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;
}
}
