Add:Start of app widget to control media playback

android/app/build.gradle

@@ -21,7 +21,11 @@ kotlin {
 }
 
 android {
-    kotlinOptions {
+
+  buildFeatures {
+    viewBinding true
+  }
+  kotlinOptions {
       freeCompilerArgs = ['-Xjvm-default=all']
     }
     compileSdkVersion rootProject.ext.compileSdkVersion

android/app/src/main/AndroidManifest.xml

@@ -1,83 +1,94 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  xmlns:dist="http://schemas.android.com/apk/distribution"
-  xmlns:tools="http://schemas.android.com/tools"
-  android:installLocation="preferExternal"
-  package="com.audiobookshelf.app">
+    xmlns:dist="http://schemas.android.com/apk/distribution"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.audiobookshelf.app"
+    android:installLocation="preferExternal" >
 
     <!-- Permissions -->
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.INTERNET" />
-
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="28" />
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="28" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:requestLegacyExternalStorage="true"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
-        android:usesCleartextTraffic="true"
-        android:networkSecurityConfig="@xml/network_security_config"
-        android:requestLegacyExternalStorage="true">
+        android:usesCleartextTraffic="true" >
+        <receiver
+            android:name=".NewAppWidget"
+            android:exported="true" >
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
 
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/new_app_widget_info" />
+        </receiver>
 
-        <!--Used by Android Auto-->
-        <meta-data android:name="com.google.android.gms.car.notification.SmallIcon"
-          android:resource="@drawable/icon" />
+        <!-- Used by Android Auto -->
         <meta-data
-          android:name="com.google.android.gms.car.application"
-          android:resource="@xml/automotive_app_desc"/>
-
-        <!-- Support for Cast -->
-        <meta-data android:name="com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"
-          android:value="com.audiobookshelf.app.CastOptionsProvider"/>
+            android:name="com.google.android.gms.car.notification.SmallIcon"
+            android:resource="@drawable/icon" />
+        <meta-data
+            android:name="com.google.android.gms.car.application"
+            android:resource="@xml/automotive_app_desc" /> <!-- Support for Cast -->
+        <meta-data
+            android:name="com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"
+            android:value="com.audiobookshelf.app.CastOptionsProvider" />
 
         <activity
+            android:name=".MainActivity"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|smallestScreenSize|screenLayout|uiMode"
-            android:name="com.audiobookshelf.app.MainActivity"
-            android:label="@string/title_activity_main"
             android:exported="true"
-            android:theme="@style/AppTheme.NoActionBarLaunch"
-            android:launchMode="singleTask">
+            android:label="@string/title_activity_main"
+            android:launchMode="singleTask"
+            android:theme="@style/AppTheme.NoActionBarLaunch" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
 
-          <intent-filter>
-              <action android:name="android.intent.action.MAIN" />
-              <category android:name="android.intent.category.LAUNCHER" />
-          </intent-filter>
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.media.action.MEDIA_PLAY_FROM_SEARCH" />
 
-          <intent-filter>
-            <action android:name="android.media.action.MEDIA_PLAY_FROM_SEARCH" />
-            <category android:name="android.intent.category.DEFAULT" />
-          </intent-filter>
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
 
-          <!-- Register URL scheme -->
-          <intent-filter>
-            <action android:name="android.intent.action.VIEW" />
-            <category android:name="android.intent.category.DEFAULT" />
-            <category android:name="android.intent.category.BROWSABLE" />
-            <data android:scheme="@string/custom_url_scheme" />
-          </intent-filter>
+            <!-- Register URL scheme -->
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data android:scheme="@string/custom_url_scheme" />
+            </intent-filter>
         </activity>
 
+        <receiver android:name="androidx.media.session.MediaButtonReceiver" >
+            <intent-filter>
+                <action android:name="android.intent.action.MEDIA_BUTTON" />
+            </intent-filter>
+        </receiver>
 
-      <receiver android:name="androidx.media.session.MediaButtonReceiver" >
-        <intent-filter>
-          <action android:name="android.intent.action.MEDIA_BUTTON" />
-        </intent-filter>
-      </receiver>
-
-      <service
-        android:exported="true"
-        android:enabled="true"
-        android:name=".player.PlayerNotificationService">
-        <intent-filter>
-          <action android:name="android.media.browse.MediaBrowserService"/>
-        </intent-filter>
-      </service>
-
+        <service
+            android:name=".player.PlayerNotificationService"
+            android:enabled="true"
+            android:exported="true" >
+            <intent-filter>
+                <action android:name="android.media.browse.MediaBrowserService" />
+            </intent-filter>
+        </service>
     </application>
 
