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：