- Simplify alarm setting, cancellation, and resetting code

- Lintian cleanups

HypoAlarm/src/main/AndroidManifest.xml

@@ -16,8 +16,8 @@
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <!-- permission required to vibrate -->
     <uses-permission android:name="android.permission.VIBRATE" />
-    <!-- permission required to wake the device -->
+    <!-- permission required for AlarmService to keep the CPU awake -->
-    <!-- uses-permission android:name="android.permission.WAKE_LOCK"/ -->
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
 
     <application
         android:allowBackup="true"

HypoAlarm/src/main/java/za/org/treehouse/hypoalarm/AlarmService.java

@@ -9,6 +9,7 @@ import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
+import android.os.PowerManager;
 import android.preference.PreferenceManager;
 import android.telephony.TelephonyManager;
 import android.util.Log;
@@ -18,6 +19,7 @@ import java.util.Calendar;
 public class AlarmService extends Service {
     private static final int SNOOZE_TIME = 1000*60*5; // Snooze for 5 minutes if need be
     private static final int ALERT_LIFE  = 1000*60*1; // 2 minutes
+    private static PowerManager.WakeLock wl;
     private static AlarmManager alarmManager;
     private static Intent alarmServiceIntent, alertActivityIntent, notifyIntent;
     private static Boolean alarmStarted = false;
@@ -31,6 +33,11 @@ public class AlarmService extends Service {
 
     @Override
     public void onCreate() {
+        // Ensure that CPU runs while the service is running, so we don't miss an alert or snooze
+        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+        wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "AlarmService");
+        //wl.acquire();
+
         alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
     }
     @Override
@@ -40,6 +47,9 @@ public class AlarmService extends Service {
             stopAlert(getApplicationContext());
             alarmStarted = false;
         }
+        if (wl.isHeld()) {
+            wl.release();
+        }
     }
 
     @Override
@@ -100,6 +110,7 @@ public class AlarmService extends Service {
             if (cal.before(Calendar.getInstance())) {
                 cal.add(Calendar.DAY_OF_MONTH, 1);
             }
+
             PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(this, MainActivity.ALARM_REQUEST, intent, 0);
             alarmManager.cancel(alarmPendingIntent);
             if (Build.VERSION.SDK_INT >= 19) {

HypoAlarm/src/main/java/za/org/treehouse/hypoalarm/BootReceiver.java

@@ -1,12 +1,9 @@
 package za.org.treehouse.hypoalarm;
 
-import android.app.AlarmManager;
-import android.app.PendingIntent;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.os.Build;
 import android.preference.PreferenceManager;
 import android.util.Log;
 
@@ -17,21 +14,10 @@ public class BootReceiver extends BroadcastReceiver {
     public void onReceive(Context context, Intent intent) {
         SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(context);
         if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
-            // Reset for tomorrow; as of API 19, setRepeating() is inexact, so we use setExact()
             String alarmTimeStr = sharedPref.getString(context.getString(R.string.AlarmTimePref), null);
-            Boolean alarmActive = sharedPref.getBoolean(context.getString(R.string.AlarmActivePref), true);
+            Calendar cal = MainActivity.TimeStringToCalendar(alarmTimeStr);
-            if (alarmTimeStr != null && alarmActive) {
+            Log.d("BootReceiver", "Booting: Setting alarm for " + MainActivity.debugDate(cal));
-                // If it's later than alarmTimeStr, Calendar automatically advances the day.
+            MainActivity.resetAlarm(context, cal);
-                Calendar cal = MainActivity.TimeStringToCalendar(alarmTimeStr);
-                AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
-                PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
-                if (Build.VERSION.SDK_INT >= 19) {
-                    alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmPendingIntent);
-                } else {
-                    alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmPendingIntent);
-                }
-                Log.d("BootReceiver", "Setting alarm for "+MainActivity.debugDate(cal));
-            }
         }
     }
 }

HypoAlarm/src/main/java/za/org/treehouse/hypoalarm/MainActivity.java

@@ -60,13 +60,11 @@ import java.util.regex.Pattern;
 public class MainActivity extends ActionBarActivity {
     public static final int ALARM_REQUEST = 1;
     public static final int GRACE_REQUEST = 2;
-    public static final int PRENOTIFY_REQUEST = 3;
+    public static final int PRE_NOTIFY_REQUEST = 3;
     public static final int CANCEL_GRACE_REQUEST = 4;
     public static final int CANCEL_ALARM_REQUEST = 5;
     public static final int PHONE_NUMBER_REQUEST = 6;
     public static final int RINGTONE_REQUEST = 7;
-    private static Button alarmTimeButton;
-    private static EditText messageButton;
 
     public static final Boolean HYPOALARM_DEBUG = false;
 
