converted AddServerFragment to kotlin and refactored it

app/build.gradle

@@ -1,4 +1,9 @@
-apply plugin: 'com.android.application'
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+    id 'kotlin-parcelize'
+    id 'kotlin-kapt'
+}
 
 ext.readProperty = { paramName -> readPropertyWithDefault(paramName, null) }
 ext.readPropertyWithDefault = { paramName, defaultValue ->
@@ -80,20 +85,29 @@ android {
     applicationVariants.all { variant ->
         variant.resValue "string", "versionName", variant.versionName
     }
+
+    buildFeatures{
+        viewBinding = true
+    }
+
 }
 
 def room_version = "2.2.6"
 def lifecycleVersion = '2.2.0'
 def exoplayer = '2.12.3'
+def fragment_version = "1.2.5"
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
     // Layouts and design
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.1'
     implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.1.0"
+    implementation "androidx.fragment:fragment-ktx:$fragment_version"
 
     implementation 'de.hdodenhof:circleimageview:3.0.0'
 
@@ -135,17 +149,27 @@ dependencies {
     // database lib
     implementation "androidx.room:room-runtime:$room_version"
     implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
-    annotationProcessor "androidx.room:room-compiler:$room_version"
+    kapt "androidx.room:room-compiler:$room_version"
     androidTestImplementation "androidx.room:room-testing:$room_version"
 
     // Lifecycle components
     implementation "androidx.lifecycle:lifecycle-extensions:$lifecycleVersion"
-    annotationProcessor "androidx.lifecycle:lifecycle-common-java8:$lifecycleVersion"
+    kapt "androidx.lifecycle:lifecycle-common-java8:$lifecycleVersion"
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycleVersion"
+    implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycleVersion"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycleVersion"
 
-    implementation 'androidx.preference:preference:1.1.1'
+
+    implementation 'androidx.preference:preference-ktx:1.1.1'
 
     // testing
     testImplementation 'junit:junit:4.13'
     androidTestImplementation 'androidx.test:runner:1.3.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 }
+
+tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}

app/src/main/java/net/schueller/peertube/activity/ServerAddressBookActivity.java

@@ -17,13 +17,8 @@
 package net.schueller.peertube.activity;
 
 import android.app.AlertDialog;
-import android.net.Uri;
 import android.os.Bundle;
 import android.util.Log;
-import android.view.Menu;
-import android.view.MenuInflater;
-import android.view.View;
-import android.widget.EditText;
 
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 
@@ -46,7 +41,7 @@ import net.schueller.peertube.fragment.AddServerFragment;
 
 import java.util.Objects;
 
-public class ServerAddressBookActivity extends CommonActivity implements AddServerFragment.OnFragmentInteractionListener {
+public class ServerAddressBookActivity extends CommonActivity {
 
     private String TAG = "ServerAddressBookActivity";
     public static final String EXTRA_REPLY = "net.schueller.peertube.room.REPLY";
@@ -96,10 +91,6 @@ public class ServerAddressBookActivity extends CommonActivity implements AddServ
 
     }
 
-    @Override
-    public void onFragmentInteraction(Uri uri) {
-
-    }
 
     @Override
     public void onPointerCaptureChanged(boolean hasCapture) {
@@ -112,7 +103,6 @@ public class ServerAddressBookActivity extends CommonActivity implements AddServ
         RecyclerView recyclerView = findViewById(R.id.server_list_recyclerview);
         final ServerListAdapter adapter = new ServerListAdapter(this);
         recyclerView.setAdapter(adapter);
-        recyclerView.setLayoutManager(new LinearLayoutManager(this));
 
         // Delete items on swipe
         ItemTouchHelper helper = new ItemTouchHelper(
@@ -153,32 +143,17 @@ public class ServerAddressBookActivity extends CommonActivity implements AddServ
 
 
         // Update the cached copy of the words in the adapter.
-        mServerViewModel.getAllServers().observe(this, adapter::setServers);
+        mServerViewModel.getAllServers().observe(this, servers -> {
+            adapter.setServers(servers);
 
