这篇文章主要介绍Android实现闹钟小程序，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
创新互联建站是一家专注于网站设计、网站制作和遂宁服务器托管的网络公司，有着丰富的建站经验和案例。
Android是一种基于Linux内核的自由及开放源代码的操作系统，主要使用于移动设备，如智能手机和平板电脑，由美国Google公司和开放手机联盟领导及开发。
最近写了个闹钟的程序，看到SharedPreferences在一个程序中可以共享数据，SharedPreferences是一个轻量级的键值存储机制，只可以存储基本数据类型。我就拿来用用，没想到SharedPreferences太好了，真是轻量级的保存数据的好的工具，比sqlite好用多了！以后我又多了一种编程思想了，呵呵，所以现在分享给大家，特别注意这点：这个无法直接在多个程序间共享Preferences数据。程序关闭再打开时间仍然保留你上次设置的时间。这就是Preferences的作用！
程序欢迎界面：
点击设置闹钟界面：
点击闹钟设置中的设置后的界面：
闹钟时间到了弹出dialog：
设置重复想起闹钟后的界面：
点击返回键弹出的提示：
下面请看代码：
一、MainActivity中的代码：
package com.cn.daming;
import java.util.Calendar;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
public class MainActivity extends Activity {
TextView setTime1;
TextView setTime2;
TextView setTime3;
Button mButton1;
Button mButton2;
Button mButton3;
Button mButton4;
Button mButton5;
Button mButton6;
String time1String = null;
String time2String = null;
String time3String = null;
String defalutString = "目前无设置";
AlertDialog builder = null;
Calendar c=Calendar.getInstance();
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//取得活动的Preferences对象
SharedPreferences settings = getPreferences(Activity.MODE_PRIVATE);
time1String = settings.getString("TIME1", defalutString);
time2String = settings.getString("TIME2", defalutString);
time3String = settings.getString("TIME3", defalutString);
InitButton1();
InitButton2();
InitButton3();
InitButton4();
InitButton5();
InitButton6();
setTime1.setText(time1String);
setTime3.setText(time2String);
setTime2.setText(time3String);
}
public void InitButton1()
{
setTime1=(TextView) findViewById(R.id.setTime1);
mButton1=(Button)findViewById(R.id.mButton1);
mButton1.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
c.setTimeInMillis(System.currentTimeMillis());
int mHour=c.get(Calendar.HOUR_OF_DAY);
int mMinute=c.get(Calendar.MINUTE);
new TimePickerDialog(MainActivity.this,
new TimePickerDialog.OnTimeSetListener()
{
public void onTimeSet(TimePicker view,int hourOfDay,
int minute)
{
c.setTimeInMillis(System.currentTimeMillis());
c.set(Calendar.HOUR_OF_DAY,hourOfDay);
c.set(Calendar.MINUTE,minute);
c.set(Calendar.SECOND,0);
c.set(Calendar.MILLISECOND,0);
Intent intent = new Intent(MainActivity.this, CallAlarm.class);
PendingIntent sender=PendingIntent.getBroadcast(
MainActivity.this,0, intent, 0);
AlarmManager am;
am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP,
c.getTimeInMillis(),
sender
);
String tmpS=format(hourOfDay)+"："+format(minute);
setTime1.setText(tmpS);
//SharedPreferences保存数据，并提交
SharedPreferences time1Share = getPreferences(0);
SharedPreferences.Editor editor = time1Share.edit();
editor.putString("TIME1", tmpS);
editor.commit();
Toast.makeText(MainActivity.this,"设置大明闹钟时间为"+tmpS,
Toast.LENGTH_SHORT)
.show();
}
},mHour,mMinute,true).show();
}
});
}
public void InitButton2()
{
mButton2=(Button) findViewById(R.id.mButton2);
mButton2.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent(MainActivity.this, CallAlarm.class);
PendingIntent sender=PendingIntent.getBroadcast(
MainActivity.this,0, intent, 0);
AlarmManager am;
am =(AlarmManager)getSystemService(ALARM_SERVICE);
am.cancel(sender);
Toast.makeText(MainActivity.this,"大明闹钟时间删除",
Toast.LENGTH_SHORT).show();
setTime1.setText("目前无设置");
SharedPreferences time1Share = getPreferences(0);
SharedPreferences.Editor editor = time1Share.edit();
editor.putString("TIME1", "目前无设置");
editor.commit();
}
});
}
public void InitButton3()
{
setTime3=(TextView) findViewById(R.id.setTime5);
mButton3=(Button)findViewById(R.id.mButton5);
mButton3.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
c.setTimeInMillis(System.currentTimeMillis());
int mHour=c.get(Calendar.HOUR_OF_DAY);
int mMinute=c.get(Calendar.MINUTE);
new TimePickerDialog(MainActivity.this,
new TimePickerDialog.OnTimeSetListener()
{
public void onTimeSet(TimePicker view,int hourOfDay,
int minute)
{
c.setTimeInMillis(System.currentTimeMillis());
c.set(Calendar.HOUR_OF_DAY,hourOfDay);
c.set(Calendar.MINUTE,minute);
c.set(Calendar.SECOND,0);
c.set(Calendar.MILLISECOND,0);
Intent intent = new Intent(MainActivity.this, CallAlarm.class);
PendingIntent sender=PendingIntent.getBroadcast(
MainActivity.this,1, intent, 0);
AlarmManager am;
am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP,
c.getTimeInMillis(),
sender
);
String tmpS=format(hourOfDay)+"："+format(minute);
setTime3.setText(tmpS);
//SharedPreferences保存数据，并提交
SharedPreferences time2Share = getPreferences(1);
SharedPreferences.Editor editor = time2Share.edit();
editor.putString("TIME2", tmpS);
editor.commit();
Toast.makeText(MainActivity.this,"设置大明闹钟时间为"+tmpS,
Toast.LENGTH_SHORT)
.show();
}
},mHour,mMinute,true).show();