 </manifest>

android/app/src/main/java/com/audiobookshelf/app/NewAppWidget.kt

@@ -0,0 +1,96 @@
+package com.audiobookshelf.app
+
+import android.app.PendingIntent
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.graphics.Bitmap
+import android.net.Uri
+import android.support.v4.media.session.PlaybackStateCompat.ACTION_PLAY_PAUSE
+import android.util.Log
+import android.widget.RemoteViews
+import androidx.media.session.MediaButtonReceiver.buildMediaButtonPendingIntent
+import com.audiobookshelf.app.device.DeviceManager
+import com.audiobookshelf.app.device.WidgetEventEmitter
+import com.audiobookshelf.app.player.PlayerNotificationService
+import com.bumptech.glide.Glide
+import com.bumptech.glide.request.RequestOptions
+import com.bumptech.glide.request.target.AppWidgetTarget
+import com.bumptech.glide.request.transition.Transition
+
+/**
+ * Implementation of App Widget functionality.
+ */
+class NewAppWidget : AppWidgetProvider() {
+  val tag = "NewAppWidget"
+
+    override fun onUpdate(context: Context, appWidgetManager: AppWidgetManager, appWidgetIds: IntArray) {
+        // There may be multiple widgets active, so update all of them
+        for (appWidgetId in appWidgetIds) {
+            updateAppWidget(context, appWidgetManager, appWidgetId, null,false)
+        }
+    }
+
+    override fun onEnabled(context: Context) {
+      Log.w(tag, "onEnabled check context ${context.packageName}")
+
+        // Enter relevant functionality for when the first widget is created
+      DeviceManager.widgetUpdater = (object : WidgetEventEmitter {
+        override fun onPlayerChanged(pns:PlayerNotificationService) {
+          val isPlaying = pns.currentPlayer.isPlaying
+          Log.i(tag, "onPlayerChanged | Is Playing? $isPlaying")
+
+          val appWidgetManager = AppWidgetManager.getInstance(context)
+          val componentName = ComponentName(context, NewAppWidget::class.java)
+          val ids = appWidgetManager.getAppWidgetIds(componentName)
+
+          val playbackSession = pns.getCurrentPlaybackSessionCopy()
+          val cover = playbackSession?.getCoverUri()
+
+          for (widgetId in ids) {
+            updateAppWidget(context, appWidgetManager, widgetId, cover, isPlaying)
+          }
+        }
+      })
+    }
+
+    override fun onDisabled(context: Context) {
+        // Enter relevant functionality for when the last widget is disabled
+    }
+}
+
+internal fun updateAppWidget(context: Context, appWidgetManager: AppWidgetManager, appWidgetId: Int, coverUri:Uri?, isPlaying:Boolean) {
+
+    val views = RemoteViews(context.packageName, R.layout.new_app_widget)
+
+    val playPausePI = buildMediaButtonPendingIntent(context, ACTION_PLAY_PAUSE)
+    views.setOnClickPendingIntent(R.id.playPauseIcon, playPausePI)
+
+    val wholeWidgetClickI = Intent(context, MainActivity::class.java)
+    wholeWidgetClickI.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_NEW_TASK
+    val wholeWidgetClickPI = PendingIntent.getActivity(
+      context,
+      System.currentTimeMillis().toInt(),
+      wholeWidgetClickI,
+      PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+    )
+    views.setOnClickPendingIntent(R.id.appWidget, wholeWidgetClickPI)
+
+    val imageUri = coverUri ?: Uri.parse("android.resource://com.audiobookshelf.app/" + R.drawable.icon)
+    val awt: AppWidgetTarget = object : AppWidgetTarget(context.applicationContext, R.id.imageView, views, appWidgetId) {
+      override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) {
+        super.onResourceReady(resource, transition)
+      }
+    }
+
+    val options = RequestOptions().override(300, 300).placeholder(R.drawable.icon).error(R.drawable.icon)
+    Glide.with(context.applicationContext).asBitmap().load(imageUri).apply(options).into(awt)
+
+    val playPauseResource = if (isPlaying) R.drawable.ic_media_pause_dark else R.drawable.ic_media_play_dark
+    views.setImageViewResource(R.id.playPauseIcon, playPauseResource)
+
+    // Instruct the widget manager to update the widget
+    appWidgetManager.updateAppWidget(appWidgetId, views)
+}

android/app/src/main/java/com/audiobookshelf/app/device/DeviceManager.kt

@@ -1,9 +1,12 @@
 package com.audiobookshelf.app.device
 
 import android.util.Log
-import com.audiobookshelf.app.data.DbManager
-import com.audiobookshelf.app.data.DeviceData
-import com.audiobookshelf.app.data.ServerConnectionConfig
+import com.audiobookshelf.app.data.*
+import com.audiobookshelf.app.player.PlayerNotificationService
+
+interface WidgetEventEmitter {
+  fun onPlayerChanged(pns:PlayerNotificationService)
+}
 
 object DeviceManager {
   const val tag = "DeviceManager"
@@ -19,6 +22,8 @@ object DeviceManager {
   val isConnectedToServer get() = serverConnectionConfig != null
   val hasLastServerConnectionConfig get() = deviceData.getLastServerConnectionConfig() != null
 
