Add instances picker

app/build.gradle

@@ -25,6 +25,10 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    buildFeatures {
+        viewBinding = true
+    }
+
     lintOptions {
         disable 'MissingTranslation'
         checkReleaseBuilds false
@@ -44,8 +48,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.2'
-    implementation 'androidx.navigation:navigation-fragment:2.3.0'
+    implementation 'androidx.navigation:navigation-fragment:2.3.1'
-    implementation 'androidx.navigation:navigation-ui:2.3.0'
+    implementation 'androidx.navigation:navigation-ui:2.3.1'
     testImplementation 'junit:junit:4.13'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

app/src/main/AndroidManifest.xml

@@ -27,6 +27,12 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <activity
+            android:name=".InstancePickerActivity"
+            android:label="@string/instances_picker"
+            android:configChanges="orientation|screenSize|layoutDirection"
+            android:theme="@style/AppTheme"/>
     </application>
 
 </manifest>

app/src/main/java/app/fedilab/mobilizon/InstancePickerActivity.java

@@ -0,0 +1,132 @@
+package app.fedilab.mobilizon;
+
+/* Copyright 2020 Thomas Schneider
+ *
+ * This file is a part of Mobilizon app
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+
+import android.os.Bundle;
+import android.view.MenuItem;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import app.fedilab.mobilizon.client.entities.Search;
+import app.fedilab.mobilizon.client.entities.data.InstanceData;
+import app.fedilab.mobilizon.databinding.ActivityInstancePickerBinding;
+import app.fedilab.mobilizon.drawer.InstanceAdapter;
+import app.fedilab.mobilizon.viewmodel.SearchInstancesVM;
+
+
+
+
+
+public class InstancePickerActivity extends AppCompatActivity {
+
+
+    private ActivityInstancePickerBinding binding;
+    private List<InstanceData.Instance> instances;
+    private boolean flag_loading;
+    private String max_id;
+    private Search search;
+    private  InstanceAdapter instanceAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        binding = ActivityInstancePickerBinding.inflate(getLayoutInflater());
+        View view = binding.getRoot();
+        setContentView(view);
+
+        if (getSupportActionBar() != null)
+            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+
+        search = new Search();
+        search.setCount("10");
+        search.setStart(max_id);
+        search.setSort("-createdAt");
+
+        max_id = "0";
+        setContentView(R.layout.activity_instance_picker);
+        instances = new ArrayList<>();
+
+        binding.loader.setVisibility(View.VISIBLE);
+        flag_loading = true;
+        LinearLayoutManager mLayoutManager = new LinearLayoutManager(InstancePickerActivity.this);
+
+        SearchInstancesVM searchInstancesVM = new ViewModelProvider(InstancePickerActivity.this).get(SearchInstancesVM.class);
+
+        instanceAdapter = new InstanceAdapter(instances);
+        binding.lvInstances.setAdapter(instanceAdapter);
+        binding.lvInstances.setLayoutManager(mLayoutManager);
+
+        binding.lvInstances.addOnScrollListener(new RecyclerView.OnScrollListener() {
+            public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
+                int firstVisibleItem = mLayoutManager.findFirstVisibleItemPosition();
+                if (dy > 0) {
+                    int visibleItemCount = mLayoutManager.getChildCount();
+                    int totalItemCount = mLayoutManager.getItemCount();
+                    if (firstVisibleItem + visibleItemCount == totalItemCount) {
+                        if (!flag_loading) {
+                            flag_loading = true;
+                            search.setStart(max_id);
+                            searchInstancesVM.get(search).observe(InstancePickerActivity.this, instanceData -> manageVIewInstance(instanceData));
+                            binding.loadingNextInstances.setVisibility(View.VISIBLE);
+                        }
+                    } else {
+                        binding.loadingNextInstances.setVisibility(View.GONE);
+                    }
+                }
+            }
+        });
+
+        searchInstancesVM.get(search).observe(InstancePickerActivity.this, this::manageVIewInstance);
+    }
+
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            finish();
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+
+    public void manageVIewInstance(InstanceData instanceData) {
+        binding.loader.setVisibility(View.GONE);
+        binding.loadingNextInstances.setVisibility(View.GONE);
+        if (instanceData == null || instanceData.data.size() == 0) {
+            binding.noAction.setVisibility(View.VISIBLE);
+            binding.lvInstances.setVisibility(View.GONE);
+            return;
+        }
+        int oldPosition = this.instances.size();
+        List<InstanceData.Instance> instances = instanceData.data;
+        this.instances.addAll(instances);
+        instanceAdapter.notifyItemRangeInserted(oldPosition, instances.size());
+        binding.noAction.setVisibility(View.GONE);
+        binding.lvInstances.setVisibility(View.VISIBLE);
+        max_id = String.valueOf(Integer.parseInt(max_id) + 10);
+    }
+}

