前往小程序,Get更优阅读体验!
立即前往
首页
学习
活动
专区
工具
TVP
发布
社区首页 >专栏 >Android自定义图文跑马灯效果

Android自定义图文跑马灯效果

作者头像
砸漏
发布2020-10-16 11:12:24
5660
发布2020-10-16 11:12:24
举报
文章被收录于专栏:恩蓝脚本恩蓝脚本

之前的需求是用FlipperView来实现上下翻动效果,但是发现数据有点长会造成一屏幕放不下三条数据,后来改为跑马灯,但是只有文字的跑马灯TextView自己就有,但是要求文字后面带一个小图标怎们办呢?

(1).MainActivity.java:

代码语言:javascript
复制
public class HomeFragment extends BaseFragment {
  private MarqueeScroll mMarqueeScroll;
  private int[] name_tv = {R.id.name_tv1, R.id.name_tv2, R.id.name_tv3, R.id.name_tv4, R.id.name_tv5, R.id.name_tv6};
  private TextView[] name_tvs = new TextView[6];
  private int[] name_iv = {R.id.name_iv1, R.id.name_iv2, R.id.name_iv3, R.id.name_iv4, R.id.name_iv5, R.id.name_iv6};
  private ImageView[] name_ivs = new ImageView[6];
  private ArrayList<HomeFlipperBean  mFlipperList = new ArrayList<HomeFlipperBean ();

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.fragment_homenews, null);
    mMarqueeScroll = (MarqueeScroll) view.findViewById(R.id.MarqueeScroll);
    for (int i = 0; i < name_tv.length; i++) {
      name_tvs[i] = (TextView) view.findViewById(name_tv[i]);
      name_ivs[i] = (ImageView) view.findViewById(name_iv[i]);
    }
    mMarqueeScroll.run();

    // 在这里进行解析
    ResponseBaseBean<ArrayList<HomeFlipperBean   responsBaseBean = JSON.parseObject(mFlipperData,
        new TypeReference<ResponseBaseBean<ArrayList<HomeFlipperBean   () {
        });
    mFlipperList = responsBaseBean.getResult();

    if (mFlipperList != null && mFlipperList.size()   0) {
      // ForegroundColorSpan 为文字前景色,BackgroundColorSpan为文字背景色
      ForegroundColorSpan span1 = new ForegroundColorSpan(0xFF535353);
      ForegroundColorSpan span2 = new ForegroundColorSpan(0xFF346699);

      for (int i = 0; i < name_tvs.length; i++) {
        HomeFlipperBean bean = mFlipperList.get(i);
        name_tvs[i].setText(bean.getName() + " " + bean.getPrice());
        if ("up".equals(bean.getTrend())) {
          name_ivs[i].setBackgroundResource(R.drawable.in_img3);
        } else {
          name_ivs[i].setBackgroundResource(R.drawable.in_img4);
        }
        int length = bean.getName().length();
        SpannableStringBuilder builder = new SpannableStringBuilder(name_tvs[i].getText().toString());
        builder.setSpan(span1, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        builder.setSpan(span2, length + 1, name_tvs[i].getText().toString().length(),
            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        name_tvs[i].setText(builder);
      }
    }
  }
}

(2).fragment_homenews.xml:布局文件引用控件

代码语言:javascript
复制
<com.monkey.mushroom.ui.view.MarqueeScroll
   android:id="@+id/MarqueeScroll"
   android:layout_width="match_parent"
   android:layout_height="@dimen/kx_nonet_h"  

   <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="#E1F4FF"
     android:orientation="horizontal"  

     <TextView
        android:id="@+id/name_tv1"
        style="@style/filpper_text_style" / 

     <ImageView
        android:id="@+id/name_iv1"
        style="@style/filpper_image_style" / 

     <TextView
        android:id="@+id/name_tv2"
        style="@style/filpper_text_style" / 

     <ImageView
        android:id="@+id/name_iv2"
        style="@style/filpper_image_style" / 

     <TextView
        android:id="@+id/name_tv3"
        style="@style/filpper_text_style" / 

     <ImageView
        android:id="@+id/name_iv3"
        style="@style/filpper_image_style" / 

     <TextView
        android:id="@+id/name_tv4"
        style="@style/filpper_text_style" / 

     <ImageView
        android:id="@+id/name_iv4"
        style="@style/filpper_image_style" / 

     <TextView
        android:id="@+id/name_tv5"
        style="@style/filpper_text_style" / 

     <ImageView
        android:id="@+id/name_iv5"
        style="@style/filpper_image_style" / 

     <TextView
        android:id="@+id/name_tv6"
        style="@style/filpper_text_style" / 

     <ImageView
        android:id="@+id/name_iv6"
        style="@style/filpper_image_style" / 
   </LinearLayout 
</com.jyd.jyddz.ui.view.MarqueeScroll 

(3).MarqueeScroll.java:自定义HorizontalScrollView

代码语言:javascript
复制
public class MarqueeScroll extends HorizontalScrollView implements Runnable {
  private View inner;
  private Bitmap bitmap = null;

  /**
   * 滚动步长
   */
  private int step = 1;
  private int x;
  private int width;
  private int pWidth;
  private int pHeight;

  public MarqueeScroll(Context context, AttributeSet attrs) {
    super(context, attrs);
    setBackgroundColor(0xFFE1F4FF);
  }

  @Override
  protected void onFinishInflate() {

    if (getChildCount() == 1) {
      inner = getChildAt(0);
    }

  }

  @Override
  protected void onDetachedFromWindow() {

    super.onDetachedFromWindow();
    handler.removeCallbacks(this);
  }

  @Override
  protected void onDraw(Canvas canvas) {
    if (getWidth() == 0) {
      android.view.ViewGroup.LayoutParams lp = getLayoutParams();
      lp.width = pWidth;
      lp.height = pHeight;
      setLayoutParams(lp);
    }
    if (bitmap == null && inner != null) {
      width = inner.getMeasuredWidth();
      bitmap = Bitmap.createBitmap(width, inner.getHeight(), Config.RGB_565);
      Canvas canvas1 = new Canvas(bitmap);
      inner.draw(canvas1);
      pWidth = getWidth();
      pHeight = getHeight();
      if (inner != null) {
        removeViewInLayout(inner);
        inner = null;
      }

      run();
    }

    if (bitmap != null) {

      int nowX = x;
      nowX -= step;
      canvas.drawBitmap(bitmap, nowX, 0, null);

      if (nowX < 0) {

        canvas.drawBitmap(bitmap, width + nowX /* + space */, 0, null);
      }
      if (nowX <= -width) {
        nowX = 0;

      }
      x = nowX;
    }
    super.onDraw(canvas);
  }

  private Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {

      super.handleMessage(msg);
    }

  };

  @Override
  public void run() {

    invalidate();
    handler.postDelayed(this, 1);
  }
}

以上就是本文的全部内容,希望对大家的学习有所帮助。

本文参与 腾讯云自媒体分享计划,分享自作者个人站点/博客。
原始发表:2020-09-11 ,如有侵权请联系 cloudcommunity@tencent.com 删除

本文分享自 作者个人站点/博客 前往查看

如有侵权,请联系 cloudcommunity@tencent.com 删除。

本文参与 腾讯云自媒体分享计划  ,欢迎热爱写作的你一起参与!

评论
登录后参与评论
0 条评论
热度
最新
推荐阅读
领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档