android自定义view圆形百分比progressBar√

前言

最近工作太不饱和，基本是这个节奏：
8.40到公司，吃个早餐，边吃边玩手机
9.消化一下，打开电脑看会新闻。阿三们又在搞事，反对made in china的产品、禁用几十款app，加上国安法在香港也有游行不服的，哎，我大清太难了
9.30-10.带薪拉屎时间
10.如果当天有茅台抢购，也是要打开京东抢一抢的，虽然东哥暂时还不认我这个兄弟
11.要开始做点事了（反正不是工作的事）
12.-1.30吃饭、午觉
14.把每个群的消息浏览一遍，最活跃的群非同学们的炒股群莫属（每天如此），都在讨论牛市要来了，准备进场一把梭哈。我也想试试，但是奈何钱不够，今天还要交房租。
15.要开始做点事了（一般是逛知乎、写博客）
16.下半场休息时间，这个时候一般抽根黄鹤楼斗斗地主，豆子很快就会输完，好在我有两个号，想骗我充值、看广告，不存在的
17.继续做“事”
18.准点下班（怪不好意思的）

h5、小程序开发倒是挺忙的，过几天要正儿八经学一下小程序，希望能一起帮前端的兄弟一起迭代之前的小程序。
现在呢，时间总不能浪费，写写blog吧，记录一下，说不定还能帮到需要的朋友。

进入正题，继续接着上一篇android自定义view实现进度条动画、按钮渐变及录制状态控制，趁热打铁，继续来画个进度条，这个跟上一篇实现方式类似，多了一个百分比数字显示以及完成后的√。

上效果：

没什么好解释的，直接上代码：

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import androidx.annotation.Nullable;

/**
 * 进度
 *
 * @author ly
 * date 2020/3/3 11:02
 */
public class CircleProgressView extends View {

    private static final int COMPLETE = 360;
    private int okSpeed = 3;

    private Paint paint;
    //进度圈颜色
    private int circleOutsideColor;
    //进度颜色
    private int circleProgressColor;
    private float progressW;
    //进度条圆圈半径
    private float circleProgressR;
    private OnProgressListener onProgressListener;

    private RectF progressRect;
    private float progress;
    private String progressText;
    private Path okPath;
    private int sX, sY;
    private int mX;
    private int eX;
    private int cX, cY;

    public CircleProgressView(Context context) {
        super(context);
        init();
    }

    public CircleProgressView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CircleProgressView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        circleOutsideColor = 0xffF2F4F5;
        circleProgressColor = 0xff6066DD;
        paint = new Paint();
        paint.setAntiAlias(true);//抗锯齿
        paint.setDither(true); //设置防抖动
    }

    /**
     * @param progress 已加载进度/总进度
     * @author ly on 2020/3/3 16:41
     */
    public void setProgress(float progress) {
        this.progress = progress * COMPLETE;
        if (this.progress >= COMPLETE) {//表示录制达到最大时长，自动结束
            this.progress = COMPLETE;
        }
        progressText = (int) (progress * 100) + "%";
        invalidate();
    }

    public void reset() {
        setProgress(0);

    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        if (circleProgressR == 0 || okPath == null) {
            int w = getWidth();
            progressW = w * 0.061f;
            circleProgressR = (w - progressW) / 2f;

            progressRect = new RectF(0 + progressW / 2, 0 + progressW / 2, w - progressW / 2, w - progressW / 2);

            int okW = (int) ((getWidth() - progressW) * 0.45);
            int okH = (int) ((getHeight() - progressW) * 0.32);

            cX = sX = (getWidth() - okW) / 2;
            cY = sY = getHeight() / 2;
            mX = (int) (sX + 0.39 * okW);
            int mY = (int) (sY + 0.35 * okW);
            eX = getWidth() - (getWidth() - okW) / 2;
            int eY = (getHeight() - okH) / 2;

            okPath = new Path();
            okPath.moveTo(sX, sY);
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        //画进度圈
        paint.setStyle(Paint.Style.STROKE);
        paint.setColor(circleOutsideColor);
        paint.setStrokeWidth(progressW);//设置画笔粗细
        canvas.drawCircle(getWidth() / 2f, getHeight() / 2f, circleProgressR, paint);

