android判断用户是否已登陆详细代码

package com.sanyue.jianzhicompany;import java.lang.ref.WeakReference;import org.android.agoo.client.BaseRegistrar;import org.apache.http.Header;import org.json.JSONException;import org.json.JSONObject;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Message;import com.loopj.android.http.JsonHttpResponseHandler;import com.sanyue.jianzhicompany.convert.UserJSONConvert;import com.sanyue.jianzhicompany.db.Preferences;import com.sanyue.jianzhicompany.http.AsyncHttpResponseHandler;import com.sanyue.jianzhicompany.http.RequestParams;import com.sanyue.jianzhicompany.http.RestClient;import com.sanyue.jianzhicompany.model.User;import com.sanyue.jianzhicompany.utils.Constant;import com.sanyue.jianzhicompany.utils.ToastUtil;import com.umeng.message.PushAgent;import com.umeng.message.UmengRegistrar;/* * * 判断是否登陆 * 是：更新登陆信息 * 否：转到登陆界面登陆 * * */public class SplashActivity extends Activity {    private static final long DELAY_MILLIS = 1 * 1000;    private static final int MSG_WHAT_STARTMAIN = 1;    public static String device_token;    private Handler mHandler;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        PushAgent mPushAgent = PushAgent.getInstance(SplashActivity.this);        device_token = BaseRegistrar.getRegistrationId(SplashActivity.this); //通过“友盟”获取设备信息        PushAgent.getInstance(SplashActivity.this).onAppStart();        mPushAgent.enable();        Preferences.setDeviceToken(device_token);        setContentView(R.layout.activity_splash);        mHandler = new MyHandler(this);        mHandler.sendEmptyMessageDelayed(MSG_WHAT_STARTMAIN, DELAY_MILLIS);        if (Preferences.isLogin()) {//          更新登陆信息            getMyInfo();        }    }    private static class MyHandler extends Handler {        WeakReference<SplashActivity> mActivity;        MyHandler(SplashActivity activity) {            mActivity = new WeakReference<SplashActivity>(activity);        }        @Override        public void handleMessage(Message msg) {            SplashActivity theActivity = mActivity.get();            if (theActivity != null) {                switch (msg.what) {                case MSG_WHAT_STARTMAIN:                    if (Preferences.isLogin()) {//                      更新版本信息                        Preferences.updateVersionCode();                        theActivity.startActivity(new Intent(theActivity,                                MainActivity.class));                    } else {                        theActivity.startActivity(new Intent(theActivity,                                LoginActivity.class));                        Preferences.updateVersionCode();                    }                    theActivity.finish();                    break;                }            }        }    }    private void getMyInfo() {        RequestParams params = new RequestParams();        int id = Preferences.getAccountId();        String token = Preferences.getToken();        params.put("user_id", id);        params.put("version", 1.0);        params.put("app_name","android_jianzhi" );        params.put("platform", "android_jianzhi");        params.put("token", token);        RestClient.post(Constant.API_GET_COMPANY_INFO, params, new AsyncHttpResponseHandler(getApplicationContext(), new JsonHttpResponseHandler(){            @Override            public void onSuccess(int statusCode, Header[] headers,                    JSONObject response) {                // TODO Auto-generated method stub                super.onSuccess(statusCode, headers, response);                try {                    if (response.getInt("msg_code") == Constant.CODE_SUCCESS) {                        User user = UserJSONConvert.convertJsonToItem(response.getJSONObject("data"));                        ToastUtil.make(SplashActivity.this).show(""+user);                        Preferences.updateAccountUser(user);                    } else {                        ToastUtil.make(SplashActivity.this).show(response.getInt("msg"));                    }                } catch (JSONException e) {                    e.printStackTrace();                }            }        }));    }}

