ProfileList: Convert to a fragment

This is required for a future two-fragment tablet layout, and simplifies
the code a bit since the profile detail (view/edit) will be implemented
as fragments anyway.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/AndroidManifest.xml

@@ -12,7 +12,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@android:style/Theme.Material.Light.DarkActionBar">
-        <activity android:name=".ProfileListActivity">
+        <activity android:name=".ProfileActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/com/wireguard/android/ProfileActivity.java

@@ -5,49 +5,45 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
-import android.databinding.DataBindingUtil;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.View;
-import android.widget.AdapterView;
-import android.widget.ListView;
 
-import com.wireguard.android.databinding.ProfileListActivityBinding;
 import com.wireguard.config.Profile;
 
-public class ProfileListActivity extends Activity {
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Activity that allows creating/viewing/editing/deleting WireGuard profiles.
+ */
+
+public class ProfileActivity extends Activity {
     private final ServiceConnection connection = new ProfileServiceConnection();
-    private ProfileListActivityBinding binding;
+    private final List<ServiceConnectionListener> listeners = new ArrayList<>();
     private ProfileServiceInterface service;
 
+    public void addServiceConnectionListener(ServiceConnectionListener listener) {
+        listeners.add(listener);
+    }
+
+    public ProfileServiceInterface getService() {
+        return service;
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        binding = DataBindingUtil.setContentView(this, R.layout.profile_list_activity);
+        setContentView(R.layout.profile_activity);
         // Ensure the long-running service is started. This only needs to happen once.
         Intent intent = new Intent(this, ProfileService.class);
         startService(intent);
-
-        ListView listView = findViewById(R.id.profile_list);
-        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
-            @Override
-            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
-                Profile profile = (Profile) parent.getItemAtPosition(position);
-                if (profile == null || service == null)
-                    return;
-                if (profile.getIsConnected())
-                    service.disconnectProfile(profile);
-                else
-                    service.connectProfile(profile);
-            }
-        });
     }
 
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
-        getMenuInflater().inflate(R.menu.profile_list, menu);
+        getMenuInflater().inflate(R.menu.main, menu);
         return true;
     }
 
@@ -55,6 +51,10 @@ public class ProfileListActivity extends Activity {
 
     }
 
+    public void onProfileSelected(Profile profile) {
+
+    }
+
     @Override
     public void onStart() {
         super.onStart();
@@ -67,20 +67,29 @@ public class ProfileListActivity extends Activity {
         super.onStop();
         if (service != null) {
             unbindService(connection);
+            for (ServiceConnectionListener listener : listeners)
+                listener.onServiceDisconnected();
             service = null;
         }
     }
 
+    public void removeServiceConnectionListener(ServiceConnectionListener listener) {
+        listeners.remove(listener);
+    }
+
     private class ProfileServiceConnection implements ServiceConnection {
         @Override
         public void onServiceConnected(ComponentName component, IBinder binder) {
             service = (ProfileServiceInterface) binder;
-            binding.setProfiles(service.getProfiles());
+            for (ServiceConnectionListener listener : listeners)
+                listener.onServiceConnected(service);
         }
 
         @Override
         public void onServiceDisconnected(ComponentName component) {
             // This function is only called when the service crashes or goes away unexpectedly.
+            for (ServiceConnectionListener listener : listeners)
+                listener.onServiceDisconnected();
             service = null;
         }
     }

app/src/main/java/com/wireguard/android/ProfileListFragment.java

@@ -0,0 +1,76 @@
+package com.wireguard.android;
+
+import android.app.Fragment;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ListView;
+
+import com.wireguard.android.databinding.ProfileListFragmentBinding;
+import com.wireguard.config.Profile;
+
+/**
+ * Fragment containing the list of available WireGuard profiles. Must be part of a ProfileActivity.
+ */
+
+public class ProfileListFragment extends Fragment implements ServiceConnectionListener {
+    private ProfileActivity activity;
+    private ProfileListFragmentBinding binding;
+    private ProfileServiceInterface service;
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        activity = (ProfileActivity) context;
+        activity.addServiceConnectionListener(this);
+        service = activity.getService();
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
+        binding = ProfileListFragmentBinding.inflate(inflater, parent, false);
+        final ListView listView = (ListView) binding.getRoot();
+        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                final Profile profile = (Profile) parent.getItemAtPosition(position);
+                ((ProfileActivity) getActivity()).onProfileSelected(profile);
+            }
+        });
+        listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
+            @Override
+            public boolean onItemLongClick(AdapterView<?> parent, View view, int position,
+                                           long id) {
+                final Profile profile = (Profile) parent.getItemAtPosition(position);
+                if (profile == null || service == null)
+                    return false;
+                if (profile.getIsConnected())
+                    service.disconnectProfile(profile);
+                else
+                    service.connectProfile(profile);
+                return true;
+            }
+        });
+        return binding.getRoot();
+    }
+
+    @Override
+    public void onDetach() {
+        super.onDetach();
+        activity.removeServiceConnectionListener(this);
+    }
+
+    @Override
+    public void onServiceConnected(ProfileServiceInterface service) {
+        this.service = service;
+        binding.setProfiles(service.getProfiles());
+    }
+
+    @Override
+    public void onServiceDisconnected() {
+        service = null;
+    }
+}

app/src/main/java/com/wireguard/android/ServiceConnectionListener.java

@@ -0,0 +1,11 @@
+package com.wireguard.android;
+
+/**
+ * Interface for fragments that need notification about connection changes to the ProfileService.
+ */
+
+interface ServiceConnectionListener {
+    void onServiceConnected(ProfileServiceInterface service);
+
+    void onServiceDisconnected();
+}

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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<fragment xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/profile_list_fragment"
+    android:name="com.wireguard.android.ProfileListFragment"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" />