本文介绍了Android NestedScrollView 仅显示 ListView 中的一项的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有人知道我的布局有什么问题吗?我不知道为什么我的 ListView 只显示一项.
Anyone knows what's wrong in my layout? I'm not able to figure out if why is my ListView is showing only one item.
Layout.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/grey_200"
android:paddingLeft="10dp"
android:paddingRight="10dp"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.rostata.alejo.vbmobileapp.ActivityResult"
tools:showIn="@layout/activity_home">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:id="@+id/one">
<android.support.v7.widget.CardView
android:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="0dp"
android:background="@color/White"
android:focusable="true"
android:focusableInTouchMode="true"
android:layout_marginTop="20dp"
app:cardCornerRadius="4dp"
app:cardElevation="2dp">
<RelativeLayout
android:id="@+id/relativeGridInside"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/White"
android:padding="10dp">
<RelativeLayout
android:id="@+id/headerThisNow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/border_bottom">
<Button
android:id="@+id/btnCloseWordOfTheDay"
style="?android:attr/buttonStyleSmall"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="@drawable/ic_window_close"
android:text="" />
<TextView
android:id="@+id/textView9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:fontFamily="sans-serif-light-bold"
android:text="Word of the Day"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="@color/grey_700"
android:textSize="25sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/headerThisNow">
<TextView
android:id="@+id/wordNow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="5dp"
android:fontFamily="sans-serif-light-bold"
android:text="Paghurop-hurop"
android:textColor="@color/grey_700"
android:textSize="20sp" />
<TextView
android:id="@+id/thisPronounceNow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/wordNow"
android:fontFamily="sans-serip-light"
android:text="-Pag-hu-rop-hu-rop-"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/grey_400"
android:textStyle="italic" />
<TextView
android:id="@+id/maningTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/thisPronounceNow"
android:layout_centerVertical="true"
android:layout_marginTop="10dp"
android:text="Meaning"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold" />
<TextView
android:id="@+id/thisMeaningNow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/maningTitle"
android:ellipsize="end"
android:maxLines="2"
android:text="If ever na mabasa nindu ini, sample lang pu ni, maung comment please"
android:textAppearance="?android:attr/textAppearanceMedium" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/thisMeaningNow"
android:layout_marginTop="10dp">
<Button
android:id="@+id/btnVoice"
style="?android:attr/buttonStyleSmall"
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignTop="@+id/btnMore"
android:background="@drawable/ic_voice"
android:padding="0dp"
android:text="" />
<ToggleButton
android:id="@+id/checkBox"
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_alignTop="@+id/btnVoice"
android:layout_toEndOf="@+id/btnVoice"
android:layout_toRightOf="@+id/btnVoice"
android:layout_marginLeft="10dp"
android:background="@drawable/toogle_favorite_check"
android:text=""
android:textOff=""
android:textOn="" />
<Button
android:id="@+id/btnMore"
style="?android:attr/buttonStyleSmall"
android:layout_width="100dp"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:background="@drawable/btn_more"
android:text="More"
android:textColor="@color/White" />
</RelativeLayout>
</RelativeLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/card_view"
android:id="@+id/words_list_view"
android:divider="@color/transparent"
android:scrollbars="none"
android:layout_weight="1"/>
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
我正在使用 Fragment Activity 和 SimpleCusrsorAdapter 将项目填充到我的 ListView.万一，这是我的班级；
I am using A Fragment Activity and SimpleCusrsorAdapter to populate an items to my ListView. in case of, this is my class;
public class ActivityHome extends Fragment {
CardView cardViewWordOfTheDay;
private WordsDbAdapter dbHelper;
private SimpleCursorAdapter dataAdapter;
private String wordFromSpinner = "ALL";
ListView listView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.layout, container, false);
Button btnCloseWordOfTheDay = (Button) view.findViewById(R.id.btnCloseWordOfTheDay);
listView = (ListView) view.findViewById(R.id.words_list_view);
btnCloseWordOfTheDay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
cardViewWordOfTheDay = (CardView) view.findViewById(R.id.card_view);
cardViewWordOfTheDay.setVisibility(View.GONE);
}
});
dbHelper = new WordsDbAdapter(getActivity().getApplicationContext());
dbHelper.open();
displayListView(wordFromSpinner);
return view;
}
private void displayListView(String wordFromSpinnerData) {
Cursor cursor = null;
try {
cursor = dbHelper.fetchAllWords(wordFromSpinnerData);
} catch (Exception e) {
Toast.makeText(getActivity().getApplicationContext(), "EER " + e, Toast.LENGTH_LONG).show();
}
String[] columns = new String[]{
WordsDbAdapter.KEY_ONE, WordsDbAdapter.KEY_TWO,
WordsDbAdapter.KEY_THREE, WordsDbAdapter.KEY_FOUR, WordsDbAdapter.KEY_FIVE
};
int[] to = new int[]{
R.id.thisWord, R.id.thisSub, R.id.thisWordFrom, R.id.thisWordLocation, R.id.thisLetter
};
dataAdapter = new SimpleCursorAdapter(getActivity().getApplicationContext(), R.layout.words_list_item, cursor, columns, to, 0);
listView.setAdapter(dataAdapter);
}
}
我很困惑.我不知道发生了什么.当我尝试将我的 RelativeLayout 的高度更改为 500dp 然后 listView 显示其他项目但不是全部.所以我想我需要它是 wrap_parent 但这并没有给我预期的输出.
I'm so confused. i dont what happen. when i try to change the height of my RelativeLayout to 500dp then the listView is showing the other items but not all. so i think i need it to be wrap_parent but this is not giving me the expected ouput.
任何帮助将不胜感激.非常感谢！！！
Any help would be appreciated. Thank You Very Much!!!
推荐答案
如前所述这里、
可以在listView.setAdapter(dataAdapter);
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null)
return;
int desiredWidth = View.MeasureSpec.makeMeasureSpec(
listView.getWidth(), View.MeasureSpec.UNSPECIFIED);
int totalHeight = 0;
View view = null;
for (int i = 0; i < listAdapter.getCount(); i++) {
view = listAdapter.getView(i, view, listView);
if (i == 0)
view.setLayoutParams(new ViewGroup.LayoutParams(
desiredWidth, LayoutParams.WRAP_CONTENT));
view.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
totalHeight += view.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}
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