布局式跑马灯，非TextView
原帖：http://dev.10086.cn/cmdn/bbs/viewthread.php?tid=42665&pid=259991&page=1&extra=#pid259991
如题，简单的实现了跑马灯效果，把Scroll.java放入android.view包下，XML使用如下：
<?xml version="1.0" encoding="utf-8"?>
<Scroll xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="100dip"
android:layout_height="wrap_content">
<!--注意：Scroll里的布局或者控件元素只能有一个可以用布局嵌套布局/控件来使用，当Scroll里的唯一元素的宽度超过Scroll效果最好，如果不超过没加处理，有兴趣可以自己加上-->
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text="放大镜流口水附近拉神经分裂卡上的经费里卡迪神经分裂空间爱上" />
</Scroll>
package android.view;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Bitmap.Config;import android.os.Handler;import android.os.Message;import android.util.AttributeSet;import android.widget.HorizontalScrollView;public class GroupScrollView extends HorizontalScrollView implements Runnable {private View inner;private Bitmap bitmap = null;private int x;private int width;private int pWidth;private int pHeight;/** * 滚动步长 */private int step = 5;/** * 滚动间隔距离 */private int space = 100;private int delay = 500;public GroupScrollView(Context context) {super(context);setBackgroundColor(android.R.color.transparent);}public GroupScrollView(Context context, AttributeSet attrs) {super(context, attrs);setBackgroundColor(android.R.color.transparent);}@Overrideprotected void onFinishInflate() {if (getChildCount() == 1) {inner = getChildAt(0);}}@Overrideprotected void onDetachedFromWindow() {super.onDetachedFromWindow();handler.removeCallbacks(this);}@Overrideprotected void onDraw(Canvas canvas) {if (getWidth() == 0) {android.view.ViewGroup.LayoutParams lp = getLayoutParams();lp.width = pWidth;lp.height = pHeight;setLayoutParams(lp);}if (bitmap == null && inner != null) {width = inner.getMeasuredWidth();bitmap = Bitmap.createBitmap(width, inner.getHeight(),Config.RGB_565);Canvas canvas1 = new Canvas(bitmap);inner.draw(canvas1);pWidth = getWidth();pHeight = getHeight();if (inner != null) {removeViewInLayout(inner);inner = null;}run();}if (bitmap != null) {int nowX = x;nowX -= step;canvas.drawBitmap(bitmap, nowX, 0, null);if (nowX < 0) {canvas.drawBitmap(bitmap, width + nowX + space, 0, null);}if (nowX <= -width) {nowX = 0;}x = nowX;}super.onDraw(canvas);}private Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);}};@Overridepublic void run() {invalidate();handler.postDelayed(this, delay);}}
布局main.xml：
<?xml version="1.0" encoding="utf-8"?><GroupScrollView xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="wrap_content"><LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content" android:orientation="vertical"><TextView android:layout_width="fill_parent"android:layout_height="wrap_content" android:text="1234567890abcdefghijklmnopqrstuvwxyz1234567890" /><LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content" android:orientation="horizontal"><TextView android:layout_width="fill_parent"android:layout_height="wrap_content" android:text="abcdefghijklmnopqrstuvwxyz" android:layout_weight="1"/><TextView android:layout_width="fill_parent"android:layout_height="wrap_content" android:text="1234567890" android:layout_weight="1"/></LinearLayout></LinearLayout></GroupScrollView>
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