-    }
+            if (addServerFragment != null) {
+                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
+                fragmentTransaction.remove(addServerFragment);
+                fragmentTransaction.commit();
 
-    public void addServer(View view)
+                floatingActionButton.show();
-    {
+            }
-        Log.d(TAG, "addServer");
+        });
-
-        EditText serverLabel = view.findViewById(R.id.serverLabel);
-        EditText serverUrl = view.findViewById(R.id.serverUrl);
-        EditText serverUsername = view.findViewById(R.id.serverUsername);
-        EditText serverPassword = view.findViewById(R.id.serverPassword);
-
-        Server server = new Server(serverLabel.getText().toString());
-
-        server.setServerHost(serverUrl.getText().toString());
-        server.setUsername(serverUsername.getText().toString());
-        server.setPassword(serverPassword.getText().toString());
-
-        mServerViewModel.insert(server);
-
-        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
-        fragmentTransaction.remove(addServerFragment);
-        fragmentTransaction.commit();
-
-        floatingActionButton.show();
 
     }
 

app/src/main/java/net/schueller/peertube/fragment/AddServerFragment.java

@@ -1,180 +0,0 @@
-/*
- * Copyright (C) 2020 Stefan Schüller <sschueller@techdroid.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package net.schueller.peertube.fragment;
-
-import android.app.Activity;
-import android.content.Context;
-import android.content.Intent;
-import android.net.Uri;
-import android.os.Bundle;
-
-import androidx.annotation.NonNull;
-import androidx.fragment.app.Fragment;
-
-import android.text.TextUtils;
-import android.util.Log;
-import android.util.Patterns;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.view.inputmethod.InputMethodManager;
-import android.widget.Button;
-import android.widget.EditText;
-import android.widget.Toast;
-
-import net.schueller.peertube.R;
-import net.schueller.peertube.activity.SearchServerActivity;
-import net.schueller.peertube.activity.ServerAddressBookActivity;
-import net.schueller.peertube.helper.APIUrlHelper;
-
-import java.util.Objects;
-
-import static android.app.Activity.RESULT_OK;
-
-
-public class AddServerFragment extends Fragment {
-
-    public static final String TAG = "AddServerFragment";
-    public static final Integer PICK_SERVER = 1;
-
-    private OnFragmentInteractionListener mListener;
-
-    private View mView;
-
-    public AddServerFragment() {
-        // Required empty public constructor
-    }
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
-    }
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
-                             Bundle savedInstanceState) {
-        Log.d(TAG, "onCreateView");
-        // Inflate the layout for this fragment
-
-        mView = inflater.inflate(R.layout.fragment_add_server, container, false);
-
-        // bind button click
-        Button addServerButton = mView.findViewById(R.id.addServerButton);
-        addServerButton.setOnClickListener(view -> {
-
-            Activity act = getActivity();
-
-            boolean formValid = true;
-
-            // close keyboard
-            try {
-                assert act != null;
-                InputMethodManager inputManager = (InputMethodManager)
-                        act.getSystemService(Context.INPUT_METHOD_SERVICE);
-
