor);
 
             mActivitiesLayout.removeAllViews();
             for (Node activity : task.mChildren) {
                 View activityView = LayoutInflater.from(mActivitiesLayout.getContext())
                         .inflate(R.layout.activity_node, mActivitiesLayout, false);
+
                 TextView activityName = activityView.findViewById(R.id.activity_name);
                 ImageButton intentButtonView = activityView.findViewById(R.id.intent_button);
 
@@ -109,6 +135,12 @@ public class InlineAdapter extends RecyclerView.Adapter<TaskViewHolder> {
                     showDialogWithFlags(manager, activity.mName.getShortClassName(), flags);
                 });
 
+
+                if (highLightRunningActivity) {
+                    highLightRunningActivity = false;
+                    activityName.setTextColor(taskColor);
+                }
+
                 mActivitiesLayout.addView(activityView);
             }
         }