重新啓動後報警沒有調用

Question

我已經創建了一個程序，它會根據日期選擇器手動創建不同的日期集。 的代碼工作properly.but如果重新啓動它丟失數據和報警不工作我怎樣才能克服

我使用的代碼

int count; 
@Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    OnClickListener setClickListener = new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      /** This intent invokes the activity DemoActivity, which in turn opens the AlertDialog window */ 
      Intent i = new Intent("in.com.example.demoactivity"); 

      /** Creating a Pending Intent */ 
      PendingIntent operation = PendingIntent.getActivity(getBaseContext(), count++, i, Intent.FLAG_ACTIVITY_NEW_TASK); 

      /** Getting a reference to the System Service ALARM_SERVICE */ 
      AlarmManager alarmManager = (AlarmManager) getBaseContext().getSystemService(ALARM_SERVICE); 

      /** Getting a reference to DatePicker object available in the MainActivity */ 
      DatePicker dpDate = (DatePicker) findViewById(R.id.dp_date); 

      /** Getting a reference to TimePicker object available in the MainActivity */ 
      TimePicker tpTime = (TimePicker) findViewById(R.id.tp_time); 

      int year = dpDate.getYear(); 
      int month = dpDate.getMonth(); 
      int day = dpDate.getDayOfMonth(); 
      int hour = tpTime.getCurrentHour(); 
      int minute = tpTime.getCurrentMinute(); 


      GregorianCalendar calendar = new GregorianCalendar(year,month,day, hour, minute); 

      long alarm_time = calendar.getTimeInMillis(); 

      /** Setting an alarm, which invokes the operation at alart_time */ 
      alarmManager.set(AlarmManager.RTC_WAKEUP , alarm_time , operation); 

      /** Alert is set successfully */ 
      Toast.makeText(getBaseContext(), "Alarm is set successfully",Toast.LENGTH_SHORT).show(); 

     } 
    };  

    OnClickListener quitClickListener = new OnClickListener() {   
     @Override 
     public void onClick(View v) { 
      finish(); 
     } 
    }; 

    Button btnSetAlarm = (Button) findViewById(R.id.btn_set_alarm); 
    btnSetAlarm.setOnClickListener(setClickListener); 

    Button btnQuitAlarm = (Button) findViewById(R.id.btn_quit_alarm); 
    btnQuitAlarm.setOnClickListener(quitClickListener); 

} 

從這一個活動片段

public class DemoActivity extends FragmentActivity { 
@Override 
protected void onCreate(Bundle savedInstanceState) {   
    super.onCreate(savedInstanceState); 

    /** Creating an Alert Dialog Window */ 
    AlertDemo alert = new AlertDemo(); 

    /** Opening the Alert Dialog Window */ 
    alert.show(getSupportFragmentManager(), "AlertDemo");  
} 

}

從這裏到創建alertbox活動

公共類AlertDemo擴展DialogFragment {

@Override 
public Dialog onCreateDialog(Bundle savedInstanceState) { 

    /** Turn Screen On and Unlock the keypad when this alert dialog is displayed */ 
    getActivity().getWindow().addFlags(LayoutParams.FLAG_TURN_SCREEN_ON | LayoutParams.FLAG_DISMISS_KEYGUARD); 


    /** Creating a alert dialog builder */ 
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 

    /** Setting title for the alert dialog */ 
    builder.setTitle("Alarm"); 

    /** Setting the content for the alert dialog */ 
    builder.setMessage("An Alarm by AlarmManager"); 

    /** Defining an OK button event listener */ 
    builder.setPositiveButton("OK", new OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      /** Exit application on click OK */ 
      getActivity().finish(); 
     }      
    }); 

    /** Creating the alert dialog window */ 
    return builder.create(); 
} 

/** The application should be exit, if the user presses the back button */ 
@Override 
public void onDestroy() {  
    super.onDestroy(); 
    getActivity().finish(); 
} 

我想，即使我重新啓動設備警報點進行invoken，有人請幫我整理出來

Answer 1

你必須使用中，你必須要BroadcastReceiver請檢查Intent.ACTION_BOOT_COMPLETED並重置Receiver中的警報操作。例如：

public class MyBootReceiver extends BroadcastReceiver{ 

    @Override 
    public void onReceive(Context context, Intent intent) { 

     if(intent.getAction().equalsIgnoreCase(Intent.ACTION_BOOT_COMPLETED)) { 
      //reset your alarm here 
     } 
    } 

} 

更新時間：

使用共享偏好您存儲數據，也可以使用數據庫了。我做了同樣的使用共享偏好，檢查下面的代碼：

public class MyBootReceiver extends BroadcastReceiver{ 

    @Override 
    public void onReceive(Context context, Intent intent) { 

     if(intent.getAction().equalsIgnoreCase(Intent.ACTION_BOOT_COMPLETED)) { 
      SharedPreferences mPreferences = context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE); 
      String datetime = mPreferences.getString("date", null); 
      if(!TextUtils.isEmpty(datetime)) { 
       Utility.setNotification(context);//set your alarm here. 

      } 
     } 
    } 

}