Java 片段中的ViewPager出错
此行显示错误:mPageAdapter=new PageAdapter(this.getSupportFragmentManager(),fragments);错误是:更改为getFragmentManager()或创建方法getSupportFragmentManager(),但我已经完成了这两项工作,但没有工作。所以请任何人帮帮我。什么需要改变 //ProjectOverview类Java 片段中的ViewPager出错,java,android,Java,Android,此行显示错误:mPageAdapter=new PageAdapter(this.getSupportFragmentManager(),fragments);错误是:更改为getFragmentManager()或创建方法getSupportFragmentManager(),但我已经完成了这两项工作,但没有工作。所以请任何人帮帮我。什么需要改变 //ProjectOverview类 public class ProjectOverview extends Activity { pr
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);
}
}
//Fragment2.class和Fragment3.class的代码相同,如果您想使用getSupportFragmentManager通过FragmentActivity扩展您的项目概述。它会起作用,这是支持库的问题,您的片段应该从支持库导入。 添加(选中):
您的活动应该扩展
FragmentActivity
,因此,如果您只针对较新的设备使用(扩展活动),您可以使用getFragmentManager()
(在旧设备上):getFragmentManager()
当我添加带有FragmentActivity的ProjectOverview时,仍然会出现相同的问题。编辑答案检查它是否对您有帮助
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();
}
}
<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>
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);
}
}