對(duì)于抽獎(jiǎng)頁 我們都用到了公告欄循環(huán)播放中獎(jiǎng)名單的動(dòng)畫效果；一下介紹下自定義AutoTextView?實(shí)現(xiàn)了公告欄 文字 3D 翻轉(zhuǎn)動(dòng)畫效果，無限循環(huán)播放，具有向上或者向下翻轉(zhuǎn)特效。

現(xiàn)在先上效果圖：

下面附上代碼介紹：

自定義AutoTextView繼承自TextSwitcher，實(shí)現(xiàn)文字切換，自定義動(dòng)畫，實(shí)現(xiàn)3d動(dòng)畫效果；

class Rotate3dAnimation extends Animation {private final float mFromDegrees; //初始值private final float mToDegrees; //最終值private final boolean mTurnIn; //進(jìn)private final boolean mTurnUp; //出private float mCenterX;private float mCenterY;private Camera mCamera;public Rotate3dAnimation(float fromDegrees, float toDegrees, boolean turnIn, boolean turnUp) {mFromDegrees = fromDegrees;mToDegrees = toDegrees;mTurnIn = turnIn;mTurnUp = turnUp;}//初始化動(dòng)作@Overridepublic 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;}//定義動(dòng)畫效果@Overrideprotected void applyTransformation(float interpolatedTime, Transformation t) {final float fromDegrees = mFromDegrees;//當(dāng)前值 = 初始值 + （最終值 - 初始值） * interpolatedTime;float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);final float centerX = mCenterX;final float centerY = mCenterY;final Camera camera = mCamera;final int derection = mTurnUp ? 1 : -1;//通過camera進(jìn)行一些矩陣操作，最后對(duì)matrix進(jìn)行變化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);}}

重新定義了一個(gè)Animation，覆寫了initialize和applyTransformation方法，利用矩陣實(shí)現(xiàn)3D翻頁特效

下面附上整體代碼：

public class AutoTextView extends TextSwitcher implements ViewFactory {private float mHeight;private Context mContext;//mInUp,mOutUp分別構(gòu)成向上翻頁的進(jìn)出動(dòng)畫private Rotate3dAnimation mInUp;private Rotate3dAnimation mOutUp;//mInDown,mOutDown分別構(gòu)成向下翻頁的進(jìn)出動(dòng)畫private Rotate3dAnimation mInDown;private Rotate3dAnimation mOutDown;public AutoTextView(Context context) {this(context, null);}public AutoTextView(Context context, AttributeSet attrs) {super(context, attrs);TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.auto3d);mHeight = a.getDimension(R.styleable.auto3d_textSize, 36);a.recycle();mContext = context;init();}private void init() {setFactory(this);//向上翻頁的進(jìn)出動(dòng)畫mInUp = createAnim(-90, 0, true, true);//進(jìn)動(dòng)畫mOutUp = createAnim(0, 90, false, true);//出動(dòng)畫//向下翻頁的進(jìn)出動(dòng)畫mInDown = createAnim(90, 0, true, false);mOutDown = createAnim(0, -90, false, false);//繼承TextSwitcher主要用于文件切換，比如 從文字A 切換到 文字 B，//setInAnimation()后，A將執(zhí)行inAnimation，//setOutAnimation()后，B將執(zhí)行OutAnimationsetInAnimation(mInUp);setOutAnimation(mOutUp);}//動(dòng)畫private Rotate3dAnimation createAnim(float start, float end, boolean turnIn, boolean turnUp) {final Rotate3dAnimation rotation = new Rotate3dAnimation(start, end, turnIn, turnUp);//設(shè)置動(dòng)畫持續(xù)時(shí)間rotation.setDuration(300);//fillAfter設(shè)為true，則動(dòng)畫執(zhí)行后，控件將停留在動(dòng)畫結(jié)束的狀態(tài),false 則不停留rotation.setFillAfter(false);//設(shè)置動(dòng)畫的變化速度 加速rotation.setInterpolator(new AccelerateInterpolator());return rotation;}//這里返回的TextView，就是我們看到的View@Overridepublic View makeView() {TextView t = new TextView(mContext);t.setGravity(Gravity.CENTER);t.setTextSize(mHeight);t.setSingleLine(true);return t;}//定義動(dòng)作，向下滾動(dòng)翻頁public void previous() {if (getInAnimation() != mInDown) {setInAnimation(mInDown);}if (getOutAnimation() != mOutDown) {setOutAnimation(mOutDown);}}//定義動(dòng)作，向上滾動(dòng)翻頁public void next() {if (getInAnimation() != mInUp) {setInAnimation(mInUp);}if (getOutAnimation() != mOutUp) {setOutAnimation(mOutUp);}}/*** 3d動(dòng)畫* 重新定義了一個(gè)Animation，覆寫了initialize和applyTransformation方法*/class Rotate3dAnimation extends Animation {private final float mFromDegrees; //初始值private final float mToDegrees; //最終值private final boolean mTurnIn; //進(jìn)private final boolean mTurnUp; //出private float mCenterX;private float mCenterY;private Camera mCamera;public Rotate3dAnimation(float fromDegrees, float toDegrees, boolean turnIn, boolean turnUp) {mFromDegrees = fromDegrees;mToDegrees = toDegrees;mTurnIn = turnIn;mTurnUp = turnUp;}//初始化動(dòng)作@Overridepublic 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;}//定義動(dòng)畫效果@Overrideprotected void applyTransformation(float interpolatedTime, Transformation t) {final float fromDegrees = mFromDegrees;//當(dāng)前值 = 初始值 + （最終值 - 初始值） * interpolatedTime;float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);final float centerX = mCenterX;final float centerY = mCenterY;final Camera camera = mCamera;final int derection = mTurnUp ? 1 : -1;//通過camera進(jìn)行一些矩陣操作，最后對(duì)matrix進(jìn)行變化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);}} }

