專案需要TextView單行豎直滾動文字廣告效果，很簡單的功能在網上找了很多沒有想要的效果。

開始找到的http://www.cnblogs.com/vaiyanzi/archive/2011/12/06/2277791.html，歌詞效果，對程式碼處理一下變成單行後，發現沒有的動態動態滾動的效果，只有文字的瞬間切換。

後來又找到了http://blog.csdn.net/ville_zeng/article/details/8953140，3d滾動效果。我只想要一個簡單的滾動就這麼難嗎，好吧接著改程式碼吧。還是很感謝博主的，最後還是在這篇文章的基礎上修改的。直接上程式碼。

1、自定義TextView：

package com.cx.textviewverticalrolling;

import android.content.Context;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.Transformation;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher;

public class AutoTextView extends TextSwitcher implements
		ViewSwitcher.ViewFactory {

	private float mHeight = 10;
	private Context mContext;
	//mInUp,mOutUp分別構成向下翻頁的進出動畫
	private Animation mInUp;
	private Animation mOutUp;
	
	//mInDown,mOutDown分別構成向下翻頁的進出動畫
	private Animation mInDown;
	private Animation 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
		mContext = context;
		init();
	}

	private void init() {
		// TODO Auto-generated method stub
		setFactory(this);
		mInUp = createAnim(0, 0 , true, true);
		mOutUp = createAnim(0, 0, false, true);
		mInDown = createAnim(90, 0 , true , false);
		mOutDown = createAnim(0, -90, false, false);
        setInAnimation(mInUp);
        setOutAnimation(mOutUp);
	}
	
	private Animation createAnim(float start, float end, boolean turnIn, boolean turnUp){
        final Animation rotation = new Rotate3dAnimation(start, end, turnIn, turnUp);
        rotation.setDuration(1000);
        rotation.setFillAfter(false);
        rotation.setInterpolator(new AccelerateInterpolator());
        return rotation;
	}

	//這裡返回的TextView，就是我們看到的View
	@Override
	public View makeView() {
		// TODO Auto-generated method stub
		TextView t = new TextView(mContext);
		t.setGravity(Gravity.CENTER_VERTICAL);
		t.setTextSize(mHeight);
		t.setMaxLines(1);
		return t;
	}
	//定義動作，向下滾動翻頁
	public void previous(){
		if(getInAnimation() != mInDown){
			setInAnimation(mInDown);
		}
		if(getOutAnimation() != mOutDown){
			setOutAnimation(mOutDown);
		}
	}
	//定義動作，向上滾動翻頁
	public void next(){
		if(getOutAnimation() != mOutUp){
			setOutAnimation(mOutUp);
		}
		if(getInAnimation() != mInUp){
			setInAnimation(mInUp);
		}
	}
	
	 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 turnIn, 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();
		        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);
		    }
	 }
}
 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000" >

    <com.cx.textviewverticalrolling.AutoTextView
        android:id="@+id/autoTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:background="#fff" >
    </com.cx.textviewverticalrolling.AutoTextView>

</RelativeLayout>
 

package com.cx.textviewverticalrolling;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;

public class MainActivity extends Activity {
	private Handler handler = new Handler();
	private AutoTextView autoTextView;
	private int count = 0;
	private List<String> arrList = new ArrayList<String>();

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		getData();
		autoTextView = (AutoTextView) findViewById(R.id.autoTextView);
		handler.postDelayed(runnable, 0);
	}
	
	private void getData() {
		// TODO Auto-generated method stub
		for (int i = 0; i < 10; i++) {
			arrList.add("豎直滾動TextView-資料" + i);
		}
	}

	Runnable runnable = new Runnable() {  
		  
        @Override  
        public void run() {  
            // handler自帶方法實現定時器  
            try {  
                handler.postDelayed(this, 3000); 
                autoTextView.next();
                autoTextView.setText(arrList.get(count % arrList.size())); 
                count++;
            } catch (Exception e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            }  
        }  
    };  
}