Android中日历控件的使用
16lz
2021-01-24
一.概述
因为项目中要用到选择日期的功能，所以特此来研究一下相关方面的知识，总结一下，也为了以后使用起来更加方便。
二.介绍
Android中自带了两个控件，DatePicker和TimePicker，分别用来选择日期和时间的，我们看看如何使用。
使用一
布局文件
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.example.calendardemo.MainActivity"> <DatePicker android:id="@+id/datepicker" android:layout_width="wrap_content" android:calendarViewShown="true" android:layout_height="wrap_content"/> <TimePicker android:id="@+id/timepicker" android:layout_width="wrap_content" android:layout_height="wrap_content"/>LinearLayout>这里有句代码控制是否显示日历视图
android:calendarViewShown="true"代码
public class MainActivity extends AppCompatActivity { private DatePicker datePicker; private TimePicker timePicker; private int year; private int month; private int day; private int hour; private int minute; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); datePicker = (DatePicker) findViewById(R.id.datepicker); timePicker = (TimePicker) findViewById(R.id.timepicker); timePicker.setIs24HourView(true); initData(); } public void initData(){ Calendar calendar = Calendar.getInstance(); year = calendar.get(Calendar.YEAR); month = calendar.get(Calendar.MONTH); day = calendar.get(Calendar.DAY_OF_MONTH); hour = calendar.get(Calendar.HOUR_OF_DAY); minute = calendar.get(Calendar.MINUTE); datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() { @Override public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) { Toast.makeText(MainActivity.this, year+"年"+monthOfYear+"月"+dayOfMonth+"日", Toast.LENGTH_SHORT).show(); } }); timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() { @Override public void onTimeChanged(TimePicker view, int hourOfDay, int minute) { Toast.makeText(MainActivity.this, hourOfDay+"时"+minute+"分", Toast.LENGTH_SHORT).show(); } }); }}效果图
我们将代码改成如下
android:calendarViewShown="false"效果图
可以看到日历控件已经没有了。
使用二
有时候我们需要将两个控件显示到一起，也就是水平排列，这时候怎么做呢，是不是修改布局文件就可以了呢？我们试试，我们把最外层的线性布局方向改为水平方向
我们看到时间控件显示不全了，接下来我们再将两个控件的weight都设置为1，让它们平分水平方向距离
这时候日期控件又显示不全了。
通过上面两种方式，说明我们如果将两个控件显示到一起的话会出现问题，下面我们来看看解决方案。
使用三
接下来我们要解决的就是如何让这两个控件显示在一起，并且都完整显示。
我们先看效果图
我们可以看到两个控件已经全部显示在了对话框中，下面直接给出实现代码
public class ChooseDateDialog { private static DatePicker datePicker; private static TimePicker timePicker; private int mYear; private int mMonth; private int mDay; private int mHour; private int mMinute; public void showDialog(Context context, final EditText editText) { View view = View.inflate(context, R.layout.dialog_date_time_layout, null); datePicker = (DatePicker) view.findViewById(R.id.date_picker); timePicker = (TimePicker) view.findViewById(R.id.time_picker); timePicker.setIs24HourView(true); resizePikcer(datePicker); resizePikcer(timePicker); initData(); new AlertDialog.Builder(context).setTitle("请选择日期").setView(view).setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm"); GregorianCalendar gregorianCalendar = new GregorianCalendar(mYear,mMonth,mDay,mHour,mMinute); String result = format.format(gregorianCalendar.getTime()); editText.setText(result); dialog.dismiss(); } }).create().show(); }; public void initData(){ Calendar calendar = Calendar.getInstance(); mYear = calendar.get(Calendar.YEAR); mMonth = calendar.get(Calendar.MONTH); mDay = calendar.get(Calendar.DAY_OF_MONTH); mHour = calendar.get(Calendar.HOUR_OF_DAY); mMinute = calendar.get(Calendar.MINUTE); datePicker.init(mYear, mMonth, mDay, new DatePicker.OnDateChangedListener() { @Override public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) { mYear = year; mMonth = monthOfYear; mDay = dayOfMonth; } }); timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() { @Override public void onTimeChanged(TimePicker view, int hourOfDay, int minute) { mHour = hourOfDay; mMinute = minute; } }); } private void resizePikcer(FrameLayout tp){ List npList = findNumberPicker(tp); for(NumberPicker np:npList){ resizeNumberPicker(np); } } /** * 得到viewGroup里面的numberpicker组件 * @param viewGroup * @return */ private List findNumberPicker(ViewGroup viewGroup){ List npList = new ArrayList(); View child = null; if(null != viewGroup){ for(int i = 0; i < viewGroup.getChildCount(); i++){ child = viewGroup.getChildAt(i); if(child instanceof NumberPicker){ npList.add((NumberPicker)child); } else if(child instanceof LinearLayout){ List result = findNumberPicker((ViewGroup)child); if(result.size()>0){ return result; } } } } return npList; } /* * 调整numberpicker大小 */ private void resizeNumberPicker(NumberPicker np){ LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); np.setLayoutParams(params); }} 更多相关文章
- 对 android apk 进行重新签名操作
- Android(安卓)TextView长按复制文本
- Android中的布局和控件
- 【Android(安卓)开发】：Android布局中的几种常用属性
- Android(安卓)UI控件之RadioGroup、RadioButton
- Android阴影效果与CardView版本适配的细节问题
- Android(安卓)中的ellipsize
- Android(安卓)Notification 用法的4种形式
- Android软件开发常用系统控件（一） TextView