java - 如何更改 MaterialCalendarView 中日历日期的背景颜色

Question

我正在尝试使用收到的 JSON 响应更改日期的背景颜色。但是我遇到了一些困难。

这是我的代码:

<com.prolificinteractive.materialcalendarview.MaterialCalendarView
            android:id="@+id/calendarView"
            android:layout_width="match_parent"
            android:layout_height="300dp"
            android:layout_marginBottom="16dp"
            android:layout_marginTop="16dp" />

MainActivty.java

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {     

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

        calbg();
        materialCalendarView.setDateTextAppearance(View.ACCESSIBILITY_LIVE_REGION_ASSERTIVE);
        Calendar calendar = Calendar.getInstance();
        materialCalendarView.setSelectedDate(calendar.getTime());
        materialCalendarView.setOnDateChangedListener(new OnDateSelectedListener() {  
        get1 = sharedpreferences.getString(CLIENT, "");       
        materialCalendarView.setDateTextAppearance(getTitleColor());            
        materialCalendarView.setHeaderTextAppearance(R.style.AppTheme_Dark1);   
    }

    private void calbg() {
        // Volley's json array request object
        StringRequest stringRequest = new StringRequest(Request.Method.POST, CALENDAR_DATA,
                new Response.Listener < String > () {  
                    @Override
                    public void onResponse(String response) {
                        JSONObject object = null;
                        try {
                            object = new JSONObject(response);
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

                        JSONArray jsonarray = null;
                        try {
                            jsonarray = object.getJSONArray("Table");
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

//                        SimpleDateFormatter formatter = new SimpleDateFormatter(); //TODO: update this line with the correct formatter
                        List<Event> events = new ArrayList<>();
                        for (int i = 0; i < jsonarray.length(); i++) {
                            try {
                                JSONObject obj = jsonarray.getJSONObject(i);

                                String str = obj.getString("eventdate").replaceAll("\\D+","");
                                String upToNCharacters = str.substring(0, Math.min(str.length(), 13));
                                DateFormat timeZoneFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
                                timeZoneFormat.setTimeZone(TimeZone.getTimeZone("GMT-8"));

                                Date time = new java.util.Date(Long.parseLong(upToNCharacters));
//                                System.out.println(time);
//                                movie.setDate(String.valueOf(timeZoneFormat.format(time)));
//                                String str2 = String.valueOf(timeZoneFormat.format(time));
                                String str1 = obj.optString("eventcolor");
//                                Date date = formatter.parse(str2);
                                int color = Integer.parseInt(str1); //TODO: update this line with the correct code to parse your color
                                Event event = new Event(time, color);
                                events.add(event);
                            }
                            catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }

                        for (Event event : events) {

                        //Here is the problem in parameter
                            EventDecorator eventDecorator = new EventDecorator(event.getDate(), event.getColor()); 
                            materialCalendarView.addDecorator(eventDecorator);
                        }
                    }

                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                //                VolleyLog.d(TAG, "Error: " + error.getMessage());
                //                hidePDialog();

            }
        }) {
            @Override
            protected Map < String, String > getParams() {
                Map < String, String > params = new HashMap < String, String > ();
                params.put(CLIENT, get1);
                return params;
            }
        };
        // Adding request to request queue
        MyApplication.getInstance().addToRequestQueue(stringRequest);
    }}

JSON 响应

{  
   "Table":[  
      {  
         "userid":4,
         "eventname":"adi",
         "eventdate":"\/Date(1484121600000-0800)\/",
         "eventcolor":"2413AD",
         "autoid":2005
      },


      {  
         "userid":4,
         "eventname":"Mandeep",
         "eventdate":"\/Date(1480924800000-0800)\/",
         "eventcolor":"3A87AD",
         "autoid":2002
      },
      {  
         "userid":4,
         "eventname":"nefv",
         "eventdate":"\/Date(1477465200000-0700)\/",
         "eventcolor":"39AD37",
         "autoid":2
      },

   ]
}  

Answer 1

第一步是创建一个 DayViewDecorator，它将一个 Date 和一个颜色作为参数:

public class EventDecorator implements DayViewDecorator {

    private final Drawable drawable;
    private final CalendarDay day;
    private final int color;

    public EventDecorator(MaterialCalendarView view, Date date, int color) {
        this.day = CalendarDay.from(date);
        this.color = color;
        this.drawable = createTintedDrawable(view.getContext(), color);
    }

    @Override
    public boolean shouldDecorate(CalendarDay day) {
        if (this.day.equals(day)) {
            return true;
        }
        return false;
    }

    @Override
    public void decorate(DayViewFacade view) {
        view.setSelectionDrawable(drawable);
    }

    private static Drawable createTintedDrawable(Context context, int color) {
        return applyTint(createBaseDrawable(context), color);
    }

    private static Drawable applyTint(Drawable drawable, int color) {
        Drawable wrappedDrawable = DrawableCompat.wrap(drawable);
        DrawableCompat.setTint(wrappedDrawable, color);
        return wrappedDrawable;
    }

    private static Drawable createBaseDrawable(Context context) {
        return ContextCompat.getDrawable(context, R.drawable.day);
    }
}

(注意，我使用了 this answer 中的代码来应用色调。此外，由于您没有指定，我假设可绘制对象是某种需要以这种方式着色的图像。)

下一步是创建一个 Event 类来存储您从 API 调用中解析的事件:

public class Event {

    private Date date;
    private int color;

    public Event(Date date, int color) {
        this.date = date;
        this.color = color;
    }

    public Date getDate() {
        return date;
    }

    public int getColor() {
        return color;
    }
}

现在我们需要向您的 onResponse() 方法添加逻辑以解析 JSON 并为每个事件添加装饰器。很难知道到底要写什么，因为您没有提供 JSON 示例。您之前的问题表明您已经知道如何解析 Date 所以我认为这就足够了。由于您尚未指定，我暂时将其保留。另外，我只是附加到您的代码 - 我不会尝试重构它太多。

@Override
public void onResponse(String response) {
    JSONObject object = null;
    try {
        object = new JSONObject(response);
    } catch (JSONException e) {
        e.printStackTrace();
    }

    JSONArray jsonarray = null;
    try {
        jsonarray = object.getJSONArray("Table");
    } catch (JSONException e) {
        e.printStackTrace();
    }

    SimpleDateFormatter formatter = new SimpleDateFormatter(); //TODO: update this line with the correct formatter
    List<Event> events = new ArrayList<>();
    for (int i = 0; i < jsonarray.length(); i++) {
        try {
            JSONObject obj = jsonarray.getJSONObject(i);
            String str2 = obj.optString("eventdate");
            String str1 = obj.optString("eventcolor"); 
            Date date = formatter.parse(str2);
            int color = Integer.parseInt(str1); //TODO: update this line with the correct code to parse your color
            Event event = new Event(date, color);
            events.add(event);
        }
        catch (JSONException e) {
            e.printStackTrace();
        }
    }

    for (Event event : events) {
        EventDecorator eventDecorator = new EventDecorator(calendarView, event.getDate(), event.getColor());
        calendarView.addDecorator(eventDecorator);
    }
}