app/src/main/java/app/fedilab/mobilizon/MainActivity.java

@@ -61,6 +61,7 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
     private WebView main_webview;
     private FrameLayout webview_container;
     private ValueCallback<Uri[]> mFilePathCallback;
+    private static final int PICK_INSTANCE = 546;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -359,9 +360,10 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
                 }).start());
         //TODO: uncomment and add support for picking instances when available
         alt_bld.setNegativeButton(R.string.cancel, (dialog, which) -> dialog.dismiss());
-        /*alt_bld.setNeutralButton(R.string.help, (dialog, which) -> {
+        alt_bld.setNeutralButton(R.string.help, (dialog, which) -> {
+            Intent intent = new Intent(MainActivity.this, InstancePickerActivity.class);
             startActivityForResult(intent, PICK_INSTANCE);
-        });*/
+        });
         AlertDialog alert = alt_bld.create();
         alert.show();
     }

app/src/main/java/app/fedilab/mobilizon/client/InstancesService.java

@@ -0,0 +1,31 @@
+package app.fedilab.mobilizon.client;
+/* Copyright 2020 Thomas Schneider
+ *
+ * This file is a part of Mobilizon app
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+ * see <http://www.gnu.org/licenses>. */
+import app.fedilab.mobilizon.client.entities.data.InstanceData;
+import retrofit2.Call;
+import retrofit2.http.GET;
+import retrofit2.http.Query;
+
+interface InstancesService {
+
+
+    @GET("instances")
+    Call<InstanceData> getInstances(
+            @Query("start") String maxId,
+            @Query("count") String count,
+            @Query("search") String search,
+            @Query("sort") String sort);
+
+}

app/src/main/java/app/fedilab/mobilizon/client/RetrofitInstancesAPI.java

@@ -0,0 +1,57 @@
+package app.fedilab.mobilizon.client;
+/* Copyright 2020 Thomas Schneider
+ *
+ * This file is a part of Mobilizon app
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+
+import java.io.IOException;
+
+import app.fedilab.mobilizon.client.entities.Search;
+import app.fedilab.mobilizon.client.entities.data.InstanceData;
+import retrofit2.Call;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.gson.GsonConverterFactory;
+
+public class RetrofitInstancesAPI {
+
+
+    private InstancesService init() {
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl("https://instances.joinmobilizon.org/api/v1")
+                .addConverterFactory(GsonConverterFactory.create())
+                .build();
+        return retrofit.create(InstancesService.class);
+    }
+
+
+    /**
+     * Get NodeInfo
+     *
+     * @return APIResponse
+     */
+    public InstanceData search(Search search) {
+        InstancesService instancesService = init();
+        try {
+            Call<InstanceData> instanceDataCall = instancesService.getInstances(search.getStart(), search.getCount(), search.getSearch(), search.getSort());
+            Response<InstanceData> response = instanceDataCall.execute();
+            if (response.isSuccessful() && response.body() != null) {
+                return response.body();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+}

app/src/main/java/app/fedilab/mobilizon/client/RetrofitMobilizonAPI.java

@@ -27,7 +27,7 @@ import retrofit2.converter.gson.GsonConverterFactory;
 public class RetrofitMobilizonAPI {
 
 
-    private String finalUrl;
+    private final String finalUrl;
 
 
     public RetrofitMobilizonAPI(String instance) {

app/src/main/java/app/fedilab/mobilizon/client/entities/Search.java

@@ -0,0 +1,55 @@
+package app.fedilab.mobilizon.client.entities;
+/* Copyright 2020 Thomas Schneider
+ *
+ * This file is a part of Mobilizon app
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+public class Search {
+
+    private String start;
+    private String count;
+    private String search;
+    private String sort;
+
+    public String getStart() {
+        return start;
+    }
+
+    public void setStart(String start) {
+        this.start = start;
+    }
+
+    public String getCount() {
+        return count;
+    }
+
+    public void setCount(String count) {
+        this.count = count;
+    }
+
+    public String getSearch() {
+        return search;
+    }
+
+    public void setSearch(String search) {
+        this.search = search;
+    }
+
+    public String getSort() {
+        return sort;
+    }
+
+    public void setSort(String sort) {
+        this.sort = sort;
+    }
+}

