【Android】自定义可扩展列表ExpandableListView

package cn.etzmico.expandablelistview; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.TextView; import java.util.List; import java.util.Map; public class MyExpandableListAdapter extends BaseExpandableListAdapter { private ViewBinder mViewBinder; private List<? extends Map<String, ?>> mGroupData; private int mExpandedGroupLayout; private int mCollapsedGroupLayout; private String[] mGroupFrom; private int[] mGroupTo; private List<? extends List<? extends Map<String, ?>>> mChildData; private int mChildLayout; private int mLastChildLayout; private String[] mChildFrom; private int[] mChildTo; private LayoutInflater mInflater; public MyExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int groupLayout, String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout, String[] childFrom, int[] childTo) { this(context, groupData, groupLayout, groupLayout, groupFrom, groupTo, childData, childLayout, childLayout, childFrom, childTo); } public MyExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int expandedGroupLayout, int collapsedGroupLayout, String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout, String[] childFrom, int[] childTo) { this(context, groupData, expandedGroupLayout, collapsedGroupLayout, groupFrom, groupTo, childData, childLayout, childLayout, childFrom, childTo); } public MyExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int expandedGroupLayout, int collapsedGroupLayout, String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout, int lastChildLayout, String[] childFrom, int[] childTo) { mGroupData = groupData; mExpandedGroupLayout = expandedGroupLayout; mCollapsedGroupLayout = collapsedGroupLayout; mGroupFrom = groupFrom; mGroupTo = groupTo; mChildData = childData; mChildLayout = childLayout; mLastChildLayout = lastChildLayout; mChildFrom = childFrom; mChildTo = childTo; mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } public Object getChild(int groupPosition, int childPosition) { return mChildData.get(groupPosition).get(childPosition); } public long getChildId(int groupPosition, int childPosition) { return childPosition; } /** * Instantiates a new View for a child. * @param isLastChild Whether the child is the last child within its group. * @param parent The eventual parent of this new View. * @return A new child View */ public View newChildView(boolean isLastChild, ViewGroup parent) { return mInflater.inflate((isLastChild) ? mLastChildLayout : mChildLayout, parent, false); } public int getChildrenCount(int groupPosition) { return mChildData.get(groupPosition).size(); } public Object getGroup(int groupPosition) { return mGroupData.get(groupPosition); } public int getGroupCount() { return mGroupData.size(); } public long getGroupId(int groupPosition) { return groupPosition; } /** * Instantiates a new View for a group. * @param isExpanded Whether the group is currently expanded. * @param parent The eventual parent of this new View. * @return A new group View */ public View newGroupView(boolean isExpanded, ViewGroup parent) { return mInflater.inflate((isExpanded) ? mExpandedGroupLayout : mCollapsedGroupLayout, parent, false); } public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } public boolean hasStableIds() { return true; } // --------------------------------------------------------------------------------------// private void bindView(View view, Map<String, ?> data, String[] from, int[] to) { int len = to.length; boolean isBound = false; for (int i = 0; i < len; i++) { final View v = view.findViewById(to[i]); if (v!=null) { final Object _data = data.get(from[i]); String text = _data == null ? "" : data.toString(); if (text == null) { text = ""; } if (mViewBinder != null) {//���Binder��Ϊ��,ʹ��Binder���д��� isBound = mViewBinder.setViewValue(v, data.get(from[i]), text); } if (!isBound) {//���Binder���,ʹ��ԭ���ķ������д��� TextView _v = (TextView)v; _v.setText((String)data.get(from[i])); } } } } public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { View v; if (convertView == null) { v = newGroupView(isExpanded, parent); } else { v = convertView; } bindView(v, mGroupData.get(groupPosition), mGroupFrom, mGroupTo); return v; } public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { View v; if (convertView == null) { v = newChildView(isLastChild, parent); } else { v = convertView; } bindView(v, mChildData.get(groupPosition).get(childPosition), mChildFrom, mChildTo); return v; } public void setViewBinder(ViewBinder mViewBinder) { this.mViewBinder = mViewBinder; } /** * �ṩ��ͼ��Ⱦ�İ��� * @author Atomic */ public static interface ViewBinder { boolean setViewValue(View view, Object data, String textRepresentation); } // private View createViewFromResource(int position, View convertView, // ViewGroup parent, int resource) { // View v; // if (convertView == null) { // v = mInflater.inflate(resource, parent, false); // } else { // v = convertView; // } // // bindView(position, v); // // return v; // } // private void bindView(int position, View view) { // final Map dataSet = mData.get(position); // if (dataSet == null) { // return; // } // // final ViewBinder binder = mViewBinder; // final String[] from = mFrom; // final int[] to = mTo; // final int count = to.length; // // for (int i = 0; i < count; i++) { // final View v = view.findViewById(to[i]); // if (v != null) { // final Object data = dataSet.get(from[i]); // String text = data == null ? "" : data.toString(); // if (text == null) { // text = ""; // } // // boolean bound = false; // if (binder != null) { // bound = binder.setViewValue(v, data, text); // } // // if (!bound) { // if (v instanceof Checkable) { // if (data instanceof Boolean) { // ((Checkable) v).setChecked((Boolean) data); // } else if (v instanceof TextView) { // // Note: keep the instanceof TextView check at the bottom of these // // ifs since a lot of views are TextViews (e.g. CheckBoxes). // setViewText((TextView) v, text); // } else { // throw new IllegalStateException(v.getClass().getName() + // " should be bound to a Boolean, not a " + // (data == null ? "<unknown type>" : data.getClass())); // } // } else if (v instanceof TextView) { // // Note: keep the instanceof TextView check at the bottom of these // // ifs since a lot of views are TextViews (e.g. CheckBoxes). // setViewText((TextView) v, text); // } else if (v instanceof ImageView) { // if (data instanceof Integer) { // setViewImage((ImageView) v, (Integer) data); // } else { // setViewImage((ImageView) v, text); // } // } else { // throw new IllegalStateException(v.getClass().getName() + " is not a " + // " view that can be bounds by this SimpleAdapter"); // } // } // } // } // } }