How to implement an Extensible header Control imitating QQ by Android

Editor to share with you how to achieve Android imitating QQ stretchable head control, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

The general idea of the control is:

1. Add the header view by inheriting listview. two。 Monitor listview scrolling. 3. Custom animation springback.

The layout of activity-main.xml is as follows:

Headerview.xml layout:

List_item layout:

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Activity Code:

Package com.example.headerlistview;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.os.Bundle;import android.app.Activity;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.SimpleAdapter;public class MainActivity extends Activity {private HeaderListView header_lv; private ImageView header_iv @ Override protected void onCreate (Bundle savedInstanceState) {super.onCreate (savedInstanceState); setContentView (R.layout.activity_main); getHeaderView (); initView ();} private void initView () {/ / TODO Auto-generated method stub header_lv= (HeaderListView) findViewById (R.id.header_lv); header_lv.addHeaderView (getHeaderView ()); header_lv.setHeaderView (header_iv); header_lv.setAdapter (getSimpleAdapter ());} public BaseAdapter getSimpleAdapter () {List data=new ArrayList (); for (int item0