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我從斯坦休伯特一個BottomNavigation酒吧在我的應用程序：https://github.com/aurelhubert/ahbottomnavigation如何加載一次我的片段，並保存其狀態
我有三個標籤，問題是第二個片段是如此之大，它會打開延遲2秒，這導致底部條的動畫顛簸。所以我認爲一次加載片段一次並保存它的狀態會很有用。
我該怎麼做？ （我是新來的Android工作室）
這裏是我的代碼：我activity_main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.aaron.waller.mrpolitik.MainActivity"
android:id="@+id/content_id">
<com.aurelhubert.ahbottomnavigation.AHBottomNavigation
android:id="@+id/myBottomNavigation_ID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
和我MainActivity.java：
public class MainActivity extends AppCompatActivity implements AHBottomNavigation.OnTabSelectedListener {
private AHBottomNavigation bottomNavigation;
private FragenFragment fragenFragment;
private StatistikenFragment statistikenFragment;
private ParteienFragment parteienFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportActionBar().hide();
parteienFragment = new ParteienFragment();
statistikenFragment = new StatistikenFragment();
fragenFragment = new FragenFragment();
bottomNavigation = (AHBottomNavigation) findViewById(R.id.myBottomNavigation_ID);
bottomNavigation.setOnTabSelectedListener(this);
bottomNavigation.setDefaultBackgroundColor(Color.BLUE);
this.createNavItems();
}
//Create items, add them to bar, set propertied and set current item
private void createNavItems() {
//CREATE ITEMS
AHBottomNavigationItem ohnemundItem = new AHBottomNavigationItem("Parteien", R.drawable.parteienicon);
AHBottomNavigationItem grinseItem = new AHBottomNavigationItem("Statistiken", R.drawable.statsicon);
AHBottomNavigationItem lachItem = new AHBottomNavigationItem("Fragen", R.drawable.fragenicon);
//ADD THEM to bar
bottomNavigation.addItem(ohnemundItem);
bottomNavigation.addItem(grinseItem);
bottomNavigation.addItem(lachItem);
//set properties
bottomNavigation.setDefaultBackgroundColor(Color.parseColor("#FEFEFE"));
//set current item
bottomNavigation.setCurrentItem(0);
}
@Override
public void onTabSelected(int position, boolean wasSelected) {
if (position == 0) {
getSupportFragmentManager().beginTransaction().replace(R.id.content_id, parteienFragment).commit();
} else if (position == 1) {
getSupportFragmentManager().beginTransaction().replace(R.id.content_id, statistikenFragment).commit();
} else if (position == 2) {
getSupportFragmentManager().beginTransaction().replace(R.id.content_id, fragenFragment).commit();
}
}
}