1、爲了實現兩列的ListView
首先我們需要定義一個每一項的佈局文件music_find_music_menu_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginRight="10dp"
android:layout_weight="1">
<RelativeLayout
android:id="@+id/music_menu_image_left"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="4"
android:visibility="invisible"
android:background="@drawable/ic_launcher">
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="6">
</LinearLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="4">
<TextView
android:id="@+id/listen_timer_left"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:gravity="center_vertical"
android:text="1231313113"/>
<ImageView
android:id="@+id/ear_phone_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/listen_timer_left"
android:src="@drawable/ic_launcher"/>
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_height="30dp">
<ImageView
android:id="@+id/user_image_icon_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher"/>
<TextView
android:id="@+id/music_menu_owner_left"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:layout_toRightOf="@id/user_image_icon_left"
android:text="123131231"/>
</RelativeLayout>
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="@+id/music_menu_title_left"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginRight="10dp"
android:layout_weight="1">
<RelativeLayout
android:id="@+id/music_menu_image_right"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="4"
android:visibility="invisible"
android:background="@drawable/ic_launcher">
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="6">
</LinearLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="4">
<TextView
android:id="@+id/listen_timer_right"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:gravity="center_vertical"
android:text="1231313113"/>
<ImageView
android:id="@+id/ear_phone_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/listen_timer_right"
android:src="@drawable/ic_launcher"/>
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_height="30dp">
<ImageView
android:id="@+id/user_image_icon_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher"/>
<TextView
android:id="@+id/music_menu_owner_right"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:layout_toRightOf="@id/user_image_icon_right"
android:text="123131231"/>
</RelativeLayout>
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="@+id/music_menu_title_right"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</LinearLayout>
</LinearLayout>2、自定義ListAdapter
我們需要自定義一個ListAdapter,並且這個ListAdapt繼承自BaseAdapter
public class MusicMenuListAdapter extends BaseAdapter {
private Context mContext;
private List<MusicMenuBean> beans;
public MusicMenuListAdapter(List<MusicMenuBean> beans, Context mContext) {
this.beans = beans;
this.mContext = mContext;
}
@Override
public int getCount() {
if(beans == null) {
return 0;
}
return beans.size()/2 + beans.size()%2;
}
@Override
public Object getItem(int position) {
return beans.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(beans == null) {
return null;
}
if(convertView == null) {
MusicMenuView view = new MusicMenuView(this.mContext);
if(beans.size()%2!=0&&position == getCount() - 1) {
view.update(beans.get(2 * position));
}else {
view.update(beans.get(2 * position),beans.get(2 * position + 1));
}
convertView = view;
}else {
((MusicMenuView)convertView).update(beans.get(position),beans.get(position + 1));
}
return convertView;
}
class MusicMenuView extends LinearLayout {
private Context mContext;
private RelativeLayout leftLayout;
private RelativeLayout rightLayout;
private TextView leftListenTime,rightListenTime,leftOwnerName,
rightOwnerName,leftMenuTitle,rightMenuTitle;
public MusicMenuView(Context context) {
super(context);
this.mContext = context;
View view = LayoutInflater.from(this.mContext).inflate(R.layout.music_find_music_menu_item,null);
leftLayout = (RelativeLayout) view.findViewById(R.id.music_menu_image_left);
leftListenTime = (TextView) view.findViewById(R.id.listen_timer_left);
leftOwnerName = (TextView) view.findViewById(R.id.music_menu_owner_left);
leftMenuTitle = (TextView) view.findViewById(R.id.music_menu_title_left);
rightLayout = (RelativeLayout) view.findViewById(R.id.music_menu_image_right);
rightListenTime = (TextView) view.findViewById(R.id.listen_timer_right);
