AppListDialogFragment: add implementation for excluding applications

Signed-off-by: Eric Kuck <eric@bluelinelabs.com>

app/src/main/java/com/wireguard/android/backend/GoBackend.java

@@ -171,6 +171,9 @@ public final class GoBackend implements Backend {
             configureIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             builder.setConfigureIntent(PendingIntent.getActivity(context, 0, configureIntent, 0));
 
+            for (final String excludedApplication : config.getInterface().getExcludedApplications())
+                builder.addDisallowedApplication(excludedApplication);
+
             for (final InetNetwork addr : config.getInterface().getAddresses())
                 builder.addAddress(addr.getAddress(), addr.getMask());
 
@@ -250,5 +253,6 @@ public final class GoBackend implements Backend {
             }
             return super.onStartCommand(intent, flags, startId);
         }
+
     }
 }

app/src/main/java/com/wireguard/android/databinding/BindingAdapters.java

@@ -9,16 +9,18 @@ package com.wireguard.android.databinding;
 import android.databinding.BindingAdapter;
 import android.databinding.ObservableList;
 import android.databinding.adapters.ListenerUtil;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.text.InputFilter;
 import android.widget.LinearLayout;
 import android.widget.ListView;
 import android.widget.TextView;
 
 import com.wireguard.android.R;
-import com.wireguard.util.Keyed;
 import com.wireguard.android.util.ObservableKeyedList;
 import com.wireguard.android.widget.ToggleSwitch;
 import com.wireguard.android.widget.ToggleSwitch.OnBeforeCheckedChangeListener;
+import com.wireguard.util.Keyed;
 
 /**
  * Static methods for use by generated code in the Android data binding library.
@@ -91,9 +93,39 @@ public final class BindingAdapters {
         adapter.setList(newList);
     }
 
+    @BindingAdapter({"items", "layout"})
+    public static <K, E extends Keyed<? extends K>>
+    void setItems(final RecyclerView view,
+                  final ObservableKeyedList<K, E> oldList, final int oldLayoutId,
+                  final ObservableKeyedList<K, E> newList, final int newLayoutId) {
+        if (view.getLayoutManager() == null)
+            view.setLayoutManager(new LinearLayoutManager(view.getContext(), RecyclerView.VERTICAL, false));
+
+        if (oldList == newList && oldLayoutId == newLayoutId)
+            return;
+        // The ListAdapter interface is not generic, so this cannot be checked.
+        @SuppressWarnings("unchecked") ObservableKeyedRecyclerViewAdapter<K, E> adapter =
+                (ObservableKeyedRecyclerViewAdapter<K, E>) view.getAdapter();
+        // If the layout changes, any existing adapter must be replaced.
+        if (adapter != null && oldList != null && oldLayoutId != newLayoutId) {
+            adapter.setList(null);
+            adapter = null;
+        }
+        // Avoid setting an adapter when there is no new list or layout.
+        if (newList == null || newLayoutId == 0)
+            return;
+        if (adapter == null) {
+            adapter = new ObservableKeyedRecyclerViewAdapter<>(view.getContext(), newLayoutId, newList);
+            view.setAdapter(adapter);
+        }
+        // Either the list changed, or this is an entirely new listener because the layout changed.
+        adapter.setList(newList);
+    }
+
     @BindingAdapter("onBeforeCheckedChanged")
     public static void setOnBeforeCheckedChanged(final ToggleSwitch view,
                                                  final OnBeforeCheckedChangeListener listener) {
         view.setOnBeforeCheckedChangeListener(listener);
     }
+
 }

app/src/main/java/com/wireguard/android/databinding/ObservableKeyedRecyclerViewAdapter.java

