適用于啟動(dòng)頁的幾秒倒計(jì)時(shí)進(jìn)入主頁使用：

package com.example.zd.baselibrary.view;

import android.animation.ValueAnimator;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.v7.widget.AppCompatTextView;
import android.util.AttributeSet;
import android.view.animation.LinearInterpolator;

/**
 * Package: com.example.zd.baselibrary.view
 * <p>
 * describe: 倒計(jì)時(shí)的自定義TextView
 *
 * @author zhangdong on 2019/10/24 0024.
 * @version 1.0
 * @see .
 * @since 1.0
 */
public class CountdownView extends AppCompatTextView {

    private static int MAX_TIME = 5;            //最大倒計(jì)時(shí)時(shí)間
    private String CONCAT_STR = "s跳過";         //默認(rèn)倒計(jì)時(shí)后面顯示的文字
    private int updateTime = 0;                 //當(dāng)前倒計(jì)時(shí)時(shí)間
    private int bgColor = Color.GRAY;           //背景顏色
    private int bgCorner = 10;                  //有設(shè)置畫的背景時(shí)默認(rèn)圓角10dp
    private BgStyle bgStyle = BgStyle.CLEAR;    //背景樣式
    private Paint mPaint;                       //繪制背景的畫筆
    private int vW, vH;                         //此view的寬\高
    private ValueAnimator valueAnimator;        //動(dòng)畫，通過動(dòng)畫的進(jìn)度來控制view的文字繪制
    private CountdownEndListener endListener;   //倒計(jì)時(shí)結(jié)束

    //背景樣式
    public enum BgStyle {
        LINE,   //一圈線
        FILL,   //填充背景
        CLEAR   //沒有背景  可以自己設(shè)置background
    }

    /**
     * 設(shè)置倒計(jì)時(shí)結(jié)束監(jiān)聽
     *
     * @param endListener .
     * @return thisView
     */
    public CountdownView setEndListener(CountdownEndListener endListener) {
        this.endListener = endListener;
        return this;
    }

    /**
     * 設(shè)置倒計(jì)時(shí)時(shí)間 (單位s)
     *
     * @param maxTime 最大時(shí)間 default 5 ms
     * @return thisView
     */
    public CountdownView setMaxTime(int maxTime) {
        MAX_TIME = maxTime;
        return this;
    }

    /**
     * 設(shè)置倒計(jì)時(shí)后面拼接的字符串
     *
     * @param concatStr eg:"s跳過"
     * @return thisView
     */
    public CountdownView setConcatStr(String concatStr) {
        this.CONCAT_STR = concatStr;
        return this;
    }

    /**
     * 設(shè)置背景樣式
     *
     * @param bgStyle 背景樣式 默認(rèn)無
     * @return thisView
     */
    public CountdownView setBgStyle(BgStyle bgStyle) {
        this.bgStyle = bgStyle;
        invalidate();
        return this;
    }

    /**
     * 設(shè)置背景圓角大小 （單位dp）
     *
     * @param bgCorner 圓角大小
     * @return thisView
     */
    public CountdownView setBgCorner(int bgCorner) {
        this.bgCorner = bgCorner;
        invalidate();
        return this;
    }

    /**
     * 存在背景時(shí)，背景的顏色
     *
     * @param bgColor 顏色值
     * @return thisView
     */
    public CountdownView setBgColor(int bgColor) {
        this.bgColor = bgColor;
        invalidate();
        return this;
    }

    public CountdownView(Context context) {
        this(context, null);
    }

    public CountdownView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CountdownView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        vW = w;
        vH = h;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        //繪制背景
        drawBgShape(canvas);

        //textView顯示文字
        super.onDraw(canvas);
    }

    @SuppressLint("NewApi")
    private void drawBgShape(Canvas canvas) {
        switch (bgStyle) {
            case LINE:
                //畫線模式
                mPaint.setStyle(Paint.Style.STROKE);
                break;
            case FILL:
                //填充模式
                mPaint.setStyle(Paint.Style.FILL);
                break;
            case CLEAR:
                //不畫背景
                return;
            default:
                return;
        }
        //清除原背景
        setBackgroundResource(0);
        //畫背景
        mPaint.setColor(bgColor);

        int minW = Math.min(vW, vH);
        //圓角大小
        if (bgCorner > (minW >> 1))
            bgCorner = (minW >> 1);
        //圓角小于0的情況不存在 強(qiáng)制為0
        if (bgCorner < 0)
            bgCorner = 0;

        canvas.save();
        canvas.drawRoundRect(0, 0, vW, vH,
                dp2Px(getContext(), bgCorner), dp2Px(getContext(), bgCorner), mPaint);
        canvas.restore();
    }

