Added Navigation library to Reference app. (#533)

* Added Navigation library to Reference app. Also updated the patient details page

* Review comment changes

* Spotless apply

reference/build.gradle.kts

@@ -2,6 +2,7 @@ plugins {
   id(Plugins.BuildPlugins.application)
   id(Plugins.BuildPlugins.kotlinAndroid)
   id(Plugins.BuildPlugins.kotlinKapt)
+  id(Plugins.BuildPlugins.navSafeArgs)
 }
 
 android {

reference/src/main/AndroidManifest.xml

@@ -30,7 +30,7 @@
         android:theme="@style/AppTheme"
     >
         <activity
-            android:name="com.google.android.fhir.reference.PatientListActivity"
+            android:name="com.google.android.fhir.reference.MainActivity"
             android:label="@string/title_patient_list"
             android:theme="@style/AppTheme.NoActionBar"
         >
@@ -40,17 +40,6 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        <activity
-            android:name="com.google.android.fhir.reference.PatientDetailActivity"
-            android:label="@string/title_patient_detail"
-            android:parentActivityName="com.google.android.fhir.reference.PatientListActivity"
-            android:theme="@style/AppTheme.NoActionBar"
-        >
-            <meta-data
-                android:name="android.support.PARENT_ACTIVITY"
-                android:value="com.google.android.fhir.reference.PatientListActivity"
-            />
-        </activity>
     </application>
     <uses-permission android:name="android.permission.INTERNET" />
 </manifest>

reference/src/main/java/com/google/android/fhir/reference/MainActivity.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.fhir.reference
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.Toolbar
+import androidx.work.Constraints
+import com.google.android.fhir.reference.data.FhirPeriodicSyncWorker
+import com.google.android.fhir.sync.PeriodicSyncConfiguration
+import com.google.android.fhir.sync.RepeatInterval
+import com.google.android.fhir.sync.Sync
+import java.util.concurrent.TimeUnit
+
+const val MAX_RESOURCE_COUNT = 20
+
+class MainActivity : AppCompatActivity() {
+
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    setContentView(R.layout.activity_main)
+
+    val toolbar = findViewById<Toolbar>(R.id.toolbar)
+    setSupportActionBar(toolbar)
+    toolbar.title = title
+
+    Sync.periodicSync<FhirPeriodicSyncWorker>(
+      this,
+      PeriodicSyncConfiguration(
+        syncConstraints = Constraints.Builder().build(),
+        repeat = RepeatInterval(interval = 1, timeUnit = TimeUnit.MINUTES)
+      )
+    )
+  }
+}

reference/src/main/java/com/google/android/fhir/reference/PatientDetailsFragment.kt

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.fhir.reference
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.MenuItem
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.text.HtmlCompat
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import androidx.navigation.fragment.NavHostFragment
+import androidx.navigation.fragment.navArgs
+import androidx.recyclerview.widget.RecyclerView
+import com.google.android.fhir.FhirEngine
+
+/**
+ * A fragment representing a single Patient detail screen. This fragment is contained in a
+ * [MainActivity].
+ */
+class PatientDetailsFragment : Fragment() {
+  private lateinit var fhirEngine: FhirEngine
+  private lateinit var patientDetailsViewModel: PatientDetailsViewModel
+  private val args: PatientDetailsFragmentArgs by navArgs()
+
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    setHasOptionsMenu(true)
+  }
+
+  override fun onCreateView(
+    inflater: LayoutInflater,
+    container: ViewGroup?,
+    savedInstanceState: Bundle?
+  ): View? = inflater.inflate(R.layout.patient_detail, container, false)
+
+  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    super.onViewCreated(view, savedInstanceState)
+    val recyclerView: RecyclerView = view.findViewById(R.id.observation_list)
+    val adapter = ObservationItemRecyclerViewAdapter()
+    recyclerView.adapter = adapter
+    fhirEngine = FhirApplication.fhirEngine(requireContext())
+    patientDetailsViewModel =
+      ViewModelProvider(
+          this,
+          PatientDetailsViewModelFactory(requireActivity().application, fhirEngine, args.patientId)
+        )
+        .get(PatientDetailsViewModel::class.java)
+    patientDetailsViewModel.livePatientData.observe(viewLifecycleOwner) {
+      setupPatientData(view, it)
+    }
+    patientDetailsViewModel.livePatientObservation.observe(viewLifecycleOwner) {
+      adapter.submitList(it)
+    }
+  }
+
+  private fun setupPatientData(view: View, patient: PatientListViewModel.PatientItem?) {
+    patient?.let {
+      view.findViewById<TextView>(R.id.patient_detail).text =
+        HtmlCompat.fromHtml(it.html, HtmlCompat.FROM_HTML_MODE_LEGACY)
+      view.findViewById<TextView>(R.id.name).text = it.name
+      view.findViewById<TextView>(R.id.dob).text = it.dob
+      view.findViewById<TextView>(R.id.gender).text = it.phone
+
+      (requireActivity() as AppCompatActivity).supportActionBar?.apply {
+        title = it.name
+        setDisplayHomeAsUpEnabled(true)
+      }
+    }
+  }
+
+  override fun onOptionsItemSelected(item: MenuItem): Boolean {
+    return when (item.itemId) {
+      android.R.id.home -> {
+        NavHostFragment.findNavController(this).navigateUp()
+        true
+      }
+      else -> super.onOptionsItemSelected(item)
+    }
+  }
+
+  companion object {
+    /** The fragment argument representing the patient item ID that this fragment represents. */
+    const val ARG_ITEM_ID = "patient_item_id"
+  }
+}