@@ -0,0 +1,135 @@
+package com.wireguard.android.databinding;
+
+import android.content.Context;
+import android.databinding.DataBindingUtil;
+import android.databinding.ObservableList;
+import android.databinding.ViewDataBinding;
+import android.support.annotation.NonNull;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.RecyclerView.Adapter;
+import android.view.LayoutInflater;
+import android.view.ViewGroup;
+
+import com.wireguard.android.BR;
+import com.wireguard.android.util.ObservableKeyedList;
+import com.wireguard.util.Keyed;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * A generic {@code RecyclerView.Adapter} backed by a {@code ObservableKeyedList}.
+ */
+
+class ObservableKeyedRecyclerViewAdapter<K, E extends Keyed<? extends K>> extends Adapter<ObservableKeyedRecyclerViewAdapter.ViewHolder> {
+
+    private final OnListChangedCallback<E> callback = new OnListChangedCallback<>(this);
+    private final int layoutId;
+    private final LayoutInflater layoutInflater;
+    private ObservableKeyedList<K, E> list;
+
+    ObservableKeyedRecyclerViewAdapter(final Context context, final int layoutId,
+                                       final ObservableKeyedList<K, E> list) {
+        this.layoutId = layoutId;
+        layoutInflater = LayoutInflater.from(context);
+        setList(list);
+    }
+
+    @Override
+    public int getItemCount() {
+        return list != null ? list.size() : 0;
+    }
+
+    private E getItem(final int position) {
+        if (list == null || position < 0 || position >= list.size())
+            return null;
+        return list.get(position);
+    }
+
+    @Override
+    public long getItemId(final int position) {
+        final K key = getKey(position);
+        return key != null ? key.hashCode() : -1;
+    }
+
+    private K getKey(final int position) {
+        final E item = getItem(position);
+        return item != null ? item.getKey() : null;
+    }
+
+    @NonNull @Override
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        return new ViewHolder(DataBindingUtil.inflate(layoutInflater, layoutId, parent, false));
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
+        holder.binding.setVariable(BR.collection, list);
+        holder.binding.setVariable(BR.key, getKey(position));
+        holder.binding.setVariable(BR.item, getItem(position));
+        holder.binding.executePendingBindings();
+    }
+
+    void setList(final ObservableKeyedList<K, E> newList) {
+        if (list != null)
+            list.removeOnListChangedCallback(callback);
+        list = newList;
+        if (list != null) {
+            list.addOnListChangedCallback(callback);
+        }
+        notifyDataSetChanged();
+    }
+
+    private static final class OnListChangedCallback<E extends Keyed<?>>
+            extends ObservableList.OnListChangedCallback<ObservableList<E>> {
+
+        private final WeakReference<ObservableKeyedRecyclerViewAdapter<?, E>> weakAdapter;
+
+        private OnListChangedCallback(final ObservableKeyedRecyclerViewAdapter<?, E> adapter) {
+            weakAdapter = new WeakReference<>(adapter);
+        }
+
+        @Override
+        public void onChanged(final ObservableList<E> sender) {
+            final ObservableKeyedRecyclerViewAdapter adapter = weakAdapter.get();
+            if (adapter != null)
+                adapter.notifyDataSetChanged();
+            else
+                sender.removeOnListChangedCallback(this);
+        }
+
+        @Override
+        public void onItemRangeChanged(final ObservableList<E> sender, final int positionStart,
+                                       final int itemCount) {
+            onChanged(sender);
+        }
+
+        @Override
+        public void onItemRangeInserted(final ObservableList<E> sender, final int positionStart,
+                                        final int itemCount) {
+            onChanged(sender);
+        }
+
+        @Override
+        public void onItemRangeMoved(final ObservableList<E> sender, final int fromPosition,
+                                     final int toPosition, final int itemCount) {
+            onChanged(sender);
+        }
+
+        @Override
+        public void onItemRangeRemoved(final ObservableList<E> sender, final int positionStart,
+                                       final int itemCount) {
+            onChanged(sender);
+        }
+    }
+
+    public static class ViewHolder extends RecyclerView.ViewHolder {
+        final ViewDataBinding binding;
+
+        public ViewHolder(ViewDataBinding binding) {
+            super(binding.getRoot());
+
+            this.binding = binding;
+        }
+    }
+
+}

