Android編程鬧鐘設置方法詳解

2019-10-23 20:08:39

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來源：轉載

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本文實例講述了Android編程鬧鐘設置方法。分享給大家供大家參考，具體如下：

鬧鐘在生活中最常見了，在Android中可以通過AlarmManager來實現鬧鐘，AlarmManager類專門用來設置在某個指定的時間去完成指定的時間。AlarmManager就會通過onReceive()方法去執行這些事件，就算系統處于待機狀態，同樣不會影響運行。可以通過Context.getSystemService方法來獲得該服務。AlarmManager中的方法不少，如下：

方法	說明
Cancel	取消AlarmManager服務
Set	設置AlarmManager服務
setInexactRepeating	設置不精確周期
SetRepeating	設置重復周期
setTimeZone	設置時區

要實現鬧鐘，首先需要創建一個繼承自BroadcastReceiver的類，實現onReceive方法來接受這個Alarm服務，然后通過建立Intent和PendingIntent連接來調用Alarm組件。通過TimerPickerDialog來設置鬧鈴時間，當時間到了我們指定的時間后onReceiver方法接受到Alarm服務后的界面。

首先實現接受Alarm服務的AlarmReceiver類，用Toast類提示用戶

public class AlarmReceiver extends BroadcastReceiver {  @Override  public void onReceive(Context arg0, Intent arg1) {    // TODO Auto-generated method stub    Toast.makeText(arg0, "你設置的鬧鈴時間到了", Toast.LENGTH_LONG).show();  }}

由于使用了BroadcastReceiver服務，因此需要再AndroidManifest.xml中進行聲明：

<receiver  android:name=".AlarmReceiver"  android:process=":remote"></receiver>

然后需要設置鬧鈴和取消鬧鈴的時間進行監聽：

package cn.edu.pku;import java.util.Calendar;import android.app.Activity;import android.app.AlarmManager;import android.app.PendingIntent;import android.app.TimePickerDialog;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.TimePicker;public class AlarmActivity extends Activity {  /** Called when the activity is first created. */  Button mButton1;  Button mButton2;  TextView mTextView;  Calendar calendar;  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    calendar=Calendar.getInstance();    mTextView=(TextView)findViewById(R.id.TextView01);    mButton1=(Button)findViewById(R.id.Button01);    mButton2=(Button)findViewById(R.id.Button02);    mButton1.setOnClickListener(new View.OnClickListener() {      public void onClick(View v) {        // TODO Auto-generated method stub        calendar.setTimeInMillis(System.currentTimeMillis());        int hour = calendar.get(Calendar.HOUR_OF_DAY);        int minute = calendar.get(Calendar.MINUTE);        new TimePickerDialog(AlarmActivity.this, new TimePickerDialog.OnTimeSetListener() {          public void onTimeSet(TimePicker view, int hourOfDay, int minute) {            // TODO Auto-generated method stub            calendar.setTimeInMillis(System.currentTimeMillis());            calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);            calendar.set(Calendar.MINUTE, minute);            calendar.set(Calendar.SECOND, 0);            calendar.set(Calendar.MILLISECOND, 0);            Intent intent = new Intent(AlarmActivity.this, AlarmReceiver.class);            PendingIntent pendingIntent = PendingIntent.getBroadcast(AlarmActivity.this, 0, intent, 0);            AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);            alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (10 * 1000),                (24 * 60 * 60 * 1000), pendingIntent);            String tmps = "設置鬧鐘時間為" + format(hourOfDay) + ":" +format(minute);            mTextView.setText(tmps);          }        }, hour, minute, true).show();      }    });    mButton2.setOnClickListener(new View.OnClickListener() {      public void onClick(View v) {        // TODO Auto-generated method stub        Intent intent = new Intent(AlarmActivity.this, AlarmReceiver.class);        PendingIntent pendingIntent = PendingIntent.getBroadcast(AlarmActivity.this, 0, intent, 0);        AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);        alarmManager.cancel(pendingIntent);        mTextView.setText("鬧鈴已取消！");      }    });  }  private String format(int time){    String str = "" + time;    if(str.length() == 1){      str = "0" + str;    }    return str;  }}

效果如下：

設置鬧鈴

Android編程,鬧鐘,設置方法