Question

这是我的活动类启动了警报管理器，按下我的片段上的按钮会出错！

活动 -

public class Schedule extends AppCompatActivity
{
    CardView cardView = null;
    private Toolbar toolbar;
    private TabLayout tabLayout;
    private ViewPager viewPager;
    ViewPagerAdapter viewPagerAdapter;
    Context context;


    private int[] tabIcons = {
            R.drawable.ic_timeline_icon,
            R.drawable.ic_schedule_icon,
            R.drawable.ic_explore_icon
    };

    public Schedule() {

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_schedule);

        //initilize this variable
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        cardView = (CardView) findViewById(R.id.cv);


        viewPager = (ViewPager) findViewById(R.id.viewpager);
        tabLayout = (TabLayout) findViewById(R.id.tabLayout);
        viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
        viewPagerAdapter.addFragment(new Profile(), "PROFILE");
        viewPagerAdapter.addFragment(new Scope(), "SCOPE");
        viewPagerAdapter.addFragment(new Explore(), "EXPLORE");
        viewPager.setAdapter(viewPagerAdapter);
        tabLayout.setupWithViewPager(viewPager);
        setupTabIcons();


        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        this.context = this;
    }

    public void alarmHouse() {
        Calendar cal = Calendar.getInstance();
        Intent intent = new Intent(getApplicationContext(), Notification_receiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarm_manager = (AlarmManager) getSystemService(ALARM_SERVICE);
        alarm_manager.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);
    }

    private void setupTabIcons() {
        tabLayout.getTabAt(0).setIcon(tabIcons[0]);
        tabLayout.getTabAt(1).setIcon(tabIcons[1]);
        tabLayout.getTabAt(2).setIcon(tabIcons[2]);
    }`

//这是Alarm的Fragment类

public class Scope extends Fragment {

    protected static Button txtDate, txtDateEnds, txtTimeIn, txtTimeOut;
    Context context;


    public Scope() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


    }
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_scope, container, false);

    txtDate = (Button) view.findViewById(R.id.btn_termBegins);
    txtDateEnds = (Button) view.findViewById(R.id.btn_termEnds);
    txtTimeIn = (Button) view.findViewById(R.id.time_in);
    txtTimeOut = (Button) view.findViewById(R.id.time_out);
    assert txtDate != null;
    assert txtDateEnds != null;
    assert txtTimeIn != null;
    assert txtTimeOut != null;
    termBegins();
    termEnds();
    periodTimeIn();
    periodTimeOut();


    return view;

}

public void termBegins() {
    txtDate.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            SectionEndsDate mDatePicker = new SectionEndsDate();
            mDatePicker.show(getFragmentManager(), "Select date");
        }
    });
}

public void termEnds() {
    txtDateEnds.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            SectionBeginsDate mDatePicker = new SectionBeginsDate();
            mDatePicker.show(getFragmentManager(), "Select date");
        }
    });
}

public static class SectionEndsDate extends DialogFragment implements DatePickerDialog.OnDateSetListener
{
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar cal = Calendar.getInstance();
        int year_x = cal.get(Calendar.YEAR);
        int month_x = cal.get(Calendar.MONTH);
        int day_x = cal.get(Calendar.DAY_OF_MONTH);

        return new DatePickerDialog(getActivity(), this, year_x, month_x, day_x);
    }

    public void onDateSet(DatePicker view, int year_x, int month_x, int day_x) {
        txtDate.setText("Section Begins: " + String.valueOf(day_x) + " - " + String.valueOf(month_x + 1) + " - " + String.valueOf(year_x));
    }
}

public static class SectionBeginsDate extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar cal = Calendar.getInstance();
        int year_x = cal.get(Calendar.YEAR);
        int month_x = cal.get(Calendar.MONTH);
        int day_x = cal.get(Calendar.DAY_OF_MONTH);
        return new DatePickerDialog(getActivity(), this, year_x, month_x, day_x);
    }

    public void onDateSet(DatePicker view, int year_x, int month_x, int day_x) {
        txtDateEnds.setText("Section Ends: " + String.valueOf(day_x) + " / " + String.valueOf(month_x + 1) + " / " + String.valueOf(year_x));
    }
}

public void periodTimeIn() {
    txtTimeIn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Schedule schedule = new Schedule();
            schedule.alarmHouse();
            TimeInPicker mTimePicker = new TimeInPicker();
            mTimePicker.show(getFragmentManager(), "Select time");

        }
    });
}

public void periodTimeOut() {
    txtTimeOut.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            TimeOutPicker mTimePicker = new TimeOutPicker();
            mTimePicker.show(getFragmentManager(), "Select time");
        }
    });
}


public static class TimeInPicker extends DialogFragment implements TimePickerDialog.OnTimeSetListener {
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR_OF_DAY);
        int minute = c.get(Calendar.MINUTE);
        return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity()));
    }

    @Override
    public void onTimeSet(android.widget.TimePicker view, int hourOfDay, int minute) {
        txtTimeIn.setText("Time In: " +
                String.valueOf((hourOfDay == 0 || hourOfDay == 12) ? 12 : hourOfDay % 12) + " : "
                + String.valueOf((minute < 10) ? "0" + minute : minute) + " " + (hourOfDay < 12 ? "AM" : "PM"));


    }
}


public static class TimeOutPicker extends DialogFragment implements TimePickerDialog.OnTimeSetListener
{
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR_OF_DAY);
        int minute = c.get(Calendar.MINUTE);
        return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity()));
    }

    @Override
    public void onTimeSet(android.widget.TimePicker view, int hourOfDay, int minute) {
        txtTimeOut.setText("Time Out: " +
                String.valueOf((hourOfDay == 0 || hourOfDay == 12) ? 12 : hourOfDay % 12) + " : "
                + String.valueOf((minute < 10) ? "0" + minute : minute) + " " + (hourOfDay < 12 ? "AM" : "PM"));

    }
}

Answer 1

您正在创建Activity类的新实例，并尝试像普通Java类一样调用其方法。

Schedule schedule = new Schedule();
schedule.alarmHouse();

在这种情况下，您将没有在alarmHouse()中设置闹钟所需的应用程序上下文。

您需要使用getActivity()从您的片段中调用容器活动的任何公共方法。所以它会像 -

`getActivity().alarmHouse();`

我很难让片段触发警报。这是我的活动和片段

1 个答案: