案例:怎么样在一个ListView中含有TextView的item中实现字母滚动呢。这个在一些特定的场合经常用得到。如下图,当焦点位于某个item的时候其内容就自动滚动显示
要实现这样的效果,废话不多说直接上代码:
adapter对应的layout
对应的listView的layout
切记千万不要在TextView中加上android:focusable="true"
- <LinearLayout android:orientation="vertical"
- android:layout_width="fill_parent" android:layout_height="wrap_content"
- xmlns:android="http://schemas.android.com/apk/res/android">
- <RelativeLayout android:gravity="center_vertical"
- android:orientation="horizontal" android:layout_width="fill_parent"
- android:layout_height="32.0dip">
- <TextView android:textSize="16dip" android:gravity="center"
- android:id="@+id/list_live_content_time" android:layout_width="56dip"
- android:layout_height="fill_parent" />
- <TextView android:textSize="16dip" android:ellipsize="marquee"
- android:id="@+id/list_live_content_programm" android:layout_width="260dip"
- android:layout_height="fill_parent" android:singleLine="true"
- android:layout_toRightOf="@id/list_live_content_time" />
- </RelativeLayout>
- </LinearLayout>
man.xml
如下红色字体 一定要加上 android:focusable="true"
- <!--如下红色字体 一定要加上 android:focusable="true" -->
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical" android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <TextView android:layout_width="fill_parent"
- android:layout_height="wrap_content" android:text="@string/hello" />
- <ListView android:id="@+id/list" android:layout_height="wrap_content"
- android:layout_width="fill_parent" android:focusable="true"
- android:background="@android:color/transparent"></ListView>
- </LinearLayout>
主类代码:ListViewItemActivity。java
- package com.jzh.testitem;
- import java.util.ArrayList;
- import java.util.List;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.View;
- import android.widget.AdapterView;
- import android.widget.AdapterView.OnItemClickListener;
- import android.widget.ListView;
- public class ListViewItemActivity extends Activity {
- /** Called when the activity is first created. */
- private ListItemAdapter adapter;
- private List<Channel> list;
- private ListView channelList;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- channelList = (ListView) findViewById(R.id.list);
- list = new ArrayList<Channel>();
- list.add(new Channel(
- "9:12",
- "那些流逝的时光我想和电影里一样对你说--我爱你,我爱你,我爱你..光影世界的我爱你。一次一次,我不厌其烦地切回那个镜头,找到你最深情的一刻,复制这句不能再普通不能再庸俗的话语。而你,屡屡感动我在冰冷的屏幕前。"));
- list.add(new Channel("10:35", "A不喜欢吃鸡蛋,每次发了鸡蛋都给B吃。"));
- list.add(new Channel("12:55",
- "A不喜欢吃鸡蛋,每次发了鸡蛋都给B吃。刚开始B很感谢,久而久之便习惯了。习惯了,便理所当然了"));
- list.add(new Channel(
- "14:30",
- "于是,直到有一天,A将鸡蛋给了C,B就不爽了。她忘记了这个鸡蛋本来就是A的,A想给谁都可以。为此,她们大吵一架,从此绝交。其实,不是别人不好了,而是我们的要求变多了。习惯了得到,便忘记了感恩。"));
- adapter = new ListItemAdapter(this.getApplicationContext(), list);
- channelList.setAdapter(adapter);
- channelList.setOnItemClickListener(new OnItemClickListener() {
- @Override
- public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
- long arg3) {
- adapter.setIndex(arg2);
- adapter.notifyDataSetChanged();
- }
- });
- }
- }
adapter类代码: ListItemAdapter.java
注意下面加注释的两行代码一定要设置你的textView的setSelected(true);
- package com.jzh.testitem;
- import java.util.List;
- import android.content.Context;
- import android.graphics.Color;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.BaseAdapter;
- import android.widget.TextView;
- public class ListItemAdapter extends BaseAdapter {
- private LayoutInflater inflater;
- private List<Channel> items;
- private int index = 0;
- public ListItemAdapter(Context context, List<Channel> items) {
- super();
- this.inflater = LayoutInflater.from(context);
- this.items = items;
- }
- public void setIndex(int selected) {
- index = selected;
- }
- @Override
- public int getCount() {
- // TODO Auto-generated method stub
- return items.size();
- }
- @Override
- public Object getItem(int position) {
- // TODO Auto-generated method stub
- return items.get(position);
- }
- @Override
- public long getItemId(int position) {
- // TODO Auto-generated method stub
- return position;
- }
- @Override
- public View getView(int position, View convertView, ViewGroup parent) {
- ViewHolder holder;
- if (convertView == null) {
- convertView = inflater.inflate(R.layout.live_content_adapter, null);
- holder = new ViewHolder();
- holder.time_tv = (TextView) convertView
- .findViewById(R.id.list_live_content_time);
- holder.content_tv = (TextView) convertView
- .findViewById(R.id.list_live_content_programm);
- } else {
- holder = (ViewHolder) convertView.getTag();
- }
- if (index == position) {
- convertView.setBackgroundColor(Color.GREEN);
- //此处就是设置textview为选中状态,方可以实现效果
- convertView.findViewById(R.id.list_live_content_programm)
- .setSelected(true);
- } else {
- convertView.setBackgroundColor(Color.BLUE);
- //没选中的就不用设置了
- convertView.findViewById(R.id.list_live_content_programm)
- .setSelected(false);
- }
- convertView.setTag(holder);
- holder.time_tv.setText(items.get(position).getLiveTime());
- holder.content_tv.setText(items.get(position).getLiveContent());
- return convertView;
- }
- private class ViewHolder {
- private TextView time_tv;
- private TextView content_tv;
- }
- }
实体类代码Channel.java
- package com.jzh.testitem;
- public class Channel {
- private String liveTime;
- private String liveContent;
- public Channel(String liveTime, String liveContent) {
- super();
- this.liveTime = liveTime;
- this.liveContent = liveContent;
- }
- public String getLiveTime() {
- return liveTime;
- }
- public String getLiveContent() {
- return liveContent;
- }
- }
这篇文章是我转载的 这个人的 http://blog.csdn.net/jzh2012/article/details/6885204
大家可以看看,其实我最后找到了比较简单的相对来说你可以在 item的里面设置TextView的属性,至少我先在认为的几个不可或去的
大家可以看看,其实我最后找到了比较简单的相对来说你可以在 item的里面设置TextView的属性,至少我先在认为的几个不可或去的
[java] view
plaincopy
plaincopy
- <TextView android:id="@+id/app_loc"
- android:layout_width="120dip"
- android:layout_height="wrap_content"
- android:textColor="#000000"
- android:textSize="12dp"
- android:layout_marginLeft="10dip"
- android:focusableInTouchMode="true"
- android:ellipsize="marquee"
- android:scrollHorizontally="true"
- android:marqueeRepeatLimit="marquee_forever"></TextView>
可以参考我的一下....然后 如果想不获取焦点就让TextView 的跑马灯效果 直接在自定义adapter中setView方法找到 该TextView 并设置 成convertView.findViewById(R.id.app_loc)
.setSelected(true);