some tests

app/src/main/AndroidManifest.xml

@@ -8,6 +8,7 @@
         tools:ignore="QueryAllPackagesPermission" />
     <uses-permission android:name="android.permission.ACCESS_HIDDEN_PROFILES" />
     <uses-permission android:name="android.permission.EXPAND_STATUS_BAR" />
+    <!--<uses-permission android:name="android.permission.BIND_APPWIDGET" />-->
 
     <application
         android:name=".Application"

app/src/main/java/de/jrpie/android/launcher/Application.kt

@@ -12,6 +12,8 @@ import android.os.Build.VERSION_CODES
 import android.os.UserHandle
 import androidx.core.content.ContextCompat
 import androidx.lifecycle.MutableLiveData
+import android.appwidget.AppWidgetHost
+import android.appwidget.AppWidgetManager
 import androidx.preference.PreferenceManager
 import de.jrpie.android.launcher.actions.TorchManager
 import de.jrpie.android.launcher.apps.AbstractAppInfo
@@ -24,9 +26,15 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
+
+const val APP_WIDGET_HOST_ID = 42;
+
+
 class Application : android.app.Application() {
     val apps = MutableLiveData<List<AbstractDetailedAppInfo>>()
     val privateSpaceLocked = MutableLiveData<Boolean>()
+    lateinit var appWidgetHost: AppWidgetHost
+    lateinit var appWidgetManager: AppWidgetManager
 
     private val profileAvailabilityBroadcastReceiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context?, intent: Intent?) {
@@ -103,10 +111,15 @@ class Application : android.app.Application() {
             torchManager = TorchManager(this)
         }
 
+        appWidgetHost = AppWidgetHost(this.applicationContext, APP_WIDGET_HOST_ID)
+        appWidgetManager = AppWidgetManager.getInstance(this.applicationContext)
+
+        appWidgetHost.startListening()
+
+
         val preferences = PreferenceManager.getDefaultSharedPreferences(this)
         LauncherPreferences.init(preferences, this.resources)
 
-
         // Try to restore old preferences
         migratePreferencesToNewVersion(this)
 
@@ -157,4 +170,10 @@ class Application : android.app.Application() {
             apps.postValue(getApps(packageManager, applicationContext))
         }
     }
+
+    override fun onTerminate() {
+        appWidgetHost.stopListening()
+        super.onTerminate()
+
+    }
 }

app/src/main/java/de/jrpie/android/launcher/Functions.kt

@@ -6,6 +6,9 @@ import android.app.role.RoleManager
 import android.content.ActivityNotFoundException
 import android.content.ClipData
 import android.content.ClipboardManager
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.appwidget.AppWidgetProviderInfo
 import android.content.Context
 import android.content.Intent
 import android.content.pm.LauncherApps

app/src/main/java/de/jrpie/android/launcher/preferences/LauncherPreferences$Config.java

@@ -8,6 +8,7 @@ import de.jrpie.android.launcher.actions.lock.LockMethod;
 import de.jrpie.android.launcher.preferences.serialization.MapAbstractAppInfoStringPreferenceSerializer;
 import de.jrpie.android.launcher.preferences.serialization.SetAbstractAppInfoPreferenceSerializer;
 import de.jrpie.android.launcher.preferences.serialization.SetPinnedShortcutInfoPreferenceSerializer;
+import de.jrpie.android.launcher.preferences.serialization.SetWidgetInfoSerializer;
 import de.jrpie.android.launcher.preferences.theme.Background;
 import de.jrpie.android.launcher.preferences.theme.ColorTheme;
 import de.jrpie.android.launcher.preferences.theme.Font;
@@ -26,6 +27,7 @@ import eu.jonahbauer.android.preference.annotations.Preferences;
                         @Preference(name = "started_time", type = long.class),
                         // see PREFERENCE_VERSION in de.jrpie.android.launcher.preferences.Preferences.kt
                         @Preference(name = "version_code", type = int.class, defaultValue = "-1"),
+                        @Preference(name = "widgets", type = Set.class, serializer = SetWidgetInfoSerializer.class)
                 }),
                 @PreferenceGroup(name = "apps", prefix = "settings_apps_", suffix = "_key", value = {
                         @Preference(name = "favorites", type = Set.class, serializer = SetAbstractAppInfoPreferenceSerializer.class),

app/src/main/java/de/jrpie/android/launcher/preferences/serialization/PreferenceSerializers.kt

@@ -4,6 +4,7 @@ package de.jrpie.android.launcher.preferences.serialization
 
 import de.jrpie.android.launcher.apps.AbstractAppInfo
 import de.jrpie.android.launcher.apps.PinnedShortcutInfo
+import de.jrpie.android.launcher.widgets.WidgetInfo
 import eu.jonahbauer.android.preference.annotations.serializer.PreferenceSerializationException
 import eu.jonahbauer.android.preference.annotations.serializer.PreferenceSerializer
 import kotlinx.serialization.Serializable
@@ -28,6 +29,24 @@ class SetAbstractAppInfoPreferenceSerializer :
     }
 }
 
