Android仿淘宝头条滚动广告条
16lz
2021-01-26
之前我使用TextView+Handler+动画,实现了一个简单的仿淘宝广告条的滚动, https://download.csdn.net/download/qq_35605213/9660825; 无意中发现ViewFlipper这个控件,拿来一试;很轻松的就实现了文字的替换功能;
下载地址:点击打开链接
源码:https://github.com/CuiChenbo/UpRollView
代码:
private ViewFlipper vf;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); vf = findViewById(R.id.vf); vf.setFlipInterval(2000);//设置时间间隔 setData();}String datas[] = {"对Kotlin的第一印象" ,"Android.Kotlin的杀手锏" ,"Kotlin很简洁" ,"Kotlin很擅长“拿来主义" ,"其实我也就是走马观花"};private void setData() { for (int i = 0; i < datas.length; i++) { TextView tv = new TextView(this); tv.setText(datas[i]); vf.addView(tv); //把需要滚动布局添加到ViewFlipper } vf.startFlipping(); //开始滚动}
XML布局:
<?xml version="1.0" encoding="utf-8"?>
只不过没有动画的效果,下面我再给它加上从下面滑进来和向上滑出去的动画;
<?xml version="1.0" encoding="utf-8"?> <?xml version="1.0" encoding="utf-8"?> vf.setInAnimation(this,R.anim.in); //设置动画效果vf.setOutAnimation(this,R.anim.out);
哈哈,这下效果就很像了;
不过淘宝是双条的,这个怎么实现呢?
private ViewFlipper vf;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); vf = findViewById(R.id.vf); vf.setFlipInterval(2000);//设置时间间隔 vf.setInAnimation(this,R.anim.in); vf.setOutAnimation(this,R.anim.out); setData();}String datas[] = {"鹿皮绒高腰小西装裤子女九分阔腿裤侧边条纹" ,"显瘦休闲运动裤女春秋薄款直筒长裤宽松卫裤" ,"春季浅色格子裤女九分裤松紧腰捆绳宽松显瘦千鸟格哈伦休闲裤" ,"秋冬新款宽松毛呢小脚哈伦裤休闲裤女显瘦呢子长裤加厚款大码潮" ,"春秋季新款心型碎花松紧腰长袖中长款连衣裙女宽松显瘦波点裙" ,"运动服套装女春秋时尚2018新款修身韩版卫衣春季休闲跑步两件套潮" ,"职业装女装套装时尚西装连衣裙ol气质工作服女春秋正装套装裙" ,"秋季卫衣女韩版学生百搭上衣宽松显瘦连帽2017时尚新款长袖外套潮","2鹿皮绒高腰小西装裤子女九分阔腿裤侧边条纹"};private void setData() { for (int i = 0; i < datas.length; i= i+2) { //一次遍历两条数据 View v = View.inflate(this,R.layout.item,null); TextView tv1 = v.findViewById(R.id.tv1); TextView tv2 = v.findViewById(R.id.tv2); tv1.setText(datas[i]); if (datas.length > i+1){ tv2.setText(datas[i+1]); }else { tv2.setVisibility(View.GONE); } vf.addView(v); //把需要滚动布局添加到ViewFlipper } vf.startFlipping(); //开始滚动}
布局文件:
<?xml version="1.0" encoding="utf-8"?>
很容易看懂的,轻松完成;
属性介绍:
android:autoStart: 设置自动加载下一个View
android:flipInterval:设置View之间切换的时间间隔
android:inAnimation: 设置切换View的进入动画
android:outAnimation:设置切换View的退出动画
方法介绍:
isFlipping: 判断View切换是否正在进行
setFilpInterval:设置View之间切换的时间间隔
startFlipping: 开始View的切换,而且会循环进行
stopFlipping: 停止View的切换
setOutAnimation:设置切换View的退出动画
setInAnimation: 设置切换View的进入动画
showNext: 显示ViewFlipper里的下一个View
showPrevious: 显示ViewFlipper里的上一个View
随便抽取一下,方便使用:
public class UpView extends ViewFlipper { private Context content; public UpView(Context context) { super(context); init(context); } private int Interval = 3000; public UpView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } private void init(Context context) { this.content = context; setFlipInterval(Interval);//设置时间间隔 setInAnimation(context,R.anim.in); setOutAnimation(context,R.anim.out); } public void setInterval(int i){ Interval = i; } /** * 设置循环滚动的View数组 */ public void setViews(final List views) { if (views == null || views.size() == 0) return; removeAllViews(); for ( int i = 0; i < views.size(); i++) { final int finalposition=i; //设置监听回调 views.get(i).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (onItemClickListener != null) { onItemClickListener.onItemClick(finalposition, views.get(finalposition)); } } }); addView(views.get(i)); } startFlipping(); } private OnItemClickListener onItemClickListener; public void setOnItemClickListener(OnItemClickListener onItemClickListener) { this.onItemClickListener = onItemClickListener; } public interface OnItemClickListener { void onItemClick(int position, View view); }}
使用:
public class MainActivity extends AppCompatActivity implements UpView.OnItemClickListener { private UpView vf; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); vf = findViewById(R.id.vf); setData(); vf.setOnItemClickListener(this); } String datas[] = { "鹿皮绒高腰小西装裤子女九分阔腿裤侧边条纹" ,"显瘦休闲运动裤女春秋薄款直筒长裤宽松卫裤" ,"春季浅色格子裤女九分裤松紧腰捆绳宽松显瘦千鸟格哈伦休闲裤" ,"秋冬新款宽松毛呢小脚哈伦裤休闲裤女显瘦呢子长裤加厚款大码潮" ,"春秋季新款心型碎花松紧腰长袖中长款连衣裙女宽松显瘦波点裙" ,"运动服套装女春秋时尚2018新款修身韩版卫衣春季休闲跑步两件套潮" ,"职业装女装套装时尚西装连衣裙ol气质工作服女春秋正装套装裙" ,"秋季卫衣女韩版学生百搭上衣宽松显瘦连帽2017时尚新款长袖外套潮"}; private void setData() { List views = new ArrayList<>(); for (int i = 0; i < datas.length; i= i+2) { //一次遍历两条数据 View v = View.inflate(this,R.layout.item,null); TextView tv1 = v.findViewById(R.id.tv1); TextView tv2 = v.findViewById(R.id.tv2); tv1.setText(datas[i]); if (datas.length > i+1){ tv2.setText(datas[i+1]); }else { tv2.setVisibility(View.GONE); } views.add(v); } vf.setViews(views); } @Override public void onItemClick(int position, View view) { Log.i("TAG",position+""); }}
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