@@ -91,63 +89,18 @@ public class MainActivity extends ActionBarActivity {
         @Override
         public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                  Bundle savedInstanceState) {
-            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
+            return inflater.inflate(R.layout.fragment_main, container, false);
-            return rootView;
         }
 
         public void onStart() {
-            super.onStart();
-
             final SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(getActivity());
 
-            // Allow alarm to activate
+            super.onStart();
-            Boolean alarmActive = sharedPref.getBoolean(getString(R.string.AlarmActivePref), true);
-            CompoundButton alarmActiveSwitch = (CompoundButton) getActivity().findViewById(R.id.alarm_active_switch);
-            alarmActiveSwitch.setChecked(alarmActive);
-            alarmActiveSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
-                @Override
-                public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
-                    AlarmManager alarmManager;
-                    PendingIntent alarmPendingIntent, gracePendingIntent, preNotifyPendingIntent;
-                    SharedPreferences.Editor editor = sharedPref.edit();
-
-                    editor.putBoolean(getString(R.string.AlarmActivePref), b);
-                    editor.commit();
-
-                    if (!b) {
-                        // Cancel any current alarm
-                        alarmManager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
-                        Intent alarmIntent = new Intent(getActivity(), AlarmReceiver.class);
-                        alarmPendingIntent = PendingIntent.getBroadcast(getActivity(), ALARM_REQUEST, alarmIntent, 0);
-                        alarmManager.cancel(alarmPendingIntent);
-                        // Cancel any pre-alarm notification
-                        Intent preNotifyIntent = new Intent(getActivity(), AlarmReceiver.class);
-                        preNotifyPendingIntent = PendingIntent.getBroadcast(getActivity(), PRENOTIFY_REQUEST, alarmIntent, 0);
-                        alarmManager.cancel(preNotifyPendingIntent);
-                        // Cancel any grace period
-                        Intent graceIntent = new Intent(getActivity(), GraceReceiver.class);
-                        gracePendingIntent = PendingIntent.getBroadcast(getActivity(), GRACE_REQUEST, graceIntent, 0);
-                        alarmManager.cancel(gracePendingIntent);
-                        // Stop any notifications
-                        getActivity().stopService(new Intent(getActivity(), AlarmNotify.class));
-                        getActivity().stopService(new Intent(getActivity(), PreAlarmNotify.class));
-
-                        Log.d("MainActivity", "Alarms cancelled");
-                        Toast.makeText(getActivity().getApplicationContext(), getString(R.string.alarmCancelled), Toast.LENGTH_SHORT).show();
-                    } else {
-                        // Activate the alarm
-                        DialogFragment alarmFragment = new TimePickerFragment();
-                        alarmFragment.show(getActivity().getSupportFragmentManager(), "alarmTimePicker");
-                        alarmFragment.dismiss();
-                    }
-                }
-            });
-
 
             // Set alarm time
-            String defaultTimeStr = "09:00";
+            final String defaultTimeStr = "09:00";
             String alarmTimeStr = verifyTimeString(sharedPref.getString(getString(R.string.AlarmTimePref), defaultTimeStr));
-            alarmTimeButton = (Button) getActivity().findViewById(R.id.alarm_time);
+            final Button alarmTimeButton = (Button) getActivity().findViewById(R.id.alarm_time);
 
             // When debugging, set the alarm for one minute's time
             if (HYPOALARM_DEBUG) {
@@ -165,15 +118,37 @@ public class MainActivity extends ActionBarActivity {
                 }
             });
 
-            // Activate the time when starting the app.
+            // Allow alarm to activate
-            DialogFragment alarmFragment = new TimePickerFragment();
+            Boolean alarmActive = sharedPref.getBoolean(getString(R.string.AlarmActivePref), true);
-            alarmFragment.show(getActivity().getSupportFragmentManager(), "alarmTimePicker");
+            final CompoundButton alarmActiveSwitch = (CompoundButton) getActivity().findViewById(R.id.alarm_active_switch);
-            alarmFragment.dismiss();
+            alarmActiveSwitch.setChecked(alarmActive);
+            alarmActiveSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+                @Override
+                public void onCheckedChanged(CompoundButton compoundButton, boolean active) {
+                    SharedPreferences.Editor editor = sharedPref.edit();
+                    editor.putBoolean(getString(R.string.AlarmActivePref), active);
+                    editor.commit();
+
+                    if (!active) {
+                        cancelAllAlarms(getActivity());
+                        Toast.makeText(getActivity(), getString(R.string.alarmCancelled), Toast.LENGTH_SHORT).show();
+                    } else {
+                        String alarmTimeStr = verifyTimeString(sharedPref.getString(getString(R.string.AlarmTimePref), defaultTimeStr));
+                        Calendar cal = TimeStringToCalendar(alarmTimeStr);
+                        resetAlarm(getActivity(), cal);
+                    }
+                }
+            });
+
+            // Activate the time (after setting alarmActive) when starting the app.
+            Calendar cal = TimeStringToCalendar(alarmTimeStr);
+            resetAlarm(getActivity(), cal);
 
