實現效果如下：

使用方法如下：
在用到的XML 中和使用普通TextView一樣定義

 <com.example.harvin.mymenu_1.AutoScrollTextView
        android:id="@+id/TextViewNotice"
        android:layout_width="fill_parent"
        android:layout_height="30px"
        android:layout_marginTop="100dp"
        android:background="#EEE"
        android:inputType="text"
 

        android:text="Test,Test,Test,Test"
        android:textColor="#000"
        android:textSize="20px"></com.example.harvin.mymenu_1.AutoScrollTextView>

在java 檔案中使用如下：

 autoScrollTextView = (AutoScrollTextView) findViewById(R.id.TextViewNotice);
        autoScrollTextView.init(getWindowManager());
 

如果改變文字內容或效果，在呼叫setText()後，需要呼叫init方法初始化，不然，不能出現想要的效果。

原始碼如下：

package com.example.harvin.mymenu_1;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.Display;
import
 
 android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

import org.w3c.dom.Text;

/**
 * Created by 黃阿懶 on 2015/12/3.
 */

public class AutoScrollTextView extends TextView implements View.OnClickListener {
    public final static String TAG = AutoScrollTextView.class.getSimpleName();

    private float textLength = 0f;//文字長度
    private float viewWidth = 0f;
    private float step = 0f;//文字的橫座標
    private float y = 0f;//文字的縱座標
    private float temp_view_plus_text_length = 0.0f;//用於計算的臨時變數
    private float temp_view_plus_two_text_length = 0.0f;//用於計算的臨時變數
    public boolean isStarting = false;//是否開始滾動
    private Paint paint = null;//繪圖樣式
    private String text = "";//文字內容

    public AutoScrollTextView(Context context) {
        super(context);
        initView();
    }

    public AutoScrollTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView();
    }

    public AutoScrollTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initView();
    }


    private void initView() {
        setOnClickListener(this);//給該空間本身註冊單擊監聽
    }

    /**
     * 初始化 該方法使用該控制元件的物件呼叫
     * @param windowManager
     */

    public void init(WindowManager windowManager) {
        paint = getPaint();
        text = getText().toString();
        textLength = paint.measureText(text);
        viewWidth = getWidth();
        if (viewWidth == 0) {//寬度為0使用預設寬度
            if (windowManager != null) {
                Display display = windowManager.getDefaultDisplay();
                viewWidth = display.getWidth();
            }
        }
        step = textLength;
        temp_view_plus_text_length = viewWidth + textLength;
        temp_view_plus_two_text_length = viewWidth + textLength * 2;
        y = getTextSize() + getPaddingTop();
    }

    @Override
    public Parcelable onSaveInstanceState() {
        Parcelable superState =    super.onSaveInstanceState();
        SavedState ss = new SavedState(superState);
        ss.step = step;
        ss.isStarting = isStarting;
        return ss;
    }

    @Override
    public void onRestoreInstanceState(Parcelable state) {
        if (!(state instanceof SavedState)) {
            super.onRestoreInstanceState(state);
            return;
        }
        SavedState ss = (SavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());
        step = ss.step;
        isStarting = ss.isStarting;
    }

    public static class SavedState extends BaseSavedState {
        public boolean isStarting = false;
        public float step = 0.0f;

        SavedState(Parcelable superState) {
            super(superState);
        }

        @Override
        public void writeToParcel(Parcel out, int flags) {
            super.writeToParcel(out, flags);
            out.writeBooleanArray(new boolean[]{isStarting});
            out.writeFloat(step);
        }

        public static final Parcelable.Creator<SavedState> CREATOR
             = new Parcelable.Creator<SavedState>() {
            public SavedState[] newArray(int size) {
                return new SavedState[size];
            }

            @Override
          public SavedState createFromParcel(Parcel in) {
                return new SavedState(in);
            }
        };

        private SavedState(Parcel in) {
            super(in);
            boolean[] b = null;
            in.readBooleanArray(b);
            if (b != null && b.length > 0)
                isStarting = b[0];
            step = in.readFloat();
        }
    }

    public void startScroll() {
        isStarting = true;
        invalidate();
    }

    public void stopScroll() {
        isStarting = false;
        invalidate();
    }
    @Override
    public void onDraw(Canvas canvas) {
        canvas.drawText(text, temp_view_plus_text_length - step, y, paint);
        if (!isStarting) {
            return;
        }
        step += 0.5;//0.5為文字滾動速度。
        if (step > temp_view_plus_two_text_length)
            step = textLength;
        invalidate();
    }

    @Override
    public void onClick(View v) {
        if (isStarting)
            stopScroll();//停止滾動
        else
            startScroll();//開始滾動
    }
}

END