android开发类似淘宝京东头条的垂直跑马灯效果

在Android中，左右的跑马灯效果非常容易实现，只需要在xml里面设置它的属性就可以了，但是要做到垂直的跑马灯，在xml中设置属性是不能实现的，下面就需要我们自定义textview来实现这个效果。

package com.msstudent.view;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.AnimationUtils;
import android.widget.TextSwitcher;

import com.msstudent.activity.R;
import com.msstudent.entity.SS_noticeBean;

/**
*
* @ClassName: FlipTextView
* @Description: TODO(垂直文本跑马灯)
* @author henry
* @date 2015-11-25 下午5:16:48
*
*/
public class FlipTextView extends TextSwitcher implements TextSwitcher.ViewFactory {

private List<SS_noticeBean> demoBeans = new ArrayList<SS_noticeBean>();
private int mIndex;
private ItemDataListener itemDataListener;
private View view ; //click view
private static final int AUTO_RUN_FLIP_TEXT = 11;
private static final int WAIT_TIME = 3500;

public FlipTextView(Context context) {
super(context);
init();
}

public FlipTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}

private void init(){
setFactory(this);
setInAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.trans_bottom_to_top_in_fast));
setOutAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.trans_bottom_to_top_out_fast));
}

@Override
public View makeView() {
return LayoutInflater.from(getContext()).inflate(R.layout.flip_item_text_view,null);
}

Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
switch (msg.what){
case AUTO_RUN_FLIP_TEXT:
if(demoBeans.size()>0){
mHandler.sendEmptyMessageDelayed(AUTO_RUN_FLIP_TEXT,WAIT_TIME);
setText(demoBeans.get(mIndex).getTitle());
}
mIndex++;
if(mIndex>demoBeans.size()-1){
mIndex=0;
}
view.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
if(mIndex==0){
itemDataListener.onItemClick(demoBeans.size()-1);
}else{
itemDataListener.onItemClick(mIndex-1);
}
}
});
break;
}
}
};

public void setData(List<SS_noticeBean> datas,ItemDataListener listener,View v){
view = v;
itemDataListener = listener;
if(demoBeans.size()>0){
demoBeans.clear();
}
demoBeans.addAll(datas);
mIndex = 0;
mHandler.removeMessages(AUTO_RUN_FLIP_TEXT);
mHandler.sendEmptyMessage(AUTO_RUN_FLIP_TEXT);
}

public abstract interface ItemDataListener{
public void onItemClick(int position);
}
}

然后再xml中引入，在activity中调用setData()即可，这里注意：ll_fliptext是包裹fliptextview的父容器（线性，相对）

private void initData() {
if (demoBeans.get(0).getResult() == null) {
} else {
pmd_tv.setData(demoBeans.get(0).getResult(), itemDataListener, ll_fliptext);
}
}

private FlipTextView.ItemDataListener itemDataListener = new FlipTextView.ItemDataListener() {
@Override
public void onItemClick(int position) {
Intent intent = new Intent(getActivity(),NoticeActivity.class);
startActivity(intent);
}
};