+
+@Suppress("UNCHECKED_CAST")
+class SetWidgetInfoSerializer :
+    PreferenceSerializer<java.util.Set<WidgetInfo>?, java.util.Set<java.lang.String>?> {
+    @Throws(PreferenceSerializationException::class)
+    override fun serialize(value: java.util.Set<WidgetInfo>?): java.util.Set<java.lang.String> {
+        return value?.map(WidgetInfo::serialize)
+            ?.toHashSet() as java.util.Set<java.lang.String>
+    }
+
+    @Throws(PreferenceSerializationException::class)
+    override fun deserialize(value: java.util.Set<java.lang.String>?): java.util.Set<WidgetInfo>? {
+        return value?.map(java.lang.String::toString)?.map(WidgetInfo::deserialize)
+            ?.toHashSet() as? java.util.Set<WidgetInfo>
+    }
+}
+
+
 @Suppress("UNCHECKED_CAST")
 class SetPinnedShortcutInfoPreferenceSerializer :
     PreferenceSerializer<java.util.Set<PinnedShortcutInfo>?, java.util.Set<java.lang.String>?> {

app/src/main/java/de/jrpie/android/launcher/ui/HomeActivity.kt

@@ -9,9 +9,12 @@ import android.os.Bundle
 import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.View
+import android.view.ViewGroup
 import android.window.OnBackInvokedDispatcher
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.isVisible
+import androidx.core.view.marginTop
+import de.jrpie.android.launcher.Application
 import de.jrpie.android.launcher.R
 import de.jrpie.android.launcher.actions.Action
 import de.jrpie.android.launcher.actions.Gesture
@@ -20,7 +23,13 @@ import de.jrpie.android.launcher.databinding.HomeBinding
 import de.jrpie.android.launcher.openTutorial
 import de.jrpie.android.launcher.preferences.LauncherPreferences
 import de.jrpie.android.launcher.ui.tutorial.TutorialActivity
+import de.jrpie.android.launcher.widgets.bindAppWidget
+import de.jrpie.android.launcher.widgets.createAppWidgetView
+import de.jrpie.android.launcher.widgets.deleteAllWidgets
+import de.jrpie.android.launcher.widgets.getAppWidgetProviders
 import java.util.Locale
+import kotlin.math.absoluteValue
+import kotlin.random.Random
 
 /**
  * [HomeActivity] is the actual application Launcher,
@@ -73,6 +82,17 @@ class HomeActivity : UIObject, AppCompatActivity() {
         binding.buttonFallbackSettings.setOnClickListener {
             LauncherAction.SETTINGS.invoke(this)
         }
+
+        deleteAllWidgets(this)
+
+        LauncherPreferences.internal().widgets().forEach { widget ->
+            createAppWidgetView(this,  widget)?.let {
+                binding.homeWidgetContainer.addView(it)
+            }
+        }
+
+        // TODO: appWidgetHost.deleteAppWidgetId(appWidgetId)
+
     }
 
     override fun onConfigurationChanged(newConfig: Configuration) {

app/src/main/java/de/jrpie/android/launcher/ui/widgets/WidgetContainerView.kt

@@ -0,0 +1,12 @@
+package de.jrpie.android.launcher.ui.widgets
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.LinearLayout
+
+// TODO: implement layout logic instead of linear layout
+class WidgetContainerView(context: Context, attrs: AttributeSet?): LinearLayout(context, attrs) {
+    init {
+        orientation = VERTICAL
+    }
+}

app/src/main/java/de/jrpie/android/launcher/widgets/WidgetInfo.kt

@@ -0,0 +1,28 @@
+package de.jrpie.android.launcher.widgets;
+
+import de.jrpie.android.launcher.apps.AbstractAppInfo
+import kotlinx.serialization.SerialName;
+import kotlinx.serialization.Serializable;
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+
+@Serializable
+@SerialName("widget")
+class WidgetInfo(val id: Int, val width: Int, val height: Int) {
+    fun serialize(): String {
+        return Json.encodeToString(this)
+    }
+
+    override fun hashCode(): Int {
+        return id
+    }
+
+    override fun equals(other: Any?): Boolean {
+        return (other as? WidgetInfo)?.id == id
+    }
+    companion object {
+        fun deserialize(serialized: String): WidgetInfo {
+            return Json.decodeFromString(serialized)
+        }
+    }
+}

