本文實(shí)例講述了android手機(jī)鬧鐘用法。分享給大家供大家參考。具體如下：
一、開發(fā)手機(jī)鬧鐘主要用到了alarmmanager類，alarmmanager類提供了訪問系統(tǒng)定時(shí)服務(wù)的途徑，開發(fā)人員可以在程序中設(shè)置某個(gè)應(yīng)用程序在未來的某個(gè)時(shí)刻被執(zhí)行。當(dāng)alarmmanager定時(shí)時(shí)間到了之后，當(dāng)初注冊(cè)的intent對(duì)象將會(huì)被系統(tǒng)廣播，進(jìn)而啟動(dòng)目標(biāo)程序。
二、在程序運(yùn)行時(shí)當(dāng)需要使用alarmmanager類時(shí)，可以通過context對(duì)象的getsystemservice(context.alarm_service)方法來獲得alarmmanager對(duì)象。
以下程序中使用時(shí)間選擇對(duì)話框設(shè)置鬧鐘的時(shí)間。
main.xml布局文件：
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<?xml version="1.0" encoding="utf-8"?><linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <button android:id="@+id/btn" android:text="設(shè)置鬧鐘" android:layout_width="fill_parent" android:layout_height="wrap_content" /></linearlayout> |
清單文件：
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<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ljq.activity" android:versioncode="1" android:versionname="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".mainactivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.main" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> <activity android:name=".alarmactivity" /> <!-- android:process=":remote": 新開一個(gè)進(jìn)程 --> <receiver android:name=".alarmreceiver" android:process=":remote"/> </application> <uses-sdk android:minsdkversion="7" /></manifest> |
alarmreceiver類：
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package com.ljq.activity;import android.content.broadcastreceiver;import android.content.context;import android.content.intent;public class alarmreceiver extends broadcastreceiver{ @override public void onreceive(context context, intent intent) { intent i=new intent(context, alarmactivity.class); i.addflags(intent.flag_activity_new_task); context.startactivity(i); }} |
alarmactivity類：
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package com.ljq.activity;import android.app.activity;import android.app.alertdialog;import android.content.dialoginterface;import android.content.dialoginterface.onclicklistener;import android.os.bundle;public class alarmactivity extends activity { @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); //顯示對(duì)話框 new alertdialog.builder(alarmactivity.this). settitle("鬧鐘").//設(shè)置標(biāo)題 setmessage("時(shí)間到了！").//設(shè)置內(nèi)容 setpositivebutton("知道了", new onclicklistener(){//設(shè)置按鈕 public void onclick(dialoginterface dialog, int which) { alarmactivity.this.finish();//關(guān)閉activity } }).create().show(); }} |
mainactivity類：
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package com.ljq.activity;import java.util.calendar;import android.app.activity;import android.app.alarmmanager;import android.app.dialog;import android.app.pendingintent;import android.app.timepickerdialog;import android.content.context;import android.content.intent;import android.os.bundle;import android.view.view;import android.widget.button;import android.widget.timepicker;import android.widget.toast;public class mainactivity extends activity{ private button btn=null; private alarmmanager alarmmanager=null; calendar cal=calendar.getinstance(); final int dialog_time = 0; //設(shè)置對(duì)話框id @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); alarmmanager=(alarmmanager)getsystemservice(context.alarm_service); btn=(button)findviewbyid(r.id.btn); btn.setonclicklistener(new view.onclicklistener(){ public void onclick(view view) { showdialog(dialog_time);//顯示時(shí)間選擇對(duì)話框 } }); } @override protected dialog oncreatedialog(int id) { dialog dialog=null; switch (id) { case dialog_time: dialog=new timepickerdialog( this, new timepickerdialog.ontimesetlistener(){ public void ontimeset(timepicker timepicker, int hourofday,int minute) { calendar c=calendar.getinstance();//獲取日期對(duì)象 c.settimeinmillis(system.currenttimemillis()); //設(shè)置calendar對(duì)象 c.set(calendar.hour, hourofday); //設(shè)置鬧鐘小時(shí)數(shù) c.set(calendar.minute, minute); //設(shè)置鬧鐘的分鐘數(shù) c.set(calendar.second, 0); //設(shè)置鬧鐘的秒數(shù) c.set(calendar.millisecond, 0); //設(shè)置鬧鐘的毫秒數(shù) intent intent = new intent(mainactivity.this, alarmreceiver.class); //創(chuàng)建intent對(duì)象 pendingintent pi = pendingintent.getbroadcast(mainactivity.this, 0, intent, 0); //創(chuàng)建pendingintent //alarmmanager.set(alarmmanager.rtc_wakeup, c.gettimeinmillis(), pi); //設(shè)置鬧鐘 alarmmanager.set(alarmmanager.rtc_wakeup, system.currenttimemillis(), pi); //設(shè)置鬧鐘，當(dāng)前時(shí)間就喚醒 toast.maketext(mainactivity.this, "鬧鐘設(shè)置成功", toast.length_long).show();//提示用戶 } }, cal.get(calendar.hour_of_day), cal.get(calendar.minute), false); break; } return dialog; }} |
運(yùn)行結(jié)果：
希望本文所述對(duì)大家的android程序設(shè)計(jì)有所幫助。
