Android自定义图文跑马灯效果

之前的需求是用FlipperView来实现上下翻动效果，但是发现数据有点长会造成一屏幕放不下三条数据，后来改为跑马灯，但是只有文字的跑马灯TextView自己就有，但是要求文字后面带一个小图标怎们办呢？

(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<HomeFlipperBean> mFlipperList = new ArrayList<HomeFlipperBean>();

@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<ArrayList<HomeFlipperBean>> responsBaseBean = JSON.parseObject(mFlipperData,
new TypeReference<ResponseBaseBean<ArrayList<HomeFlipperBean>>>() {
});
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

<com.monkey.mushroom.ui.view.MarqueeScroll
android:id="@+id/MarqueeScroll"
android:layout_width="match_parent"
android:layout_height="@dimen/kx_nonet_h" >

<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#E1F4FF"
android:orientation="horizontal" >

<TextView
android:id="@+id/name_tv1"
style="@style/filpper_text_style" />

<ImageView
android:id="@+id/name_iv1"
style="@style/filpper_image_style" />

<TextView
android:id="@+id/name_tv2"
style="@style/filpper_text_style" />

<ImageView
android:id="@+id/name_iv2"
style="@style/filpper_image_style" />

<TextView
android:id="@+id/name_tv3"
style="@style/filpper_text_style" />

<ImageView
android:id="@+id/name_iv3"
style="@style/filpper_image_style" />

<TextView
android:id="@+id/name_tv4"
style="@style/filpper_text_style" />

<ImageView
android:id="@+id/name_iv4"
style="@style/filpper_image_style" />

<TextView
android:id="@+id/name_tv5"
style="@style/filpper_text_style" />

<ImageView
android:id="@+id/name_iv5"
style="@style/filpper_image_style" />

<TextView
android:id="@+id/name_tv6"
style="@style/filpper_text_style" />

<ImageView
android:id="@+id/name_iv6"
style="@style/filpper_image_style" />
</LinearLayout>
</com.jyd.jyddz.ui.view.MarqueeScroll>

(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);
}
}

以上就是本文的全部内容，希望对大家的学习有所帮助

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