ProfileEdit: Finish writing code-behind

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

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

@@ -1,6 +1,8 @@
 package com.wireguard.android;
 
+import android.app.Fragment;
 import android.content.Intent;
+import android.os.Bundle;
 import android.view.MenuItem;
 
 /**
@@ -8,6 +10,14 @@ import android.view.MenuItem;
  */
 
 public class ProfileEditActivity extends ProfileActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.profile_edit_activity);
+        Fragment editFragment = getFragmentManager().findFragmentByTag(TAG_EDIT);
+        ((ProfileEditFragment) editFragment).setProfile(getCurrentProfile());
+    }
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {

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

@@ -1,8 +1,59 @@
 package com.wireguard.android;
 
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.wireguard.android.databinding.ProfileEditFragmentBinding;
+import com.wireguard.config.Profile;
+
 /**
  * Fragment for editing a WireGuard profile.
  */
 
 public class ProfileEditFragment extends ProfileFragment {
+    private ProfileEditFragmentBinding binding;
+    private Profile copy;
+
+    @Override
+    protected void onCachedProfileChanged(Profile cachedProfile) {
+        copy = cachedProfile != null ? cachedProfile.copy() : null;
+        if (binding != null)
+            binding.setProfile(copy);
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        inflater.inflate(R.menu.profile_edit, menu);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
+        binding = ProfileEditFragmentBinding.inflate(inflater, parent, false);
+        binding.setProfile(copy);
+        return binding.getRoot();
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.menu_action_save:
+                final ProfileServiceInterface service = getService();
+                if (service != null)
+                    service.saveProfile(getProfile(), copy);
+                return true;
+            default:
+                return false;
+        }
+    }
 }