[英]Error in ViewPager in Fragments
Error shows in this line: mPageAdapter = new PageAdapter(this.getSupportFragmentManager(), fragments); 此行中显示错误:mPageAdapter = new PageAdapter(this.getSupportFragmentManager(),fragment); and Errors are : change to getFragmentManager() or create method getSupportFragmentManager() But I have done both but not working.
和错误是:更改为getFragmentManager()或创建方法getSupportFragmentManager()但我都做过,但是没有用。 so please anybody help me.
所以请大家帮我 what need to change.
需要改变什么。
//ProjectOverview class // ProjectOverview类
public class ProjectOverview extends Activity {
private PageAdapter mPageAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewpages_layout);
initialingpaging();
}
private void initialingpaging() {
List<Fragment> fragments = new Vector<Fragment>();
fragments.add(Fragment.instantiate(this, Fragment1.class.getName()));
fragments.add(Fragment.instantiate(this, Fragment2.class.getName()));
fragments.add(Fragment.instantiate(this, Fragment3.class.getName()));
mPageAdapter = new PageAdapter(this.getSupportFragmentManager(), fragments);
ViewPager pager = (ViewPager)findViewById(R.id.viewpager);
pager.setAdapter(mPageAdapter);
}
}
// PageAdapter class // PageAdapter类
public final class PageAdapter extends FragmentPagerAdapter {
private List<Fragment> fragments;
public PageAdapter(FragmentManager fm, List<Fragment> fragments) {
super(fm);
// TODO Auto-generated constructor stub
this.fragments = fragments;
}
@Override
public Fragment getItem(int arg0) {
// TODO Auto-generated method stub
return this.fragments.get(arg0);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return this.fragments.size();
}
}
//viewpages_layout.xml //viewpages_layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="@+android:id/viewpager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
//Fragment1.class //Fragment1.class
public class Fragment1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// TODO Auto-generated method stub
if(container == null)
{
return null;
}
return (LinearLayout) inflater.inflate(R.layout.fragment1_layout,container,false);
}
}
//same code for Fragment2.class and Fragment3.class // Fragment2.class和Fragment3.class的相同代码
If you would like to use getSupportFragmentManager extend your ProjectOverview with FragmentActivity. 如果要使用getSupportFragmentManager,请使用FragmentActivity扩展ProjectOverview。 It will work, it is an issue with support library and yours fragments should be imported from support library.
它将起作用,这是支持库的问题,您的片段应从支持库导入。 Added (checked): Your activity should extends
FragmentActivity
so you can use getSupportFragmentManager()
(on older device) if you are targeting only newer device use (extend Activity): getFragmentManager()
已添加(选中):您的活动应扩展
FragmentActivity
以便在仅针对较新的设备使用时(扩展活动)使用getSupportFragmentManager()
(在较旧的设备上): getFragmentManager()
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