Question

我正在尝试使用timepicker在选定的小时内关闭应用程序。我有这个代码，但它还没有工作。我按下按钮并选择了小时，但它没有断电。

   public class ContadorproActivity extends ActionBarActivity {
TimePicker timePicker;
Button contadorpro;

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

    timePicker = (TimePicker) findViewById(R.id.timePicker);
    timePicker.setIs24HourView(true);

}
public void onClick(View view) {
    Toast.makeText(getBaseContext(), "Hora seleccionada:" + timePicker.getCurrentHour() +
            ":" + timePicker.getCurrentMinute(), Toast.LENGTH_SHORT).show();
    Calendar c = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat("dd:MMMM:yyyy HH:mm:ss ");
    int hour = timePicker.getCurrentHour();
    int minute = timePicker.getCurrentMinute();
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, minute);

    Intent myIntent = new Intent(ContadorproActivity.this, MyReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(ContadorproActivity.this, 0, myIntent,0);

    AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
    alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
}

还有java.class：

   public class MyReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    // Run your stuff
    Toast.makeText(context, "OnReceive!", Toast.LENGTH_SHORT).show();
    android.os.Process.killProcess(android.os.Process.myPid());
}

}

Answer 1

获得特定时间后，您可以使用AlarmManager服务触发确切的警报（使用setExact（）方法），您可以在此处调用关闭。您可以在此处阅读有关AlarmManager的更多信息：AlarmManager - setExact()

请记住，如果您需要在系统重新启动后继续此倒计时，则可能需要额外处理。

Answer 2

您可以使用AlarmManager在所需日期安排闹钟：

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, hour);
calendar.set(Calendar.MINUTE, minute);

Intent myIntent = new Intent(MainActivity.this, MyReceiver.class);
pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent,0);

AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);

实施BroadcastReceiver以执行您的操作：

public class MyReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // Run your stuff
        Toast.makeText(context, "OnReceive!", Toast.LENGTH_SHORT).show();
    }
}

编辑：

请记住在Manifest中声明您的BroadcastReceiver：

<receiver android:name="<com.package.app>.MyReceiver " />

使用TimePicker进行倒计时

2 个答案: