android 限制某個操作每天只能操作指定的次數(示例程式碼詳解)
阿新 • • 發佈:2020-06-11
最近有個需求,要求啟動頁的攔截頁每天只能顯示3次,超過三次就顯示別的頁面,然後到第二天才可以再次顯示,利用SharePreferences儲存天數和每天的次數,大概是思路是:判斷 如果是同一天,就去拿儲存的次數,當次數小於3才執彈出攔截頁,然後,每次彈出,次數就加1,並且儲存次數和當天的時間;如果不是同一天,就把次數賦值為1,並且把當天賦值給最後訪問的時間,然後儲存當前的次數。具體實現如下:
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,"lastDay"); Log.i(TAG,"onClick-----: "+"today:"+today); Log.i(TAG,"onClick-----: "+"lastDay:"+lastDay); Log.i(TAG,"onClick-----: "+"frequency:"+frequency); if(today != lastDay) { //TODO執行攔截頁操作; //修改SharePreferences日期為當前日期,並記錄次數一次; frequency = 1; Log.i(TAG,"onClick-----: "+"不是同一天執行次數"+frequency); //把today賦值給lastDay 讓today == lastDay SharePreferencesUtils.putIntValue(TwoActivity.this,"lastDay",today); SharePreferencesUtils.putIntValue(TwoActivity.this,"frequency",frequency); }else if(today == lastDay){ if(frequency < 3) { //TODO執行攔截頁操作; Log.i(TAG,"onClick-----: "+"同一天執行次數"+frequency); frequency++; SharePreferencesUtils.putIntValue(TwoActivity.this,lastDay); SharePreferencesUtils.putIntValue(TwoActivity.this,frequency); }else { //TODO執行別的操作 Log.i(TAG,"onClick-----: "+"超過三次"); } } } }); } }
SharePreferencesUtils程式碼如下:
/*
* 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,fileName).getInt(key,0); } public static boolean getBooleanValue(Context context,fileName).getBoolean(key,false); } public static void putBooleanValue(Context context,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 value) { Editor editor = getSharePreferences(context,fileName).edit(); editor.putString(key,value); editor.commit(); editor.clear(); editor = null; } public static void putIntValue(Context context,int value) { Editor editor = getSharePreferences(context,fileName).edit(); editor.putInt(key,value); editor.commit(); editor.clear(); editor = null; } public static void putMapStringValue(Context context,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,Integer> editorValue) { Editor editor = getSharePreferences(context,Integer> entry : editorValue.entrySet()) { String key = entry.getKey(); Integer value = entry.getValue(); editor.putInt(key,value); } editor.commit(); editorValue.clear(); editorValue = null; } }
總結
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