-                inputManager.hideSoftInputFromWindow(Objects.requireNonNull(act.getCurrentFocus()).getWindowToken(),
-                        InputMethodManager.HIDE_NOT_ALWAYS);
-            } catch (Exception e) {
-
-            }
-
-            EditText selectedLabel = mView.findViewById(R.id.serverLabel);
-            if ( TextUtils.isEmpty(selectedLabel.getText())){
-                selectedLabel.setError( act.getString(R.string.server_book_label_is_required ));
-                Toast.makeText(act, R.string.invalid_url, Toast.LENGTH_LONG).show();
-                formValid = false;
-            }
-
-            // validate url
-            EditText selectedUrl = mView.findViewById(R.id.serverUrl);
-            String serverUrl = APIUrlHelper.cleanServerUrl(selectedUrl.getText().toString());
-            selectedUrl.setText(serverUrl);
-
-            if (!Patterns.WEB_URL.matcher(serverUrl).matches()) {
-                selectedUrl.setError( act.getString(R.string.server_book_valid_url_is_required ) );
-                Toast.makeText(act, R.string.invalid_url, Toast.LENGTH_LONG).show();
-                formValid = false;
-            }
-
-            if (formValid) {
-                if (act instanceof ServerAddressBookActivity) {
-                    ((ServerAddressBookActivity) act).addServer(mView);
-
-                }
-            }
-
-        });
-
-//        Button testServerButton = mView.findViewById(R.id.testServerButton);
-//        testServerButton.setOnClickListener(view -> {
-//            Activity act = getActivity();
-//            if (act instanceof ServerAddressBookActivity) {
-//                ((ServerAddressBookActivity) act).testServer();
-//            }
-//        });
-
-        Button pickServerUrl = mView.findViewById(R.id.pickServerUrl);
-        pickServerUrl.setOnClickListener(view -> {
-            Intent intentServer = new Intent(getActivity(), SearchServerActivity.class);
-            this.startActivityForResult(intentServer, PICK_SERVER);
-        });
-
-        return mView;
-    }
-
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
-        super.onActivityResult(requestCode, resultCode, data);
-        if (requestCode == PICK_SERVER) {
-            if(resultCode == RESULT_OK) {
-
-                String serverUrlTest = data.getStringExtra("serverUrl");
-                //Log.d(TAG, "serverUrl " + serverUrlTest);
-                EditText serverUrl = mView.findViewById(R.id.serverUrl);
-                serverUrl.setText(serverUrlTest);
-
-                EditText serverLabel = mView.findViewById(R.id.serverLabel);
-                if ("".equals(serverLabel.getText().toString())) {
-                    serverLabel.setText(data.getStringExtra("serverName"));
-                }
-
-            }
-        }
-    }
-
-    @Override
-    public void onAttach(@NonNull Context context) {
-        super.onAttach(context);
-        if (context instanceof OnFragmentInteractionListener) {
-            mListener = (OnFragmentInteractionListener) context;
-        } else {
-            throw new RuntimeException(context.toString()
-                    + " must implement OnFragmentInteractionListener");
-        }
-    }
-
-    @Override
-    public void onDetach() {
-        super.onDetach();
-        mListener = null;
-    }
-
-    public interface OnFragmentInteractionListener {
-        // TODO: Update argument type and name
-        void onFragmentInteraction(Uri uri);
-    }
-}

