Android Studio - How Can I Let Switch Be Checked After Restarting The App

I only have a switch toggle on my fragment. What is the app doing now: The user opens the app and selects 'Laptop' over the navigation drawer and then he sees a switch (it is a 'sl

Solution 1:

you should use SharedPreferences like so:

publicstaticfinalStringSWITCH_PREFS="Switcher";
    @OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.your_layout);

        Switchswitcher= (Switch)findViewById(R.id.yourSwitchId);
        switcher.setOnCheckedChangeListener(newCompoundButton.OnCheckedChangeListener() {
            @OverridepublicvoidonCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                SharedPreferences.Editoreditor= PreferenceManager.getDefaultSharedPreferences(yourContext).edit();
                editor.putBoolean(SWITCH_PREFS,isChecked);
                editor.commit();
            }
        });
        SharedPreferencesprefs= PreferenceManager.getDefaultSharedPreferences(yourContext);
        if(prefs.contains(SWITCH_PREFS) && switcher != null)
        {
            switcher.setChecked(prefs.getBoolean(SWITCH_PREFS,false));
        }

    }

Didn't try this code, but hope this works.