Android中AlarmManager使用樣本（持續更新）

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現在普遍的手機都會有一個鬧鐘的功能，如果使用Android來實現一個鬧鐘可以使用AtarmManager來實現。AtarmManager提供了一種系統級的提示服務，允許你安排在將來的某個時間執行一個服務。AlarmManager對象一般不直接執行個體化，而是通過Context.getsystemservice(Context.ALARM_SERVICE）方法獲得。

下面是我們運用之前用到的TimePickerDialog結合AlarmManager，實現一個可以設定任意時間而且可以重複的鬧鐘，示範效果如下（大概每晚23:48會有鬧鐘通知）：

layout中activity_main.xml布局檔案代碼：

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout 3     xmlns:android="http://schemas.android.com/apk/res/android" 4     xmlns:tools="http://schemas.android.com/tools" 5     android:id="@+id/activity_main" 6     android:layout_width="match_parent" 7     android:layout_height="match_parent" 8     android:orientation="vertical" 9     tools:context="com.example.administrator.alarmdemo.MainActivity">10     <TextView11         android:id="@+id/time_tv"12         android:layout_width="match_parent"13         android:layout_height="wrap_content"14         android:hint="請設定鬧鈴時間"15         android:clickable="true"16         android:onClick="setTime"17         android:gravity="center"/>18     <TextView19         android:id="@+id/time_tv2"20         android:layout_width="match_parent"21         android:layout_height="wrap_content"22         android:hint="請設定響鈴間隔時間"23         android:clickable="true"24         android:onClick="setIntervalTime"25         android:gravity="center"/>26     <Button27         android:layout_width="match_parent"28         android:layout_height="wrap_content"29         android:onClick="open"30         android:text="開啟鬧鐘"/>31     <Button32         android:layout_width="match_parent"33         android:layout_height="wrap_content"34         android:onClick="stop"35         android:text="結束鬧鐘"/>36 </LinearLayout>

AndroidMainfest.xml設定檔（添加自訂重複鬧鈴receiver）：

 1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3     package="com.example.administrator.alarmdemo"> 4     <application 5         android:allowBackup="true" 6         android:icon="@mipmap/ic_launcher" 7         android:label="@string/app_name" 8         android:supportsRtl="true" 9         android:theme="@style/AppTheme">10         <activity android:name=".MainActivity">11             <intent-filter>12                 <action android:name="android.intent.action.MAIN" />13 14                 <category android:name="android.intent.category.LAUNCHER" />15             </intent-filter>16         </activity>17         <receiver18             android:name=".RepeatAlarmReceiver"19             android:enabled="true"20             android:exported="true">21             <intent-filter>22                 <action android:name="repeatAlarm" />23             </intent-filter>24         </receiver>25         <activity android:name=".Main2Activity"></activity>26     </application>27 28 </manifest>

RepeatAlarmReceiver.java廣播接收檔案：

 1 import android.content.BroadcastReceiver; 2 import android.content.Context; 3 import android.content.Intent; 4 import android.widget.Toast; 5  6 public class RepeatAlarmReceiver extends BroadcastReceiver { 7     public RepeatAlarmReceiver() { 8     } 9     @Override10     public void onReceive(Context context, Intent intent) {11         Toast.makeText(context, "重複鬧鐘", Toast.LENGTH_SHORT).show();12     }13 }

MainActivity.java代碼實現：

 1 import android.app.AlarmManager; 2 import android.app.PendingIntent; 3 import android.app.TimePickerDialog; 4 import android.content.Intent; 5 import android.provider.Settings; 6 import android.support.v7.app.AppCompatActivity; 7 import android.os.Bundle; 8 import android.view.View; 9 import android.widget.TextView;10 import android.widget.TimePicker;11 12 import java.util.Calendar;13 14 public class MainActivity extends AppCompatActivity {15     AlarmManager alarmManagerSet;16     PendingIntent pendingIntentSet;17     int myHour,myMinute;//設定響鈴時間18     int intervalHour,intervalMinute,intervalSecond;//設定間隔時間（響鈴周期）19     Calendar calendar;//聲明日曆20     TextView time_tv,time_tv2;21 22     @Override23     protected void onCreate(Bundle savedInstanceState) {24         super.onCreate(savedInstanceState);25         setContentView(R.layout.activity_main);26         alarmManagerSet= (AlarmManager) getSystemService(ALARM_SERVICE);27         calendar = Calendar.getInstance();28         myHour=calendar.get(Calendar.HOUR_OF_DAY);29         myMinute=calendar.get(Calendar.MINUTE);30 31         intervalHour=calendar.get(Calendar.HOUR_OF_DAY);32         intervalMinute=calendar.get(Calendar.MINUTE);33 34         time_tv= (TextView) findViewById(R.id.time_tv);35         time_tv2= (TextView) findViewById(R.id.time_tv2);36     }37     public void setTime(View view){38         TimePickerDialog timePickerDialog =new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {39             @Override40             public void onTimeSet(TimePicker view, int hourOfDay, int minute) {41                 myHour=hourOfDay;42                 myMinute=minute;43                 time_tv.setText(myHour+":"+myMinute);44             }45         },myHour,myMinute,true);46         timePickerDialog.show();47     }48     public void setIntervalTime(View view){49         TimePickerDialog timePickerDialog =new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {50             @Override51             public void onTimeSet(TimePicker view, int hourOfDay, int minute) {52                 intervalHour=hourOfDay;53                 intervalMinute=minute;54                 time_tv2.setText(intervalHour+":"+intervalMinute);55             }56         },intervalHour,intervalMinute,true);57         timePickerDialog.show();58     }59     public void open(View view){60         String[] triggerTime=time_tv.getText().toString().split(":");61         String[] intervalTime=time_tv2.getText().toString().split(":");62         long triggerAtMillis= Integer.parseInt(triggerTime[0])*1000*60*60+Integer.parseInt(triggerTime[1])*60*1000+System.currentTimeMillis();63         long intervalMillis=Integer.parseInt(intervalTime[0])*1000*60*60+Integer.parseInt(intervalTime[1])*60*1000;64         pendingIntentSet = PendingIntent.getBroadcast(this,0,new Intent("repeatAlarm"),0);65         alarmManagerSet.setRepeating(AlarmManager.RTC_WAKEUP,triggerAtMillis,intervalMillis,pendingIntentSet);66     }67     public void stop(View v){68         alarmManagerSet.cancel(pendingIntentSet);69     }70 }

 

Android中AlarmManager使用樣本（持續更新）