app/src/main/java/com/wireguard/android/fragment/AppListDialogFragment.java

@@ -0,0 +1,132 @@
+package com.wireguard.android.fragment;
+
+import android.app.Activity;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.Fragment;
+import android.support.v7.app.AlertDialog;
+import android.widget.Toast;
+
+import com.wireguard.android.Application;
+import com.wireguard.android.R;
+import com.wireguard.android.activity.BaseActivity;
+import com.wireguard.android.databinding.AppListDialogFragmentBinding;
+import com.wireguard.android.model.ApplicationData;
+import com.wireguard.android.model.Tunnel;
+import com.wireguard.android.util.ExceptionLoggers;
+import com.wireguard.android.util.ObservableKeyedArrayList;
+import com.wireguard.android.util.ObservableKeyedList;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class AppListDialogFragment extends DialogFragment {
+
+    private static final String KEY_EXCLUDED_APPS = "excludedApps";
+
+    private List<String> currentlyExcludedApps;
+    private Tunnel tunnel;
+    private final ObservableKeyedList<String, ApplicationData> appData = new ObservableKeyedArrayList<>();
+
+    public static <T extends Fragment & AppExclusionListener> AppListDialogFragment newInstance(String[] excludedApps, T target) {
+        Bundle extras = new Bundle();
+        extras.putStringArray(KEY_EXCLUDED_APPS, excludedApps);
+        AppListDialogFragment fragment = new AppListDialogFragment();
+        fragment.setTargetFragment(target, 0);
+        fragment.setArguments(extras);
+        return fragment;
+    }
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        currentlyExcludedApps = Arrays.asList(getArguments().getStringArray(KEY_EXCLUDED_APPS));
+    }
+
+    @Override
+    public void onAttach(final Context context) {
+        super.onAttach(context);
+        if (context instanceof BaseActivity) {
+            tunnel = ((BaseActivity) context).getSelectedTunnel();
+        }
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity());
+        alertDialogBuilder.setTitle(R.string.excluded_applications);
+
+        AppListDialogFragmentBinding binding = AppListDialogFragmentBinding.inflate(getActivity().getLayoutInflater(), null, false);
+        binding.executePendingBindings();
+        alertDialogBuilder.setView(binding.getRoot());
+
+        alertDialogBuilder.setPositiveButton(R.string.set_exclusions, (dialog, which) -> setExclusionsAndDismiss());
+        alertDialogBuilder.setNegativeButton(R.string.cancel, (dialog, which) -> dialog.dismiss());
+
+        binding.setFragment(this);
+        binding.setAppData(appData);
+
+        loadData();
+
+        return alertDialogBuilder.create();
+    }
+
+    private void loadData() {
+        final Activity activity = getActivity();
+        if (activity == null) {
+            return;
+        }
+
+        final PackageManager pm = activity.getPackageManager();
+        Application.getAsyncWorker().supplyAsync(() -> {
+            Intent launcherIntent = new Intent(Intent.ACTION_MAIN, null);
+            launcherIntent.addCategory(Intent.CATEGORY_LAUNCHER);
+            List<ResolveInfo> resolveInfos = pm.queryIntentActivities(launcherIntent, 0);
+
+            List<ApplicationData> appData = new ArrayList<>();
+            for (ResolveInfo resolveInfo : resolveInfos) {
+                String packageName = resolveInfo.activityInfo.packageName;
+                appData.add(new ApplicationData(resolveInfo.loadIcon(pm), resolveInfo.loadLabel(pm).toString(), packageName, currentlyExcludedApps.contains(packageName)));
+            }
+
+            Collections.sort(appData, (lhs, rhs) -> lhs.getName().toLowerCase().compareTo(rhs.getName().toLowerCase()));
+            return appData;
+        }).whenComplete(((data, throwable) -> {
+            if (data != null) {
+                appData.clear();
+                appData.addAll(data);
+            } else {
+                final String error = throwable != null ? ExceptionLoggers.unwrapMessage(throwable) : "Unknown";
+                final String message = activity.getString(R.string.error_fetching_apps, error);
+                Toast.makeText(activity, message, Toast.LENGTH_LONG).show();
+                dismissAllowingStateLoss();
+            }
+        }));
+    }
+
+    void setExclusionsAndDismiss() {
+        final List<String> excludedApps = new ArrayList<>();
+        for (ApplicationData data : appData) {
+            if (data.isExcludedFromTunnel()) {
+                excludedApps.add(data.getPackageName());
+            }
+        }
+
+        ((AppExclusionListener) getTargetFragment()).onExcludedAppsSelected(excludedApps);
+        dismiss();
+    }
+
+    public interface AppExclusionListener {
+        void onExcludedAppsSelected(List<String> excludedApps);
+    }
+
+}

