日历，时钟，计时器
package com.example.mybaseuii;import androidx.appcompat.app.AppCompatActivity;import android.app.Activity;import android.os.Bundle;import android.os.SystemClock;import android.widget.Chronometer;import android.widget.DatePicker;import android.widget.TimePicker;import android.widget.Toast;import java.util.Calendar;public class MainActivity extends Activity { int year,month,day; DatePicker datePicker = null; TimePicker timePicker = null; Chronometer chronometer = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); datePicker = (DatePicker) findViewById(R.id.datepicker); Calendar calendar = Calendar.getInstance(); year = calendar.get(Calendar.YEAR); month = calendar.get(Calendar.MONTH); day = calendar.get(Calendar.DAY_OF_MONTH); //初始化日期选择器 datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() { @Override public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) { MainActivity.this.year=year; MainActivity.this.month=day; MainActivity.this.day=day; show(year,month,day); } }); //时钟 timePicker = (TimePicker)findViewById(R.id.timepicker); timePicker.setIs24HourView(true);//设置成24小时的 timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() { @Override public void onTimeChanged(TimePicker view, int hourOfDay, int minute) { String string = hourOfDay + "时" + minute + "分"; Toast.makeText(MainActivity.this,string, Toast.LENGTH_SHORT).show(); } }); //计时器 chronometer = (Chronometer) findViewById(R.id.chronometer); //设置起始时间,获取系统时间 chronometer.setBase(SystemClock.elapsedRealtime()); chronometer.setFormat("%s");//字符串模式 chronometer.start(); chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() { @Override public void onChronometerTick(Chronometer chronometer) { if(SystemClock.elapsedRealtime()- chronometer.getBase()>=60000){ chronometer.stop(); } } }); } private void show(int year,int month,int day){ String str = year+"年"+(month+1)+"月"+day+"日"; Toast.makeText(MainActivity.this,str, Toast.LENGTH_SHORT).show(); }}调用方式
package com.example.mybaseuii;import androidx.appcompat.app.AppCompatActivity;import android.app.Activity;import android.os.Bundle;import android.os.SystemClock;import android.widget.Chronometer;import android.widget.DatePicker;import android.widget.TimePicker;import android.widget.Toast;import java.util.Calendar;public class MainActivity extends Activity { int year,month,day; DatePicker datePicker = null; TimePicker timePicker = null; Chronometer chronometer = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); datePicker = (DatePicker) findViewById(R.id.datepicker); Calendar calendar = Calendar.getInstance(); year = calendar.get(Calendar.YEAR); month = calendar.get(Calendar.MONTH); day = calendar.get(Calendar.DAY_OF_MONTH); //初始化日期选择器 datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() { @Override public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) { MainActivity.this.year=year; MainActivity.this.month=day; MainActivity.this.day=day; show(year,month,day); } }); //时钟 timePicker = (TimePicker)findViewById(R.id.timepicker); timePicker.setIs24HourView(true);//设置成24小时的 timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() { @Override public void onTimeChanged(TimePicker view, int hourOfDay, int minute) { String string = hourOfDay + "时" + minute + "分"; Toast.makeText(MainActivity.this,string, Toast.LENGTH_SHORT).show(); } }); //计时器 chronometer = (Chronometer) findViewById(R.id.chronometer); //设置起始时间,获取系统时间 chronometer.setBase(SystemClock.elapsedRealtime()); chronometer.setFormat("%s");//字符串模式 chronometer.start(); chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() { @Override public void onChronometerTick(Chronometer chronometer) { if(SystemClock.elapsedRealtime()- chronometer.getBase()>=60000){ chronometer.stop(); } } }); } private void show(int year,int month,int day){ String str = year+"年"+(month+1)+"月"+day+"日"; Toast.makeText(MainActivity.this,str, Toast.LENGTH_SHORT).show(); }}
呈现界面
