Android自定义textview实现竖直滚动跑马灯效果

概述本文实例为大家分享了Android自定义textview实现跑马灯效果的具体代码，供大家参考，具体内容如下

本文实例为大家分享了AndroID自定义textvIEw实现跑马灯效果的具体代码，供大家参考，具体内容如下

xml布局

<?xml version="1.0" enCoding="utf-8"?><relativeLayout  xmlns:androID="http://schemas.androID.com/apk/res/androID"  xmlns:tools="http://schemas.androID.com/tools"  androID:ID="@+ID/activity_main"  androID:layout_wIDth="match_parent"  androID:layout_height="match_parent"  tools:context="myandroIDstituds.test3.MainActivity">  <linearLayout    androID:layout_centerInParent="true"    androID:layout_wIDth="180dp"    androID:layout_height="50dp">  <TextVIEw    androID:padding="10dp"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:background="#55000000"    />  </linearLayout>  <myandroIDstituds.test3.MarqueeLayout    androID:ID="@+ID/mar"    androID:layout_centerInParent="true"    androID:layout_wIDth="180dp"    androID:layout_height="50dp">    <TextVIEw      androID:ID="@+ID/tv1"      androID:textSize="20sp"      androID:gravity="center"      androID:background="@androID:color/transparent"      androID:layout_wIDth="match_parent"      androID:layout_height="match_parent"      androID:textcolor="#000000"      androID:visibility="gone"      androID:text="两个黄鹂鸣翠柳"      />    <TextVIEw      androID:ID="@+ID/tv2"      androID:textSize="20sp"      androID:background="@androID:color/transparent"      androID:gravity="center"      androID:layout_wIDth="match_parent"      androID:layout_height="match_parent"      androID:textcolor="#000000"      androID:visibility="gone"      androID:text="一行白鹭上青天"      />  </myandroIDstituds.test3.MarqueeLayout></relativeLayout>

自定义MarqueeLayout

public class MarqueeLayout extends FrameLayout implements VIEwTreeObserver.OnGlobalLayoutListener{  private VIEw vIEw1;  private VIEw vIEw2;  public int interval = 2000;  public MarqueeLayout(Context context) {    this(context,null);  }  public MarqueeLayout(Context context,AttributeSet attrs) {    this(context,attrs,0);  }  public MarqueeLayout(Context context,AttributeSet attrs,int defStyleAttr) {    super(context,defStyleAttr);    getVIEwTreeObserver().addOnGlobalLayoutListener(this);  }  @OverrIDe  protected voID onFinishInflate() {    super.onFinishInflate();    if(getChildCount()!=2){      throw new IllegalArgumentException("MarqueeLayout should have 2 child!");    }    vIEw1 = getChildAt(0);    vIEw2 = getChildAt(1);  }  @OverrIDe  public voID onGlobalLayout() {    getVIEwTreeObserver().removeGlobalOnLayoutListener(this);    vIEw2.setTranslationY(vIEw2.getHeight());  }  private Handler handler = new Handler(){    @OverrIDe    public voID handleMessage(Message msg) {      super.handleMessage(msg);      startAnim();    }  };  boolean isAniming = false;  /**   * 开始滚动   */  public voID start(){    getVIEwTreeObserver().addOnGlobalLayoutListener(new VIEwTreeObserver.OnGlobalLayoutListener() {      @OverrIDe      public voID onGlobalLayout() {        getVIEwTreeObserver().removeGlobalOnLayoutListener(this);        startAnim();      }    });  }  public voID startAnim(){    if(isAniming)return;    isAniming = true;    int targetY1 = vIEw1.getTranslationY()==0?-vIEw1.getHeight():0;    int targetY2 = vIEw2.getTranslationY()==0?-vIEw2.getHeight():0;    VIEwCompat.animate(vIEw1)        .translationY(targetY1)        .setListener(new VIEwPropertyAnimatorListenerAdapter(){          @OverrIDe          public voID onAnimationEnd(VIEw vIEw) {            super.onAnimationEnd(vIEw);            //移动到下方            resetVIEw(vIEw);          }        })        .setDuration(400).start();    VIEwCompat.animate(vIEw2)        .translationY(targetY2)        .setListener(new VIEwPropertyAnimatorListenerAdapter(){          @OverrIDe          public voID onAnimationEnd(VIEw vIEw) {            super.onAnimationEnd(vIEw);            //移动到下方            resetVIEw(vIEw);            isAniming = false;            handler.sendEmptyMessageDelayed(0,interval);          }        })        .setDuration(400)        .start();  }  private voID resetVIEw(VIEw vIEw) {    if(vIEw.getTranslationY()==-vIEw.getHeight()){      vIEw.setTranslationY(vIEw.getHeight()*2);    }  }  public voID stop(){    handler.removeCallbacksAndMessages(null);  }}

在Activity中的使用

public class MainActivity extends AppCompatActivity {  @OverrIDe  protected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_main);    MarqueeLayout marqueeLayout = (MarqueeLayout) findVIEwByID(R.ID.mar);    TextVIEw tv1 = (TextVIEw) findVIEwByID(R.ID.tv1);    TextVIEw tv2 = (TextVIEw) findVIEwByID(R.ID.tv2);    marqueeLayout.start();    tv1.setVisibility(tv1.getTranslationY() == 0 ? VIEw.VISIBLE : VIEw.GONE);    tv2.setVisibility(tv2.getTranslationY() == 0 ? VIEw.VISIBLE : VIEw.GONE);  }}

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