今天就跟大家聊聊有关怎么在Android中自定义一个图文跑马灯效果，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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(1).MainActivity.java：
public class HomeFragment extends BaseFragment {
private MarqueeScroll mMarqueeScroll;
private int[] name_tv = {R.id.name_tv1, R.id.name_tv2, R.id.name_tv3, R.id.name_tv4, R.id.name_tv5, R.id.name_tv6};
private TextView[] name_tvs = new TextView[6];
private int[] name_iv = {R.id.name_iv1, R.id.name_iv2, R.id.name_iv3, R.id.name_iv4, R.id.name_iv5, R.id.name_iv6};
private ImageView[] name_ivs = new ImageView[6];
private ArrayList mFlipperList = new ArrayList();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_homenews, null);
mMarqueeScroll = (MarqueeScroll) view.findViewById(R.id.MarqueeScroll);
for (int i = 0; i < name_tv.length; i++) {
name_tvs[i] = (TextView) view.findViewById(name_tv[i]);
name_ivs[i] = (ImageView) view.findViewById(name_iv[i]);
}
mMarqueeScroll.run();
// 在这里进行解析
ResponseBaseBean> responsBaseBean = JSON.parseObject(mFlipperData,
new TypeReference>>() {
});
mFlipperList = responsBaseBean.getResult();
if (mFlipperList != null && mFlipperList.size() > 0) {
// ForegroundColorSpan 为文字前景色，BackgroundColorSpan为文字背景色
ForegroundColorSpan span1 = new ForegroundColorSpan(0xFF535353);
ForegroundColorSpan span2 = new ForegroundColorSpan(0xFF346699);
for (int i = 0; i < name_tvs.length; i++) {
HomeFlipperBean bean = mFlipperList.get(i);
name_tvs[i].setText(bean.getName() + " " + bean.getPrice());
if ("up".equals(bean.getTrend())) {
name_ivs[i].setBackgroundResource(R.drawable.in_img3);
} else {
name_ivs[i].setBackgroundResource(R.drawable.in_img4);
}
int length = bean.getName().length();
SpannableStringBuilder builder = new SpannableStringBuilder(name_tvs[i].getText().toString());
builder.setSpan(span1, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
builder.setSpan(span2, length + 1, name_tvs[i].getText().toString().length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
name_tvs[i].setText(builder);
}
}
}
} (2).fragment_homenews.xml：布局文件引用控件
(3).MarqueeScroll.java：自定义HorizontalScrollView
public class MarqueeScroll extends HorizontalScrollView implements Runnable {
private View inner;
private Bitmap bitmap = null;
/**
* 滚动步长
*/
private int step = 1;
private int x;
private int width;
private int pWidth;
private int pHeight;
public MarqueeScroll(Context context, AttributeSet attrs) {
super(context, attrs);
setBackgroundColor(0xFFE1F4FF);
}
@Override
protected void onFinishInflate() {
if (getChildCount() == 1) {
inner = getChildAt(0);
}
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
handler.removeCallbacks(this);
}
@Override
protected 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() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
}
};
@Override
public void run() {
invalidate();
handler.postDelayed(this, 1);
}
}看完上述内容，你们对怎么在Android中自定义一个图文跑马灯效果有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。