android 限制某个操作每天只能操作指定的次数(示例代码详解)

最近有个需求，要求启动页的拦截页每天只能显示3次，超过三次就显示别的页面，然后到第二天才可以再次显示，利用sharepreferences保存天数和每天的次数，大概是思路是：判断 如果是同一天，就去拿保存的次数，当次数小于3才执弹出拦截页，然后，每次弹出，次数就加1,并且保存次数和当天的时间；如果不是同一天，就把次数赋值为1，并且把当天赋值给最后访问的时间，然后保存当前的次数。具体实现如下：

package com.example.demo1.test;
 
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.util.log;
import android.view.view;
 
import com.example.demo1.r;
 
import java.util.calendar;
 
public class twoactivity extends appcompatactivity {
 private static final string tag = "twoactivity";
 
 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_two);
 findviewbyid(r.id.test).setonclicklistener(new view.onclicklistener() {
  @override
  public void onclick(view view) {
 
  int frequency = sharepreferencesutils.getintvalue(twoactivity.this,"time_and_frequency","frequency");
  int today = calendar.getinstance().get(calendar.day_of_year);
  int lastday = sharepreferencesutils.getintvalue(twoactivity.this,"time_and_frequency","lastday");
  log.i(tag, "onclick-----: "+"today:"+today);
  log.i(tag, "onclick-----: "+"lastday:"+lastday);
  log.i(tag, "onclick-----: "+"frequency:"+frequency);
  if(today != lastday)
  {
   //todo执行拦截页操作；
 
   //修改sharepreferences日期为当前日期，并记录次数一次；
   frequency = 1;
   log.i(tag, "onclick-----: "+"不是同一天执行次数"+frequency);
   //把today赋值给lastday 让today == lastday
   sharepreferencesutils.putintvalue(twoactivity.this,"time_and_frequency","lastday",today);
   sharepreferencesutils.putintvalue(twoactivity.this,"time_and_frequency","frequency",frequency);
  }else if(today == lastday){
   if(frequency < 3) {
   //todo执行拦截页操作；
   log.i(tag, "onclick-----: "+"同一天执行次数"+frequency);
   frequency++;
   sharepreferencesutils.putintvalue(twoactivity.this,"time_and_frequency","lastday",lastday);
    sharepreferencesutils.putintvalue(twoactivity.this,"time_and_frequency","frequency",frequency);
   }else {
   //todo执行别的操作
   log.i(tag, "onclick-----: "+"超过三次");
   }
  }
  }
 });
 }
}

sharepreferencesutils代码如下：

/*
 * copyright (c) 2017- waitfun inc. all rights reserved.
 */

package com.example.demo1.test;
import android.app.activity;
import android.content.context;
import android.content.sharedpreferences;
import android.content.sharedpreferences.editor;
import java.util.map;
public class sharepreferencesutils {
 private final static string tag = sharepreferencesutils.class.getname();
 private final static sharedpreferences getsharepreferences(context context, string filename) {
 return context.getsharedpreferences(filename, activity.mode_private);
 }
 public static string getstrvalue(context context, string filename, string key) {
 return getsharepreferences(context, filename).getstring(key, "");
 }
 public static int getintvalue(context context, string filename, string key) {
 return getsharepreferences(context, filename).getint(key, 0);
 }
 public static boolean getbooleanvalue(context context, string filename, string key) {
 return getsharepreferences(context, filename).getboolean(key, false);
 }
 public static void putbooleanvalue(context context, string filename, string key, boolean value) {
 editor editor = getsharepreferences(context, filename).edit();
 editor.putboolean(key, value);
 editor.commit();
 editor.clear();
 editor = null;
 }
 public static void putstringvalue(context context, string filename, string key, string value) {
 editor editor = getsharepreferences(context, filename).edit();
 editor.putstring(key, value);
 editor.commit();
 editor.clear();
 editor = null;
 }
 public static void putintvalue(context context, string filename, string key, int value) {
 editor editor = getsharepreferences(context, filename).edit();
 editor.putint(key, value);
 editor.commit();
 editor.clear();
 editor = null;
 }
 public static void putmapstringvalue(context context, string filename, map<string, string> editorvalue) {
 editor editor = getsharepreferences(context, filename).edit();
 for (map.entry<string, string> entry : editorvalue.entryset()) {
  string key = entry.getkey();
  string value = entry.getvalue();
  editor.putstring(key, value);
 }
 editor.commit();
 editorvalue.clear();
 editorvalue = null;
 }
 public static void putmapintegervalue(context context, string filename, map<string, integer> editorvalue) {
 editor editor = getsharepreferences(context, filename).edit();
 for (map.entry<string, integer> entry : editorvalue.entryset()) {
  string key = entry.getkey();
  integer value = entry.getvalue();
  editor.putint(key, value);
 }
 editor.commit();
 editorvalue.clear();
 editorvalue = null;
 }
}

总结

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