add dialog to disable battery optimization. WIP

this is just a quick&dirty approach for testing...

Signed-off-by: Marcel Hibbe <dev@mhibbe.de>

app/src/main/AndroidManifest.xml

@@ -79,6 +79,8 @@
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+
     <application
         android:name=".application.NextcloudTalkApplication"
         android:allowBackup="true"
@@ -87,9 +89,9 @@
         android:label="@string/nc_app_name"
         android:largeHeap="true"
         android:networkSecurityConfig="@xml/network_security_config"
+        android:requestLegacyExternalStorage="true"
         android:supportsRtl="true"
         android:theme="@style/AppTheme.Launcher"
-        android:requestLegacyExternalStorage="true"
         tools:ignore="UnusedAttribute"
         tools:replace="label, icon, theme, name, allowBackup">
 
@@ -127,41 +129,38 @@
 
         <activity
             android:name=".activities.CallActivity"
-            android:theme="@style/AppTheme.CallLauncher"
-            android:supportsPictureInPicture="true"
             android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"
-            android:launchMode="singleTask"
-            android:taskAffinity=".call"
             android:excludeFromRecents="true"
-            android:showOnLockScreen="true"/>
+            android:launchMode="singleTask"
+            android:showOnLockScreen="true"
+            android:supportsPictureInPicture="true"
+            android:taskAffinity=".call"
+            android:theme="@style/AppTheme.CallLauncher" />
 
         <activity
             android:name=".activities.CallNotificationActivity"
-            android:theme="@style/AppTheme.CallLauncher"
-            android:supportsPictureInPicture="true"
             android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"
-            android:launchMode="singleTask"
-            android:taskAffinity=".call"
             android:excludeFromRecents="true"
-            android:showOnLockScreen="true" />
+            android:launchMode="singleTask"
+            android:showOnLockScreen="true"
+            android:supportsPictureInPicture="true"
+            android:taskAffinity=".call"
+            android:theme="@style/AppTheme.CallLauncher" />
 
         <activity
             android:name=".activities.FullScreenImageActivity"
-            android:theme="@style/FullScreenImageTheme"
+            android:configChanges="orientation|keyboardHidden|screenSize"
-            android:configChanges="orientation|keyboardHidden|screenSize">
+            android:theme="@style/FullScreenImageTheme"></activity>
-        </activity>
 
         <activity
             android:name=".activities.FullScreenMediaActivity"
-            android:theme="@style/FullScreenMediaTheme"
+            android:configChanges="orientation|keyboardHidden|screenSize"
-            android:configChanges="orientation|keyboardHidden|screenSize">
+            android:theme="@style/FullScreenMediaTheme"></activity>
-        </activity>
 
         <activity
             android:name=".activities.FullScreenTextViewerActivity"
-            android:theme="@style/FullScreenTextTheme"
+            android:configChanges="orientation|keyboardHidden|screenSize"
-            android:configChanges="orientation|keyboardHidden|screenSize">
+            android:theme="@style/FullScreenTextTheme"></activity>
-        </activity>
 
         <activity
             android:name=".activities.TakePhotoActivity"

app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java

@@ -93,6 +93,7 @@ import com.nextcloud.talk.utils.DisplayUtils;
 import com.nextcloud.talk.utils.UriUtils;
 import com.nextcloud.talk.utils.bundle.BundleKeys;
 import com.nextcloud.talk.utils.database.user.UserUtils;
+import com.nextcloud.talk.utils.power.PowerManagerUtil;
 import com.nextcloud.talk.utils.preferences.AppPreferences;
 import com.webianks.library.PopupBubble;
 import com.yarolegovich.lovelydialog.LovelySaveStateHandler;
@@ -253,6 +254,10 @@ public class ConversationsListController extends BaseController implements Searc
 
         adapter.addListener(this);
         prepareViews();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            new PowerManagerUtil().askForBatteryOptimization(getActivity());
+        }
     }
 
     private void loadUserAvatar(MaterialButton button) {

app/src/main/java/com/nextcloud/talk/utils/power/PowerManagerUtil.kt

@@ -0,0 +1,57 @@
+package com.nextcloud.talk.utils.power
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.Context.POWER_SERVICE
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
+import android.os.PowerManager
+import android.provider.Settings
+import androidx.annotation.RequiresApi
+import androidx.appcompat.app.AlertDialog
+import androidx.lifecycle.LifecycleObserver
+import com.nextcloud.talk.BuildConfig
+import com.nextcloud.talk.R
+
+class PowerManagerUtil : LifecycleObserver {
+
+    @RequiresApi(Build.VERSION_CODES.M)
+    fun askForBatteryOptimization(context: Context) {
+        if (checkIfBatteryOptimizationEnabled(context)) {
+            val alertDialogBuilder = AlertDialog.Builder(context, R.style.Theme_ownCloud_Dialog)
+                .setTitle("Battery optimization")
+                .setMessage(
+                    "Your device may have battery optimization enabled. Notifications work only properly if " +
+                        "you exclude this app from it."
+                )
+                .setPositiveButton("disable") { _, _ ->
+                    @SuppressLint("BatteryLife") val intent = Intent(
+                        Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS,
+                        Uri.parse("package:" + BuildConfig.APPLICATION_ID)
+                    )
+                    context.startActivity(intent)
+                }
+                .setNeutralButton("close") { dialog, _ -> dialog.dismiss() }
+            alertDialogBuilder.show()
+        }
+    }
+
+    /**
+     * Check if battery optimization is enabled. If unknown, fallback to true.
+     *
+     * @return true if battery optimization is enabled
+     */
+    @RequiresApi(Build.VERSION_CODES.M)
+    private fun checkIfBatteryOptimizationEnabled(context: Context): Boolean {
+        val powerManager = context.getSystemService(POWER_SERVICE) as PowerManager?
+        return when {
+            powerManager != null -> !powerManager.isIgnoringBatteryOptimizations(BuildConfig.APPLICATION_ID)
+            else -> true
+        }
+    }
+
+    companion object {
+        private val TAG = PowerManagerUtil::class.simpleName
+    }
+}

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

@@ -122,6 +122,27 @@
         <item name="iconTint">@color/fontAppbar</item>
     </style>
 
+    <!-- Dialogs -->
+    <style name="Theme.ownCloud.Dialog" parent="@style/Theme.MaterialComponents.DayNight.Dialog.Alert">
+        <item name="windowNoTitle">false</item>
+        <item name="colorAccent">@color/colorAccent</item>
+        <item name="android:windowBackground">@color/bg_default</item>
+        <item name="android:textAllCaps">false</item>
+        <item name="textInputStyle">@style/Widget.App.TextInputLayout</item>
+    </style>
+
+    <style name="Widget.App.TextInputLayout" parent="Widget.MaterialComponents.TextInputLayout.OutlinedBox">
+        <item name="materialThemeOverlay">@style/ThemeOverlay.App.TextInputLayout</item>
+        <item name="hintTextColor">?attr/colorOnSurface</item>
+    </style>
+
+    <style name="ThemeOverlay.App.TextInputLayout" parent="ThemeOverlay.MaterialComponents.TextInputEditText.OutlinedBox">
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorOnSurface">@color/colorPrimary</item>
+        <item name="colorError">@color/hwSecurityRed</item>
+        <item name="editTextStyle">@style/Widget.MaterialComponents.TextInputEditText.OutlinedBox</item>
+    </style>
+
     <style name="menuTextAppearance" parent="TextAppearance.AppCompat.Widget.ActionBar.Menu">
         <item name="android:textAllCaps">false</item>
     </style>