+  var widgetUpdater:WidgetEventEmitter? = null
+
   init {
     Log.d(tag, "Device Manager Singleton invoked")
   }

android/app/src/main/java/com/audiobookshelf/app/player/MediaSessionCallback.kt

@@ -132,8 +132,25 @@ class MediaSessionCallback(var playerNotificationService:PlayerNotificationServi
   }
 
   fun handleCallMediaButton(intent: Intent): Boolean {
+    Log.w(tag, "handleCallMediaButton $intent | ${intent.action}")
+
     if(Intent.ACTION_MEDIA_BUTTON == intent.action) {
       val keyEvent = intent.getParcelableExtra<KeyEvent>(Intent.EXTRA_KEY_EVENT)
+      Log.d(tag, "handleCallMediaButton keyEvent = $keyEvent | action ${keyEvent?.action}")
+
+      if (keyEvent?.action == KeyEvent.ACTION_DOWN) {
+        Log.d(tag, "handleCallMediaButton: key action_down for ${keyEvent.keyCode}")
+        when (keyEvent.keyCode) {
+          KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE -> {
+            Log.d(tag, "handleCallMediaButton: Media Play/Pause")
+            if (playerNotificationService.mPlayer.isPlaying) {
+              playerNotificationService.pause()
+            } else {
+              playerNotificationService.play()
+            }
+          }
+        }
+      }
 
       if (keyEvent?.action == KeyEvent.ACTION_UP) {
         Log.d(tag, "handleCallMediaButton: key action_up for ${keyEvent.keyCode}")

android/app/src/main/java/com/audiobookshelf/app/player/PlayerListener.kt

@@ -118,6 +118,8 @@ class PlayerListener(var playerNotificationService:PlayerNotificationService) :
       }
 
       playerNotificationService.clientEventEmitter?.onPlayingUpdate(player.isPlaying)
+
+      DeviceManager.widgetUpdater?.onPlayerChanged(playerNotificationService)
     }
   }
 

android/app/src/main/java/com/audiobookshelf/app/player/PlayerNotificationService.kt

@@ -210,6 +210,7 @@ class PlayerNotificationService : MediaBrowserServiceCompat()  {
       .apply {
         setSessionActivity(sessionActivityPendingIntent)
         isActive = true
+        setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS or MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS)
       }
 
     val mediaController = MediaControllerCompat(ctx, mediaSession.sessionToken)
@@ -768,7 +769,7 @@ class PlayerNotificationService : MediaBrowserServiceCompat()  {
   private val ANDROID_WEARABLE_PKG_NAME = "com.google.android.wearable.app"
   private val ANDROID_GSEARCH_PKG_NAME = "com.google.android.googlequicksearchbox"
   private val ANDROID_AUTOMOTIVE_PKG_NAME = "com.google.android.carassistant"
-  private val VALID_MEDIA_BROWSERS = mutableListOf<String>(ANDROID_AUTO_PKG_NAME, ANDROID_AUTO_SIMULATOR_PKG_NAME, ANDROID_WEARABLE_PKG_NAME, ANDROID_GSEARCH_PKG_NAME, ANDROID_AUTOMOTIVE_PKG_NAME)
+  private val VALID_MEDIA_BROWSERS = mutableListOf("com.audiobookshelf.app", "com.android.systemui", ANDROID_AUTO_PKG_NAME, ANDROID_AUTO_SIMULATOR_PKG_NAME, ANDROID_WEARABLE_PKG_NAME, ANDROID_GSEARCH_PKG_NAME, ANDROID_AUTOMOTIVE_PKG_NAME)
 
   private val AUTO_MEDIA_ROOT = "/"
   private val ALL_ROOT = "__ALL__"

android/app/src/main/res/drawable-v21/app_widget_background.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Background for widgets to make the rounded corners based on the
+appWidgetRadius attribute value
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <corners android:radius="?attr/appWidgetRadius" />
+    <solid android:color="?android:attr/colorBackground" />
+</shape>

android/app/src/main/res/drawable-v21/app_widget_inner_view_background.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Background for views inside widgets to make the rounded corners based on the
+appWidgetInnerRadius attribute value
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <corners android:radius="?attr/appWidgetInnerRadius" />
+    <solid android:color="?android:attr/colorPrimaryDark" />
+</shape>

