There are two ways to manage sessions in android Applications.
1. Global Variable.
2. Shared Preference.<\/p>\n\n\n\n
Both will work but there is a problem with Global variable i.e Global variable got destroyed, once your application is closed.
For this problem only, Shared Preference is introduced, its value persist even if you close your application. Shared Preference is a key value pair.
Below you can see how to use Shared Preference step by step.<\/p>\n\n\n\n
1. Initialization
To add value to your Shared Preference object you need to edit its object with an editor.<\/p>\n\n\n\n
SharedPreferences shared = getApplicationContext().getSharedPreferences(\"YourSessionName\", MODE_PRIVATE);\nEditor editor = shared.edit();<\/pre>\n\n\n\n2. Set Data
You can set any type of data using provided following functions.<\/p>\n\n\n\neditor.putBoolean(\"key\", true); \/\/ Storing boolean - true\/false\neditor.putString(\"key\", \"value\"); \/\/ Storing string value\neditor.putInt(\"key\", \"value\"); \/\/ Storing integer value\neditor.putFloat(\"key\", \"value\"); \/\/ Storing float value\neditor.putLong(\"key\", \"value\"); \/\/ Storing long value \neditor.commit(); \/\/ commit changes<\/pre>\n\n\n\n3. Get Data
You can get data in the same way as you set it, without use of editor.<\/p>\n\n\n\nSharedPreferences shared = getSharedPreferences(\"YourSessionName\", MODE_PRIVATE);\nBoolean variable = (shared.getBoolean(\"key\",false));\nString variable = shared.getString(\"key\", \"\");\nInt variable = shared.getInt(\"key\",0);\nFloat variable = shared.getFloat(\"key\", 0.0);\nLong variable = shared.getLong(\"key\", 0);<\/pre>\n\n\n\nthe second parameter is the default value that it will return if the key won’t exist.<\/p>\n\n\n\n
4. Edit Shared Preference
you can clear the whole SharedPreference object at once or remove single key value pair.<\/p>\n\n\n\nSharedPreferences shared = getSharedPreferences(\"YourSessionName\", MODE_PRIVATE);\neditor = shared.edit();\neditor.remove(\"name\"); \/\/ will delete key name \neditor.commit(); \/\/ commit changes\n\nTo empty SharedPreference object at once\neditor.clear();\neditor.commit(); \/\/ commit changes<\/pre>\n","protected":false},"excerpt":{"rendered":"