    /**
     * 獲取當(dāng)前應(yīng)該顯示的文字內(nèi)容
     *
     * @return .
     */
    private String getShouldShowText() {
        if (updateTime != 0)
            return String.valueOf(updateTime).concat(CONCAT_STR);
        else
            return CONCAT_STR.substring(1);
    }

    /**
     * 倒計(jì)時(shí)開始
     */
    public synchronized void timeStart() {
        startAnimation();
    }

    /**
     * 倒計(jì)時(shí)結(jié)束；或者手動(dòng)調(diào)用此方法結(jié)束倒計(jì)時(shí)動(dòng)畫
     */
    public synchronized void timeEnd() {
        if (valueAnimator != null) {
            //停止動(dòng)畫，清空動(dòng)畫資源
            if (valueAnimator.isRunning()) {
                valueAnimator.cancel();
            }
            valueAnimator.removeAllUpdateListeners();
            valueAnimator = null;
        }
    }

    private void startAnimation() {
        if (null == valueAnimator) {
            valueAnimator = ValueAnimator.ofInt(MAX_TIME, 0);
            //動(dòng)畫進(jìn)度監(jiān)聽
            valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    //當(dāng)前進(jìn)度值
                    int value = (int) animation.getAnimatedValue();
                    if (updateTime != value) {
                        //重置倒計(jì)時(shí)時(shí)間，
                        updateTime = value;

                        //重新繪制view顯示文字
                        setText(getShouldShowText());

                        //倒計(jì)時(shí)結(jié)束的回調(diào)
                        if (updateTime == 0 && null != endListener)
                            endListener.countdownEnd();
                    }
                }
            });
            //設(shè)置勻速差值器
            valueAnimator.setInterpolator(new LinearInterpolator());
        }
        if (valueAnimator.isRunning())
            return;
        //設(shè)置動(dòng)畫執(zhí)行時(shí)間
        valueAnimator.setDuration(MAX_TIME * 1000);

        valueAnimator.start();
    }

    @Override
    protected void onDetachedFromWindow() {
        //銷毀時(shí)，清空動(dòng)畫
        timeEnd();
        super.onDetachedFromWindow();
    }

    private static int dp2Px(Context context, float dpValue) {
        float density = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * density);
    }

    /**
     * 倒計(jì)時(shí)結(jié)束監(jiān)聽
     */
    public interface CountdownEndListener {
        //倒計(jì)時(shí)結(jié)束
        void countdownEnd();
    }

}

使用：

正常textView的相關(guān)設(shè)置，主要設(shè)置字體大小、顏色等

然后代碼設(shè)置相關(guān)屬性，開始倒計(jì)時(shí)：

final CountdownView countdownView = (CountdownView) findViewById(R.id.view);

        //點(diǎn)擊view時(shí)停止倒計(jì)時(shí)
        countdownView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //調(diào)用view停止倒計(jì)時(shí)方法
                countdownView.timeEnd();
                //去吧皮卡丘
                Toast.makeText(MainActivity.this, "點(diǎn)擊結(jié)束倒計(jì)時(shí)", Toast.LENGTH_SHORT).show();
            }
        });

        //倒計(jì)時(shí)view相關(guān)設(shè)置
        countdownView.setMaxTime(5)                     //倒計(jì)時(shí)時(shí)間，單位秒
                .setConcatStr("s跳過廣告頁")              //倒計(jì)時(shí)后面拼接的字符串
                .setBgStyle(CountdownView.BgStyle.FILL) //背景樣式 LINE：線  FILL:填充  CLEAR:不需要通過代碼畫背景
                .setBgColor(Color.RED)                  //要畫背景的顏色值
                .setBgCorner(40)                        //要畫背景的圓角值 單位dp
                .setEndListener(new CountdownView.CountdownEndListener() { //倒計(jì)時(shí)結(jié)束的回調(diào)監(jiān)聽
                    @Override
                    public void countdownEnd() {
                        //倒計(jì)時(shí)結(jié)束，去吧皮卡丘
                        Toast.makeText(MainActivity.this, "倒計(jì)時(shí)結(jié)束", Toast.LENGTH_SHORT).show();
                    }
                })
                .timeStart(); //開始倒計(jì)時(shí)

效果圖：

image.png