request ignore battery optimizations [permission]

README.md

@@ -113,6 +113,7 @@ The app benefits from the following permissions...
 |POWER_OFF_ALARM|To wake the device from the power off state.|v0.14.0|
 |READ_EXTERNAL_STORAGE|To play alarm sounds located on the SD card.|v0.11.5, v0.13.8 (api≤18)|
 |SET_ALARM|To interact with the system AlarmClock app.|v0.1.0|
+|REQUEST_IGNORE_BATTERY_OPTIMIZATIONS|To help ensure reliable delivery of alarms.|v0.14.11|
 |WRITE_EXTERNAL_STORAGE|To export data (places, themes, etc.) to file.|v0.2.2 (api≤18)|
 
 Version `v0.13.8` removed READ_EXTERNAL_STORAGE for api≥19 (replaced with persistent URI permissions). 

app/src/main/AndroidManifest.xml

@@ -16,7 +16,9 @@
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />  <!-- needed by AlarmClock to restore alarms after shutdown/reboot -->
 
     <uses-permission android:name="org.codeaurora.permission.POWER_OFF_ALARM" />  <!-- needed for hardware dependent 'power off' alarms -->
-
+
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />  <!-- needed for reliable delivery of alarms and notifications -->
+
     <permission
         android:name="suntimes.permission.READ_CALCULATOR"
         android:protectionLevel="normal" />                       <!-- protects suntimeswidget.calculator.provider -->

app/src/main/java/com/forrestguice/suntimeswidget/SuntimesSettingsActivity.java

@@ -24,6 +24,7 @@
 import android.app.AlertDialog;
 import android.app.KeyguardManager;
 import android.app.ProgressDialog;
+import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -1832,14 +1833,50 @@ private static Preference.OnPreferenceClickListener onBatteryOptimizationClicked
        return new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference preference) {
-               if (Build.VERSION.SDK_INT >= 23) {
-                   context.startActivity(new Intent(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS));
-               }
+               openBatteryOptimizationSettings(context);
                return false;
            }
        };
     }
 
+    public static void openBatteryOptimizationSettings(final Context context)
+    {
+        if (Build.VERSION.SDK_INT >= 23) {
+            try {
+                context.startActivity(getRequestIgnoreBatteryOptimizationSettingsIntent(context));
+            } catch (ActivityNotFoundException e) {
+                Log.e(LOG_TAG, "Failed to launch battery optimization settings Intent: " + e);
+            }
+        }
+    }
+    public static void requestIgnoreBatteryOptimization(final Context context)
+    {
+        if (Build.VERSION.SDK_INT >= 23) {
+            try {
+                context.startActivity( getRequestIgnoreBatteryOptimizationIntent(context));
+            } catch (ActivityNotFoundException e) {
+                Log.e(LOG_TAG, "Failed to launch battery optimization request Intent: " + e);
+            }
+        }
+    }
+
+    /**
+     * Recommended; this Intent shows the optimization list (and the user must find and select the app)
+     */
+    @TargetApi(23)
+    public static Intent getRequestIgnoreBatteryOptimizationSettingsIntent(Context context) {
+        return new Intent(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS);
+    }
+
+    /**
+     * This Intent goes directly to the app's optimization settings.
+     * Requires permission `android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS`
+     */
+    @TargetApi(23)
+    public static Intent getRequestIgnoreBatteryOptimizationIntent(Context context) {
+        return new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS, Uri.parse("package:" + context.getPackageName()));
+    }
+
     protected static boolean isDeviceSecure(Context context)
     {
         KeyguardManager keyguard = (KeyguardManager)context.getSystemService(Context.KEYGUARD_SERVICE);

app/src/main/java/com/forrestguice/suntimeswidget/alarmclock/ui/AlarmClockActivity.java

@@ -902,9 +902,7 @@ public void onClick(View view) {
             {
                 @Override
                 public void onClick(View view) {
-                    if (Build.VERSION.SDK_INT >= 23) {
-                        startActivity(new Intent(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS));
-                    }
+                    SuntimesSettingsActivity.openBatteryOptimizationSettings(AlarmClockActivity.this);
                 }
             });
             batteryOptimizationWarning.show();