程式碼

public class MainActivity extends AppCompatActivity {
    private MarqueeText text;
    private LinearLayout layout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        text = (MarqueeText) findViewById(R.id.test);
        layout = (LinearLayout) findViewById(R.id.my_layout);
    }


    public
 
 void stop(View v) {
        text.stopScroll();
        layout.setVisibility(View.GONE);
    }
}

    public class MarqueeText extends TextView implements Runnable {

    private int currentScrollX;//當前滾動的位置
    private boolean isStop = false;
    private int textWidth;
    private boolean isMeasure = false
 
;

    public MarqueeText(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

    public MarqueeText(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }

    public MarqueeText(Context context, AttributeSet attrs, int
 
 defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

    @Override
    protected void onDraw(Canvas canvas) {
        // TODO Auto-generated method stub
        super.onDraw(canvas);
        if (!isMeasure) {//文字寬度只需要獲取一次就可以了
            getTextWidth();
            isMeasure = true;
        }
    }

    /**
     * 獲取文字寬度
     */
    private void getTextWidth() {
        Paint paint = this.getPaint();
        String str = this.getText().toString();
        textWidth = (int) paint.measureText(str);
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        currentScrollX -= 2;  // Rolling speed
        scrollTo(currentScrollX, 0);
        if (isStop) {
            return;
        }
        if (getScaleX() <= -(this.getWidth())) {
            scrollTo(textWidth, 0);
            currentScrollX = textWidth;
            //return;
        }
        postDelayed(this, 5);
    }

    // start
    public void startScroll() {
        isStop = false;
        this.removeCallbacks(this);
        post(this);
    }

    // stop
    public void stopScroll() {
        isStop = true;
    }

    // Start from scratch
    public void startFor0() {
        currentScrollX = 0;
        startScroll();
    }
}

佈局檔案

  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:id="@+id/activity_main"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="example.wy.MainActivity">

    <LinearLayout
        android:id="@+id/my_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:paddingLeft="5dp"
        android:background="#e5e2e2"
        android:paddingRight="5dp">

        <example.wy.MarqueeText
            android:id="@+id/test"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1.0"
            android:background="#e5e2e2"
            android:ellipsize="marquee"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:marqueeRepeatLimit="marquee_forever"

            android:singleLine="true"
            android:text="跑馬燈，套馬杆的漢子你威武雄壯"
            android:textColor="#000000"
            android:textSize="16sp" >
        </example.wy.MarqueeText>

        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="20dp"
            android:background="#e5e2e2"
            android:onClick="stop"
            android:text="停止"
            android:layout_marginLeft="5dp"
            android:textSize="16sp" />
    </LinearLayout>
</LinearLayout>