Android 水平的ListView

Android Horizontal ListView

Posted by paul on March 7, 2011

Android 水平的ListView_第1张图片

Due popularity, I have decided to create a GitHub repo for this project. Please checkout the code at: http://github.com/dinocore1/Android-Horizontal-ListView Pull requests are welcome!

The Android API seems to be lacking a Horizontal ListView widget. Basically, what I needed was something exactly like the Gallery widget but without the center-locking feature. After much googling (and finding dead ends like this or this), I eventually came to the conclusion that a Horizontal ListView simply did not exist. So I built my own…

My Android Horizontal ListView implementation has the following features:

Subclass AdapterView so I can make use of adapters
Fast – make use of recycled views when possible
Items are clickable – (accepts AdapterView.OnItemClickListener)
Scrollable
No center-locking
Simple – is that so much to ask?

If you find this helpful, let me know, I would love to hear your feedback.

How to use:
Horizontal ListView is ment to be a drop-in replacement for a standard ListView. Here is some quick demo code to get you started:

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packagecom.devsmart.android.test;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.BaseAdapter;
importandroid.widget.TextView;
importcom.devsmart.android.ui.HorizontialListView;
publicclassHorizontalListViewDemoextendsActivity{
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.listviewdemo);
HorizontialListViewlistview=(HorizontialListView)findViewById(R.id.listview);
listview.setAdapter(mAdapter);
}
privatestaticString[]dataObjects=newString[]{"Text#1",
"Text#2",
"Text#3"};
privateBaseAdaptermAdapter=newBaseAdapter(){
@Override
publicintgetCount(){
returndataObjects.length;
}
@Override
publicObjectgetItem(intposition){
returnnull;
}
@Override
publiclonggetItemId(intposition){
return0;
}
@Override
publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
Viewretval=LayoutInflater.from(parent.getContext()).inflate(R.layout.viewitem,null);
TextViewtitle=(TextView)retval.findViewById(R.id.title);
title.setText(dataObjects[position]);
returnretval;
}
};
}

res/layout/listviewdemo.xml:

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<linearlayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"android:background="#fff">
<com.devsmart.android.ui.horizontiallistviewandroid:id="@+id/listview"android:layout_width="fill_parent"android:layout_height="wrap_content"android:background="#ddd">
</com.devsmart.android.ui.horizontiallistview></linearlayout>

res/layout/listitem.xml:

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<linearlayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="#fff">
<imageviewandroid:id="@+id/image"android:layout_width="150dip"android:layout_height="150dip"android:scaletype="centerCrop"android:src="@drawable/icon">
<textviewandroid:id="@+id/title"android:layout_width="fill_parent"android:layout_height="wrap_content"android:textcolor="#000"android:gravity="center_horizontal">
</textview></imageview></linearlayout>

Download code here Horizontal Listview (1931)

Changelist
1.5:
adapter.notifyDataSetChanged() now saves position in list instead of starting at begining

1.4:
Added code to respond to adapter.notifyDataSetChanged()

1.3:
added mScroller.forceFinished(true); to the onDown function of mOnGesture so the user con stop the scroll on tap.

Android Horizontal ListView

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