app/src/main/java/com/wireguard/android/fragment/TunnelEditorFragment.java

@@ -11,6 +11,7 @@ import android.content.Context;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.design.widget.Snackbar;
+import android.support.v4.app.FragmentManager;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -24,16 +25,20 @@ import android.widget.Toast;
 import com.wireguard.android.Application;
 import com.wireguard.android.R;
 import com.wireguard.android.databinding.TunnelEditorFragmentBinding;
+import com.wireguard.android.fragment.AppListDialogFragment.AppExclusionListener;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.TunnelManager;
 import com.wireguard.android.util.ExceptionLoggers;
+import com.wireguard.config.Attribute;
 import com.wireguard.config.Config;
 
+import java.util.List;
+
 /**
  * Fragment for editing a WireGuard configuration.
  */
 
-public class TunnelEditorFragment extends BaseFragment {
+public class TunnelEditorFragment extends BaseFragment implements AppExclusionListener {
     private static final String KEY_LOCAL_CONFIG = "local_config";
     private static final String KEY_ORIGINAL_NAME = "original_name";
     private static final String TAG = "WireGuard/" + TunnelEditorFragment.class.getSimpleName();
@@ -202,6 +207,8 @@ public class TunnelEditorFragment extends BaseFragment {
 
     @Override
     public void onViewStateRestored(final Bundle savedInstanceState) {
+        binding.setFragment(this);
+
         if (savedInstanceState == null) {
             onSelectedTunnelChanged(null, getSelectedTunnel());
         } else {
@@ -216,4 +223,23 @@ public class TunnelEditorFragment extends BaseFragment {
 
         super.onViewStateRestored(savedInstanceState);
     }
+
+    public void onRequestSetExcludedApplications(@SuppressWarnings("unused") final View view) {
+        FragmentManager fragmentManager = getFragmentManager();
+        if (fragmentManager != null) {
+            String[] excludedApps = excludedApplications();
+            AppListDialogFragment fragment = AppListDialogFragment.newInstance(excludedApps, this);
+            fragment.show(getFragmentManager(), null);
+        }
+    }
+
+    @Override
+    public void onExcludedAppsSelected(List<String> excludedApps) {
+        binding.getConfig().getInterfaceSection().setExcludedApplications(Attribute.iterableToString(excludedApps));
+    }
+
+    public String[] excludedApplications() {
+       return Attribute.stringToList(binding.getConfig().getInterfaceSection().getExcludedApplications());
+    }
+
 }