app/src/main/java/app/fedilab/mobilizon/client/entities/data/InstanceData.java

@@ -0,0 +1,239 @@
+package app.fedilab.mobilizon.client.entities.data;
+
+/* Copyright 2020 Thomas Schneider
+ *
+ * This file is a part of Mobilizon app
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+import com.google.gson.annotations.SerializedName;
+
+import java.util.Date;
+import java.util.List;
+
+@SuppressWarnings({"unused", "RedundantSuppression"})
+public class InstanceData {
+
+    @SerializedName("total")
+    public int total;
+    @SerializedName("data")
+    public List<Instance> data;
+
+
+    public static class Instance {
+        @SerializedName("country")
+        private String country;
+        @SerializedName("createdAt")
+        private Date createdAt;
+        @SerializedName("health")
+        private int health;
+        @SerializedName("host")
+        private String host;
+        @SerializedName("id")
+        private String id;
+        @SerializedName("languages")
+        private List<Language> languages;
+        @SerializedName("name")
+        private String name;
+        @SerializedName("shortDescription")
+        private String shortDescription;
+        @SerializedName("signupAllowed")
+        private boolean signupAllowed;
+        @SerializedName("supportsIPv6")
+        private boolean supportsIPv6;
+        @SerializedName("totalEvents")
+        private int totalEvents;
+        @SerializedName("totalGroups")
+        private int totalGroups;
+        @SerializedName("totalInstanceFollowers")
+        private int totalInstanceFollowers;
+        @SerializedName("totalInstanceFollowing")
+        private int totalInstanceFollowing;
+        @SerializedName("totalLocalEvents")
+        private int totalLocalEvents;
+        @SerializedName("totalLocalGroups")
+        private int totalLocalGroups;
+        @SerializedName("totalUsers")
+        private int totalUsers;
+        @SerializedName("version")
+        private String version;
+
+        public String getCountry() {
+            return country;
+        }
+
+        public void setCountry(String country) {
+            this.country = country;
+        }
+
+        public Date getCreatedAt() {
+            return createdAt;
+        }
+
+        public void setCreatedAt(Date createdAt) {
+            this.createdAt = createdAt;
+        }
+
+        public int getHealth() {
+            return health;
+        }
+
+        public void setHealth(int health) {
+            this.health = health;
+        }
+
+        public String getHost() {
+            return host;
+        }
+
+        public void setHost(String host) {
+            this.host = host;
+        }
+
+        public String getId() {
+            return id;
+        }
+
+        public void setId(String id) {
+            this.id = id;
+        }
+
+        public List<Language> getLanguages() {
+            return languages;
+        }
+
+        public void setLanguages(List<Language> languages) {
+            this.languages = languages;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public String getShortDescription() {
+            return shortDescription;
+        }
+
+        public void setShortDescription(String shortDescription) {
+            this.shortDescription = shortDescription;
+        }
+
+        public boolean isSignupAllowed() {
+            return signupAllowed;
+        }
+
+        public void setSignupAllowed(boolean signupAllowed) {
+            this.signupAllowed = signupAllowed;
+        }
+
+        public boolean isSupportsIPv6() {
+            return supportsIPv6;
+        }
+
+        public void setSupportsIPv6(boolean supportsIPv6) {
+            this.supportsIPv6 = supportsIPv6;
+        }
+
+        public int getTotalEvents() {
+            return totalEvents;
+        }
+
+        public void setTotalEvents(int totalEvents) {
+            this.totalEvents = totalEvents;
+        }
+
+        public int getTotalGroups() {
+            return totalGroups;
+        }
+
+        public void setTotalGroups(int totalGroups) {
+            this.totalGroups = totalGroups;
+        }
+
+        public int getTotalInstanceFollowers() {
+            return totalInstanceFollowers;
+        }
+
+        public void setTotalInstanceFollowers(int totalInstanceFollowers) {
+            this.totalInstanceFollowers = totalInstanceFollowers;
+        }
+
+        public int getTotalInstanceFollowing() {
+            return totalInstanceFollowing;
+        }
+
+        public void setTotalInstanceFollowing(int totalInstanceFollowing) {
+            this.totalInstanceFollowing = totalInstanceFollowing;
+        }
+
+        public int getTotalLocalEvents() {
+            return totalLocalEvents;
+        }
+
+        public void setTotalLocalEvents(int totalLocalEvents) {
+            this.totalLocalEvents = totalLocalEvents;
+        }
+
+        public int getTotalLocalGroups() {
+            return totalLocalGroups;
+        }
+
+        public void setTotalLocalGroups(int totalLocalGroups) {
+            this.totalLocalGroups = totalLocalGroups;
+        }
+
+        public int getTotalUsers() {
+            return totalUsers;
+        }
+
+        public void setTotalUsers(int totalUsers) {
+            this.totalUsers = totalUsers;
+        }
+
+        public String getVersion() {
+            return version;
+        }
+
+        public void setVersion(String version) {
+            this.version = version;
+        }
+    }
+
+
+    public static class Language {
+        @SerializedName("displayName")
+        private String displayName;
+        @SerializedName("code")
+        private String code;
+
+        public String getDisplayName() {
+            return displayName;
+        }
+
+        public void setDisplayName(String displayName) {
+            this.displayName = displayName;
+        }
+
+        public String getCode() {
+            return code;
+        }
+
+        public void setCode(String code) {
+            this.code = code;
+        }
+    }
+}
+

