安卓自定义日历选择器

好久没有写博客了，这些时间忙着写Android盒子应用，反正代码写得有些晕。
期间学习实现一个极简单的日历选择器功能，列表显示指定月份的时间，当天时间红圈表示。后期增加功能是添加闹钟等功能。
直接贴代码：

//自定论的日历列表
public class CustomCalendar extends LinearLayout {

    //返回（查看上一个月）
    private ImageView back_iv;
    //查看下一个月
    private ImageView next_iv;
    private TextView title;
    private MyGridView gridview;
    //定义系统日历
    private Calendar mCalendar = Calendar.getInstance();
    private String titleFormat = "MM yyyy";
    private CalendarAdapter mAdapter;
    private List<Date> dateList;

    public CalendarAdapter getmAdapter() {
        return mAdapter;
    }

    public CustomCalendar(Context context) {
        super(context);
    }

    public CustomCalendar(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CustomCalendar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initUI(context);
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.custom_calendar);
        if (!TextUtils.isEmpty(typedArray.getString(R.styleable.custom_calendar_timeFormat))) {
            titleFormat = typedArray.getString(R.styleable.custom_calendar_timeFormat);
        }
        typedArray.recycle();
    }


    /**
     * @description 初始化界面
     * @author ldm
     * @time 2017/5/4 9:16
     */
    private void initUI(Context context) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View view = LayoutInflater.from(context).inflate(R.layout.calendar_layout, null);
        back_iv = (ImageView) view.findViewById(R.id.back_iv);
        next_iv = (ImageView) view.findViewById(R.id.next_iv);
        title = (TextView) view.findViewById(R.id.calendar_title);
        gridview = (MyGridView) view.findViewById(R.id.gridview);
        dateList = new ArrayList<>();
        addView(view);
        initEvents();
        initDate();
    }

    /**
     * @description 控件监听事件
     * @author ldm
     * @time 2017/5/4 9:24
     */
    private void initEvents() {
        back_iv.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                mCalendar.add(Calendar.MONTH, -1);
                initDate();
            }
        });
        next_iv.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                mCalendar.add(Calendar.MONTH, 1);
                initDate();
            }
        });
        title.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });
        gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Date date = dateList.get(i);
                String s = date.getMonth() + 1 + "月" + date.getDate() + "日";
                Toast.makeText(view.getContext(), s, Toast.LENGTH_LONG).show();
            }
        });
        gridview.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
                view.getContext().startActivity(new Intent(view.getContext(), AlarmClockActivity.class));
                return true;
            }
        });
    }

    /**
     * @description
     * @author ldm
     * @time 2017/5/4 9:26
     */
    private void initDate() {
        SimpleDateFormat sdf = new SimpleDateFormat(titleFormat);
        //设置标题
        title.setText(sdf.format(mCalendar.getTime()));
        Log.e("INNOPRO", sdf.format(mCalendar.getTime()));
        dateList.clear();
        Calendar tempCalendar = (Calendar) mCalendar.clone();
        tempCalendar.set(Calendar.DAY_OF_MONTH, 1);
        int preDays = tempCalendar.get(Calendar.DAY_OF_WEEK) - 1;
        tempCalendar.add(Calendar.DAY_OF_MONTH, -preDays);
        int maxDays = 7 * 6;
        while (dateList.size() < maxDays) {
            dateList.add(tempCalendar.getTime());
            tempCalendar.add(Calendar.DAY_OF_MONTH, 1);
        }
        mAdapter = new CalendarAdapter(getContext(), dateList);
        gridview.setAdapter(mAdapter);
    }
}

简单处理的GridView:

public class MyGridView extends GridView {
    public boolean isOnMeasure;  
    public MyGridView(Context context) {
        super(context);  
    }  

    public MyGridView(Context context, AttributeSet attrs) {
        super(context, attrs);  
    }  


    public MyGridView(Context context, AttributeSet attrs, int defStyle) {  
        super(context, attrs, defStyle);  
    }  

    @Override  
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  
        isOnMeasure = true;  
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);  
    }  

    @Override  
    protected void onLayout(boolean changed, int l, int t, int r, int b) {  
        isOnMeasure = false;  
        super.onLayout(changed, l, t, r, b);  
    }  
}  

在Activity中使用：
1，布局：

<com.ldm.calendar.view.CustomCalendar
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/calendar_view"
        >

</com.ldm.calendar.view.CustomCalendar>

2，代码中使用（后续功能还在继续中…）：

  private CustomCalendar calendarView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        calendarView = (CustomCalendar) findViewById(R.id.calendar_view);
    }

日历控件中用到的适配器：

public class CalendarAdapter extends BaseAdapter {
    private LayoutInflater mInflater;
    private Context mContext;
    private List<Date> dateList;


    public CalendarAdapter(Context mContext, List<Date> date) {
        this.mContext = mContext;
        this.dateList = date;
        Log.e("INNOPRO", "Data size: " + dateList.size());
        mInflater = LayoutInflater.from(mContext);
    }

    @Override
    public int getCount() {
        return dateList.size();
    }

    @Override
    public Object getItem(int i) {
        return dateList.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @NonNull
    @Override
    public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        ViewHolder viewHolder;
        if (convertView == null) {
            viewHolder = new ViewHolder();
            convertView = mInflater.inflate(R.layout.calendar_item, null);
            viewHolder.item_tv = (TodayTextView) convertView.findViewById(R.id.item_tv);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        //处理getView方法多次调用问题
        if (((MyGridView) parent).isOnMeasure) {
            //如果是onMeasure调用的就立即返回
            return convertView;
        }
        Date date = dateList.get(position);
        viewHolder.item_tv.setText(String.valueOf(date.getDate()));
        Log.e("INNOPRO", "getView: " + String.valueOf(date.getDate()));
        Date now = new Date();
        if (date.getMonth() == now.getMonth()) {//是本月内的日期
            viewHolder.item_tv.setTextColor(Color.parseColor("#333333"));
        } else {
            viewHolder.item_tv.setTextColor(Color.parseColor("#666666"));
        }
        //如果是当天日期
        if (now.getDate() == date.getDate() && now.getMonth() == date.getMonth() && now.getYear() == date.getYear()) {
            viewHolder.item_tv.setToday(true);
            viewHolder.item_tv.setTextColor(Color.parseColor("#ff0000"));
        } else {
            viewHolder.item_tv.setToday(false);
        }
        return convertView;
    }

    final class ViewHolder {
        TodayTextView item_tv;
    }
}

丑陋的效果图：