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一个原生Android的日期选择器，多种样式可供选择

1. 日期选择器

/**     * 日期选择     *     * @param activity     * @param themeResId     * @param tv     * @param calendar     */    public static void showDatePickerDialog(Activity activity, int themeResId, final Button tv, Calendar calendar) {
           // 直接创建一个DatePickerDialog对话框实例，并将它显示出来        DatePickerDialog dialog = new DatePickerDialog(activity, themeResId, new DatePickerDialog.OnDateSetListener() {
               // 绑定监听器(How the parent is notified that the date is set.)            @Override            public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                   // 此处得到选择的时间，可以进行你想要的操作                tv.setText("您选择了：" + year + "年" + (monthOfYear + 1) + "月" + dayOfMonth + "日");            }        }                // 设置初始日期                , calendar.get(Calendar.YEAR)                , calendar.get(Calendar.MONTH)                , calendar.get(Calendar.DAY_OF_MONTH));        dialog.show();        dialog.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(activity.getResources().getColor(R.color.icu_blue));        dialog.getButton(AlertDialog.BUTTON_POSITIVE).setGravity(Gravity.RIGHT);    }

2.时间选择器

/**     * 时间选择     *     * @param activity     * @param themeResId     * @param tv     * @param calendar     */    public static void showTimePickerDialog(Activity activity, int themeResId, final Button tv, Calendar calendar) {
           // Calendar c = Calendar.getInstance();        // 创建一个TimePickerDialog实例，并把它显示出来        // 解释一哈，Activity是context的子类        new TimePickerDialog(activity, themeResId, new TimePickerDialog.OnTimeSetListener() {
               @Override            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                   tv.setText("您选择了：" + hourOfDay + "时" + minute + "分");            }        }                // 设置初始时间                , calendar.get(Calendar.HOUR_OF_DAY)                , calendar.get(Calendar.MINUTE)                // true表示采用24小时制                , true)                .show();    }

最后我们来看最后的使用方法

public class MainActivity extends AppCompatActivity {
       private Button button1, button2, button3;    DateFormat format = DateFormat.getDateTimeInstance();    Calendar calendar = Calendar.getInstance(Locale.CHINA);    @Override    protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        button1 = findViewById(R.id.button1);        button2 = findViewById(R.id.button2);        button3 = findViewById(R.id.button3);        button1.setOnClickListener(view -> {
               Intent intent = new Intent(this, TestActivity.class);            startActivity(intent);        });        button2.setOnClickListener(v -> {
               //showDatePickerDialog(this, R.style.dialog_date, button2, calendar);            showDatePickerDialog(this, 6, button2, calendar);        });        button3.setOnClickListener(v -> {
               showTimePickerDialog(this, 5, button3, calendar);        });    }

补充一下

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