}
});
}
public void InitButton4()
{
mButton4=(Button) findViewById(R.id.mButton6);
mButton4.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent(MainActivity.this, CallAlarm.class);
PendingIntent sender=PendingIntent.getBroadcast(
MainActivity.this,0, intent, 0);
AlarmManager am;
am =(AlarmManager)getSystemService(ALARM_SERVICE);
am.cancel(sender);
Toast.makeText(MainActivity.this,"大明闹钟时间删除",
Toast.LENGTH_SHORT).show();
setTime3.setText("目前无设置");
//SharedPreferences保存数据，并提交
SharedPreferences time2Share = getPreferences(1);
SharedPreferences.Editor editor = time2Share.edit();
editor.putString("TIME2", "目前无设置");
editor.commit();
}
});
}
public void InitButton5()
{
setTime2=(TextView) findViewById(R.id.setTime2);
LayoutInflater factory = LayoutInflater.from(this);
final View setView = factory.inflate(R.layout.timeset,null);
final TimePicker tPicker=(TimePicker)setView
.findViewById(R.id.tPicker);
tPicker.setIs24HourView(true);
final AlertDialog di=new AlertDialog.Builder(MainActivity.this)
.setIcon(R.drawable.clock)
.setTitle("设置")
.setView(setView)
.setPositiveButton("确定",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
EditText ed=(EditText)setView.findViewById(R.id.mEdit);
int times=Integer.parseInt(ed.getText().toString())
*1000;
c.setTimeInMillis(System.currentTimeMillis());
c.set(Calendar.HOUR_OF_DAY,tPicker.getCurrentHour());
c.set(Calendar.MINUTE,tPicker.getCurrentMinute());
c.set(Calendar.SECOND,0);
c.set(Calendar.MILLISECOND,0);
Intent intent = new Intent(MainActivity.this,
CallAlarm.class);
PendingIntent sender = PendingIntent.getBroadcast(
MainActivity.this,1, intent, 0);
AlarmManager am;
am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP,
c.getTimeInMillis(),times,sender);
String tmpS=format(tPicker.getCurrentHour())+"："+
format(tPicker.getCurrentMinute());
String subStr = "设置大明闹钟时间为"+tmpS+
"开始，重复间隔为"+times/1000+"秒";
setTime2.setText("设置大明闹钟时间为"+tmpS+
"开始，重复间隔为"+times/1000+"秒");
//SharedPreferences保存数据，并提交
SharedPreferences time3Share = getPreferences(2);
SharedPreferences.Editor editor = time3Share.edit();
editor.putString("TIME3", subStr);
editor.commit();
Toast.makeText(MainActivity.this,"设置大明闹钟为"+tmpS+
"开始，重复间隔为"+times/1000+"秒",
Toast.LENGTH_SHORT).show();
}
})
.setNegativeButton("取消",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
}
}).create();
mButton5=(Button) findViewById(R.id.mButton3);
mButton5.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
c.setTimeInMillis(System.currentTimeMillis());
tPicker.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
tPicker.setCurrentMinute(c.get(Calendar.MINUTE));
di.show();
}
});
}
public void InitButton6()
{
mButton6=(Button) findViewById(R.id.mButton4);
mButton6.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent(MainActivity.this, CallAlarm.class);
PendingIntent sender = PendingIntent.getBroadcast(
MainActivity.this,1, intent, 0);
AlarmManager am;
am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.cancel(sender);
Toast.makeText(MainActivity.this,"闹钟时间删除",
Toast.LENGTH_SHORT).show();
setTime2.setText("目前无设置");
//SharedPreferences保存数据，并提交
SharedPreferences time3Share = getPreferences(2);
SharedPreferences.Editor editor = time3Share.edit();
editor.putString("TIME3", "目前无设置");
editor.commit();
}
});
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_BACK){
builder = new AlertDialog.Builder(MainActivity.this)
.setIcon(R.drawable.clock)
.setTitle("温馨提示：")
.setMessage("您是否要退出大明闹钟程序!!!")
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
MainActivity.this.finish();
}
})
.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
builder.dismiss();
}
}).show();
}
return true;
}
private String format(int x)
{
String s=""+x;
if(s.length()==1) s="0"+s;
return s;
}
}二、CallAlarm中的代码：
package com.cn.daming;
import android.content.Context;
import android.content.Intent;
import android.content.BroadcastReceiver;
import android.os.Bundle;
public class CallAlarm extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
Intent i = new Intent(context, AlarmAlert.class);
Bundle bundleRet = new Bundle();
bundleRet.putString("STR_CALLER", "");
i.putExtras(bundleRet);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}三、AlarmAlert中的代码：
package com.cn.daming;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
public class AlarmAlert extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
new AlertDialog.Builder(AlarmAlert.this)
.setIcon(R.drawable.clock)
.setTitle("大明闹钟响了!!")
.setMessage("快完成你制定的计划吧!!!")
.setPositiveButton("关掉它",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int whichButton)
{
AlarmAlert.this.finish();
}
})
.show();
}
}四、main.xml布局文件的代码：
五、timeset.xml布局文件中的代码：
六、string.xml中的代码：