我对此感到有些疯狂。
我有一个包含Fragment
的ViewPager
。
我希望此ViewPager
包含一些Fragment
。 (始终相同,但参数不同)。Fragments
已创建(至少是第2个),但是我的ViewPager
内容保留为空白,没有任何变化。
我错过了什么吗?
我的FragmentActivity
public class TrackingActivity extends FragmentActivity {
static FragmentManager fragmentManager;
static FragmentTransaction fragmentTransaction;
static TrackingMensurationsFragment mensurationFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tracking);
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
mensurationFragment = new TrackingMensurationsFragment();
fragmentTransaction.add(R.id.fragmentContainerLL, mensurationFragment);
fragmentTransaction.commit();
}
}
我的TrackingMensurationsFragment片段:
public class TrackingMensurationsFragment extends Fragment {
View fragmentView;
ViewPager pager;
FragmentAdapter pageAdapter;
TrackingMensurationPagerAdapter viewAdapter;
Handler mHandler;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
fragmentView = inflater.inflate(R.layout.fragment_tracking_mensurations, container, false);
// new setAdapterTask().execute();
return fragmentView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
pager = (ViewPager) getView().findViewById(R.id.pager);
String flux = ((MyApp) getActivity().getApplicationContext()).getWebResponse(18);
List<Fragment> fragments = new Vector<Fragment>();
try {
JSONArray jArray = new JSONObject(flux).getJSONArray("Mensurations");
for (int i = (jArray.length() - 1); i >= 0; i--) {
Bundle bundle = new Bundle();
bundle.putString("ARM_SIZE", jArray.getJSONObject(i).getString("ARM_SIZE"));
bundle.putString("THIGH_SIZE", jArray.getJSONObject(i).getString("THIGH_SIZE"));
bundle.putString("HIP_SIZE", jArray.getJSONObject(i).getString("HIP_SIZE"));
bundle.putString("WAIST_SIZE", jArray.getJSONObject(i).getString("WAIST_SIZE"));
bundle.putString("DietData_Date", jArray.getJSONObject(i).getString("DietData_Date").substring(0, 5));
fragments.add(Fragment.instantiate(getActivity(), TrackingMensurationPagerFragment.class.getName(), bundle));
}
} catch (JSONException e) {
e.printStackTrace();
}
pageAdapter = new FragmentAdapter(getChildFragmentManager(), fragments);
mHandler = new Handler();
mHandler.post(new Runnable() {
@Override
public void run() {
pager.setAdapter(pageAdapter);
}
});
}
}
使用xml中的ViewPager:
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
我的FragmentAdapter:
public class FragmentAdapter extends FragmentStatePagerAdapter{
private List<Fragment> fragments;
public FragmentAdapter(FragmentManager fm, List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
Log.d("FragmentAdapter","constructor");
}
@Override
public Fragment getItem(int position) {
Log.d("FragmentAdapter","getItem "+position);
return this.fragments.get(position);
}
@Override
public int getCount() {
Log.d("FragmentAdapter","getCount: "+this.fragments.size());
return this.fragments.size();
}
@Override
public int getItemPosition(Object object){
return PagerAdapter.POSITION_NONE;
}
}
我的LogCat输出:
D / FragmentAdapter(30805):构造函数D / FragmentAdapter(30805):
getCount:12 D / dflkjghkldfjghdfkjg(30805):qgsdhgklsqdjghjdfskg
D / FragmentAdapter(30805):getCount:12 D / FragmentAdapter(30805):
getItem 0 D / FragmentAdapter(30805):getItem 1
D / FragmentAdapter(30805):getCount:12 D / dalvikvm(30805):GC_FOR_ALLOC
释放322K,30%释放12905K / 18311K,暂停30ms,共30ms
I / dalvikvm-heap(30805):将堆(片段大小写)增加到14.546MB
737536字节分配D / dalvikvm(30805):GC_FOR_ALLOC已释放1K,29%
免费13624K / 19079K,暂停20ms,总计20ms
D / TrackingMensurationPagerFragment(30805):日期:02/11
D / TrackingMensurationPagerFragment(30805):日期:30/09
D / FragmentAdapter(30805):getCount:12 D / FragmentAdapter(30805):
getCount:12 D / FragmentAdapter(30805):getCount:12
D / FragmentAdapter(30805):getCount:12 D / FragmentAdapter(30805):
getCount:12 D / FragmentAdapter(30805):getCount:12
D / FragmentAdapter(30805):getCount:12 D / FragmentAdapter(30805):
getCount:12 D / FragmentAdapter(30805):getCount:12
D / FragmentAdapter(30805):getCount:12
编辑:我的Fragment的xml:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/mettreAJourTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="@drawable/btn_vert_degrade_fort"
android:padding="10dp"
android:text="@string/maj_caps"
android:textColor="#FFFFFF" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:layout_toLeftOf="@id/mettreAJourTV"
android:text="@string/mensurations"
android:textColor="#d33274"
android:textSize="17dp" />
</RelativeLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:text="@string/infos_perso_evolution_poids" />
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</ScrollView>
最佳答案
在我的情况下,问题是我的Fragment
的根元素(是ViewPager
的父元素)是ScrollView
。看来ViewPager不能包含在ScrollView
中。