我试图在用户第5次登录应用时显示“评价我们”对话框。在注册时,共享首选项LOG_COUNT
设置为0,另一个共享首选项LOG_BOOLEAN
的值设置为true。
当用户第一次登录时,我会检查LOG_BOOLEAN
的值是否为真。如果是,则LOG_BOOLEAN
设置为false
。每次用户登录时,共享首选项LOG_COUNT
的值都会增加。如果它是5,那么我显示要求评级的对话框,如果用户没有给应用评分,则将其设置回0。
但每次用户登录时,LOG_BOOLEAN
为true
且LOG_COUNT
为0,但我将其设置为false
并在首次登录时递增。
我使用类SessionManager
来存储和更改共享偏好。
这是SessionManager.java:
package com.prematixsofs.taxiapp;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import java.util.HashMap;
/**
* Created by admin on 05-01-2016.
*/
public class SessionManager {
SharedPreferences pref;
String userName;
Editor editor;
Context _context;
int PRIVATE_MODE = 0;
int loginCount;
private static final String PREF_NAME = "TaxiPref";
private static String LOGIN_BOOLEAN = "loginBoolean";
private static String IS_LOGIN = "IsLoggedIn";
private static String LOG_COUNT = "loginCount";
// Email address (make variable public to access from outside)
public static final String KEY_EMAIL = "email";
public static final String KEY_NAME = "name";
// Constructor
public SessionManager(Context context) {
this._context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
public void createLoginSession(String name, String email) {
// Storing login value as TRUE
// Storing email in pref
editor.putString(KEY_NAME, name);
editor.putString(KEY_EMAIL, email);
editor.putBoolean(IS_LOGIN, true);
// commit changes
editor.commit();
}
public void setLoginCount(int count) {
if (count == 0) {
editor.putInt(LOG_COUNT, count);
editor.commit();
} else {
loginCount = pref.getInt(LOG_COUNT, 10);
editor.putInt(LOG_COUNT, loginCount + 1);
editor.commit();
}
}
public int getLoginCount() {
return pref.getInt(LOG_COUNT, 11);//random default value
}
public void setLoginSessionToTrue() {
editor.putInt(LOG_COUNT, 0);
editor.commit();
editor.putBoolean(LOGIN_BOOLEAN, true);
editor.commit();
}
public boolean getLoginBoolean() {
boolean bool;
bool = pref.getBoolean(LOGIN_BOOLEAN, true);
return bool;
}
public void setLoginBooleanToFalse() {
editor.putBoolean(LOGIN_BOOLEAN, false);
editor.putInt(LOG_COUNT, 0);
editor.commit();
boolean set = pref.getBoolean(LOGIN_BOOLEAN, false);
int cou = pref.getInt(LOG_COUNT, 100);
}
/**
* Check login method wil check user login status
* If false it will redirect user to login page
* Else won't do anything
*/
public void checkLogin() {
// Check login status
if (!this.isLoggedIn()) {
// user is not logged in redirect him to Login Activity
Intent i = new Intent(_context, LoginActivity.class);
// Closing all the Activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
// Add new Flag to start new Activity
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// Staring Login Activity
_context.startActivity(i);
}
}
/**
* Get stored session data
*/
public String getUserName() {
HashMap<String, String> user = new HashMap<String, String>();
// user email id
return pref.getString(KEY_NAME, null);
}
public String getUserEmail() {
return pref.getString(KEY_EMAIL, null);
}
/**
* Clear session details
*/
public void logoutUser() {
// Clearing all data from Shared Preferences
editor.clear();
editor.commit();
// After logout redirect user to Loing Activity
Intent i = new Intent(_context, MainActivity.class);
// Closing all the Activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
// Add new Flag to start new Activity
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// Staring Login Activity
_context.startActivity(i);
}
/**
* Quick check for login
* *
*/
// Get Login State
public boolean isLoggedIn() {
return pref.getBoolean(IS_LOGIN, false);
}
}
这是登录:
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//databaseHelper.delete();
item = databaseHelper.getLogin(uname.getText().toString(), pass.getText().toString());
if (item) {
sessionManager.createLoginSession(databaseHelper.getUserName(uname.getText().toString()), uname.getText().toString());
int c = sessionManager.getLoginCount(); // the value here is 11,the random default value.not the incremented value
countCheck = sessionManager.getLoginBoolean();
if (countCheck) { //check if first time log in
sessionManager.setLoginBooleanToFalse();
uname.setText("");
pass.setText("");
sessionManager.setLoginCount(0);
Intent intent2 = new Intent(getApplicationContext(), DateVehiclePicker.class);
startActivity(intent2);
} else if (sessionManager.getLoginCount() == 5) {
Intent intent1 = new Intent(getApplicationContext(), DateVehiclePicker.class);
sessionManager.setLoginCount(0);
intent1.putExtra("login", true);
startActivity(intent1);
}
} else
uname.setError("Enter a valid Email & Password");
}
});
这是Register.java,我将sharedpreference设置为true并将LOG_COUNT
指定为零:
signup.setOnClickListener(new View.OnClickListener() {
sessionManager.setLoginSessionToTrue();
});
答案 0 :(得分:1)
试试这个
private SharedPreferences.Editor getEditor() {
SharedPreferences settings = mContext.getSharedPreferences(GENERAL_PREFERENCE, 0);
return settings.edit();
}
然后
public void setUserId(String userId) {
this.userId = userId;
getEditor().putString(userIdKey, userId).commit();
}
你应该创建默认初始化
private void initSharedPreference() {
SharedPreferences settings = mContext.getSharedPreferences(GENERAL_PREFERENCE, 0);
userId = settings.getString(userIdKey, ""); // to avoid nullpointerexception
}
在您的SharedPref构造函数中调用此方法
修改强>
像这样创建SharedPref:
public class SharedPref {
private Context mContext;
private String userId;
private final static String GENERAL_PREFERENCE = "general_pref";
private String userIdKey = "userIdKey";
public SharedPref(Context context) {
this.mContext = context;
initSharedPreference();
}
private void initSharedPreference() {
SharedPreferences settings = mContext.getSharedPreferences(GENERAL_PREFERENCE, 0);
userId = settings.getString(userIdKey, "");
}
private SharedPreferences.Editor getEditor() {
SharedPreferences settings = mContext.getSharedPreferences(GENERAL_PREFERENCE, 0);
return settings.edit();
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
getEditor().putString(userIdKey, userId).commit();
}
}
创建处理程序类时:
public class DataSourceController {
public SharedPref sharedPref;
private static DataSourceController sInstance;
private DataSourceController(Context context) {
sharedPref = new SharedPref(context);
}
public static synchronized DataSourceController getInstance() {
return sInstance;
}
public static DataSourceController initSingleton(Context context) {
if (sInstance == null) {
sInstance = new DataSourceController(context);
}
return sInstance;
}
public static SharedPref getSharedPreference() {
return getInstance().sharedPref;
}
}
在Application类中初始化此处理程序类,如下所示:
public class App extends Application {
@Override
public void onCreate() {
super.onCreate();
DataSourceController.initSingleton(this);
}
}
现在您可以从应用的任何位置拨打DataSourceController.getSharedPreference().getUserId();
和DataSourceController.getSharedPreference().setUserId("id");
。