rightOwnerName = (TextView) view.findViewById(R.id.music_menu_owner_right);
rightMenuTitle = (TextView) view.findViewById(R.id.music_menu_title_right);
leftLayout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext,"left",Toast.LENGTH_LONG).show();
}
});
rightLayout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext,"right",Toast.LENGTH_LONG).show();
}
});
addView(view);
}
public void update(MusicMenuBean leftBean){
leftLayout.setBackgroundResource(R.drawable.ic_launcher);
leftListenTime.setText(leftBean.getListenTime());
leftOwnerName.setText(leftBean.getMenuOwner());
leftMenuTitle.setText(leftBean.getMenuTitle());
leftLayout.setVisibility(VISIBLE);
}
public void update(MusicMenuBean leftBean,MusicMenuBean rightBean){
leftLayout.setBackgroundResource(R.drawable.ic_launcher);
leftListenTime.setText(leftBean.getListenTime());
leftOwnerName.setText(leftBean.getMenuOwner());
leftMenuTitle.setText(leftBean.getMenuTitle());
rightLayout.setBackgroundResource(R.drawable.ic_launcher);
rightListenTime.setText(rightBean.getListenTime());
rightOwnerName.setText(rightBean.getMenuOwner());
rightMenuTitle.setText(rightBean.getMenuTitle());
leftLayout.setVisibility(VISIBLE);
rightLayout.setVisibility(VISIBLE);
}
}
}3、自定義MyListView
因爲ScrollView和ListView是無法共存的，爲了實現他們的共存，網上有很多方法可以實現，例如繼承ListView等方法，我也試了一下，發現由於getView這個方法在每次加載的時候都需要執行很多次，很大的降低了效率，在頁面切換的時候造成了很大的延時卡頓，效果很差，果斷放棄了這些方法，採用了與ScrollView共存的LinearLayout
/**
* 虛擬listview
*/
public class MyListView extends LinearLayout{
private BaseAdapter adapter;
private MyOnItemClickListener onItemClickListener;
boolean footerViewAttached = false;
private View footerview;
private int width = 0;
/**
* 通知更新listview
*/
public void notifyChange() {
int count = getChildCount();
if (footerViewAttached) {
count--;
}
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, width);
for (int i = count; i < adapter.getCount(); i++) {
final int index = i;
final LinearLayout layout = new LinearLayout(getContext());
layout.setLayoutParams(params);
layout.setOrientation(VERTICAL);
View v = adapter.getView(i, null, null);
v.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (onItemClickListener != null) {
onItemClickListener.onItemClick(MyListView.this, layout, index,
adapter.getItem(index));
}
}
});
ImageView imageView = new ImageView(getContext());
imageView.setLayoutParams(params);
layout.addView(v);
layout.addView(imageView);
addView(layout, index);
}
}
public MyListView(Context context) {
super(context);
initAttr(null);
}
public MyListView(Context context, AttributeSet attrs) {
super(context, attrs);
initAttr(attrs);
}
public void initAttr(AttributeSet attrs) {
setOrientation(VERTICAL);
WindowManager wm = (WindowManager) getContext()
.getSystemService(Context.WINDOW_SERVICE);
width = wm.getDefaultDisplay().getWidth()/2;
}
/**
* 初始化footerview
*
* @param footerView
*/
public void initFooterView(final View footerView) {
this.footerview = footerView;
}
/**
* 設置footerView監聽事件
*
* @param onClickListener
*/
public void setFooterViewListener(OnClickListener onClickListener) {
this.footerview.setOnClickListener(onClickListener);
}
public BaseAdapter getAdapter() {
return adapter;
}
/**
* 設置adapter並模擬listview添加數據
*
* @param adpater
*/
public void setAdapter(BaseAdapter adpater) {
this.adapter = adpater;
removeAllViews();
if (footerViewAttached)
addView(footerview);
notifyChange();
}
/**
* 設置條目監聽事件
*
* @param onClickListener
*/
public void setOnItemClickListener(MyOnItemClickListener onClickListener) {
this.onItemClickListener = onClickListener;
}
/**
* 沒有下一頁了
*/
public void noMorePages() {
if (footerview != null && footerViewAttached) {
removeView(footerview);
footerViewAttached = false;
}
}
/**
* 可能還有下一??
*/
public void mayHaveMorePages() {
if (!footerViewAttached && footerview != null) {
addView(footerview);
footerViewAttached = true;
}
}
public static interface MyOnItemClickListener {
public void onItemClick(ViewGroup parent, View view, int position, Object o);
}
}4、在Activity或則Fragment中實現一下代碼
menusList = (MyListView) view.findViewById(R.id.music_menu_list);
menusList.setAdapter(new MusicMenuListAdapter(beans,getActivity()));
ScrollView scrollView = (ScrollView) view.findViewById(R.id.music_menu_scroll_view);
scrollView.scrollTo(0,0);
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