我有分类&子类别。我必须在viewpager中创建viewpager但我不能显示Frag2内容... tnx 4帮助
activity_tab.xml& TabActivity
public class TabActivity extends AppCompatActivity {
MaterialTabs tabHost;
ViewPager pager;
ViewPagerAdapter1 pagerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tab);
ViewPagerAdapter1 adapter = new ViewPagerAdapter1(getSupportFragmentManager());
ViewPager pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
}
}

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".testttttttttt.TabActivity">
<android.support.v4.view.PagerTabStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"/>
</android.support.v4.view.ViewPager>
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public class ViewPagerAdapter1 extends FragmentStatePagerAdapter {
public ViewPagerAdapter1(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return new Frag1();
}
@Override
public int getCount() {
return 3;
}
@Override
public CharSequence getPageTitle(int position) {
return "TAB " + (position + 1);
}
}
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public class Frag1 extends Fragment {
View view;
MaterialTabs tabHost;
ViewPager pager;
ViewPagerAdapter2 pagerAdapter;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.activity_tab1, container, false);
//Init View Pager
tabHost = (MaterialTabs) view.findViewById(R.id.tabHost);
pager = (ViewPager) view.findViewById(R.id.pager);
pagerAdapter = new ViewPagerAdapter2(getFragmentManager());
pager.setAdapter(pagerAdapter);
tabHost.setViewPager(pager);
// Set Custom Font
Typeface typeface = Typeface.createFromAsset(getActivity().getAssets(), "fonts/BYekan.ttf");
tabHost.setTypeface(typeface, Typeface.NORMAL);
pager.setOffscreenPageLimit(5);
pager.setCurrentItem(4);
return view;
}
}
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:gravity="right"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#ffea00">
<ir.negaryab.negaryab.Util.MaterialTab.MaterialTabs
android:id="@+id/tabHost"
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="@color/ColorPrimary"
android:textColor="@color/Gray"
app:mtIndicatorColor="@color/ScrollColor"
app:mtTextColorSelected="@color/White"
app:mtMrlRippleColor="@color/ScrollColor"
app:mtTextSelectedStyle="bold"
app:mtTextUnselectedStyle="normal"
app:mtSameWeightTabs="false"
app:mtPaddingMiddle="false" />
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tabHost" />
</LinearLayout>
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public class ViewPagerAdapter2 extends FragmentStatePagerAdapter {
public ViewPagerAdapter2(FragmentManager fm) {
super(fm);
}
public Fragment getItem(int num) {
switch (num) {
case 0:
return new Frag2();
case 1:
return new Frag2();
case 2:
return new Frag2();
case 3:
return new Frag2();
default:
break;
}
return null;
}
@Override
public int getCount() {
return 4;
}
String[] title={"فکت","ثبت طلا","ثبت آر","آرمن"};
@Override
public CharSequence getPageTitle(int position) {
return title[position];
}
}
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public class Frag2 extends Fragment {
String ss="";
View view;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.activity_tab2, container, false);
TextView txt=(TextView)view.findViewById(R.id.txt);
txt.setText("khghjghj");
return view;
}
}
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff0000">
<TextView
android:text="fgfffgg"
android:textSize="24dp"
android:textColor="@color/Black"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/txt"
android:gravity="center_vertical|center_horizontal"
android:layout_gravity="center_horizontal" />
</LinearLayout>
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