show battery optimiz. menu item added; translated all battery stuff into Russian

android/res/menu/options_main.xml

@@ -3,14 +3,19 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     tools:context=".I2PDActivity">
+    <group android:id="@+id/group_i2pd_control" >
+        <item
+            android:id="@+id/action_stop"
+            android:orderInCategory="99"
+            android:title="@string/action_stop" />
         <item
             android:id="@+id/action_graceful_stop"
-        android:title="@string/action_graceful_stop"
             android:orderInCategory="98"
-        />
+            android:title="@string/action_graceful_stop" />
+    </group>
+    <group android:id="@+id/group_various" >
         <item
-        android:id="@+id/action_stop"
+            android:id="@+id/action_battery_otimizations"
-        android:title="@string/action_stop"
+            android:title="@string/menu_item_battery_optimizations_str" />
-        android:orderInCategory="99"
+    </group>
-        />
 </menu>

android/res/values-ru/strings.xml

@@ -17,4 +17,11 @@
     <string name="remaining">осталось</string>
     <string name="title_activity_i2_pdperms_asker_prompt">Запрос</string>
     <string name="permDenied">Права для записи на SD карту отклонены, вам необходимо предоставить их для продолжения</string>
+    <string name="menu_item_battery_optimizations_str">Оптимизации аккумулятора</string>
+    <string name="battery_optimizations_enabled">Оптимизации аккумулятора включены</string>
+    <string name="device_does_not_support_disabling_battery_optimizations">Ваша версия Андроид не поддерживает отключение оптимизаций аккумулятора</string>
+    <string name="battery_optimizations_enabled_explained">Ваша операционная система осуществляет оптимизации расхода аккумулятора, которые могут приводить к выгрузке I2PD из памяти и прекращению его работы с целью сэкономить заряд аккумулятора.\nРекомендуется отключить эти оптимизации.</string>
+    <string name="battery_optimizations_enabled_dialog"   >Ваша операционная система осуществляет оптимизации расхода аккумулятора, которые могут приводить к выгрузке I2PD из памяти и прекращению его работы с целью сэкономить заряд аккумулятора.\n\nВам сейчас будет предложено разрешить отключение этих оптимизаций.</string>
+    <string name="continue_str">Продолжить</string>
+    <string name="os_version_does_not_support_battery_optimizations_show_os_dialog_api">Ваша версия Андроид не поддерживает показ диалога об оптимизациях аккумулятора для приложений.</string>
 </resources>

android/res/values/strings.xml

@@ -18,8 +18,10 @@
     <string name="title_activity_i2_pdperms_asker_prompt">Prompt</string>
     <string name="permDenied">SD card write permission denied, you need to allow this to continue</string>
     <string name="battery_optimizations_enabled">Battery optimizations enabled</string>
-    <string name="battery_optimizations_enabled_explained">Your device is doing some heavy battery optimizations on I2PD that might lead to daemon closing with no other reason.\nIt is recommended to disable those battery optimizations.</string>
+    <string name="battery_optimizations_enabled_explained">Your Android is doing some heavy battery optimizations on I2PD that might lead to daemon closing with no other reason.\nIt is recommended to allow disabling those battery optimizations.</string>
-    <string name="battery_optimizations_enabled_dialog">Your device is doing some heavy battery optimizations on I2PD that might lead to daemon closing with no other reason.\n\nYou will now be asked to disable those.</string>
+    <string name="battery_optimizations_enabled_dialog"   >Your Android is doing some heavy battery optimizations on I2PD that might lead to daemon closing with no other reason.\n\nYou will now be asked to allow to disable those.</string>
-    <string name="next">Next</string>
+    <string name="continue_str">Continue</string>
-    <string name="device_does_not_support_disabling_battery_optimizations">Your device does not support opting out of battery optimizations</string>
+    <string name="device_does_not_support_disabling_battery_optimizations">Your Android version does not support opting out of battery optimizations</string>
+    <string name="menu_item_battery_optimizations_str">Battery Optimizations</string>
+    <string name="os_version_does_not_support_battery_optimizations_show_os_dialog_api">Your Android OS version does not support showing the dialog for battery optimizations for applications.</string>
 </resources>

android/src/org/purplei2p/i2pd/I2PDActivity.java

@@ -46,6 +46,8 @@ import androidx.core.content.ContextCompat;
 // For future package update checking
 import org.purplei2p.i2pd.BuildConfig;
 
+import static android.provider.Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS;
+
 public class I2PDActivity extends Activity {
 	private static final String TAG = "i2pdActvt";
 	private static final int MY_PERMISSION_REQUEST_WRITE_EXTERNAL_STORAGE = 1;
@@ -229,9 +231,14 @@ public class I2PDActivity extends Activity {
 	public boolean onCreateOptionsMenu(Menu menu) {
 		// Inflate the menu; this adds items to the action bar if it is present.
 		getMenuInflater().inflate(R.menu.options_main, menu);
+		menu.findItem(R.id.action_battery_otimizations).setEnabled(isBatteryOptimizationsOpenOsDialogApiAvailable());
 		return true;
 	}
 
+	private boolean isBatteryOptimizationsOpenOsDialogApiAvailable() {
+		return android.os.Build.VERSION.SDK_INT >= 23;
+	}
+
 	@Override
 	public boolean onOptionsItemSelected(@NonNull MenuItem item) {
 		// Handle action bar item clicks here. The action bar will
@@ -255,11 +262,25 @@ public class I2PDActivity extends Activity {
 					i2pdGracefulStop();
 				}
 				return true;
+			case R.id.action_battery_otimizations:
+				onActionBatteryOptimizations();
+				return true;
 		}
 
 		return super.onOptionsItemSelected(item);
 	}
 
+	private void onActionBatteryOptimizations() {
+		if (isBatteryOptimizationsOpenOsDialogApiAvailable()) {
+			try {
+				startActivity(new Intent(ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS));
+			} catch (ActivityNotFoundException e) {
+				Log.e(TAG,"BATT_OPTIM_DIALOG_ActvtNotFound", e);
+				Toast.makeText(this, R.string.os_version_does_not_support_battery_optimizations_show_os_dialog_api, Toast.LENGTH_SHORT).show();
+			}
+		}
+	}
+
 	private void i2pdStop() {
 		cancelGracefulStop();
 		new Thread(() -> {
@@ -389,6 +410,7 @@ public class I2PDActivity extends Activity {
 				copyAsset(path + "/" + entry);
 			}
 		} catch (IOException e) {
+			Log.e(TAG,"ex ignored", e);
 			copyFileAsset(path);
 		}
 	}
@@ -518,7 +540,7 @@ public class I2PDActivity extends Activity {
 			AlertDialog.Builder builder = new AlertDialog.Builder(this);
 			builder.setTitle(R.string.battery_optimizations_enabled);
 			builder.setMessage(R.string.battery_optimizations_enabled_dialog);
-			builder.setPositiveButton(R.string.next, (dialog, which) -> {
+			builder.setPositiveButton(R.string.continue_str, (dialog, which) -> {
 				try {
 					startActivity(new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS, Uri.parse(PACKAGE_URI_SCHEME + getPackageName())));
 				} catch (ActivityNotFoundException e) {