android/app/src/main/res/layout/new_app_widget.xml

@@ -0,0 +1,26 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:app="http://schemas.android.com/apk/res-auto"
+  style="@style/Widget.Android.AppWidget.Container"
+    android:id="@+id/appWidget"
+    android:theme="@style/AppTheme.AppWidgetContainer"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+  <ImageView
+    android:id="@+id/imageView"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_centerInParent="true"
+    android:adjustViewBounds="true"
+    android:alpha="0.75"
+    android:contentDescription="Cover image"
+    android:visibility="visible" />
+
+  <ImageView
+    android:id="@+id/playPauseIcon"
+    android:layout_width="71dp"
+    android:layout_height="55dp"
+    android:layout_centerInParent="true"
+    app:srcCompat="@drawable/cast_ic_expanded_controller_play" />
+
+</RelativeLayout>

android/app/src/main/res/values-v21/styles.xml

@@ -0,0 +1,11 @@
+<resources>
+    <style name="Widget.Android.AppWidget.Container" parent="android:Widget">
+        <item name="android:padding">?attr/appWidgetPadding</item>
+        <item name="android:background">@drawable/app_widget_background</item>
+    </style>
+
+    <style name="Widget.Android.AppWidget.InnerView" parent="android:Widget">
+        <item name="android:padding">?attr/appWidgetPadding</item>
+        <item name="android:background">@drawable/app_widget_inner_view_background</item>
+    </style>
+</resources>

android/app/src/main/res/values/attrs.xml

@@ -0,0 +1,7 @@
+<resources>
+    <declare-styleable name="AppWidgetAttrs">
+        <attr name="appWidgetPadding" format="dimension" />
+        <attr name="appWidgetInnerRadius" format="dimension" />
+        <attr name="appWidgetRadius" format="dimension" />
+    </declare-styleable>
+</resources>

android/app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<resources>
+    <color name="light_blue_50">#FFE1F5FE</color>
+    <color name="light_blue_200">#FF81D4FA</color>
+    <color name="light_blue_600">#FF039BE5</color>
+    <color name="light_blue_900">#FF01579B</color>
+</resources>

android/app/src/main/res/values/dimens.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <!--
+Refer to App Widget Documentation for margin information
+http://developer.android.com/guide/topics/appwidgets/index.html#CreatingLayout
+    -->
+    <dimen name="widget_margin">0dp</dimen>
+
+</resources>

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

@@ -4,4 +4,6 @@
     <string name="title_activity_main">audiobookshelf</string>
     <string name="package_name">com.audiobookshelf.app</string>
     <string name="custom_url_scheme">com.audiobookshelf.app</string>
+    <string name="add_widget">Add widget</string>
+    <string name="app_widget_description">Simple widget for audiobookshelf playback</string>
 </resources>

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

@@ -19,4 +19,13 @@
     <style name="AppTheme.NoActionBarLaunch" parent="AppTheme.NoActionBar">
         <item name="android:background">@drawable/screen</item>
     </style>
+    <style name="Widget.Android.AppWidget.Container" parent="android:Widget">
+        <item name="android:id">@android:id/background</item>
+        <item name="android:background">?android:attr/colorBackground</item>
+    </style>
+
+    <style name="Widget.Android.AppWidget.InnerView" parent="android:Widget">
+        <item name="android:background">?android:attr/colorBackground</item>
+        <item name="android:textColor">?android:attr/textColorPrimary</item>
+    </style>
 </resources>

android/app/src/main/res/values/themes.xml

@@ -0,0 +1,17 @@
+<resources>
+    <style name="AppTheme.AppWidgetContainerParent" parent="@android:style/Theme.DeviceDefault">
+        <!-- Radius of the outer bound of widgets to make the rounded corners -->
+        <item name="appWidgetRadius">16dp</item>
+        <!--
+        Radius of the inner view's bound of widgets to make the rounded corners.
+        It needs to be 8dp or less than the value of appWidgetRadius
+        -->
+        <item name="appWidgetInnerRadius">8dp</item>
+    </style>
+
+    <style name="AppTheme.AppWidgetContainer"
+        parent="AppTheme.AppWidgetContainerParent">
+        <!-- Apply padding to avoid the content of the widget colliding with the rounded corners -->
+        <item name="appWidgetPadding">16dp</item>
+    </style>
+</resources>

android/app/src/main/res/xml/new_app_widget_info.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:minWidth="110dp"
+    android:minHeight="40dp"
+    android:updatePeriodMillis="86400000"
+    android:previewImage="@drawable/example_appwidget_preview"
+    android:initialLayout="@layout/new_app_widget"
+    android:description="@string/app_widget_description"
+    android:resizeMode="horizontal|vertical"
+    android:widgetCategory="home_screen"
+    android:initialKeyguardLayout="@layout/new_app_widget"
+/>