app/src/main/java/app/fedilab/mobilizon/drawer/InstanceAdapter.java

@@ -0,0 +1,130 @@
+package app.fedilab.mobilizon.drawer;
+/* Copyright 2020 Thomas Schneider
+ *
+ * This file is a part of Mobilizon app
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import java.util.List;
+
+import app.fedilab.mobilizon.R;
+import app.fedilab.mobilizon.client.entities.data.InstanceData;
+import app.fedilab.mobilizon.client.entities.data.InstanceData.Instance;
+
+import static android.app.Activity.RESULT_OK;
+
+
+
+public class InstanceAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+
+    private final List<Instance> instances;
+
+    private Context context;
+
+    public InstanceAdapter(List<Instance> instances) {
+        this.instances = instances;
+    }
+
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        context = parent.getContext();
+        LayoutInflater layoutInflater = LayoutInflater.from(context);
+        return new ViewHolder(layoutInflater.inflate(R.layout.drawer_instance, parent, false));
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int position) {
+        final Instance instance = instances.get(position);
+        final ViewHolder holder = (ViewHolder) viewHolder;
+
+        if (instance.getShortDescription() != null && instance.getShortDescription().trim().length() > 0) {
+            holder.description.setText(instance.getShortDescription());
+            holder.description.setVisibility(View.VISIBLE);
+        } else {
+            holder.description.setVisibility(View.GONE);
+        }
+
+        holder.name.setText(instance.getName());
+        holder.host.setText(instance.getHost());
+
+
+        holder.version.setText(instance.getVersion());
+
+        StringBuilder languages = new StringBuilder();
+        if (instance.getLanguages() != null && instance.getLanguages().size() > 0) {
+            for (InstanceData.Language language : instance.getLanguages()) {
+                languages.append(language.getDisplayName()).append(" ");
+            }
+        }
+        if (languages.toString().trim().length() == 0) {
+            holder.languages.setVisibility(View.GONE);
+        } else {
+            holder.languages.setText(languages);
+            holder.languages.setVisibility(View.VISIBLE);
+        }
+
+        holder.local_events.setText(context.getString(R.string.local_events, String.valueOf(instance.getTotalLocalEvents())));
+
+        holder.pickup.setOnClickListener(v -> {
+            Intent data = new Intent();
+            String instanceHost = instance.getHost();
+            data.setData(Uri.parse(instanceHost));
+            ((Activity) context).setResult(RESULT_OK, data);
+            ((Activity) context).finish();
+        });
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return position;
+    }
+
+    @Override
+    public int getItemCount() {
+        return instances.size();
+    }
+
+
+    static class ViewHolder extends RecyclerView.ViewHolder {
+
+        Button pickup;
+        TextView name, host, description;
+        TextView version, local_events, languages;
+
+        public ViewHolder(@NonNull View itemView) {
+            super(itemView);
+            pickup = itemView.findViewById(R.id.pickup);
+            name = itemView.findViewById(R.id.name);
+            host = itemView.findViewById(R.id.host);
+            description = itemView.findViewById(R.id.description);
+            local_events = itemView.findViewById(R.id.local_events);
+            version = itemView.findViewById(R.id.version);
+            languages = itemView.findViewById(R.id.languages);
+        }
+    }
+}

