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我想在我的應用程序的選項卡中創建選項卡。我在MainActivity XML文件和ViewPager中創建了一個TabLayout。然後我創建了另一個XML文件，其中包含內部TabLayout及其相應的ViewPager。現在，當我運行我的應用程序時，除了我的第一個選項卡（主圖標選項卡）外，我可以看到所有其他選項卡的充氣視圖。另外，當我選擇了一個沒有被看到的內部選項卡時，我會顯示一個CardView。請幫忙！ 這是我的MainActivity.java代碼：ViewPager不會膨脹所有XML佈局文件
public class MainActivity extends AppCompatActivity {
ViewPager viewPagerOuter, viewPagerInner;
TabLayout tabLayoutouter, tabLayoutinner;
public static class InnerFragment extends Fragment{
private static final String TAB_POSITION = "tab_position";
View rootView;
public InnerFragment(){
}
public static InnerFragment newInstance(int tabPosition){
InnerFragment fragment = new InnerFragment();
Bundle args = new Bundle();
args.putInt(TAB_POSITION, tabPosition);
fragment.setArguments(args);
return fragment;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
Bundle args = getArguments();
int tabPosition = args.getInt(TAB_POSITION);
switch (tabPosition){
case 0:{
rootView = inflater.inflate(R.layout.card_view_layout, container, false);
break;
}
case 1:{
TextView tv = new TextView(getActivity());
tv.setGravity(Gravity.CENTER);
tv.setText("Text in tab #" + tabPosition);
rootView = tv;
break;
}
}
return rootView;
}
}
static class InnerPagerAdapter extends FragmentStatePagerAdapter{
public InnerPagerAdapter(FragmentManager fm){
super(fm);
}
@Override
public Fragment getItem(int position) {
return InnerFragment.newInstance(position);
}
@Override
public int getCount() {
return 2;
}
@Override
public CharSequence getPageTitle(int position){
String x = "";
switch (position){
case 0:
x = "feed"; break;
case 1:
x = "events"; break;
}
return x;
}
}
public static class OuterFragment extends Fragment{
private static final String TAB_POSITION1 = "tab_position";
View rootView;
public OuterFragment(){
}
public static OuterFragment newInstance(int tabPosition){
OuterFragment fragment1 = new OuterFragment();
Bundle args1 = new Bundle();
args1.putInt(TAB_POSITION1, tabPosition);
fragment1.setArguments(args1);
return fragment1;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater1, ViewGroup container1, Bundle savedInstanceState){
Bundle args1 = getArguments();
int tabPosition = args1.getInt(TAB_POSITION1);
switch (tabPosition){
case 0:{
rootView = inflater1.inflate(R.layout.inner_tab_layout, container1, false);
break;
}
default:{
TextView tv = new TextView(getActivity());
tv.setGravity(Gravity.CENTER);
tv.setText("Text in tab #" + tabPosition);
rootView = tv;
break;
}
}
return rootView;
}
}
static class OuterPagerAdapter extends FragmentStatePagerAdapter{
public OuterPagerAdapter(FragmentManager fm){
super(fm);
}
@Override
public Fragment getItem(int position) {
return OuterFragment.newInstance(position);
}
@Override
public int getCount() {
return 4;
}
@Override
public CharSequence getPageTitle(int position) {return null;}
}
final int icons[] = new int[]{R.drawable.ic_chat_black_24dp, R.drawable.ic_home_black_24dp, R.drawable.ic_notifications_black_24dp, R.drawable.ic_person_black_24dp};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
InnerPagerAdapter innerPagerAdapter = new InnerPagerAdapter(getSupportFragmentManager());
OuterPagerAdapter outerPagerAdapter = new OuterPagerAdapter(getSupportFragmentManager());
viewPagerOuter = (ViewPager) findViewById(R.id.viewpagerouter);
viewPagerOuter.setAdapter(outerPagerAdapter);
tabLayoutouter = (TabLayout) findViewById(R.id.tablayoutouter);
final LayoutInflater factory = getLayoutInflater();
final View view = factory.inflate(R.layout.inner_tab_layout, null);
viewPagerInner = (ViewPager) view.findViewById(R.id.viewpagerinner);
viewPagerInner.setAdapter(innerPagerAdapter);
tabLayoutinner = (TabLayout) view.findViewById(R.id.tabLayoutinner);
tabLayoutinner.setupWithViewPager(viewPagerInner);
}
}
這是MainActivity的XML文件：
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="@+id/tablayoutouter"
android.support.tabIndicatorColor="?attr/colorPrimary"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:theme="@style/ThemeOverlay.AppCompat.Dark"
app:tabGravity="fill"
app:tabIndicatorColor="@color/colorPrimary"
app:tabSelectedTextColor="@android:color/background_light">
<android.support.v4.view.ViewPager
android:id="@+id/viewpagerouter"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</android.support.v4.view.ViewPager>
</LinearLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
android:src="@drawable/ic_create_black_24dp" />
</RelativeLayout>
這是inner_tab_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayoutinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabIndicatorColor="@color/colorPrimaryDark"
app:tabSelectedTextColor="@color/colorBlack">
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpagerinner"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
我張貼這樣長的對不起代碼位。請不要介意..
在0的情況下，它說getSupportFragmentManager（）不能從靜態上下文訪問。 – thapro
使用getActivity（）。getSupportFragmentManager（）;我已經更新了我的答案。 – FAT
我發現了一個小問題。在滾動到外部TabLayout中最後一個選項卡並回到第一個選項卡後，我發現卡片視圖不顯示。此外，內TabLayout中的選項卡數量增加了...我不知道爲什麼...任何想法？ – thapro