fr.cph.stock.android.StockTrackerApp.java Source code

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Here is the source code for fr.cph.stock.android.StockTrackerApp.java

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/**
 * Copyright 2013 Carl-Philipp Harmant
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package fr.cph.stock.android;

import org.json.JSONObject;

import fr.cph.stock.android.activity.BaseActivity;
import fr.cph.stock.android.activity.ErrorActivity;
import fr.cph.stock.android.activity.LoginActivity;
import android.app.Activity;
import android.app.Application;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.widget.Toast;

/**
 * This class extends Application. It defines some functions that will be available anywhere within the app
 * 
 * @author Carl-Philipp Harmant
 * 
 */
public class StockTrackerApp extends Application {

    /**
     * This function logout the user and removes its login/password from the preferences. It also loads the login activity
     * 
     * @param activity
     *            the activity to finish
     */
    public void logOut(Activity activity) {
        SharedPreferences settings = getSharedPreferences(BaseActivity.PREFS_NAME, 0);
        String login = settings.getString("login", null);
        String password = settings.getString("password", null);
        if (login != null) {
            settings.edit().remove("login").commit();
        }
        if (password != null) {
            settings.edit().remove("password").commit();
        }
        activity.setResult(100);
        activity.finish();
        Intent intent = new Intent(this, LoginActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
    }

    /**
     * Check if a session is valid or not
     * 
     * @param jsonObject
     *            the json session object to check
     * @return true or false
     */
    public boolean isSessionError(JSONObject jsonObject) {
        boolean result = false;
        String error = jsonObject.optString("error");
        if (error.equals("No active session") || error.equals("User session not found")) {
            result = true;
        }
        return result;
    }

    /**
     * This function loads the error activity to the screen. It happens usually when the session is timeout and needs to request a
     * new session id to the server
     * 
     * @param currentActivity
     *            the activity to stop
     * @param jsonObject
     *            the json object containing the error message
     */
    public void loadErrorActivity(Activity currentActivity, JSONObject jsonObject) {
        Intent intent = new Intent(this, ErrorActivity.class);
        intent.putExtra("data", jsonObject.toString());
        SharedPreferences settings = getSharedPreferences(BaseActivity.PREFS_NAME, 0);
        String login = settings.getString("login", null);
        String password = settings.getString("password", null);
        intent.putExtra("login", login);
        intent.putExtra("password", password);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
        currentActivity.finish();
    }

    /**
     * This function toast a toast "updated" message to the screen
     */
    public void toast() {
        Context context = getApplicationContext();
        CharSequence text = "Updated !";
        int duration = Toast.LENGTH_LONG;
        Toast toast = Toast.makeText(context, text, duration);
        toast.show();
    }
}