app/src/main/java/app/fedilab/mobilizon/viewmodel/SearchInstancesVM.java

@@ -0,0 +1,56 @@
+package app.fedilab.mobilizon.viewmodel;
+/* Copyright 2020 Thomas Schneider
+ *
+ * This file is a part of Mobilizon app
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+
+import android.os.Handler;
+import android.os.Looper;
+
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import app.fedilab.mobilizon.client.RetrofitInstancesAPI;
+import app.fedilab.mobilizon.client.entities.Search;
+import app.fedilab.mobilizon.client.entities.data.InstanceData;
+
+public class SearchInstancesVM extends ViewModel {
+
+    private MutableLiveData<InstanceData> instanceDataMutableLiveData;
+
+
+    public LiveData<InstanceData> get(Search search) {
+        instanceDataMutableLiveData = new MutableLiveData<>();
+        searchInstances(search);
+        return instanceDataMutableLiveData;
+    }
+
+
+    private void searchInstances(Search search) {
+        new Thread(() -> {
+            try {
+                RetrofitInstancesAPI retrofitInstancesAPI = new RetrofitInstancesAPI();
+                InstanceData instanceData = retrofitInstancesAPI.search(search);
+                Handler mainHandler = new Handler(Looper.getMainLooper());
+                Runnable myRunnable = () -> instanceDataMutableLiveData.setValue(instanceData);
+                mainHandler.post(myRunnable);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }).start();
+    }
+
+}

app/src/main/res/drawable/ic_baseline_forum_24.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="?attr/colorControlNormal" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M21,6h-2v9L6,15v2c0,0.55 0.45,1 1,1h11l4,4L22,7c0,-0.55 -0.45,-1 -1,-1zM17,12L17,3c0,-0.55 -0.45,-1 -1,-1L3,2c-0.55,0 -1,0.45 -1,1v14l4,-4h10c0.55,0 1,-0.45 1,-1z"/>
+</vector>

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

@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright 2020 Thomas Schneider
+
+    This file is a part of Mobilizon app
+
+    This program is free software; you can redistribute it and/or modify it under the terms of the
+    GNU General Public License as published by the Free Software Foundation; either version 3 of the
+    License, or (at your option) any later version.
+
+    Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+    Public License for more details.
+
+    You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+    see <http://www.gnu.org/licenses>.
+-->
+<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_margin="@dimen/fab_margin">
+
+    <androidx.coordinatorlayout.widget.CoordinatorLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context=".InstancePickerActivity">
+
+        <androidx.constraintlayout.widget.ConstraintLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:padding="@dimen/fab_margin">
+
+            <androidx.cardview.widget.CardView
+                android:id="@+id/filters_container"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent">
+
+                <androidx.appcompat.widget.SearchView
+                    app:queryHint="@string/search_instance_hint"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    app:layout_constraintTop_toTopOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    android:animateLayoutChanges="false"
+                    android:id="@+id/searchBar" />
+            </androidx.cardview.widget.CardView>
+            <!-- Main Loader -->
+            <RelativeLayout
+                android:id="@+id/loader"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_marginTop="10dp"
+                android:gravity="center"
+                android:visibility="gone"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/filters_container">
+
+                <com.github.ybq.android.spinkit.SpinKitView
+                    style="@style/progress"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center"
+                    app:SpinKit_Color="?colorAccent" />
+            </RelativeLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_marginTop="10dp"
+                android:orientation="vertical"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/filters_container">
+
+                <androidx.recyclerview.widget.RecyclerView
+                    android:id="@+id/lv_instances"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:scrollbars="none" />
+                <RelativeLayout
+                    android:id="@+id/no_action"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:visibility="gone">
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="match_parent"
+                        android:layout_gravity="center"
+                        android:gravity="center"
+                        android:padding="10dp"
+                        android:text="@string/no_results"
+                        android:textSize="25sp" />
+                </RelativeLayout>
+            </LinearLayout>
+            <!-- Loader for next videos -->
+            <RelativeLayout
+                android:id="@+id/loading_next_instances"
+                android:layout_width="match_parent"
+                android:layout_height="20dp"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                android:visibility="gone"
+                >
+                <com.github.ybq.android.spinkit.SpinKitView
+                    style="@style/progressBottom"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center"
+                    app:SpinKit_Color="?colorAccent" />
+            </RelativeLayout>
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.coordinatorlayout.widget.CoordinatorLayout>
+</androidx.drawerlayout.widget.DrawerLayout>