在activity中：

添加公告欄數(shù)據(jù)：

// 數(shù)據(jù)mStringArray = new ArrayList<String>();mStringArray.add("137****1111 獲得一等獎(jiǎng)");mStringArray.add("137****2222 獲得二等獎(jiǎng)");mStringArray.add("137****3333 獲得三等獎(jiǎng)");mStringArray.add("137****4444 獲得四等獎(jiǎng)");

通過headler發(fā)送消息開始自動(dòng)翻轉(zhuǎn)：

//開始動(dòng)畫button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if (mEventHandler == null){mEventHandler = new EventHandler(MainActivity.this);//Value為FLAG的消息延遲0.5秒mEventHandler.sendEmptyMessageDelayed(FLAG, 500);}}}); public static class EventHandler extends Handler {private WeakReference<MainActivity> wr;public EventHandler(MainActivity r) {wr = new WeakReference<MainActivity>(r);}@Overridepublic void handleMessage(android.os.Message msg) {MainActivity activity = wr.get();switch (msg.what) {case 1:if (activity.mStringArray.size()!= 0){//無限循環(huán)int i = activity.mLoopCount % activity.mStringArray.size();// 向上滾動(dòng)翻頁activity.mAutoTextView.next();//給AutoTextView 設(shè)置文字activity.mAutoTextView.setText(activity.mStringArray.get(i));activity.mLoopCount ++;//Value為FLAG的消息延遲0.5秒activity.mEventHandler.sendEmptyMessageDelayed(FLAG, 500);}break;}}}

在頁面結(jié)束時(shí)一定要釋放掉handler：

//停止動(dòng)畫，釋放handlerbutton1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if (mEventHandler != null){//移出消息mEventHandler.removeMessages(FLAG);mEventHandler = null;}}});

xml文件：

<com.ss.autotextview.AutoTextViewandroid:id="@+id/id_main_switcher"android:layout_width="match_parent"android:layout_height="50dp"auto3d:textSize="10sp" />

注意 ?一定要在布局文件的父控件添加：

xmlns:auto3d="http://schemas.android.com/apk/res-auto"

下面附上demo下載地址：

https://download.csdn.net/download/shanshan_1117/10315694

點(diǎn)擊打開鏈接

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