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);    }}

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