Android之设置闹钟

闹钟是我们日常生活中常用的一种设置，那么大家有没有研究过呢！今天博主就给大家讲解一下！

要做到闹钟这个功能，我们需要使用AlarmManager这个类。我们在设置闹钟的时候，首先会弹出时间对话框，获取时间，最后设置闹钟。思路简单，代码容易，话不多说，大家直接看吧！

public class MainActivity extends AppCompatActivity {

    private AlarmManager am;
    private PendingIntent pendingIntent;
    private NotificationManager notificationManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //获取闹钟管理器
        am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        //获取通知管理器
        notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    }
    public void setAlarmOnce(View view){
        //获取当前系统时间
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);
        int minute=calendar.get(Calendar.MINUTE);


         //1.弹出时间对话框
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,hourOfDay);
                c.set(Calendar.MINUTE,minute);
                //2.获取到时间      hourOfDay       minute
                //3.设置闹钟
                PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0x101,new Intent("com.zking.administrator.g160628_android29_alarm_notification.RING"),0);
                am.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
            }
        },hour,minute,true);
        timePickerDialog.show();
    }
    public void setAlarmRepeat(View view){
        //获取当前系统时间
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);
        int minute=calendar.get(Calendar.MINUTE);

        //1.弹出时间对话框
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,hourOfDay);
                c.set(Calendar.MINUTE,minute);
                //2.获取到时间      hourOfDay       minute
                //3.设置闹钟
                pendingIntent = PendingIntent.getBroadcast(MainActivity.this,0x102,new Intent("com.zking.administrator.RING"),0);
                am.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);
            }
        },hour,minute,true);
        timePickerDialog.show();
    }


    public void cancelAlarmRepeat(View view){
          am.cancel(pendingIntent);
    }


    public void send(View view){
         //实例化通知
        NotificationCompat.Builder builder=new NotificationCompat.Builder(this);
        builder.setContentTitle("提示");
        builder.setContentText("中奖啦！请先汇款到XXX账号激活");
        builder.setSmallIcon(android.R.drawable.star_on);
        builder.setDefaults(NotificationCompat.DEFAULT_ALL);
        builder.setAutoCancel(true);
//      builder.setContentIntent()
//        builder.setCustomContentView()
        Notification notification=builder.build();

        //发送通知
        notificationManager.notify(0x101,notification);
    }
}

public class RingActivity extends AppCompatActivity {

    private MediaPlayer mediaPlayer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ring);
        mediaPlayer = MediaPlayer.create(this, R.raw.c);
        mediaPlayer.start();
    }
    public void stop(View view){
        mediaPlayer.stop();
        finish();
    }
}

public class RingReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if("com.zking.administrator.g160628_android29_alarm_notification.RING".equals(intent.getAction())){
            Log.i("test","闹钟响了！！！");
            //跳转到Activity中
            Intent intent2=new Intent(context,RingActivity.class);
            intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent2);
        }
    }
}

最后大家千万不要忘记配置哦！

<activity android:name=".RingActivity"></activity>
        <receiver android:name=".RingReceiver"
            android:enabled="true"
            android:exported="true"
            >
            <intent-filter>
                <action android:name="com.administrator.RING"></action>
            </intent-filter>
        </receiver>
    </application>