[feature] allow to ignore battery optimizations

app/src/main/AndroidManifest.xml

@@ -12,9 +12,10 @@
     <uses-permission android:name="android.permission.MANAGE_SUBSCRIPTION_USER_ASSOCIATION" />
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.RECEIVE_SMS" />
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
     <uses-permission android:name="android.permission.SEND_SMS" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
-    <uses-permission android:name="android.permission.RECEIVE_SMS" />
 
     <application
         android:name=".App"

app/src/main/java/me/capcom/smsgateway/ui/SettingsFragment.kt

@@ -1,7 +1,15 @@
 package me.capcom.smsgateway.ui
 
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
 import android.os.Bundle
+import android.os.PowerManager
+import android.provider.Settings
 import android.text.InputType
+import android.widget.Toast
+import androidx.annotation.RequiresApi
 import androidx.core.content.edit
 import androidx.preference.EditTextPreference
 import androidx.preference.Preference
@@ -28,6 +36,15 @@ class SettingsFragment : PreferenceFragmentCompat() {
 
         findPreference<Preference>("transient.app_version")?.summary =
             "${BuildConfig.VERSION_NAME} (${BuildConfig.VERSION_CODE})"
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+            findPreference<Preference>("system")?.isEnabled = false
+            findPreference<Preference>("system.disable_battery_optimizations")?.summary =
+                getString(R.string.battery_optimizations_not_supported_on_this_device)
+        } else {
+            findPreference<Preference>("system.disable_battery_optimizations")?.summary =
+                if (isIgnoringBatteryOptimizations()) getString(R.string.disabled) else getString(R.string.enabled)
+        }
     }
 
     override fun onDisplayPreferenceDialog(preference: Preference) {
@@ -62,6 +79,45 @@ class SettingsFragment : PreferenceFragmentCompat() {
         super.onDisplayPreferenceDialog(preference)
     }
 
+    override fun onPreferenceTreeClick(preference: Preference): Boolean {
+        if (preference.key == "system.disable_battery_optimizations") {
+            requestIgnoreBatteryOptimizations()
+            return true
+        }
+
+        return super.onPreferenceTreeClick(preference)
+    }
+
+    private fun requestIgnoreBatteryOptimizations() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+            Toast.makeText(
+                requireContext(),
+                getString(R.string.battery_optimizations_not_supported_on_this_device),
+                Toast.LENGTH_SHORT
+            ).show()
+            return
+        }
+
+        if (isIgnoringBatteryOptimizations()) {
+            Toast.makeText(
+                requireContext(),
+                getString(R.string.battery_optimizations_already_disabled),
+                Toast.LENGTH_SHORT
+            ).show()
+            return
+        }
+
+        val intent = Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS)
+        intent.data = Uri.parse("package:${requireContext().packageName}")
+        startActivity(intent)
+    }
+
+    @RequiresApi(Build.VERSION_CODES.M)
+    private fun isIgnoringBatteryOptimizations(): Boolean {
+        val powerManager = requireContext().getSystemService(Context.POWER_SERVICE) as PowerManager
+        return powerManager.isIgnoringBatteryOptimizations(requireContext().packageName)
+    }
+
     companion object {
         fun newInstance() = SettingsFragment()
     }

app/src/main/res/drawable-notnight/ic_battery_optimizations.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="@color/black"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M16,4h-2V2h-4v2H8C7.45,4 7,4.45 7,5v16c0,0.55 0.45,1 1,1h8c0.55,0 1,-0.45 1,-1V5C17,4.45 16.55,4 16,4zM15,14h-2v2h-2v-2H9v-2h2v-2h2v2h2V14z" />
+</vector>

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

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M16,4h-2V2h-4v2H8C7.45,4 7,4.45 7,5v16c0,0.55 0.45,1 1,1h8c0.55,0 1,-0.45 1,-1V5C17,4.45 16.55,4 16,4zM15,14h-2v2h-2v-2H9v-2h2v-2h2v2h2V14z" />
+</vector>

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

@@ -59,4 +59,11 @@
     <string name="password">Password:</string>
     <string name="server_address">Server address:</string>
     <string name="to_apply_the_changes_restart_the_app_using_the_button_below">To apply the changes, restart the app using the button below.</string>
+    <string name="system">System</string>
+    <string name="can_affect_battery_life">can affect battery life</string>
+    <string name="disable_battery_optimizations">Disable battery optimizations</string>
+    <string name="disabled">Disabled</string>
+    <string name="enabled">Enabled</string>
+    <string name="battery_optimizations_not_supported_on_this_device">Battery optimizations not supported on this device</string>
+    <string name="battery_optimizations_already_disabled">Battery optimizations already disabled</string>
 </resources>

app/src/main/res/xml/root_preferences.xml

@@ -62,6 +62,16 @@
             app:useSimpleSummaryProvider="true" />
     </PreferenceCategory>
 
+    <PreferenceCategory
+        app:key="system"
+        app:title="@string/system">
+        <Preference
+            android:icon="@drawable/ic_battery_optimizations"
+            app:key="system.disable_battery_optimizations"
+            app:summary="@string/can_affect_battery_life"
+            app:title="@string/disable_battery_optimizations" />
+    </PreferenceCategory>
+
     <PreferenceCategory app:title="@string/information">
         <Preference
             android:key="transient.app_version"

build.gradle

@@ -9,7 +9,7 @@ buildscript {
 plugins {
     id 'com.android.application' version '8.1.2' apply false
     id 'com.android.library' version '8.1.2' apply false
-    id 'org.jetbrains.kotlin.android' version '1.7.0' apply false
+    id 'org.jetbrains.kotlin.android' version '1.7.22' apply false
 }
 
 task clean(type: Delete) {