对不起我的英语不好。我花了很多时间尝试解决我的问题，但是我做不到。我有listView，在此列表视图中为某些元素创建微调器。在适配器中创建了微调器。我无法获得价值微调器。它与我很难。请he愈
我的适配器
public class ExpListAdapter extends BaseExpandableListAdapter {
private ArrayList<ArrayList<String>> mGroups;
private ArrayList<DeviceObject> deviceObList;
private ArrayList<RoomSuggestion> roObjList;
private Context mContext;
public ExpListAdapter (Context context,ArrayList<ArrayList<String>> groups, ArrayList<DeviceObject> deviceObList, ArrayList<RoomSuggestion> roObjList){
mContext = context;
mGroups = groups;
this.deviceObList = deviceObList;
this.roObjList = roObjList;
}
@Override
public int getGroupCount() {
return mGroups.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return mGroups.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return mGroups.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return mGroups.get(groupPosition).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.group_view, null);
}
if (isExpanded){
//Изменяем что-нибудь, если текущая Group раскрыта
}
else{
//Изменяем что-нибудь, если текущая Group скрыта
}
Typeface lightFace = Typeface.createFromAsset(mContext.getAssets(), "font/GothamProLight.ttf");
TextView textGroup = (TextView) convertView.findViewById(R.id.textGroup);
textGroup.setTypeface(lightFace);
textGroup.setText("Thereses gate 46");
return convertView;
}
@Override
public View getChildView(int groupPosition, final int childPosition, boolean isLastChild,
View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.child_view, null);
}
Typeface mediumFace = Typeface.createFromAsset(mContext.getAssets(), "font/GothamProMedium.ttf");
TextView textChild = (TextView) convertView.findViewById(R.id.textChild);
textChild.setTypeface(mediumFace);
textChild.setText( mGroups.get(groupPosition).get(childPosition) );
RelativeLayout rl = (RelativeLayout) convertView.findViewById(R.id.bg_button_screen);
if( !deviceObList.get(childPosition).getProduct_id().equals("0") ) {
rl.setBackgroundColor(Color.parseColor("#4fcc54"));
View linearLayoutG = convertView.findViewById(R.id.container);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(10, 0, 10, 30);
linearLayoutG.setLayoutParams(layoutParams);
RelativeLayout spinnerOpen = (RelativeLayout) convertView.findViewById(R.id.spinnerOpen);
View linearLayout = convertView.findViewById(R.id.spinnerL);
ImageView imageS = (ImageView)convertView.findViewById(R.id.spinnerImage);
imageS.getLayoutParams().width = 20;
imageS.getLayoutParams().height = 20;
imageS.setImageResource(R.drawable.spin_ok);
ArrayList<String> list = new ArrayList<String>();
for(int i = 0; i < roObjList.size(); i++) {
list.add(roObjList.get(i).getName() );
}
final Spinner spinner = new Spinner(mContext);
//Make sure you have valid layout parameters.
spinner.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 100));
spinner.setBackgroundResource(R.drawable.bg_spinner);
ArrayAdapter spinnerArrayAdapter = new ArrayAdapter(mContext,
R.layout.spinner_item, list);
spinner.setAdapter(spinnerArrayAdapter);
//open spinner
spinnerOpen.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
spinner.performClick();
}
});
((LinearLayout) linearLayout).addView(spinner);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Log.e("selected", String.valueOf(parent.getItemAtPosition(position)) );
Log.e("childPosition", String.valueOf(childPosition));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
} else {
rl.setBackgroundColor(Color.parseColor("#e5910d"));
}
return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
我的适配器XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_marginBottom="5dp"
android:layout_height="wrap_content">
<RelativeLayout
android:id="@+id/bgchilddevice"
android:layout_width="match_parent"
android:layout_weight="0.3"
android:layout_marginLeft="5dp"
android:background="#26ffffff"
android:layout_marginRight="2.5dp"
android:layout_height="60dp">
<TextView
android:id="@+id/textChild"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#fff"
android:textSize="18dp"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
<RelativeLayout
android:id="@+id/bg_button_screen"
android:layout_weight="0.9"
android:layout_marginRight="5dp"
android:background="#4fcc54"
android:layout_width="match_parent"
android:layout_marginLeft="2.5dp"
android:layout_height="60dp">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/check"
android:id="@+id/imageView6"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:orientation="horizontal"
android:background="#26ffffff"
android:layout_height="wrap_content">
<LinearLayout
android:id="@+id/spinnerL"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_weight="0.2"
android:layout_centerHorizontal="true" />
<RelativeLayout
android:id="@+id/spinnerOpen"
android:layout_width="match_parent"
android:layout_marginRight="5dp"
android:layout_weight="0.8"
android:layout_height="match_parent">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/spinnerImage"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
而且我尝试获得微调元素
create.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for(int i = 0; i < listView.getAdapter().getCount(); i++ ) {
for(int j = 0; j < listView.getChildCount(); j++ ) {
View _mainView = listView.getChildAt(j);
LinearLayout _linearLayout = (LinearLayout) _mainView.findViewById(R.id.spinnerL);
Spinner spinner = (Spinner) _linearLayout.getChildAt(0);
String selection = (String) spinner.getSelectedItem();
Log.e("spinner device", selection);
}
}
}
});
我有
FATAL EXCEPTION: main java.lang.NullPointerException在
Spinner spinner = (Spinner) _linearLayout.getChildAt(0);行中我尝试写
Spinner spinner = (Spinner) _linearLayout.getChildAt(0);Spinner spinner = (Spinner) _linearLayout.getChildAt(1);Spinner spinner = (Spinner) _linearLayout.getChildAt(2);Spinner spinner = (Spinner) _linearLayout.getChildAt(3);它的错误
最佳答案
为什么不使用findViewById()作为微调框？
Spinner spinner =(Spinner) findViewById(R.id.spinnerL);
String value = spinner.getSelectedItem().toString();
关于java - 无法从ListView获取值(value)微调器，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31416265/