仿QQ好友列表的效果图
xml页面
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <!--运用：如：QQ列表--> <ExpandableListView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/expandablelistview_1"></ExpandableListView> </LinearLayout> Java代码package com.example.app11; import android.database.DataSetObserver; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v7.app.AppCompatActivity; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.ExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; /** * Created by Administrator on 2017/6/8 0008. */ public class ExpandableListViewActivity extends AppCompatActivity { private ExpandableListView expandableListView; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.expandablelistview); expandableListView = (ExpandableListView) findViewById(R.id.expandablelistview_1); expandable expandable=new expandable(); expandableListView.setAdapter(expandable); } class expandable implements ExpandableListAdapter { int logals[] = {R.drawable.dog, R.drawable.elephant, R.drawable.fish}; String names[] = {"狗", "象", "鱼"}; String content[][] = {{"狗1", "狗2", "狗3"}, {"象1", "象2", "象3"}, {"鱼1", "鱼2", "鱼3"}}; @Override public void registerDataSetObserver(DataSetObserver observer) { } @Override public void unregisterDataSetObserver(DataSetObserver observer) { } @Override public int getGroupCount() { return names.length; } @Override public int getChildrenCount(int groupPosition) { return content[groupPosition].length; } @Override public Object getGroup(int groupPosition) { return names[groupPosition]; } @Override public Object getChild(int groupPosition, int childPosition) { return content[groupPosition][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) { LinearLayout ll = new LinearLayout(ExpandableListViewActivity.this); ll.setOrientation(LinearLayout.HORIZONTAL); ImageView logo = new ImageView(ExpandableListViewActivity.this); logo.setImageResource(logals[groupPosition]); logo.setPadding(36, 15, 0, 0); ll.addView(logo); TextView textView=getTextView(); textView.setText(getGroup(groupPosition).toString()); textView.setPadding(10,0,0,0); ll.addView(textView); return ll; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { TextView textView=getTextView(); textView.setText(getChild(groupPosition,childPosition).toString()); return textView; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } @Override public boolean areAllItemsEnabled() { return false; } @Override public boolean isEmpty() { return false; } @Override public void onGroupExpanded(int groupPosition) { } @Override public void onGroupCollapsed(int groupPosition) { } @Override public long getCombinedChildId(long groupId, long childId) { return 0; } @Override public long getCombinedGroupId(long groupId) { return 0; } private TextView getTextView() { AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 64); TextView textView = new TextView(ExpandableListViewActivity.this); textView.setLayoutParams(lp); textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT); textView.setPadding(36, 0, 0, 0); textView.setTextSize(20); return textView; } } }
