Java 更改ExpandableListView中指示器的位置导致问题
我正试图将我的指示器设置在textview旁边,但我就是找不到正确的代码 XML: 主要的问题是它“强调”了newGroupView方法等,因为我没有这样的方法,也没有提到如何在我所看到的方法中创建它Java 更改ExpandableListView中指示器的位置导致问题,java,android,eclipse,expandablelistview,Java,Android,Eclipse,Expandablelistview,我正试图将我的指示器设置在textview旁边,但我就是找不到正确的代码 XML: 主要的问题是它“强调”了newGroupView方法等,因为我没有这样的方法,也没有提到如何在我所看到的方法中创建它 另外,一旦我得到了解决方案,有人能试着向我解释一下这个代码吗?我已经阅读了很多时间,只是无法理解它,我是一个初学者。下面是一个自定义可扩展列表视图的示例: 如果在新项目中应用此代码,您希望看到什么: 将此代码创建到活动中 public class ExpActivity extends Acti
另外,一旦我得到了解决方案,有人能试着向我解释一下这个代码吗?我已经阅读了很多时间,只是无法理解它,我是一个初学者。下面是一个自定义可扩展列表视图的示例: 如果在新项目中应用此代码,您希望看到什么: 将此代码创建到活动中
public class ExpActivity extends Activity
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Находим наш list
ExpandableListView listView = (ExpandableListView)findViewById(R.id.exListView);
//Создаем набор данных для адаптера
ArrayList<ArrayList<String>> groups = new ArrayList<ArrayList<String>>();
ArrayList<String> children1 = new ArrayList<String>();
ArrayList<String> children2 = new ArrayList<String>();
children1.add("Child_1");
children1.add("Child_2");
groups.add(children1);
children2.add("Child_1");
children2.add("Child_2");
children2.add("Child_3");
groups.add(children2);
//Создаем адаптер и передаем context и список с данными
ExpListAdapter adapter = new ExpListAdapter(getApplicationContext(), groups);
listView.setAdapter(adapter);
}
}
child_view.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textChild"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:textColor="@android:color/white"
/>
<Button
android:id="@+id/buttonChild"
android:layout_width="100dp"
android:layout_height="40dp"
android:layout_marginLeft="150dp"
android:layout_marginTop="10dp"
android:text="Button"
android:focusable="false"
/>
</LinearLayout>
感谢您的回复,我更改了XML,但问题仍然存在于java代码中。它仍然在“newGroupView”下面加下划线,因为在我的代码中没有这样的方法。
public class ExpActivity extends Activity
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Находим наш list
ExpandableListView listView = (ExpandableListView)findViewById(R.id.exListView);
//Создаем набор данных для адаптера
ArrayList<ArrayList<String>> groups = new ArrayList<ArrayList<String>>();
ArrayList<String> children1 = new ArrayList<String>();
ArrayList<String> children2 = new ArrayList<String>();
children1.add("Child_1");
children1.add("Child_2");
groups.add(children1);
children2.add("Child_1");
children2.add("Child_2");
children2.add("Child_3");
groups.add(children2);
//Создаем адаптер и передаем context и список с данными
ExpListAdapter adapter = new ExpListAdapter(getApplicationContext(), groups);
listView.setAdapter(adapter);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ExpandableListView
android:id="@+id/exListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:indicatorLeft="250dp"
android:indicatorRight="300dp"
/>
</LinearLayout>
public class ExpListAdapter extends BaseExpandableListAdapter {
private ArrayList<ArrayList<String>> mGroups;
private Context mContext;
public ExpListAdapter (Context context,ArrayList<ArrayList<String>> groups){
mContext = context;
mGroups = groups;
}
@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
}
TextView textGroup = (TextView) convertView.findViewById(R.id.textGroup);
textGroup.setText("Group " + Integer.toString(groupPosition));
return convertView;
}
@Override
public View getChildView(int groupPosition, 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);
}
TextView textChild = (TextView) convertView.findViewById(R.id.textChild);
textChild.setText(mGroups.get(groupPosition).get(childPosition));
Button button = (Button)convertView.findViewById(R.id.buttonChild);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(mContext,"button is pressed",5000).show();
}
});
return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textGroup"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="20dp"
android:textColor="@android:color/white"
android:textStyle="bold"
/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textChild"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:textColor="@android:color/white"
/>
<Button
android:id="@+id/buttonChild"
android:layout_width="100dp"
android:layout_height="40dp"
android:layout_marginLeft="150dp"
android:layout_marginTop="10dp"
android:text="Button"
android:focusable="false"
/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_expanded="true"
android:drawable="@drawable/imageOpen">
</item>
<item android:state_empty="true"
android:drawable="@drawable/imageClose">
</item>
</selector>
android:groupIndicator="@drawable/indicator"