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

@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright 2020 Thomas Schneider
+
+    This file is a part of Mobilizon app
+
+    This program is free software; you can redistribute it and/or modify it under the terms of the
+    GNU General Public License as published by the Free Software Foundation; either version 3 of the
+    License, or (at your option) any later version.
+
+    Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+    Public License for more details.
+
+    You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+    see <http://www.gnu.org/licenses>.
+-->
 <androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"

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

@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright 2020 Thomas Schneider
+
+    This file is a part of Mobilizon app
+
+    This program is free software; you can redistribute it and/or modify it under the terms of the
+    GNU General Public License as published by the Free Software Foundation; either version 3 of the
+    License, or (at your option) any later version.
+
+    Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+    Public License for more details.
+
+    You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+    see <http://www.gnu.org/licenses>.
+-->
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"

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

@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright 2020 Thomas Schneider
+
+    This file is a part of Mobilizon app
+
+    This program is free software; you can redistribute it and/or modify it under the terms of the
+    GNU General Public License as published by the Free Software Foundation; either version 3 of the
+    License, or (at your option) any later version.
+
+    Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+    Public License for more details.
+
+    You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+    see <http://www.gnu.org/licenses>.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/main_container"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="5dp"
+    android:divider="?android:dividerHorizontal"
+    android:gravity="bottom"
+    android:orientation="vertical"
+    android:showDividers="end">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:id="@+id/name"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="16sp"
+            android:textStyle="bold"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <TextView
+            android:id="@+id/host"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="10dp"
+            app:layout_constraintStart_toEndOf="@+id/name"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <TextView
+            android:id="@+id/description"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/name" />
+
+        <TextView
+            android:id="@+id/version"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/description" />
+
+        <TextView
+            android:id="@+id/local_events"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp"
+            android:drawablePadding="10dp"
+            app:drawableStartCompat="@drawable/ic_baseline_group_24"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/version" />
+
+        <TextView
+            android:id="@+id/languages"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp"
+            android:drawablePadding="10dp"
+            app:drawableStartCompat="@drawable/ic_baseline_forum_24"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/local_events" />
+
+
+
+        <Button
+            android:id="@+id/pickup"
+            style="@style/Base.Widget.AppCompat.Button.Colored"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp"
+            android:text="@string/pickup_instance"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/languages" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</LinearLayout>

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

@@ -1,18 +1,19 @@
-<?xml version="1.0" encoding="utf-8"?><!--
+<?xml version="1.0" encoding="utf-8"?>
-    Copyright 2017 Thomas Schneider
+<!--
+    Copyright 2020 Thomas Schneider
 
-    This file is a part of Fedilab
+    This file is a part of Mobilizon app
 
     This program is free software; you can redistribute it and/or modify it under the terms of the
     GNU General Public License as published by the Free Software Foundation; either version 3 of the
     License, or (at your option) any later version.
 
-    Fedilab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+    Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
     Public License for more details.
 
-    You should have received a copy of the GNU General Public License along with Fedilab; if not,
+    You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
-    see <http://www.gnu.org/licenses>
+    see <http://www.gnu.org/licenses>.
 -->
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"

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

@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright 2020 Thomas Schneider
+
+    This file is a part of Mobilizon app
+
+    This program is free software; you can redistribute it and/or modify it under the terms of the
+    GNU General Public License as published by the Free Software Foundation; either version 3 of the
+    License, or (at your option) any later version.
+
+    Mobilizon app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+    Public License for more details.
+
+    You should have received a copy of the GNU General Public License along with Mobilizon app; if not,
+    see <http://www.gnu.org/licenses>.
+-->
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"

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

@@ -39,4 +39,9 @@
     <string name="about_the_app">About the app (Release %1$s)</string>
     <string name="permissions_message">This permission is used for searching events next to your location.</string>
     <string name="settings">Settings</string>
+    <string name="search_instance_hint">Search among instances</string>
+    <string name="no_results">No results.</string>
+    <string name="instances_picker">Instances picker</string>
+    <string name="pickup_instance">Pick this instance</string>
+    <string name="local_events">Local events: %1$s</string>
 </resources>

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

@@ -16,4 +16,6 @@
 
     <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
 
+    <style name="progress" parent="SpinKitView.Circle" />
+    <style name="progressBottom" parent="SpinKitView.ThreeBounce" />
 </resources>