在同一个活动中使用android.support.v4.app.Fragment和android.app.Fragment

时间:2017-09-04 08:21:11

标签: java android android-fragments

我的MainActivity使用两种类型的片段:

  

com.google.android.gms.maps.SupportMapFragment

  

com.ankitshubham97.myapp.NotifFragment。

对于com.google.android.gms.maps.SupportMapFragment,需要android.support.v4.app.Fragment,但对于com.ankitshubham97.myapp.NotifFragment,则需要android.app.Fragment。我无法导入它们。解决这个问题有一些巧妙的解决方案吗?我已经查看了How to mix android.support.v4.app.Fragment and android.app.FragmentAndroid using both getFragmentManager and getSupportFragmentManager causes overlapping,但他们有点老了,并且想到有人有一个简洁的解决方案,除了之前链接中的建议。

这是我的activity.xml的片段声明部分:

<FrameLayout
    android:id="@+id/content"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1">
    <fragment
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:map="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </fragment>

    <fragment
        android:id="@+id/notif"
        android:name="com.ankitshubham97.myapp.NotifFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </fragment>
</FrameLayout>

我的MainActivity.java的onCreate函数(有错误):

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        notifFragment =  getFragmentManager().findFragmentById(R.id.notif);
        getFragmentManager().beginTransaction().hide(notifFragment);
        mapFragment.getMapAsync(this);
        navigation = (AHBottomNavigation) findViewById(R.id.navigation);
        AHBottomNavigationItem item1 = new AHBottomNavigationItem(R.string.title_home, R.drawable.ic_home_black_24dp, R.color.colorBottomNavigationPrimary);
        AHBottomNavigationItem item2 = new AHBottomNavigationItem(R.string.title_dashboard, R.drawable.ic_dashboard_black_24dp, R.color.colorBottomNavigationPrimary);
        AHBottomNavigationItem item3 = new AHBottomNavigationItem(R.string.title_notifications, R.drawable.ic_notifications_black_24dp, R.color.colorBottomNavigationPrimary);
        navigation.addItem(item1);
        navigation.addItem(item2);
        navigation.addItem(item3);
        navigation.setOnTabSelectedListener(new AHBottomNavigation.OnTabSelectedListener() {
            @Override
            public boolean onTabSelected(int position, boolean wasSelected) {
                FragmentManager sfm = getSupportFragmentManager();
                FragmentTransaction sft= sfm.beginTransaction();
                switch (position) {
                    case 0:
                        Log.d(TAG,(mapFragment==null)+"");
                        sft.show(mapFragment);
                        ft.hide(notifFragment);
                        sft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                        sft.commit();
                        Toast.makeText(getApplicationContext(),R.string.title_home,Toast.LENGTH_SHORT).show();
                        return true;

                    case 1:

                        sft.hide(mapFragment);
                        ft.show(notifFragment);
                        sft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
                        sft.commit();addToBackStack(null).commit();
                        Toast.makeText(getApplicationContext(),R.string.title_dashboard,Toast.LENGTH_SHORT).show();
                        return true;
                    case 2:
                        Toast.makeText(getApplicationContext(),R.string.title_notifications,Toast.LENGTH_SHORT).show();
                        navigation.setNotification("",2);
                        spEditor.putInt(NOTIFCOUNT,0);
                        spEditor.apply();
                        return true;
                }
                return true;
            }
        });
}

2 个答案:

答案 0 :(得分:0)

无论您使用“Fragment”,请使用包含该包的特定类。因此,根据具体情况,将“Fragment”替换为“android.support.v4.app.Fragment”或“android.app.Fragment”。

这会解决您的问题吗?

答案 1 :(得分:0)

我发现了问题。 NotifFragment课程已延长android.support.v4.app.Fragment,这就是我必须使用getSupportFragmentManager().findFragmentById(R.id.notif);代替getFragmentManager().findFragmentById(R.id.notif);的原因。同样在导入中,我必须使用android.support.v4.app.*而不是android.app.*