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   源码介绍

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转载的源码可直接运行，仅用于学习

public String getCurrentWeekday() {
  int mondayPlus = this.getMondayPlus();
  GregorianCalendar currentDate = new GregorianCalendar();
  currentDate.add(GregorianCalendar.DATE, mondayPlus 6);
  Date monday = currentDate.getTime();
 
  String preMonday = format(monday,0);
  weekEnd = format(monday,DATE_MOTH_DAY);
  return preMonday;
 }
 
 public String getMondayOFWeek(){
  int mondayPlus = this.getMondayPlus();
  GregorianCalendar currentDate = new GregorianCalendar();
  currentDate.add(GregorianCalendar.DATE, mondayPlus);
  Date monday = currentDate.getTime();
 
  String preMonday = format(monday,0);
  weekStart = format(monday,DATE_MOTH_DAY);
  return preMonday;
 }
 
 
 public String getDefaultDay(){
  String str = "";
  Calendar lastDate = Calendar.getInstance();
  lastDate.set(Calendar.DATE,1);
  lastDate.add(Calendar.MONTH,1);
  lastDate.add(Calendar.DATE,-1);
  str=format(lastDate.getTime(),DATE_DAY);
  return str;
 }
 
 private String format(Date date,int id){
  String str = "";
  SimpleDateFormat ymd = null;
  switch (id) {
  case DATE_MOTH_DAY:
   ymd = new SimpleDateFormat("MM月dd日");
   break;
  case DATE_DAY:
   ymd = new SimpleDateFormat("dd");
   break;
  default:
   ymd = new SimpleDateFormat("yyyy-MM-dd");
   break;
  }
  str = ymd.format(date);
  return str;
 }
 
 public void onBackPressed() {
  new AlertDialog.Builder(this).setTitle(getString(R.string.point))
  .setMessage(getString(R.string.exit_message))
  .setPositiveButton(getString(R.string.exit_ok), new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface arg0, int arg1) {
    // TODO Auto-generated method stub
    db.close();
    finish();
          android.os.Process.killProcess(android.os.Process.myPid());
   }
  }).setNegativeButton(getString(R.string.exit_cancle), new DialogInterface.OnClickListener() {
  @Override
  public void onClick(DialogInterface arg0, int arg1) {
   // TODO Auto-generated method stub
   
  }
  }).show();
 }