app/src/main/java/com/wireguard/android/model/ApplicationData.java

@@ -0,0 +1,54 @@
+package com.wireguard.android.model;
+
+import android.databinding.BaseObservable;
+import android.databinding.Bindable;
+import android.graphics.drawable.Drawable;
+import android.support.annotation.NonNull;
+
+import com.wireguard.android.BR;
+import com.wireguard.util.Keyed;
+
+public class ApplicationData extends BaseObservable implements Keyed<String> {
+
+    @NonNull private final Drawable icon;
+    @NonNull private final String name;
+    @NonNull private final String packageName;
+    private boolean excludedFromTunnel;
+
+    public ApplicationData(@NonNull Drawable icon, @NonNull String name, @NonNull String packageName, boolean excludedFromTunnel) {
+        this.icon = icon;
+        this.name = name;
+        this.packageName = packageName;
+        this.excludedFromTunnel = excludedFromTunnel;
+    }
+
+    @NonNull
+    public Drawable getIcon() {
+        return icon;
+    }
+
+    @NonNull
+    public String getName() {
+        return name;
+    }
+
+    @NonNull
+    public String getPackageName() {
+        return packageName;
+    }
+
+    @Bindable
+    public boolean isExcludedFromTunnel() {
+        return excludedFromTunnel;
+    }
+
+    public void setExcludedFromTunnel(boolean excludedFromTunnel) {
+        this.excludedFromTunnel = excludedFromTunnel;
+        notifyPropertyChanged(BR.excludedFromTunnel);
+    }
+
+    @Override
+    public String getKey() {
+        return name;
+    }
+}

app/src/main/java/com/wireguard/config/Attribute.java

@@ -18,10 +18,11 @@ import java.util.regex.Pattern;
  * The set of valid attributes for an interface or peer in a WireGuard configuration file.
  */
 
-enum Attribute {
+public enum Attribute {
     ADDRESS("Address"),
     ALLOWED_IPS("AllowedIPs"),
     DNS("DNS"),
+    EXCLUDED_APPLICATIONS("ExcludedApplications"),
     ENDPOINT("Endpoint"),
     LISTEN_PORT("ListenPort"),
     MTU("MTU"),
@@ -59,7 +60,7 @@ enum Attribute {
     }
 
     public static String[] stringToList(final String string) {
-        if (string == null)
+        if (TextUtils.isEmpty(string))
             return EMPTY_LIST;
         return LIST_SEPARATOR_PATTERN.split(string.trim());
     }

app/src/main/java/com/wireguard/config/Interface.java

@@ -16,6 +16,7 @@ import com.wireguard.crypto.Keypair;
 
 import java.net.InetAddress;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 /**
@@ -25,6 +26,7 @@ import java.util.List;
 public class Interface {
     private final List<InetNetwork> addressList;
     private final List<InetAddress> dnsList;
+    private final List<String> excludedApplications;
     private Keypair keypair;
     private int listenPort;
     private int mtu;
@@ -32,6 +34,7 @@ public class Interface {
     public Interface() {
         addressList = new ArrayList<>();
         dnsList = new ArrayList<>();
+        excludedApplications = new ArrayList<>();
     }
 
     private void addAddresses(final String[] addresses) {
@@ -52,6 +55,12 @@ public class Interface {
         }
     }
 
+    private void addExcludedApplications(final String[] applications) {
+        if (applications != null && applications.length > 0) {
+            excludedApplications.addAll(Arrays.asList(applications));
+        }
+    }
+
     private String getAddressString() {
         if (addressList.isEmpty())
             return null;
@@ -79,6 +88,16 @@ public class Interface {
         return dnsList.toArray(new InetAddress[dnsList.size()]);
     }
 
+    private String getExcludedApplicationsString() {
+        if (excludedApplications.isEmpty())
+            return null;
+        return Attribute.iterableToString(excludedApplications);
+    }
+
+    public String[] getExcludedApplications() {
+        return excludedApplications.toArray(new String[excludedApplications.size()]);
+    }
+
     public int getListenPort() {
         return listenPort;
     }
@@ -120,6 +139,9 @@ public class Interface {
             case DNS:
                 addDnses(key.parseList(line));
                 break;
+            case EXCLUDED_APPLICATIONS:
+                addExcludedApplications(key.parseList(line));
+                break;
             case LISTEN_PORT:
                 setListenPortString(key.parse(line));
                 break;
@@ -144,6 +166,11 @@ public class Interface {
         addDnses(Attribute.stringToList(dnsString));
     }
 