app/src/main/java/net/schueller/peertube/fragment/AddServerFragment.kt

@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2020 Stefan Schüller <sschueller@techdroid.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package net.schueller.peertube.fragment
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import android.util.Patterns
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
+import net.schueller.peertube.R
+import net.schueller.peertube.activity.SearchServerActivity
+import net.schueller.peertube.database.Server
+import net.schueller.peertube.database.ServerViewModel
+import net.schueller.peertube.databinding.FragmentAddServerBinding
+import net.schueller.peertube.helper.APIUrlHelper
+import net.schueller.peertube.utils.hideKeyboard
+
+class AddServerFragment : Fragment() {
+
+
+    private lateinit var mBinding: FragmentAddServerBinding
+
+    private val mServerViewModel: ServerViewModel by activityViewModels()
+
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        Log.d(TAG, "onCreateView")
+        // Inflate the layout for this fragment
+        mBinding = FragmentAddServerBinding.inflate(inflater, container, false)
+        return mBinding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        // bind button click
+
+        mBinding.addServerButton.setOnClickListener { view: View? ->
+            var formValid = true
+
+            hideKeyboard()
+
+
+            if (mBinding.serverLabel.text.toString().isNullOrBlank()) {
+                mBinding.serverLabel.error = getString(R.string.server_book_label_is_required)
+                Toast.makeText(context, R.string.invalid_url, Toast.LENGTH_LONG).show()
+                formValid = false
+            }
+
+            // validate url
+
+            mBinding.serverUrl.apply {
+                APIUrlHelper.cleanServerUrl(text.toString())?.let {
+
+                    setText(it)
+
+                    if (!Patterns.WEB_URL.matcher(it).matches()) {
+                        error = getString(R.string.server_book_valid_url_is_required)
+                        Toast.makeText(context, R.string.invalid_url, Toast.LENGTH_LONG).show()
+                        formValid = false
+                    }
+                }
+            }
+
+
+            if (formValid) {
+                mBinding.apply {
+                    val server = Server(serverLabel.text.toString())
+
+                    server.serverHost = serverUrl.text.toString()
+                    server.username = serverUsername.text.toString()
+                    server.password = serverPassword.text.toString()
+
+                    mServerViewModel.insert(server)
+                }
+            }
+        }
+
+//        Button testServerButton = mView.findViewById(R.id.testServerButton);
+//        testServerButton.setOnClickListener(view -> {
+//            Activity act = getActivity();
+//            if (act instanceof ServerAddressBookActivity) {
+//                ((ServerAddressBookActivity) act).testServer();
+//            }
+//        });
+
+
+        mBinding.pickServerUrl.setOnClickListener {
+            val intentServer = Intent(activity, SearchServerActivity::class.java)
+            this.startActivityForResult(intentServer, PICK_SERVER)
+        }
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+
+        if (requestCode != PICK_SERVER) {
+            return
+        }
+
+        if (resultCode != Activity.RESULT_OK) {
+            return
+        }
+
+        val serverUrlTest = data?.getStringExtra("serverUrl")
+        //Log.d(TAG, "serverUrl " + serverUrlTest);
+
+        mBinding.serverUrl.setText(serverUrlTest)
+
+        mBinding.serverLabel.apply {
+            if (text.toString().isBlank()) {
+                setText(data?.getStringExtra("serverName"))
+            }
+        }
+
+    }
+
+    companion object {
+        const val TAG = "AddServerFragment"
+        const val PICK_SERVER = 1
+    }
+}

app/src/main/java/net/schueller/peertube/utils/Extensions.kt

@@ -0,0 +1,24 @@
+package net.schueller.peertube.utils
+
+import android.content.Context
+import android.view.inputmethod.InputMethodManager
+import androidx.appcompat.app.AppCompatActivity
+import androidx.fragment.app.Fragment
+
+fun Fragment.hideKeyboard(): Boolean {
+    activity?.currentFocus?.let {
+        val imm = context?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+        imm.hideSoftInputFromWindow(it.windowToken, 0)
+        return true
+    }
+    return false
+}
+
+fun AppCompatActivity.hideKeyboard(): Boolean {
+    currentFocus?.let {
+        val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+        imm.hideSoftInputFromWindow(it.windowToken, 0)
+        return true
+    }
+    return false
+}

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

@@ -14,7 +14,9 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="@android:color/darker_gray"
-        tools:listitem="@layout/row_server_address_book" />
+        tools:listitem="@layout/row_server_address_book"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+        />
 
 
 

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

@@ -19,28 +19,29 @@
         android:hint="@string/server_book_add_label"
         android:inputType="textPersonName" />
 
-    <RelativeLayout
+    <LinearLayout
         android:layout_height="wrap_content"
-        android:layout_width="wrap_content">
+        android:layout_width="match_parent"
+        android:orientation="horizontal"
+        >
 
         <EditText
-            android:layout_alignParentStart="true"
             android:id="@+id/serverUrl"
-            android:layout_width="fill_parent"
+            android:layout_width="0dp"
             android:layout_height="wrap_content"
+            android:layout_weight="1"
             android:ems="10"
             android:hint="@string/server_book_add_server_url"
             android:inputType="textUri"
-            android:layout_toStartOf="@+id/pickServerUrl"/>
+            />
 
         <Button
-            android:layout_alignParentEnd="true"
             android:id="@+id/pickServerUrl"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="@string/server_book_add_pick_server_button" />
 
-    </RelativeLayout>
+    </LinearLayout>
 
     <EditText
         android:id="@+id/serverUsername"

build.gradle

@@ -1,6 +1,8 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+
+    ext.kotlin_version = '1.4.21'
     
     repositories {
         google()
@@ -8,6 +10,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.1.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         
 
         // NOTE: Do not place your application dependencies here; they belong