android 倒计时器通知

enyaitl3  于 2023-02-17  发布在  Android
关注(0)|答案(1)|浏览(207)

我在Android编程乞丐,我必须做一个CountdownTimer,从用户使用两个数字选择器(一个小时和其他分钟)选择的数字开始。
特征必须是:

  • CountdownTimer必须在后台工作,并通知用户,当它到达00:00.我有这个代码:
package com.android.application;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.NumberPicker;

public class MainActivity extends Activity {
NotificationManager nm;
private static final int ID_NOTIFICACION_PERSONAL =1;

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

NumberPicker number1 = (NumberPicker)findViewById(R.id.horas);
NumberPicker number2 = (NumberPicker)findViewById(R.id.minutos);
Button btn_lanzar=(Button)findViewById(R.id.btn_notificacion);
number1.setMaxValue(10);
number1.setMinValue(0);
number2.setMinValue(0);
number2.setMaxValue(59);

int number3=number1.getValue();
int number4=number2.getValue();

nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
btn_lanzar.setOnClickListener(new View.OnClickListener(){
    @Override 
    public void onClick(View v) {
    Notification notification = new Notification(R.drawable.estacionamiento,"Estacionamiento Inteligente",System.currentTimeMillis());    
    PendingIntent intencionpendiente = PendingIntent.getActivity(getApplicationContext(),0, new Intent (getApplicationContext(),Segunda_ventana.class),0);
    notification.setLatestEventInfo(getApplicationContext(), "Estacionamiento Inteligente", "Su Tiempo se ha Terminado", intencionpendiente);
    nm.notify(ID_NOTIFICACION_PERSONAL, notification);
    }

});
}

}

我不知道如何使CountdownTimer从用户选择的数字开始,并在完成时发出通知。
请来人帮帮我

7vux5j2d

7vux5j2d1#

使用Android的TimerTimerTask类。下面我假设您知道如何显示通知,就像您在问题中所做的那样。
在静态布局中定义一个Button以及数字选择器,如下所示:

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Start CountDown"
    android:onClick="startCountdown"
 />

上面我假设你也有你的号码采摘在同一布局。
Java活动代码可能如下所示:

NumberPicker hourPicker;
NumberPicker minutePicker;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    hourPicker = (NumberPicker)findViewById(R.id.horas);
    minutePicker = (NumberPicker)findViewById(R.id.minutos);
    hourPicker.setMaxValue(10);
    hourPicker.setMinValue(0);
    minutePicker.setMinValue(0);
    minutePicker.setMaxValue(59);
}

public void startCountdown(View v)
{
    //this fires when button was tapped
    showTimerStartedNotification();

    int hours = hourPicker.getValue();
    int mins = minutePicker.getValue();

    int millis = ((hours*60)+mins)*60000; // Need milliseconds to use Timer

    new Timer().schedule(new TimerTask()
    {
        @Override
        public void run()
        {
            //code that runs when timer is done
            showTimerFinishedNotification();
        }
    }, millis);
}

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