+    private void setExcludedApplicationsString(final String applicationsString) {
+        excludedApplications.clear();
+        addExcludedApplications(Attribute.stringToList(applicationsString));
+    }
+
     private void setListenPort(final int listenPort) {
         this.listenPort = listenPort;
     }
@@ -179,6 +206,8 @@ public class Interface {
             sb.append(Attribute.ADDRESS.composeWith(addressList));
         if (!dnsList.isEmpty())
             sb.append(Attribute.DNS.composeWith(getDnsStrings()));
+        if (!excludedApplications.isEmpty())
+            sb.append(Attribute.EXCLUDED_APPLICATIONS.composeWith(excludedApplications));
         if (listenPort != 0)
             sb.append(Attribute.LISTEN_PORT.composeWith(listenPort));
         if (mtu != 0)
@@ -202,6 +231,7 @@ public class Interface {
         };
         private String addresses;
         private String dnses;
+        private String excludedApplications;
         private String listenPort;
         private String mtu;
         private String privateKey;
@@ -219,11 +249,13 @@ public class Interface {
             privateKey = in.readString();
             listenPort = in.readString();
             mtu = in.readString();
+            excludedApplications = in.readString();
         }
 
         public void commitData(final Interface parent) {
             parent.setAddressString(addresses);
             parent.setDnsString(dnses);
+            parent.setExcludedApplicationsString(excludedApplications);
             parent.setPrivateKey(privateKey);
             parent.setListenPortString(listenPort);
             parent.setMtuString(mtu);
@@ -254,6 +286,11 @@ public class Interface {
             return dnses;
         }
 
+        @Bindable
+        public String getExcludedApplications() {
+            return excludedApplications;
+        }
+
         @Bindable
         public String getListenPort() {
             return listenPort;
@@ -277,6 +314,7 @@ public class Interface {
         protected void loadData(final Interface parent) {
             addresses = parent.getAddressString();
             dnses = parent.getDnsString();
+            excludedApplications = parent.getExcludedApplicationsString();
             publicKey = parent.getPublicKey();
             privateKey = parent.getPrivateKey();
             listenPort = parent.getListenPortString();
@@ -293,6 +331,11 @@ public class Interface {
             notifyPropertyChanged(BR.dnses);
         }
 
+        public void setExcludedApplications(final String excludedApplications) {
+            this.excludedApplications = excludedApplications;
+            notifyPropertyChanged(BR.excludedApplications);
+        }
+
         public void setListenPort(final String listenPort) {
             this.listenPort = listenPort;
             notifyPropertyChanged(BR.listenPort);
@@ -324,6 +367,7 @@ public class Interface {
             dest.writeString(privateKey);
             dest.writeString(listenPort);
             dest.writeString(mtu);
+            dest.writeString(excludedApplications);
         }
     }
 }

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

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+
+        <import type="android.view.View" />
+
+        <import type="com.wireguard.android.model.ApplicationData" />
+
+        <variable
+            name="fragment"
+            type="com.wireguard.android.fragment.AppListDialogFragment" />
+
+        <variable
+            name="appData"
+            type="com.wireguard.android.util.ObservableKeyedList&lt;String, ApplicationData&gt;" />
+    </data>
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:minHeight="200dp" >
+
+        <ProgressBar
+            android:id="@+id/progress_bar"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:indeterminate="true"
+            android:visibility="@{appData.isEmpty() ? View.VISIBLE : View.GONE}"/>
+
+        <android.support.v7.widget.RecyclerView
+            android:id="@+id/app_list"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:items="@{appData}"
+            app:layout="@{@layout/app_list_item}" />
+
+    </FrameLayout>
+
+
+</layout>