app/src/main/java/de/jrpie/android/launcher/widgets/Widgets.kt

@@ -0,0 +1,123 @@
+package de.jrpie.android.launcher.widgets
+
+import android.app.Activity
+import android.app.Service
+import android.appwidget.AppWidgetHostView
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProviderInfo
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+import android.os.Bundle
+import android.os.UserManager
+import android.util.Log
+import de.jrpie.android.launcher.Application
+import de.jrpie.android.launcher.preferences.LauncherPreferences
+import kotlin.math.absoluteValue
+import kotlin.random.Random
+
+fun deleteAllWidgets(activity: Activity) {
+    val appWidgetHost = (activity.application as Application).appWidgetHost
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+        appWidgetHost.appWidgetIds.forEach { deleteAppWidget(activity, WidgetInfo(it, 0,0)) }
+    }
+}
+
+fun bindAppWidget(activity: Activity, providerInfo: AppWidgetProviderInfo): WidgetInfo? {
+    val appWidgetHost = (activity.application as Application).appWidgetHost
+    val appWidgetManager = (activity.application as Application).appWidgetManager
+    val appWidgetId = appWidgetHost.allocateAppWidgetId()
+
+    Log.i("Launcher", "Binding new widget ${appWidgetId}")
+    if (!appWidgetManager.bindAppWidgetIdIfAllowed(
+            appWidgetId,
+            providerInfo.provider
+        )
+    ) {
+        requestAppWidgetPermission(activity, appWidgetId, providerInfo)
+        return null
+    }
+    try {
+        Log.e("widgets", "configure widget")
+        appWidgetHost.startAppWidgetConfigureActivityForResult(activity, appWidgetId, 0, 1, null)
+    } catch (e: Exception) {
+        e.printStackTrace()
+    }
+
+    val widget = WidgetInfo(appWidgetId, 500, 500)
+    LauncherPreferences.internal().widgets(
+        (LauncherPreferences.internal().widgets() ?: HashSet()).also {
+            it.add(widget)
+        }
+    )
+
+
+    return widget
+}
+
+fun deleteAppWidget(activity: Activity, widget: WidgetInfo) {
+    Log.i("Launcher", "Deleting widget ${widget.id}")
+    val appWidgetHost = (activity.application as Application).appWidgetHost
+
+    appWidgetHost.deleteAppWidgetId(widget.id)
+
+    LauncherPreferences.internal().widgets(
+        LauncherPreferences.internal().widgets()?.also {
+            it.remove(widget)
+        }
+    )
+}
+
+fun createAppWidgetView(activity: Activity, widget: WidgetInfo): AppWidgetHostView? {
+    val appWidgetHost = (activity.application as Application).appWidgetHost
+    val appWidgetManager = (activity.application as Application).appWidgetManager
+    val providerInfo = appWidgetManager.getAppWidgetInfo(widget.id) ?: return null
+    val view = appWidgetHost.createView(activity, widget.id, providerInfo)
+        .apply {
+            setAppWidget(appWidgetId, appWidgetInfo)
+        }
+
+
+    val newOptions = Bundle().apply {
+        putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH, widget.width)
+        putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH, widget.width)
+        putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT, widget.height)
+        putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT, widget.height)
+    }
+    appWidgetManager.updateAppWidgetOptions(
+        widget.id,
+        newOptions
+    )
+    //view.minimumWidth = widget.width
+    //view.minimumHeight = widget.height
+
+    return view
+}
+
+fun getAppWidgetProviders(context: Context): List<AppWidgetProviderInfo> {
+    return appWidgetProviders(context, (context.applicationContext as Application).appWidgetManager)
+}
+
+fun requestAppWidgetPermission(context: Activity, widgetId: Int, info: AppWidgetProviderInfo) {
+    val intent = Intent(AppWidgetManager.ACTION_APPWIDGET_BIND).apply {
+        putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId)
+        putExtra(AppWidgetManager.EXTRA_APPWIDGET_PROVIDER, info.provider)
+    }
+    context.startActivityForResult(intent, 0)//REQUEST_CODE_BIND_WIDGET)
+}
+
+fun appWidgetProviders(
+    context: Context,
+    appWidgetManager: AppWidgetManager
+): List<AppWidgetProviderInfo> {
+    val userManager = context.getSystemService(Service.USER_SERVICE) as UserManager
+    return userManager.userProfiles.map {
+        appWidgetManager.getInstalledProvidersForProfile(it)
+    }.flatten()
+}
+fun Activity.bindRandomWidget() {
+    val selectedWidget =
+        getAppWidgetProviders(this).let { it.get(Random.nextInt().absoluteValue % it.size) }
+    bindAppWidget(this, selectedWidget) ?: return
+}
+

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

@@ -9,6 +9,15 @@
     android:longClickable="false"
     android:fitsSystemWindows="true"
     tools:context=".ui.HomeActivity">
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" >
+    <de.jrpie.android.launcher.ui.widgets.WidgetContainerView
+        android:id="@+id/home_widget_container"
+        android:paddingLeft="20dp"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+    </ScrollView>
 
     <TextClock
         android:id="@+id/home_upper_view"

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

@@ -9,6 +9,7 @@
         <string name="settings_internal_started_key" translatable="false">internal.started_before</string>
         <string name="settings_internal_started_time_key" translatable="false">internal.first_startup</string>
         <string name="settings_internal_version_code_key" translatable="false">internal.version_code</string>
+        <string name="settings_internal_widgets_key" translatable="false">internal.widgets</string>
         <string name="settings_apps_favorites_key" translatable="false">apps.favorites</string>
         <string name="settings_apps_hidden_key" translatable="false">apps.hidden</string>
         <string name="settings_apps_pinned_shortcuts_key" translatable="false">apps.pinned_shortcuts</string>