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Now that we have our editor we
can start saving our values.

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We learned in a previous video that
the on pause life cycle method

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is a good place to save
any unsaved changes.

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Let's make some space at
the bottom of our file and

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use the Ctrl+O shortcut to
override the on pause method.

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Then, we can store our string using
the putString method of our editor.

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It takes two parameters,
the key and the value.

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Let's type mEditor.putString and

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I'll call my key KEY_EDITTEXT.

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And for the value,
we'll do mEditText.getText,

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which returns an editable.

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Then .toString, to make it a string.

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Then we can use Alt+Enter
on the key to create it.

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I'll name mine similar to the variable,
key_edittext.

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Now that we've saved our
string to the editor,

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we just need to add mEditor.apply

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to save our changes to our
shared preferences object.

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We've now saved the value of our
edit text in the on pause method.

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All that's left is to retrieve that
value in the on create method and

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set the text of our edit
text to that value.

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We can retrieve the value by
using the get string method

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on a shared preference object.

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When retrieving a value from a shared
preference we need to provide the key for

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the value and a default value to
use in case that key isn't found.

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In the bottom of our on create,
let's retrieve our string by calling

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MSharedPreferences.getString and

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passing in our KEY_EDITTEXT string for

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the key parameter and
an empty string for the default value.

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Next, let's save this value into
a string called editTextString.

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Lastly, let's update our edit
text by typing mEditText.setText.

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And we'll set it to editTextString.

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The last step is to test the app
to make sure it works as expected.

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I'll type in some text.

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And close the app by
hitting the back button.

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And when we reopen the app,
our text is still here, perfect.

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Before we go on, let's talk about
removing shared preference values.

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This is especially useful for

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testing, or if your users want to
reset an app to it's default values.

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This can be done by using the clear method
of a shared preference editor object.

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Also, we can use the remove method, and
pass in a key, to remove just one value.

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Once you're done removing values,

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don't forget to use the apply
method to save your changes.

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Shared preferences is the easiest
way to store data in Android, but

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only if that data can easily
fit into a key value pair.

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If you're interested in how to store
more complicated data, like a picture or

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a Java file, please check out our
videos on data persistence in Android,

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which are linked in the teacher's notes.

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They also cover shared preferences
in a little more detail.

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For now, we're going to move
onto a practice project

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to test everything that you've learned so
far.