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import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.OnGestureListener;
import android.view.View.OnTouchListener;
import android.widget.TextView;
/**
* 自定义跑马灯文本框，支持拖拽查看文本内容，点击暂停文字 先设置要显示文本，然后调用Start()方法运行跑马灯
*
* @author sy
*/
public
class MarqueeTextView extends
TextView implements
Runnable,
OnTouchListener {
public
MarqueeTextView(Context context) {
super(context);
}
/** 是否停止滚动 */
private
boolean mStopMarquee;
private
String mText;
public
int mCoordinateX;
int
xOffset;
private
int mTextWidth;
GestureDetector gestureDetector;
public
MarqueeTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public
MarqueeTextView(Context context, AttributeSet attrs, int
defStyle) {
super(context, attrs, defStyle);
}
/**
* 开始滚动
*
* @param text
*/
public
void Start() {
this.setOnTouchListener(this);
gestureDetector = new
GestureDetector(getContext(),
new
OnGestureListener() {
@Override
public
boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
return
false;
}
@Override
public
void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public
boolean onScroll(MotionEvent e1, MotionEvent e2,
float
distanceX, float
distanceY) {
mCoordinateX += (int) distanceX;
scrollTo(mCoordinateX, 0);
// TODO:设置偏移量，distanceX为滑动距离
return
true;
}
@Override
public
void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public
boolean onFling(MotionEvent e1, MotionEvent e2,
float
velocityX, float
velocityY) {
return
false;
}
@Override
public
boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return
false;
}
});
xOffset = 0;
mStopMarquee = false;
mText = this.getText().toString();// 获取文本框文本
mCoordinateX = 0;
mTextWidth = (int) Math.abs(getPaint().measureText(mText));
post(this);
}
@Override
public
void run() {
if
(!mStopMarquee) {
mCoordinateX += 3;// 滚动速度
scrollTo(mCoordinateX, 0);
if
(mCoordinateX > mTextWidth) {
scrollTo(0, 0);
mCoordinateX = 0;
}
postDelayed(this, 50);
}
}
// 继续滚动
public
void Continue() {
if
(mStopMarquee) {
mStopMarquee = false;
post(this);
}
}
// 暂停滚动
public
void Paush() {
mStopMarquee = true;
}
@Override
public
boolean onTouch(View v, MotionEvent event) {
switch
(event.getAction()) {
case
MotionEvent.ACTION_DOWN:
case
MotionEvent.ACTION_MOVE:
case
MotionEvent.ACTION_SCROLL:
Paush();
break;
default:
Continue();
break;
}
gestureDetector.onTouchEvent(event);
return
true;
}
}
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