public class MarqueeText extends TextView implements Runnable {
private int currentScrollX;// 當(dāng)前滾動(dòng)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);
}
public MarqueeText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
if (!isMeasure) {// 文字寬度只需獲取一次就可以了
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() {
currentScrollX -= 2;// 滾動(dòng)速度
scrollTo(currentScrollX, 0);
if (isStop) {
return;
}
if (getScrollX() <= -(this.getWidth())) {
scrollTo(textWidth, 0);
currentScrollX = textWidth;
// return;
}
postDelayed(this, 5);
}
// 開(kāi)始滾動(dòng)
public void startScroll() {
isStop = false;
this.removeCallbacks(this);
post(this);
}
// 停止?jié)L動(dòng)
public void stopScroll() {
isStop = true;
}
// 從頭開(kāi)始滾動(dòng)
public void startFor0() {
currentScrollX = 0;
startScroll();
}
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="start"
android:text="走起" />
<Button
android:id="@+id/stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="stop"
android:text="停止" />
<Button
android:id="@+id/startfor0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="startFor0"
android:text="從頭開(kāi)始" />
<simtice.demo.marqueetext.MarqueeText
android:id="@+id/test"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#339320"
android:ellipsize="marquee"
android:singleLine="true"
android:text="這才是真正的文字跑馬燈效果這才是真正的字跑馬燈效果這才是真正的"
android:textColor="#000000"
android:textSize="20dp" >
</simtice.demo.marqueetext.MarqueeText>
</LinearLayout>
MainActivity

public class MainActivity extends Activity {
private MarqueeText test;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
test = (MarqueeText) this.findViewById(R.id.test);
}
public void start(View v) {
test.startScroll();
}
public void stop(View v) {
test.stopScroll();
}
public void startFor0(View v){
test.startFor0();
}
}