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saveinstancestate on rotation #7

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saveinstancestate on rotation #7

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56 changes: 38 additions & 18 deletions app/src/main/java/bottomnav/hitherejoe/com/bottomnavigationsample/MainActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,8 @@ public class MainActivity extends AppCompatActivity {
private TextView textFavorites;
private TextView textSchedules;
private TextView textMusic;
private int selected_menu=1;
private static String KEY_SELECTED_MENU="KEY_SELECTED_MENU";

@Override
protected void onCreate(Bundle savedInstanceState) {
Expand All @@ -26,29 +28,47 @@ protected void onCreate(Bundle savedInstanceState) {
BottomNavigationView bottomNavigationView = (BottomNavigationView)
findViewById(R.id.bottom_navigation);

if (savedInstanceState != null) {
int selected_menu_id= savedInstanceState.getInt(KEY_SELECTED_MENU);
handleMenu(selected_menu_id);
}

bottomNavigationView.setOnNavigationItemSelectedListener(
new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.action_favorites:
textFavorites.setVisibility(View.VISIBLE);
textSchedules.setVisibility(View.GONE);
textMusic.setVisibility(View.GONE);
break;
case R.id.action_schedules:
textFavorites.setVisibility(View.GONE);
textSchedules.setVisibility(View.VISIBLE);
textMusic.setVisibility(View.GONE);
break;
case R.id.action_music:
textFavorites.setVisibility(View.GONE);
textSchedules.setVisibility(View.GONE);
textMusic.setVisibility(View.VISIBLE);
break;
}
return false;
return handleMenu(item.getItemId());
}
});
}

private boolean handleMenu(int sel_item) {
switch (sel_item) {
case R.id.action_favorites:
selected_menu=R.id.action_favorites;
textFavorites.setVisibility(View.VISIBLE);
textSchedules.setVisibility(View.GONE);
textMusic.setVisibility(View.GONE);
break;
case R.id.action_schedules:
selected_menu=R.id.action_schedules;
textFavorites.setVisibility(View.GONE);
textSchedules.setVisibility(View.VISIBLE);
textMusic.setVisibility(View.GONE);
break;
case R.id.action_music:
selected_menu=R.id.action_music;
textFavorites.setVisibility(View.GONE);
textSchedules.setVisibility(View.GONE);
textMusic.setVisibility(View.VISIBLE);
break;
}
return false;
}

@Override
protected void onSaveInstanceState (Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(KEY_SELECTED_MENU, selected_menu);
}
}