php直播源码如何实现TextView竖直滚动

php直播源码如何实现TextView竖直滚动，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。

public class AutoScrollTextView extends TextSwitcher implements        ViewSwitcher.ViewFactory {    private static final int FLAG_START_AUTO_SCROLL = 1001;    private static final int FLAG_STOP_AUTO_SCROLL = 1002;    /**     * 轮播时间间隔     */    private int scrollDuration = 2000;    /**     * 动画时间     */    private int animDuration = 1000;    /**     * 文字大小     */    private float mTextSize = 14;    /**     * 文字Padding     */    private int mPadding = 20;    /**     * 文字颜色     */    private int textColor = Color.BLACK;    private OnItemClickListener itemClickListener;    private Context mContext;    /**     * 当前显示Item的ID     */    private volatile int currentId = -1;    private CopyOnWriteArrayList textList;    private Handler handler;    public AutoScrollTextView(Context context) {        this(context, null);        mContext = context;    }    public AutoScrollTextView(Context context, AttributeSet attrs) {        super(context, attrs);        mContext = context;        init();    }    @SuppressLint("HandlerLeak")    private void init() {        textList = new CopyOnWriteArrayList<>();        handler = new Handler() {            @Override            public void handleMessage(Message msg) {                switch (msg.what) {                    case FLAG_START_AUTO_SCROLL:                        if (textList.size() > 0) {                            currentId++;                            setText(textList.get(currentId % textList.size()));                        }                        handler.sendEmptyMessageDelayed(FLAG_START_AUTO_SCROLL, scrollDuration);                        break;                    case FLAG_STOP_AUTO_SCROLL:                        handler.removeMessages(FLAG_START_AUTO_SCROLL);                        break;                }            }        };        setFactory(this);        Animation in = new TranslateAnimation(0, 0, 300, 0);        in.setDuration(animDuration);        in.setInterpolator(new AccelerateInterpolator());        Animation out = new TranslateAnimation(0, 0, 0, -300);        out.setDuration(animDuration);        out.setInterpolator(new AccelerateInterpolator());        setInAnimation(in);        setOutAnimation(out);    }    /**     * 设置数据源     *     * @param titles     */    public void setTextList(ArrayList titles) {        textList.clear();        textList.addAll(titles);        currentId = -1;    }    public void setText1(String text) {        if (TextUtils.isEmpty(text)) {            return;        }        stopAutoScroll();        int width = getWidth() - mPadding * 2;        TextPaint paint = new TextPaint();        paint.setTextSize(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, mTextSize, mContext.getResources().getDisplayMetrics()));        if (width < paint.measureText(" ")) {            return;        }        List lineList = new ArrayList<>();        StringBuilder newLine = new StringBuilder();        for (int i = 0; i < text.length(); i++) {            if ('\n' == text.charAt(i)) {                lineList.add(newLine.toString());                newLine.setLength(0);            } else {                newLine.append(text.charAt(i));                if (paint.measureText(newLine.toString()) > width) {                    lineList.add(newLine.toString().substring(0, newLine.toString().length() - 1));                    i--;                    newLine.setLength(0);                } else {                    if (i == text.length() - 1) {                        lineList.add(newLine.toString());                        newLine.setLength(0);                        break;                    }                }            }        }        textList.clear();        textList.addAll(lineList);        currentId = -1;    }    /**     * 开始轮播     */    public void startAutoScroll() {        if (textList.isEmpty()) {            return;        }        if (textList.size() == 1) {            setText(textList.get(0));            return;        }        handler.removeCallbacksAndMessages(null);        handler.sendEmptyMessage(FLAG_START_AUTO_SCROLL);    }    /**     * 停止轮播     */    public void stopAutoScroll() {        handler.sendEmptyMessage(FLAG_STOP_AUTO_SCROLL);    }    @Override    public View makeView() {        TextView t = new TextView(mContext);        t.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);        t.setMaxLines(1);        t.setPadding(mPadding, mPadding, mPadding, mPadding);        t.setTextColor(textColor);        t.setTextSize(mTextSize);        t.setClickable(true);        t.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                if (itemClickListener != null && textList.size() > 0 && currentId != -1) {                    itemClickListener.onItemClick(currentId % textList.size());                }            }        });        return t;    }    /**     * 设置点击事件监听     */    public void setOnItemClickListener(OnItemClickListener itemClickListener) {        this.itemClickListener = itemClickListener;    }    /**     * 轮播文本点击监听器     */    public interface OnItemClickListener {        /**         * 点击回调         *         * @param position 当前点击ID         */        public void onItemClick(int position);    }}

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