Android实现文字滚动效果

概述Android实现文字滚动效果，自己写了个timer小计时器，textview文字上下翻动效果：

AndroID 实现文字滚动效果，自己写了个timer小计时器，textvIEw文字上下翻动效果：

public class autoTextVIEw extends TextSwitcher implements  VIEwSwitcher.VIEwFactory { private float mHeight; private Context mContext; //mInUp,mOutUp分别构成向下翻页的进出动画 private Rotate3dAnimation mInUp; private Rotate3dAnimation mOutUp;  //mInDown,mOutDown分别构成向下翻页的进出动画 private Rotate3dAnimation mInDown; private Rotate3dAnimation mOutDown;  public autoTextVIEw(Context context) {  this(context,null);  // Todo auto-generated constructor stub } public autoTextVIEw(Context context,AttributeSet attrs) {  super(context,attrs);  // Todo auto-generated constructor stub  TypedArray a = context.obtainStyledAttributes(attrs,R.styleable.auto3d);  mHeight = a.getDimension(R.styleable.auto3d_textSize,16);  a.recycle();  mContext = context;  init(); } private voID init() {  // Todo auto-generated method stub  setFactory(this);  mInUp = createAnim(-90,true,true);  mOutUp = createAnim(0,90,false,true);  mInDown = createAnim(90,false);  mOutDown = createAnim(0,-90,false);  //TextSwitcher主要用于文件切换，比如 从文字A 切换到 文字 B，  //setInAnimation()后，A将执行inAnimation，  //setoutAnimation()后，B将执行OutAnimation  setInAnimation(mInUp);  setoutAnimation(mOutUp); }  private Rotate3dAnimation createAnim(float start,float end,boolean turnIn,boolean turnUp){  final Rotate3dAnimation rotation = new Rotate3dAnimation(start,end,turnIn,turnUp);  rotation.setDuration(800);  rotation.setFillAfter(false);  rotation.setInterpolator(new AccelerateInterpolator());  return rotation; } //这里返回的TextVIEw，就是我们看到的VIEw @OverrIDe public VIEw makeVIEw() {  // Todo auto-generated method stub  TextVIEw t = new TextVIEw(mContext);  t.setGravity(Gravity.CENTER);  t.setTextSize(16);  t.setMaxlines(1);  t.setTextcolor(mContext.getResources().getcolor(R.color.textcolor));  return t; } //定义动作，向下滚动翻页 public voID prevIoUs(){  if(getInAnimation() != mInDown){   setInAnimation(mInDown);  }  if(getoutAnimation() != mOutDown){   setoutAnimation(mOutDown);  } } //定义动作，向上滚动翻页 public voID next(){  if(getInAnimation() != mInUp){   setInAnimation(mInUp);  }  if(getoutAnimation() != mOutUp){   setoutAnimation(mOutUp);  } }  class Rotate3dAnimation extends Animation {   private final float mFromdegrees;   private final float mTodegrees;   private float mCenterX;   private float mCenterY;   private final boolean mTurnIn;   private final boolean mTurnUp;   private Camera mCamera;   public Rotate3dAnimation(float fromdegrees,float todegrees,boolean turnUp) {    mFromdegrees = fromdegrees;    mTodegrees = todegrees;    mTurnIn = turnIn;    mTurnUp = turnUp;   }   @OverrIDe   public voID initialize(int wIDth,int height,int parentWIDth,int parentHeight) {    super.initialize(wIDth,height,parentWIDth,parentHeight);    mCamera = new Camera();    mCenterY = getHeight() / 2;    mCenterX = getWIDth() / 2;   }      @OverrIDe   protected voID applytransformation(float interpolatedTime,transformation t) {    final float fromdegrees = mFromdegrees;    float degrees = fromdegrees + ((mTodegrees - fromdegrees) * interpolatedTime);    final float centerX = mCenterX ;    final float centerY = mCenterY ;    final Camera camera = mCamera;    final int derection = mTurnUp ? 1: -1;    final Matrix matrix = t.getMatrix();    camera.save();    if (mTurnIn) {     camera.translate(0.0f,derection *mCenterY * (interpolatedTime - 1.0f),0.0f);    } else {     camera.translate(0.0f,derection *mCenterY * (interpolatedTime),0.0f);    }    camera.rotateX(degrees);    camera.getMatrix(matrix);    camera.restore();    matrix.preTranslate(-centerX,-centerY);    matrix.postTranslate(centerX,centerY);   } }

demo下载链接：http://xiazai.jb51.net/201611/yuanma/AndroidTextView(jb51.net).rar

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