Android自定义闹钟

Android闹钟alarmManager+PendingIntent

这次给大家分享两种闹钟：

第一种是当到达闹钟时间后执行一次相应的操作

alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);

第二种是当到达闹钟时间后每隔一段时间执行操作

  alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);

下面看效果图：

设置两种闹钟

选择闹钟时间

闹钟一到打开一个界面

下面看代码：

public class Alarm2Activity extends AppCompatActivity {

    private AlarmManager alarmManager;
    private PendingIntent pendingIntent;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_alarm2);
        //实例化闹钟个管理器
        alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

    }

    //设置闹钟（只响一次）
    public void startAlarmOne(View view){
        //获取当前系统的时间
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);
        int minute=calendar.get(Calendar.MINUTE);

        //弹出时间对话框（选择时间）
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker timePicker, int i, int i1) {
                //获取当前系统的时间
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,i);
                c.set(Calendar.MINUTE,i1);
                //打开一个Activity
                Intent intent=new Intent();
                intent.setAction("com.example.myandroid_27.ALARM");
                PendingIntent pendingIntent= PendingIntent.getBroadcast(Alarm2Activity.this,0x101,intent,0);
                //设置闹钟
                alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
            }
        },hour,minute,true);
        timePickerDialog.show();
    }
    //设置闹钟（在多长时间后闹钟响然后继续计时）
    public void startAlarmTwo(View view){
        //获取当前系统的时间
        Calendar calendar=Calendar.getInstance();
        int h=calendar.get(Calendar.HOUR_OF_DAY);
        int m=calendar.get(Calendar.MINUTE);
        //弹出时间对话框（选择时间）
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker timePicker, int i, int i1) {
                //获取选择的闹钟时间
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,i);
                c.set(Calendar.MINUTE,i1);
                //打开一个Activity
                Intent  intent=new Intent();
                intent.setAction("com.example.myandroid_27.ALARM");
                pendingIntent = PendingIntent.getBroadcast(Alarm2Activity.this,0x102,intent,0);
                //闹钟什么时候继续执行
                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);
            }
        },h,m,true);
        timePickerDialog.show();
    }
    //关闭周期闹钟
    public void startAlarmThree(View view){
        alarmManager.cancel(pendingIntent);
    }
}