             // Set grace period
-            int defaultGrace = 60;
+            final int defaultGrace = 60;
             int gracePeriod = sharedPref.getInt(getString(R.string.GracePeriodPref), defaultGrace);
-            Spinner gracePeriodSpinner = (Spinner) getActivity().findViewById(R.id.grace_period);
+            final Spinner gracePeriodSpinner = (Spinner) getActivity().findViewById(R.id.grace_period);
+
             gracePeriodSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                 final SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(getActivity());
 
@@ -191,7 +166,7 @@ public class MainActivity extends ActionBarActivity {
                 }
             });
             // Set value of drop-down list to value of gracePeriodStr
-            ArrayAdapter gracePeriodSpinnerAdapter = (ArrayAdapter) gracePeriodSpinner.getAdapter();
+            ArrayAdapter<String> gracePeriodSpinnerAdapter = (ArrayAdapter<String>) gracePeriodSpinner.getAdapter();
             int spinnerPosition = gracePeriodSpinnerAdapter.getPosition(MinutesToGracePeriodStr(gracePeriod));
             gracePeriodSpinner.setSelection(spinnerPosition);
 
@@ -218,7 +193,7 @@ public class MainActivity extends ActionBarActivity {
 
             // Set phone number
             String phoneNumberStr = sharedPref.getString(getString(R.string.PhoneNumberPref), null);
-            EditText phoneNumberButton = (EditText) getActivity().findViewById(R.id.phone_number);
+            final EditText phoneNumberButton = (EditText) getActivity().findViewById(R.id.phone_number);
             phoneNumberButton.setText(phoneNumberStr);
             phoneNumberButton.setOnClickListener(new View.OnClickListener() {
                 @Override
@@ -230,7 +205,7 @@ public class MainActivity extends ActionBarActivity {
 
             // Set message
             String messageStr = sharedPref.getString(getString(R.string.MessagePref), getString(R.string.defaultMessage));
-            messageButton = (EditText) getActivity().findViewById(R.id.message);
+            final EditText messageButton = (EditText) getActivity().findViewById(R.id.message);
             messageButton.setText(messageStr);
             messageButton.setOnClickListener(new View.OnClickListener() {
                 @Override
@@ -285,7 +260,7 @@ public class MainActivity extends ActionBarActivity {
 
             // If we're answering a ringtone dialogue, update the correct button
             if (requestCode == RINGTONE_REQUEST && resultCode == RESULT_OK) {
-                SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
+                SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(getActivity());
                 SharedPreferences.Editor editor = sharedPref.edit();
                 Button ringtoneButton = (Button) getActivity().findViewById(R.id.ringtone);
 
@@ -302,16 +277,92 @@ public class MainActivity extends ActionBarActivity {
         }
     }
 
