上滑动改变头部，仿支付宝头部变化，解决ScrollView与listView冲突问题

来源：互联网发布：下载哈萨克dombira软件编辑：程序博客网时间：2024/05/21 07:56
为了快速实现，请看图，看代码，关键点在实现ScrollView 的onScrollChanged() 方法import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.LinearLayout;import android.widget.RelativeLayout;import android.widget.ScrollView;import java.util.ArrayList;import java.util.List;/** * @author lxs * @date :2017/4/13 * @Description: */public class MainActivity extends AppCompatActivity {    private List<String> list = new ArrayList<String>();    private ListviewDataAdapter listviewDataAdapter;    private PayScrollView payScrollView;    private ListViewForScrollView listView;    private RelativeLayout header_rl;    private LinearLayout header_il, header_sheliang_ll;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        listView = (ListViewForScrollView) findViewById(R.id.list_v);        listView.setFocusable(false);        payScrollView = (PayScrollView) findViewById(R.id.scroll_v);        header_rl = (RelativeLayout) findViewById(R.id.header_rl);        header_il = (LinearLayout) findViewById(R.id.header_il);        header_sheliang_ll = (LinearLayout) findViewById(R.id.header_sheliang_ll);        payScrollView.setOnScrollChangedListeners(new PayScrollView.OnScrollChangedListener() {            @Override            public void onScrollChanged(ScrollView who, int l, int t, int oldl, int oldt) {                if (t > header_sheliang_ll.getHeight() / 2 * 3) {                    header_il.setVisibility(View.VISIBLE);                    header_rl.setVisibility(View.GONE);                } else if (t < header_sheliang_ll.getHeight() / 2) {                    header_il.setVisibility(View.GONE);                    header_rl.setVisibility(View.VISIBLE);                }            }        });        getData(true);    }    private void getData(boolean falge) {        if (falge) {            for (int i = 0; i < 50; i++) {                list.add("张三" + i);            }            listviewDataAdapter = new ListviewDataAdapter(list, this);            listView.setAdapter(listviewDataAdapter);        }    }}import android.content.Context;import android.util.AttributeSet;import android.widget.ScrollView;/** * @author lxs * @date 创建时间 : 2017/4/10 * @Description: */public class PayScrollView extends ScrollView{    public interface OnScrollChangedListener {        void onScrollChanged(ScrollView who, int l, int t, int oldl, int oldt);    }    private OnScrollChangedListener mOnScrollChangedListener;    public PayScrollView(Context context) {        super(context);    }    public PayScrollView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public PayScrollView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    @Override    protected void onScrollChanged(int l, int t, int oldl, int oldt) {        super.onScrollChanged(l, t, oldl, oldt);        if (mOnScrollChangedListener != null) {            mOnScrollChangedListener.onScrollChanged(this, l, t, oldl, oldt);        }    }    public void setOnScrollChangedListeners(OnScrollChangedListener listener) {        mOnScrollChangedListener = listener;    }}

下面是实现listview 防止冲突

import android.content.Context;import android.util.AttributeSet;import android.widget.ListView;/** * @author lxs * @date 创建时间 : 2017/4/10 * @Description: */public class ListViewForScrollView extends ListView {    public ListViewForScrollView(Context context, AttributeSet attrs,                                 int defStyle) {        super(context, attrs, defStyle);// TODO Auto-generated constructor stub    }    public ListViewForScrollView(Context context, AttributeSet attrs) {        super(context, attrs);// TODO Auto-generated constructor stub    }    public ListViewForScrollView(Context context) {        super(context);// TODO Auto-generated constructor stub    }    /**     * 重写该方法，达到使ListView适应ScrollView的效果     */    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,                MeasureSpec.AT_MOST);        super.onMeasure(widthMeasureSpec, expandSpec);    }}

效果如下图
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