Preference类：

import org.json.JSONObject;import com.sanyue.jianzhicompany.model.User;import android.content.Context;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;import android.content.pm.PackageInfo;import android.content.pm.PackageManager.NameNotFoundException;import android.preference.PreferenceManager;import android.telephony.TelephonyManager;public final class Preferences {    public static SharedPreferences sSHARED_REFERENCES = null;    private static Context sAPPLICATION_CONTEXT;    private static String sDEVICE_ID;    private static String sVERSION_NAME;    private static int sUSER_ID = -1;// 说明没有初始化    public Preferences() {    }    public static boolean isLogin() {        return getAccountId() > 0 ? true : false;    }    public static boolean isShowWelcome() {        try {            PackageInfo info = sAPPLICATION_CONTEXT.getPackageManager()                    .getPackageInfo(sAPPLICATION_CONTEXT.getPackageName(), 0);            // 当前版本的版本号            int versionCode = info.versionCode;            int saveVersionCode = sSHARED_REFERENCES.getInt("version_code", 0);            return versionCode != saveVersionCode;        } catch (NameNotFoundException e) {            return true;        }    }    public static boolean updateVersionCode() {        try {            PackageInfo info = sAPPLICATION_CONTEXT.getPackageManager()                    .getPackageInfo(sAPPLICATION_CONTEXT.getPackageName(), 0);            // 当前版本的版本号            int versionCode = info.versionCode;            Editor editor = sSHARED_REFERENCES.edit();            editor.putInt("version_code", versionCode);            return editor.commit();        } catch (NameNotFoundException e) {            return false;        }    }    public static void init(Context context) {        if (sSHARED_REFERENCES == null) {            sAPPLICATION_CONTEXT = context.getApplicationContext();            sSHARED_REFERENCES = PreferenceManager                    .getDefaultSharedPreferences(sAPPLICATION_CONTEXT);        }    }    public static SharedPreferences getSharedPreferences() {        return sSHARED_REFERENCES;    }    public static String getDeviceId() {        if (sDEVICE_ID == null) {            sDEVICE_ID = ((TelephonyManager) sAPPLICATION_CONTEXT.getSystemService(Context.TELEPHONY_SERVICE)).getDeviceId();        }        return sDEVICE_ID;    }    public static String getVersionName() {        if (sVERSION_NAME == null) {            try {                PackageInfo info = sAPPLICATION_CONTEXT.getPackageManager()                        .getPackageInfo(sAPPLICATION_CONTEXT.getPackageName(),                                0);                // 当前应用的版本名称                sVERSION_NAME = info.versionName;                // 当前版本的版本号                // int versionCode = info.versionCode;                // 当前版本的包名                // String packageNames = info.packageName;            } catch (NameNotFoundException e) {            }        }        return sVERSION_NAME;    }    /** * 获取当前登录的用户 * * @return 如果已经登录返回User，否则返回null */    public static User getAccountUser() {        User user = new User();        sUSER_ID = sSHARED_REFERENCES.getInt("user_id", 0);        if (sUSER_ID == 0) {            return null;        }        JSONObject jsonObject;        // jsonObject = new JSONObject(sSHARED_REFERENCES.getString(        // "user_json", null));            user.setToken(sSHARED_REFERENCES.getString("access_token", null));            user.setUserId(sSHARED_REFERENCES.getInt("user_id", 0));            user.setBindName(sSHARED_REFERENCES.getString("bind_name", null));            return user;    }    public static boolean setAccountUser(User user, String accessToken) {        Editor editor = sSHARED_REFERENCES.edit();        editor.putString("access_token", accessToken);        editor.putInt("user_id", user.getUserId());// editor.putString("user_json", user.toJSON().toString());        // TODO json format save        if (editor.commit()) {            sUSER_ID = user.getUserId();            return true;        }        return false;    }    public static boolean setDeviceToken(String device_token){        Editor editor = sSHARED_REFERENCES.edit();        editor.putString("device_token", device_token);        if(editor.commit()){            return true;        }        return false;    }    public static String getDeviceToken(){        String device_token = sSHARED_REFERENCES.getString("device_token", null);        return device_token;    }    public static boolean userClear() {        Editor editor = sSHARED_REFERENCES.edit();        editor.putString("access_token", "");        editor.putInt("user_id", 0);        editor.putString("create_time", "");        // TODO json format save        if (editor.commit()) {            sUSER_ID = 0;            return true;        }        return false;    }    public static boolean updateAccountUser(User user) {        Editor editor = sSHARED_REFERENCES.edit();        editor.putInt("user_id", user.getUserId());        editor.putString("user_json", user.toJSON().toString());        if (editor.commit()) {            sUSER_ID = user.getUserId();            return true;        }        return false;    }    /** * 获取登录用户的ID * * @return 如果已登录返回用户ID，否则返回0 */    public static int getAccountId() {        if (sUSER_ID == -1) {            sUSER_ID = sSHARED_REFERENCES.getInt("user_id", 0);        }        return sUSER_ID;    }    public static String getToken() {        return sSHARED_REFERENCES.getString("access_token", null);    }}

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