+    public static void cancelAllAlarms(Context context) {
+        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+
+        // Cancel any current alarm
+        Intent alarmIntent = new Intent(context, AlarmReceiver.class);
+        PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(context, ALARM_REQUEST, alarmIntent, 0);
+        alarmManager.cancel(alarmPendingIntent);
+
+        // Cancel any pre-alarm notification
+        Intent preNotifyIntent = new Intent(context, PreAlarmReceiver.class);
+        PendingIntent preNotifyPendingIntent = PendingIntent.getBroadcast(context, PRE_NOTIFY_REQUEST, preNotifyIntent, 0);
+        alarmManager.cancel(preNotifyPendingIntent);
+
+        // Cancel any grace period
+        Intent graceIntent = new Intent(context, GraceReceiver.class);
+        PendingIntent gracePendingIntent = PendingIntent.getBroadcast(context, GRACE_REQUEST, graceIntent, 0);
+        alarmManager.cancel(gracePendingIntent);
+
+        // Stop any notifications
+        context.stopService(new Intent(context, AlarmNotify.class));
+        context.stopService(new Intent(context, PreAlarmNotify.class));
+
+        Log.d("MainActivity", "Alarms cancelled");
+    }
+
+    public static void resetAlarm(Context context, Calendar cal) {
+        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+        PendingIntent alarmPendingIntent, preNotifyPendingIntent;
+        SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(context);
+        Boolean alarmActive = sharedPref.getBoolean(context.getString(R.string.AlarmActivePref), true);
+
+        cancelAllAlarms(context);
+
+        // Advance cal to tomorrow if setting a time earlier than now
+        if (cal.before(Calendar.getInstance())) {
+            cal.add(Calendar.DAY_OF_MONTH, 1);
+        }
+
+        if (alarmActive) {
+            // Initialise alarm, which displays a dialog and system alert, and
+            // calls AlarmManager with grace_period as the delay
+            // which in turn, sends SMS if dialog is not exited.
+            // Advance to tomorrow if setting a time earlier than now
+            Intent alarmIntent = new Intent(context, AlarmReceiver.class);
+            alarmPendingIntent = PendingIntent.getBroadcast(context, ALARM_REQUEST, alarmIntent, 0);
+            // Set or reset alarm
+            if (Build.VERSION.SDK_INT >= 19) {
+                alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmPendingIntent);
+            } else {
+                alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmPendingIntent);
+            }
+            Log.d("MainActivity", "Setting alarm for " + MainActivity.debugDate(cal));
+
+            // Set an alarm for the pre-alarm notification, half an hour before the alarm
+            Calendar preNotifyCal = (Calendar) cal.clone();
+            preNotifyCal.add(Calendar.MINUTE, -30);
+            Intent preNotifyIntent = new Intent(context, PreAlarmReceiver.class);
+            preNotifyPendingIntent = PendingIntent.getBroadcast(context, PRE_NOTIFY_REQUEST, preNotifyIntent, 0);
+            // Set or reset alarm
+            if (Build.VERSION.SDK_INT >= 19) {
+                alarmManager.setExact(AlarmManager.RTC_WAKEUP, preNotifyCal.getTimeInMillis(), preNotifyPendingIntent);
+            } else {
+                alarmManager.set(AlarmManager.RTC_WAKEUP, preNotifyCal.getTimeInMillis(), preNotifyPendingIntent);
+            }
+            Log.d("MainActivity", "Setting pre-alarm for " + MainActivity.debugDate(preNotifyCal));
+
+            // Set boot receiver, so alarm restarts on boot
+            ComponentName bootReceiver = new ComponentName(context, BootReceiver.class);
+            PackageManager pm = context.getPackageManager();
+            pm.setComponentEnabledSetting(bootReceiver,
+                    PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+                    PackageManager.DONT_KILL_APP);
+            Log.d("MainActivity", "Setting BootReceiver");
+
+        }
+    }
+
     // Alarm time picker
     public static class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener {
         SharedPreferences sharedPref;
-        private AlarmManager alarmManager;
-        private PendingIntent alarmPendingIntent, preNotifyPendingIntent;
 
         @Override
         public Dialog onCreateDialog(Bundle savedInstanceState) {
             sharedPref = PreferenceManager.getDefaultSharedPreferences(getActivity());
             // Use the current set time as the default value for the picker
+            Button alarmTimeButton = (Button) getActivity().findViewById(R.id.alarm_time);
             String alarmTimeStr = alarmTimeButton.getText().toString();
             // For selecting a time, the date doesn't matter, just the hour and minute
             Calendar cal = TimeStringToCalendar(alarmTimeStr);
@@ -324,17 +375,11 @@ public class MainActivity extends ActionBarActivity {
         }
 
         public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
-            Boolean alarmActive = sharedPref.getBoolean(getString(R.string.AlarmActivePref), true);
-
             // Set time preference
             Calendar cal = Calendar.getInstance();
             cal.set(Calendar.HOUR_OF_DAY, hourOfDay);
             cal.set(Calendar.MINUTE, minute);
             cal.set(Calendar.SECOND, 0);
-            // Advance to tomorrow if setting a time earlier than now
-            if (cal.before(Calendar.getInstance())) {
-                cal.add(Calendar.DAY_OF_MONTH, 1);
-            }
             String alarmStr = CalendarToTimeString(cal);
 
             SharedPreferences.Editor editor = sharedPref.edit();
@@ -344,73 +389,37 @@ public class MainActivity extends ActionBarActivity {
             Button alarm_time = (Button) getActivity().findViewById(R.id.alarm_time);
             alarm_time.setText(alarmStr);
 
