我的FragmentPagerAdapter
视图寻呼机实现没有显示任何内容。我试图将其更改为FragmentStatePagerAdapter
,但它根本没用。
主要活动类
public enum TYPES {
OBJECT_TYPE, TRACKS}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SimpleObject simpleObject = new SimpleObject("left","inside","right");
ViewPager viewPager = (ViewPager)findViewById(R.id.visitMuseumPager);
viewPager.setAdapter(new ViewPagerAdapter(this.getSupportFragmentManager(), simpleObject, TYPES.TRACKS));
}
ViewPagerAdapter
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
private SimpleObject simpleObject;
MainActivity.TYPES type;
public ViewPagerAdapter(FragmentManager fm, SimpleObject simpleObjects, MainActivity.TYPES type) {
super(fm);
this.simpleObject =simpleObjects;
this.type=type;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
return super.instantiateItem(container, position);
}
@Override
public Fragment getItem(int position) {
Bundle bundle = new Bundle();
bundle.putParcelable("simpleObject", simpleObject);
if(type.equals(TRACKS)){
switch (position){
case 0:{
LeftFragment leftFragment = new LeftFragment();
leftFragment.setArguments(bundle);
return leftFragment;
}
case 1:{
InsideFragment insideFragment = new InsideFragment();
insideFragment.setArguments(bundle);
return insideFragment;
}
case 2:{
RightFragment rightFragment = new RightFragment();
rightFragment.setArguments(bundle);
return rightFragment;
}
}}
else if (type.equals(OBJECT_TYPE)){
switch (position){
case 0:{
LeftFragment leftFragment = new LeftFragment();
leftFragment.setArguments(bundle);
return leftFragment;
}
case 1:{
InsideFragment insideFragment = new InsideFragment();
insideFragment.setArguments(bundle);
return insideFragment;
}}
}
return null;
}
@Override
public int getCount() {
if (type.equals(TRACKS))return 3;
else return 2;
}}
片段实施(其余部分类似)
public class LeftFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.left_tab, container, false);
TextView textView=(TextView) view.findViewById(R.id.leftTab);
SimpleObject simpleObject = getArguments().getParcelable("simpleObject");
textView.setText(simpleObject.getLeftVal());
return view;
}
}
主要活动XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.k.testy.MainActivity"
android:orientation="vertical"
android:weightSum="1">
<android.support.v4.view.ViewPager
android:id="@+id/visitMuseumPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
android:animateLayoutChanges="true"
/></LinearLayout>
左片段XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1"
android:background="@color/black">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".1">
<include layout="@layout/tab_buttons"/>
</LinearLayout>
<TextView
android:id="@+id/leftTab"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="LEFT"/>
答案 0 :(得分:3)
从XML中的ViewPager中删除
android:visibility="gone"