this is the code



 buttonalarm = (Button) findViewById(R.id.buttonalarm);
    buttonalarm.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int hour = Integer.parseInt(houredit.getText().toString());
            int minute = Integer.parseInt(minuteedit.getText().toString());
            Intent intent = new Intent(AlarmClock.ACTION_SET_ALARM);
            intent.putExtra(AlarmClock.EXTRA_HOUR, hour);
            intent.putExtra(AlarmClock.EXTRA_MINUTES, minute);

            if (hour <= 24 && minute <= 60) {
                startActivity(intent);

            }
        }
    });

java.lang.NumberFormatException: Invalid int: ""
        at java.lang.Integer.invalidInt(Integer.java:138)
        at java.lang.Integer.parseInt(Integer.java:358)
        at java.lang.Integer.parseInt(Integer.java:334)
        at com.koko.myapp.alarma$2.onClick(alarma.java:72)
        at android.view.View.performClick(View.java:4780)
        at android.view.View$PerformClick.run(View.java:19866)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Hello you can first add manifest file this permission,

"com.android.alarm.permission.SET_ALARM"

then

public void onToggleClicked(View view) {
        if (((ToggleButton) view).isChecked()) {
            Log.d("MyActivity", "Alarm On");
            Calendar calendar = Calendar.getInstance();
            calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getCurrentHour());
            calendar.set(Calendar.MINUTE, alarmTimePicker.getCurrentMinute());
            Intent myIntent = new Intent(AlarmActivity.this, AlarmReceiver.class);
            pendingIntent = PendingIntent.getBroadcast(AlarmActivity.this, 0, myIntent, 0);
            alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
        } else {
            alarmManager.cancel(pendingIntent);
            setAlarmText("");
            Log.d("MyActivity", "Alarm Off");
        }
    }