request battery optimalization whitelisting

app/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="com.google.android.permission.PROVIDE_BACKGROUND" />
+    <uses-permission-sdk-23 android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
 
     <!-- To receive data from xdrip. -->
     <uses-permission android:name="com.eveningoutpost.dexdrip.permissions.RECEIVE_BG_ESTIMATE" />

app/src/main/java/info/nightscout/androidaps/MainActivity.java

@@ -1,13 +1,17 @@
 package info.nightscout.androidaps;
 
 import android.Manifest;
+import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.graphics.Rect;
+import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.PowerManager;
+import android.provider.Settings;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
 import android.support.v4.view.ViewPager;
@@ -37,8 +41,10 @@ import info.nightscout.androidaps.tabs.TabPageAdapter;
 import info.nightscout.utils.ImportExportPrefs;
 import info.nightscout.utils.LocaleHelper;
 import info.nightscout.utils.LogDialog;
+import info.nightscout.utils.OKDialog;
 import info.nightscout.utils.PasswordProtection;
 import info.nightscout.utils.SP;
+import info.nightscout.utils.ToastUtils;
 
 public class MainActivity extends AppCompatActivity {
     private static Logger log = LoggerFactory.getLogger(MainActivity.class);
@@ -59,6 +65,7 @@ public class MainActivity extends AppCompatActivity {
             askForPermission(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE,
                     Manifest.permission.WRITE_EXTERNAL_STORAGE}, CASE_STORAGE);
         }
+        askForBatteryOptimizationPermission();
         if (Config.logFunctionCalls)
             log.debug("onCreate");
 
@@ -228,6 +235,37 @@ public class MainActivity extends AppCompatActivity {
         askForSMSPermissions();
     }
 
+    private void askForBatteryOptimizationPermission() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            final String packageName = getPackageName();
+
+            final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+            if (!pm.isIgnoringBatteryOptimizations(packageName)) {
+                log.debug("Requesting ignore battery optimization");
+
+                OKDialog.show(this, getString(R.string.pleaseallowpermission), String.format(getString(R.string.needwhitelisting), getString(R.string.app_name)), new Runnable() {
+
+                    @Override
+                    public void run() {
+                        try {
+                            final Intent intent = new Intent();
+
+                            // ignoring battery optimizations required for constant connection
+                            intent.setAction(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS);
+                            intent.setData(Uri.parse("package:" + packageName));
+                            startActivity(intent);
+
+                        } catch (ActivityNotFoundException e) {
+                            final String msg = getString(R.string.batteryoptimalizationerror);
+                            ToastUtils.showToastInUiThread(getApplicationContext(), msg);
+                            log.error(msg);
+                        }
+                    }
+                });
+            }
+        }
+    }
+
     private synchronized void askForSMSPermissions() {
         if (askForSMS) { //only when settings were changed an MainActivity resumes.
             askForSMS = false;

app/src/main/java/info/nightscout/utils/OKDialog.java

@@ -0,0 +1,44 @@
+package info.nightscout.utils;
+
+import android.app.Activity;
+import android.content.DialogInterface;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.view.ContextThemeWrapper;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import info.nightscout.androidaps.MainApp;
+import info.nightscout.androidaps.R;
+
+/**
+ * Created by mike on 31.03.2017.
+ */
+
+public class OKDialog {
+    private static Logger log = LoggerFactory.getLogger(OKDialog.class);
+
+    public static void show(final Activity activity, String title, String message, final Runnable runnable) {
+        try {
+            AlertDialog.Builder builder = new AlertDialog.Builder(new ContextThemeWrapper(activity, R.style.AppTheme));
+            builder.setTitle(title);
+            builder.setMessage(message);
+            builder.setPositiveButton(MainApp.sResources.getString(R.string.ok), new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int which) {
+                    dialog.dismiss();
+                    if (runnable != null) {
+                        try {
+                            Thread.sleep(100);
+                        } catch (InterruptedException e) {
+                        }
+                        activity.runOnUiThread(runnable);
+                    }
+                }
+            });
+
+            builder.create().show();
+        } catch (Exception e) {
+            log.debug("show_dialog exception: " + e);
+        }
+    }
+}

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

@@ -554,4 +554,7 @@
     <string name="patientage_summary">Please select patient age to setup safety limits</string>
     <string name="key_i_understand" translatable="false">I_understand</string>
     <string name="Glimp">Glimp</string>
+    <string name="batteryoptimalizationerror">Device does not appear to support battery optimization whitelisting!</string>
+    <string name="pleaseallowpermission">Please Allow Permission</string>
+    <string name="needwhitelisting">%s needs battery optimalization whitelisting for proper performance</string>
 </resources>