ExpandableListView -UnsupportedOperationException：在AdapterView中不支持addView（View，LayoutParams）
我在Android中实现Expandable列表视图，我正在得到上面的标题错误。 请帮帮我。
主要活动是 –
package com.expand; import android.app.Activity; import android.os.Bundle; import android.util.DisplayMetrics; import android.util.Log; import android.view.View; import android.widget.ExpandableListView; import android.widget.Toast; public class MyExpandableListViewActivity extends Activity { /** Called when the activity is first created. */ static final String groupElements[]= { "India", "Australia", "England", "South Africa" }; static final String[][] childElements= { { "Sachin Tendulkar", "Raina", "Dhoni", "Yuvi" }, { "Ponting", "Adam Gilchrist", "Michael Clarke" }, { "Andrew Strauss", "kevin Peterson", "Nasser Hussain" }, { "Graeme Smith", "AB de villiers", "Jacques Kallis" } }; DisplayMetrics metrics; int width; ExpandableListView expandList; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); expandList = (ExpandableListView)findViewById(R.id.expandList1); metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics); width = metrics.widthPixels; //ExpAdapter adapter = new ExpAdapter(MyExpandableListViewActivity.this, groupElements, childElements); expandList.setAdapter(new ExpAdapter(MyExpandableListViewActivity.this, groupElements, childElements)); expandList.setIndicatorBounds(width - GetDipsFromPixel(50), width - GetDipsFromPixel(10)); expandList.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() { @Override public void onGroupExpand(int groupPosition) { // TODO Auto-generated method stub Log.e("onGroupExpand", "OK"); } }); expandList.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() { @Override public void onGroupCollapse(int groupPosition) { // TODO Auto-generated method stub Log.e("onGroupCollapse", "OK"); } }); expandList.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { //getting the item that is selected //String s = (String) expandList.getItemAtPosition((int) id); Toast.makeText(MyExpandableListViewActivity.this, "You have selected :" , Toast.LENGTH_SHORT).show(); return false; } }); } public int GetDipsFromPixel(float pixels) { // Get the screen's density scale final float scale = getResources().getDisplayMetrics().density; // Convert the dps to pixels, based on density scale return (int) (pixels * scale + 0.5f); } } ExpAdapter类是 – 我已经在其他类中实现了适配器，并在mt主要活动中调用它
package com.expand; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.TextView; public class ExpAdapter extends BaseExpandableListAdapter { public Context myContext; public String[][] childElements; TextView childValues; public String[] groupElements; public ExpAdapter(Context context, String[] group, String[][] childs) { this.myContext=context; this.groupElements = group; this.childElements = childs; } @Override public Object getChild(int groupPosition, int childPosition) { // TODO Auto-generated method stub return childElements[groupPosition][childPosition]; } @Override public long getChildId(int groupPosition, int childPosition) { // TODO Auto-generated method stub return 0; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if(convertView==null){ LayoutInflater inflator = (LayoutInflater)myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflator.inflate(R.layout.child_rows, parent); } childValues = (TextView)convertView.findViewById(R.id.rowValues); childValues.setText(childElements[groupPosition][childPosition]); return convertView; } @Override public int getChildrenCount(int groupPosition) { // TODO Auto-generated method stub return groupElements[groupPosition].length(); } @Override public Object getGroup(int groupPosition) { // TODO Auto-generated method stub return groupElements[groupPosition]; } @Override public int getGroupCount() { // TODO Auto-generated method stub return groupElements.length; } @Override public long getGroupId(int groupPosition) { // TODO Auto-generated method stub return 0; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if(convertView==null){ LayoutInflater inflator = (LayoutInflater)myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflator.inflate(R.layout.group_rows, null); } TextView group = (TextView)convertView.findViewById(R.id.groupId); group.setText(groupElements[groupPosition]); return convertView; } @Override public boolean hasStableIds() { // TODO Auto-generated method stub return false; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return true; } }
main.xml-
这是主要活动首先显示的xnl
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <ExpandableListView android:id="@+id/expandList1" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:id="@+id/android:empty" android:layout_width="fill_parent" android:layout_height="fill_parent" > </TextView> </ExpandableListView> </LinearLayout>
group_row.xml
这是组元素的xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/gropu_name" android:layout_width="fill_parent" android:layout_height="40dp" android:orientation="vertical" > <TextView android:id="@+id/groupId" android:layout_height="40dp" android:layout_width="wrap_content" android:paddingLeft="30dp" android:gravity="center_vertical" android:textSize="16dp" android:textStyle="bold" /> </LinearLayout>
child_row.xml这是子元素的xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="40dp" android:orientation="horizontal" > <TextView android:id="@+id/rowValues" android:layout_width="wrap_content" android:layout_height="30dp" android:gravity="center_vertical" android:paddingLeft="50dp" android:textSize="12dp" /> </LinearLayout>
好像Adapterview不允许添加新的视图，我遇到了同样的问题
通过replace以下行解决它
convertView = inflator.inflate(R.layout.child_rows, parent);
至
convertView = inflator.inflate(R.layout.child_rows, null);
请注意，当您的布局xml无效时，您也可能会遇到此错误。
如上所述，
根本不用父母，你应该简单地告诉Inflater不要把膨胀的视图附加到父母身上
convertView = inflator.inflate(R.layout.child_rows, parent, false);
另请参阅此答案 。
原因是适配器负责将视图附加到父项本身。
根据Android Lint，您的子视图应始终在充气时提供对其父视图的引用。 我的代码中有完全相同的错误。 发生是因为TextView被放置在ExpandableListView中。 当我重新安排我的XML布局错误停止出现。
即时运行function也可能导致此错误。 我正在研究listview，因为这个错误应用程序不断崩溃。 卸载应用程序并再次运行解决了错误。
