国产探花免费观看_亚洲丰满少妇自慰呻吟_97日韩有码在线_资源在线日韩欧美_一区二区精品毛片,辰东完美世界有声小说,欢乐颂第一季,yy玄幻小说排行榜完本

首頁 > 系統 > Android > 正文

Android實現輪播效果的兩種方法

2019-12-12 03:49:48
字體:
來源:轉載
供稿:網友

實現輪播效果有2種方法:

(1)使用ViewPager+ImageView,通過Handler進行間隔發送消息,實現自動輪播效果

xml代碼:

<android.support.v4.view.ViewPager    android:id="@+id/fragment_viewPager"    android:layout_width="match_parent"    android:layout_height="200dp" />
 private Handler handler=new Handler(){    @Override    public void handleMessage(Message msg) {      super.handleMessage(msg);      list= (List<BannerBean>) msg.obj;      //進行下載圖片      for (int i = 0; i < 3; i++) {        Picasso.with(getActivity()).load(list.get(i).getImgs()).resize(640,400).into(imgs.get(i));      }      //展示圖片      MyAdapter adapter=new MyAdapter();      viewPager.setAdapter(adapter);    }  };  private Handler handler2=new Handler(){    @Override    public void handleMessage(Message msg) {      super.handleMessage(msg);      //獲取當前viewPager的位置      int pos=viewPager.getCurrentItem();      //如果是最后一張圖片就進行設置為第一張,實現循環      if(pos==imgs.size()-1){        pos=0;       //否則進行下一張圖片展示      }else{        pos++;      }      //設置viewPager的位置      viewPager.setCurrentItem(pos);      //定時發送消息      handler2.sendEmptyMessageDelayed(1,2000);    }  };   @Override  public View onCreateView(LayoutInflater inflater, ViewGroup container,               Bundle savedInstanceState) {    View view=inflater.inflate(R.layout.fragment_recreation, container, false);    initview(view);    load();    //發送消息給handler2,實現自動輪播    handler2.sendEmptyMessageDelayed(1,2000);    initListener();    return view;  }   private void load() {    //下載圖片地址    new Thread(){      @Override      public void run() {        super.run();        String json= Utils.getJsonFromNet(ContentUrls.headLine_head+0);        if(!TextUtils.isEmpty(json)){          List<BannerBean>data= ParserBanner.getData(json);          Message msg=new Message();          msg.obj=data;          handler.sendMessage(msg);        }      }    }.start();    data=new ArrayList<>();    headlineAdapter=new HeadlineAdapter(data,getActivity());    lv.setAdapter(headlineAdapter);    new MyAsyncTask(data,headlineAdapter).execute(ContentUrls.headLine_head+num);  }  private void initview(View view) {    lv = ((ListView) view.findViewById(R.id.lv));    headerView = LayoutInflater.from(getActivity()).inflate(R.layout.header_layout,null,false);    viewPager = ((ViewPager)headerView.findViewById(R.id.fragment_viewPager));    lv.addHeaderView(headerView);    list=new ArrayList<>();    imgs=new ArrayList<>();    for (int i = 0; i < 3; i++) {      ImageView iv=new ImageView(getActivity());      imgs.add(iv);    }  }

adapter:

 class MyAdapter extends PagerAdapter{    @Override    public int getCount() {      return imgs.size();    }    @Override    public boolean isViewFromObject(View view, Object object) {      return view==object;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {      container.addView(imgs.get(position));      return imgs.get(position);    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {//      super.destroyItem(container, position, object);      container.removeView(imgs.get(position));    }  }

(2)使用SliderLayout第三方進行實現輪播

添加依賴:

  compile 'com.squareup.picasso:picasso:2.5.2'  compile 'com.daimajia.slider:library:1.1.5@aar'  compile 'com.nineoldandroids:library:2.4.0'

xml代碼:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent">  <com.daimajia.slider.library.SliderLayout    android:id="@+id/header_slider"    android:layout_width="match_parent"    android:layout_height="160dp"></com.daimajia.slider.library.SliderLayout></LinearLayout>

Java代碼:

private ListView lv;  private String[] title={"煙","超標","標準","審車合格"};  private int[] imgs={R.mipmap.a,R.mipmap.b,R.mipmap.c,R.mipmap.d};  private SliderLayout slider; @Override  public View onCreateView(LayoutInflater inflater, ViewGroup container,               Bundle savedInstanceState) {    View view=inflater.inflate(R.layout.fragment_home_page, container, false);    lv = ((ListView) view.findViewById(R.id.homePage_lv));    View headerView=LayoutInflater.from(getActivity()).inflate(R.layout.header_layout,null,false);    slider = ((SliderLayout) headerView.findViewById(R.id.header_slider));    lv.addHeaderView(headerView);    initSlider();    initData();    return view;  }  private void initSlider() {    for (int i = 0; i < 4; i++) {      TextSliderView textSlider=new TextSliderView(getActivity());      textSlider.image(imgs[i]).description(title[i]);      slider.addSlider(textSlider);      textSlider.setOnSliderClickListener(new BaseSliderView.OnSliderClickListener() {        @Override        public void onSliderClick(BaseSliderView slider) {          Toast.makeText(getActivity(),slider.getDescription(),Toast.LENGTH_SHORT).show();        }      });    }  }

以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持武林網。

發表評論 共有條評論
用戶名: 密碼:
驗證碼: 匿名發表
主站蜘蛛池模板: 永春县| 顺义区| 合作市| 北宁市| 自贡市| 浏阳市| 扶余县| 重庆市| 祥云县| 出国| 淳安县| 五河县| 丰城市| 上林县| 江津市| 淮阳县| 乳山市| 夏津县| 万荣县| 墨脱县| 平山县| 富顺县| 平定县| 西畴县| 宿州市| 鸡泽县| 古浪县| 德化县| 兰溪市| 石阡县| 玛纳斯县| 衡东县| 怀化市| 札达县| 集安市| 托克逊县| 岳阳县| 开江县| 灵丘县| 大兴区| 湘西|