我想在第一个微调器中显示全选作为默认文本，为此，我使用了自定义适配器，但无法执行此操作。
我设置适配器的代码来像这样在旋转器中绑定数据：
private void getClientGroup() {
final APIInterface apiInterface = APIClient.getClient().create(APIInterface.class);
final FilterModel filterModel = new FilterModel("G", String.valueOf(clientid), String.valueOf(loginid), "A", String.valueOf(userrole));
Call<FilterModel> call1 = apiInterface.createClientGroup(filterModel);
call1.enqueue(new Callback<FilterModel>() {
@Override
public void onResponse(Call<FilterModel> call, Response<FilterModel> response) {
FilterModel filterResponse = response.body();
Log.e("Getclientgroup:", "success");
for (int i = 0; i < filterResponse.getT0().size(); i++) {
int groupId = filterResponse.getT0().get(i).getID();
String groupText = filterResponse.getT0().get(i).getTEXT();
Log.e("Groupid==", String.valueOf(groupId));
Log.e("GroupText==", String.valueOf(groupText));
groupTextList.add(groupText);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item, android.R.id.text1, groupTextList);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spGroup.setAdapter(
new NothingSelectedSpinner(
dataAdapter,
R.layout.nothing_selected_spinner_item, 0,
getActivity()));
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(R.layout.nothing_selected_spinner_item);
// attaching data adapter to spinner
spGroup.setAdapter(dataAdapter);
}
}
@Override
public void onFailure(Call<FilterModel> call, Throwable t) {
Log.e("Error is==", t.getMessage());
}
});
我正在为此使用Nothingselected适配器：
public class NothingSelectedSpinner implements SpinnerAdapter, ListAdapter {
protected static final int EXTRA = 1;
protected SpinnerAdapter adapter;
protected Context context;
protected int nothingSelectedLayout;
protected int nothingSelectedDropdownLayout;
protected LayoutInflater layoutInflater;
public NothingSelectedSpinner(SpinnerAdapter spinnerAdapter,
int nothingSelectedLayout, int nothingSelectedDropdownLayout, Context context) {
this.adapter = spinnerAdapter;
this.context = context;
this.nothingSelectedLayout = nothingSelectedLayout;
this.nothingSelectedDropdownLayout = nothingSelectedDropdownLayout;
layoutInflater = LayoutInflater.from(context);
}
@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
return null;
}
@Override
public int getCount() {
return 0;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public final View getView(int position, View convertView, ViewGroup parent) {
// This provides the View for the Selected Item in the Spinner, not
// the dropdown (unless dropdownView is not set).
if (position == 0) {
return getNothingSelectedView(parent);
}
return adapter.getView(position - EXTRA, null, parent); // Could re-use
// the convertView if possible.
}
protected View getNothingSelectedDropdownView(ViewGroup parent) {
return layoutInflater.inflate(nothingSelectedDropdownLayout, parent, false);
}
@Override
public int getItemViewType(int position) {
return 0;
}
@Override
public int getViewTypeCount() {
return 1;
}
@Override
public long getItemId(int position) {
return position >= EXTRA ? adapter.getItemId(position - EXTRA) : position - EXTRA;
}
@Override
public boolean hasStableIds() {
return adapter.hasStableIds();
}
@Override
public boolean isEmpty() {
return adapter.isEmpty();
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
adapter.registerDataSetObserver(observer);
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
adapter.unregisterDataSetObserver(observer);
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return position != 0; // Don't allow the 'nothing selected'
// item to be picked.
}
protected View getNothingSelectedView(ViewGroup parent) {
return layoutInflater.inflate(nothingSelectedLayout, parent, false);
}
}
此适配器的布局为：
<TextView
android:id="@+id/text1"
style="?android:attr/spinnerItemStyle"
android:singleLine="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:padding="@dimen/dp10"
android:textSize="@dimen/dp30"
android:textColor="@color/colorBlack"
android:text="Select all" />
微调器的主要布局是：
<LinearLayout
android:id="@+id/ll_filter_report"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/dp20"
android:layout_marginTop="@dimen/dp20"
android:layout_marginRight="@dimen/dp20"
android:background="@drawable/rounded_layout_white"
android:orientation="vertical">
<LinearLayout
android:id="@+id/ll_sub_group"
android:layout_width="match_parent"
android:layout_height="@dimen/dp80"
android:orientation="horizontal"
android:padding="@dimen/dp20"
android:weightSum="1">
<TextView
android:id="@+id/lbl_sub_group"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:gravity="left|center"
android:text="@string/str_sub_group"
android:textSize="@dimen/dp20" />
<Spinner
android:id="@+id/spn_sub_group"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"></Spinner>
</LinearLayout>
<LinearLayout
android:id="@+id/ll_client"
android:layout_width="match_parent"
android:layout_height="@dimen/dp80"
android:layout_marginTop="@dimen/dp10"
android:orientation="horizontal"
android:padding="@dimen/dp20"
android:weightSum="1">
<TextView
android:id="@+id/lbl_client"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:gravity="left|center"
android:text="@string/str_client"
android:textSize="@dimen/dp20" />
<Spinner
android:id="@+id/spn_client"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"></Spinner>
</LinearLayout>
<LinearLayout
android:id="@+id/ll_date"
android:layout_width="match_parent"
android:layout_height="@dimen/dp80"
android:layout_marginTop="@dimen/dp10"
android:orientation="horizontal"
android:padding="@dimen/dp20"
android:weightSum="1">
<TextView
android:id="@+id/lbl_date"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:gravity="left|center"
android:text="@string/str_as_on"
android:textSize="@dimen/dp20" />
<EditText
android:id="@+id/edt_date"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:hint="02/01/2019"
android:padding="@dimen/dp10"></EditText>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/dp20"
android:orientation="horizontal"
android:padding="@dimen/dp10"
android:weightSum="1">
<Button
android:id="@+id/btn_Search"
android:layout_width="@dimen/dp0"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="@color/colorLightBlue"
android:text="@string/str_search"
android:textAllCaps="false"
android:textColor="@color/colorWhite" />
<Button
android:id="@+id/btn_reset"
android:layout_width="@dimen/dp0"
android:layout_height="match_parent"
android:layout_marginLeft="@dimen/dp10"
android:layout_weight="0.5"
android:background="@color/colorLightBlue"
android:text="@string/str_reset"
android:textAllCaps="false"
android:textColor="@color/colorWhite" />
</LinearLayout>
</LinearLayout>
如果我选择默认文本，则要在第二个微调器中显示所有项目。如何选择第一个微调器的索引0处的所有项目？