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：
packagecom.example.demo1.test;
importandroid.support.v7.app.AppCompatActivity;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.View;
importcom.example.demo1.R;
importjava.util.Calendar;
publicclassTwoActivityextendsAppCompatActivity{
privatestaticfinalStringTAG="TwoActivity";
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_two);
findViewById(R.id.test).setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
intfrequency=SharePreferencesUtils.getIntValue(TwoActivity.this,"time_and_frequency","frequency");
inttoday=Calendar.getInstance().get(Calendar.DAY_OF_YEAR);
intlastDay=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);
}elseif(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-WaitFunInc.AllRightsReserved.
*/
packagecom.example.demo1.test;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.content.SharedPreferences;
importandroid.content.SharedPreferences.Editor;
importjava.util.Map;
publicclassSharePreferencesUtils{
privatefinalstaticStringTAG=SharePreferencesUtils.class.getName();
privatefinalstaticSharedPreferencesgetSharePreferences(Contextcontext,StringfileName){
returncontext.getSharedPreferences(fileName,Activity.MODE_PRIVATE);
}
publicstaticStringgetStrValue(Contextcontext,StringfileName,Stringkey){
returngetSharePreferences(context,fileName).getString(key,"");
}
publicstaticintgetIntValue(Contextcontext,StringfileName,Stringkey){
returngetSharePreferences(context,fileName).getInt(key,0);
}
publicstaticbooleangetBooleanValue(Contextcontext,StringfileName,Stringkey){
returngetSharePreferences(context,fileName).getBoolean(key,false);
}
publicstaticvoidputBooleanValue(Contextcontext,StringfileName,Stringkey,booleanvalue){
Editoreditor=getSharePreferences(context,fileName).edit();
editor.putBoolean(key,value);
editor.commit();
editor.clear();
editor=null;
}
publicstaticvoidputStringValue(Contextcontext,StringfileName,Stringkey,Stringvalue){
Editoreditor=getSharePreferences(context,fileName).edit();
editor.putString(key,value);
editor.commit();
editor.clear();
editor=null;
}
publicstaticvoidputIntValue(Contextcontext,StringfileName,Stringkey,intvalue){
Editoreditor=getSharePreferences(context,fileName).edit();
editor.putInt(key,value);
editor.commit();
editor.clear();
editor=null;
}
publicstaticvoidputMapStringValue(Contextcontext,StringfileName,MapeditorValue){
Editoreditor=getSharePreferences(context,fileName).edit();
for(Map.Entryentry:editorValue.entrySet()){
Stringkey=entry.getKey();
Stringvalue=entry.getValue();
editor.putString(key,value);
}
editor.commit();
editorValue.clear();
editorValue=null;
}
publicstaticvoidputMapIntegerValue(Contextcontext,StringfileName,MapeditorValue){
Editoreditor=getSharePreferences(context,fileName).edit();
for(Map.Entryentry:editorValue.entrySet()){
Stringkey=entry.getKey();
Integervalue=entry.getValue();
editor.putInt(key,value);
}
editor.commit();
editorValue.clear();
editorValue=null;
}
}
总结
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