-            if (alarmActive) {
+            // Set actual alarm
-                // Initialise alarm, which displays a dialog and system alert, and
+            resetAlarm(getActivity(), cal);
-                // calls AlarmManager with grace_period as the delay
-                // which in turn, sends SMS if dialog is not exited.
-                alarmManager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
-                Intent alarmIntent = new Intent(getActivity(), AlarmReceiver.class);
-                alarmPendingIntent = PendingIntent.getBroadcast(getActivity(), ALARM_REQUEST, alarmIntent, 0);
-                // Cancel any existing alarms
-                alarmManager.cancel(alarmPendingIntent);
-                // Set or reset alarm
-                if (Build.VERSION.SDK_INT >= 19) {
-                    alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmPendingIntent);
-                } else {
-                    alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmPendingIntent);
-                }
-                Log.d("MainActivity", "Setting alarm for " + MainActivity.debugDate(cal));
 
-                // Set an alarm for the pre-alarm notification, half an hour before the alarm
+            // Display toast
-                Calendar preNotifyCal = cal;
+            CharSequence text = getString(R.string.alarmSetToast) + " " + CalendarToTimeString(cal);
-                preNotifyCal.add(Calendar.MINUTE, -30);
+            Toast.makeText(getActivity(), text, Toast.LENGTH_SHORT).show();
-                Intent preNotifyIntent = new Intent(getActivity(), PreAlarmReceiver.class);
-                preNotifyPendingIntent = PendingIntent.getBroadcast(getActivity(), PRENOTIFY_REQUEST, preNotifyIntent, 0);
-                // Cancel any existing alarms
-                alarmManager.cancel(preNotifyPendingIntent);
-                // Set or reset alarm
-                if (Build.VERSION.SDK_INT >= 19) {
-                    alarmManager.setExact(AlarmManager.RTC_WAKEUP, preNotifyCal.getTimeInMillis(), preNotifyPendingIntent);
-                } else {
-                    alarmManager.set(AlarmManager.RTC_WAKEUP, preNotifyCal.getTimeInMillis(), preNotifyPendingIntent);
-                }
-                Log.d("MainActivity", "Setting pre-alarm for " + MainActivity.debugDate(preNotifyCal));
-
-                // Set boot receiver, so alarm restarts on boot
-                ComponentName receiver = new ComponentName(getActivity(), BootReceiver.class);
-                PackageManager pm = getActivity().getPackageManager();
-                pm.setComponentEnabledSetting(receiver,
-                        PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
-                        PackageManager.DONT_KILL_APP);
-
-                // Display toast
-                CharSequence text = getString(R.string.alarmSetToast) + " " + alarmStr;
-                Toast.makeText(getActivity().getApplicationContext(), text, Toast.LENGTH_SHORT).show();
-            }
         }
     }
 
     public static class PhonePickerFragment extends DialogFragment {
-        EditText phoneButton;
+        SharedPreferences sharedPref;
         EditText phoneInput;
-        Button contactsButton;
 
         @Override
         public Dialog onCreateDialog(Bundle savedInstanceState) {
-            final SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(getActivity());
+            sharedPref = PreferenceManager.getDefaultSharedPreferences(getActivity());
 
             AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
             alert.setMessage(R.string.setPhoneNumber);
 
             LayoutInflater inflater = getActivity().getLayoutInflater();
+            // Pass null instead of the parent ViewGroup, as the parent View is a
+            // ScrollView, which can only have one direct child
             View dialogView = inflater.inflate(R.layout.phone_dialog, null);
             alert.setView(dialogView);
 
-            phoneButton = (EditText) getActivity().findViewById(R.id.phone_number);
+            final EditText phoneButton = (EditText) getActivity().findViewById(R.id.phone_number);
             phoneInput = (EditText) dialogView.findViewById(R.id.dialog_phone_number);
             phoneInput.setText(phoneButton.getText().toString());
             phoneInput.setSelection(phoneInput.getText().length());
-            contactsButton = (Button) dialogView.findViewById(R.id.dialog_contacts_button);
+            final Button contactsButton = (Button) dialogView.findViewById(R.id.dialog_contacts_button);
 
             alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                 public void onClick(DialogInterface dialog, int whichButton) {

HypoAlarm/src/main/res/layout/fragment_main.xml

@@ -62,7 +62,7 @@
                 android:layout_height="wrap_content"
                 android:id="@+id/alarm_time"
                 android:gravity="center_vertical"
-                style="?android:attr/borderlessButtonStyle"
+                style="@style/borderless_button"
                 android:layout_column="1" />
         </TableRow>
 

HypoAlarm/src/main/res/values-small/styles.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="borderless_button"></style>
+</resources>

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

@@ -3,4 +3,6 @@
     <style name="AppTheme" parent="Theme.AppCompat">
         <!-- Customize your theme here. -->
     </style>
+
+    <style name="borderless_button">?android:attr/borderlessButtonStyle</style>
 </resources>