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

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+
+        <import type="com.wireguard.android.model.ApplicationData" />
+
+        <variable
+            name="collection"
+            type="com.wireguard.android.util.ObservableKeyedList&lt;String, com.wireguard.android.model.ApplicationData&gt;" />
+
+        <variable
+            name="key"
+            type="String" />
+
+        <variable
+            name="item"
+            type="com.wireguard.android.model.ApplicationData" />
+    </data>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/list_item_background_anim"
+        android:padding="16dp"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:onClick="@{(view) -> item.setExcludedFromTunnel(!item.excludedFromTunnel)}">
+
+        <ImageView
+            android:id="@+id/app_icon"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:src="@{item.icon}" />
+
+        <TextView
+            android:id="@+id/app_name"
+            style="?android:attr/textAppearanceMedium"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:paddingEnd="8dp"
+            android:paddingStart="8dp"
+            android:text="@{key}" />
+
+        <CheckBox
+            android:id="@+id/excluded_checkbox"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:checked="@={item.excludedFromTunnel}" />
+
+    </LinearLayout>
+</layout>

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

@@ -13,6 +13,10 @@
 
         <import type="com.wireguard.config.Peer" />
 
+        <variable
+            name="fragment"
+            type="com.wireguard.android.fragment.TunnelEditorFragment" />
+
         <variable
             name="config"
             type="com.wireguard.config.Config.Observable" />
@@ -211,6 +215,15 @@
                             android:inputType="number"
                             android:text="@={config.interfaceSection.mtu}"
                             android:textAlignment="center" />
+
+                        <Button
+                            style="@style/Widget.AppCompat.Button.Borderless.Colored"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:layout_marginLeft="-8dp"
+                            android:layout_below="@+id/dns_servers_text"
+                            android:onClick="@{fragment::onRequestSetExcludedApplications}"
+                            android:text="@{fragment.excludedApplications().length == 0 ? @string/set_excluded_applications : String.format(@string/x_excluded_applications, fragment.excludedApplications().length)}" />
                     </RelativeLayout>
                 </android.support.v7.widget.CardView>
 

app/src/main/res/values/strings.xml

@@ -24,6 +24,7 @@
     <string name="addresses">Addresses</string>
     <string name="allowed_ips">Allowed IPs</string>
     <string name="app_name">WireGuard</string>
+    <string name="cancel">Cancel</string>
     <string name="config_save_error">Unable to save configuration for “%s”: %s</string>
     <string name="config_save_success">Successfully saved configuration for “%s”</string>
     <string name="create_activity_title">Create WireGuard Tunnel</string>
@@ -37,9 +38,11 @@
     <string name="dns_servers">DNS servers</string>
     <string name="edit">Edit</string>
     <string name="endpoint">Endpoint</string>
+    <string name="error_fetching_apps">Error fetching apps list: %s</string>
     <string name="error_down">Error bringing down tunnel: %s</string>
     <string name="error_root">Please obtain root access and try again</string>
     <string name="error_up">Error bringing up tunnel: %s</string>
+    <string name="excluded_applications">Excluded Applications</string>
     <string name="generate">Generate</string>
     <string name="hint_automatic">(auto)</string>
     <string name="hint_generated">(generated)</string>
@@ -66,6 +69,8 @@
     <string name="restore_on_boot_summary">Bring up previously-enabled tunnels on boot</string>
     <string name="restore_on_boot_title">Restore on boot</string>
     <string name="save">Save</string>
+    <string name="set_excluded_applications">Set Excluded Applications</string>
+    <string name="set_exclusions">Set Exclusions</string>
     <string name="settings">Settings</string>
     <string name="toggle_error">Error toggling WireGuard tunnel: %s</string>
     <string name="tools_installer_already">wg and wg-quick are already installed</string>
@@ -85,6 +90,7 @@
     <string name="version_summary">%s backend v%s</string>
     <string name="version_summary_checking">Checking %s backend version</string>
     <string name="version_summary_unknown">Unknown %s version</string>
+    <string name="x_excluded_applications">%d Excluded Applications</string>
     <string name="zip_exporter_title">Export tunnels to zip file</string>
     <string name="zip_export_error">Unable to export tunnels: %s</string>
     <string name="zip_export_success">Saved to %s</string>