        //画进度就是圆弧
        //时钟3点的方向为0度，顺时钟方向为正，-90是圆弧的开始点，即12点位置开始，
        //sweepAngle扫过的角度，调整该值即可实现进度顺时针加载(0-360)
        paint.setColor(circleProgressColor);
        canvas.drawArc(progressRect, -90, progress, false, paint);

        if (progress < COMPLETE) {
            if (!TextUtils.isEmpty(progressText)) {
                // 将坐标原点移到控件中心
                int dx = getWidth() / 2;
                int dy = getHeight() / 2;
                canvas.translate(dx, dy);
                // 绘制居中文字
                paint.setTextSize(PixelUtil.sp2px(30));
                // 文字宽
                float textWidth = paint.measureText(progressText);
                // 文字baseline在y轴方向的位置
                float baseLineY = Math.abs(paint.ascent() + paint.descent()) / 2;
                paint.setStyle(Paint.Style.FILL);
//            paint.setStrokeWidth(2);
                canvas.drawText(progressText, -textWidth / 2, baseLineY, paint);
            }
        } else {//加载完成，画√
            if (cX < eX) {//来个动画凑合用
                cX += okSpeed;
                if (cX < mX) {
                    cY += okSpeed;
                } else {
                    cY -= okSpeed;
                }
                invalidate();
            } else {
                postDelayed(() -> {
                    if (onProgressListener != null)
                        onProgressListener.complete();
                }, 1500);
            }
            okPath.lineTo(cX, cY);
            canvas.drawPath(okPath, paint);
        }
    }

    public float getProgress() {
        return progress / COMPLETE;
    }

    public void setOnProgressListener(OnProgressListener onProgressListener) {
        this.onProgressListener = onProgressListener;
    }

    public interface OnProgressListener {
        void complete();
    }
}

还是说一下那个√的动画吧，其实是个规则的图形，都是直线。x轴的坐标是增加的，y坐标先递减再递增。由于要画的√的两条直线可拆分为两个等腰三角形对应的斜边，所以x和y坐标的增减量（okSpeed）都相等。这里有两个优化点：
1、okSpeed的值是固定的，可添加插值器来改变okSpeed的值，从而达到画√的速率
2、这个√的开始和结束的两端是直角，略生硬，可优化成圆角（画笔设置paint.setStrokeCap(Paint.Cap.ROUND)即可）
其他没什么好说的，上dialog的代码：

import android.content.Context;
import android.view.Gravity;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;

/**
 * @author ly
 * date 2019/8/1 17:36
 */
public class CircleProgressDialog extends BaseDialog {

    private CircleProgressView circleProgressView;
    private TextView tv_dialog_progress_status;
    private ImageView iv_dialog_progress_close;
    private OnProgressCallBack onProgressCallBack;

    public CircleProgressDialog(@NonNull Context context, OnProgressCallBack onProgressCallBack) {
        super(context);
        this.onProgressCallBack = onProgressCallBack;

    }

    @Override
    public int getLayoutResId() {
        return R.layout.v_dialog_circle_progress;
    }

    @Override
    public void initViews() {
        if (getWindow() != null) {
            getWindow().getAttributes().width = ScreenUtil.getScreenWidth() * 4 / 5;
            getWindow().setGravity(Gravity.CENTER);
        }
        setCanceledOnTouchOutside(false);
        setCancelable(false);

        circleProgressView = findViewById(R.id.circleProgressView);
        tv_dialog_progress_status = findViewById(R.id.tv_dialog_progress_status);
        iv_dialog_progress_close = findViewById(R.id.iv_dialog_progress_close);
        iv_dialog_progress_close.setOnClickListener(v -> {
            if (onProgressCallBack != null)
                onProgressCallBack.intoNextPage();
            dismiss();
        });
        iv_dialog_progress_close.setVisibility(View.GONE);

        circleProgressView.setOnProgressListener(() -> {
            if (onProgressCallBack != null)
                onProgressCallBack.intoNextPage();
            dismiss();
        });
        setOnDismissListener(dialog -> circleProgressView.reset());
    }

    public void setProgress(float progress) {
        circleProgressView.setProgress(progress);
        if (progress >= 1) {
            tv_dialog_progress_status.setText("发布成功");
            iv_dialog_progress_close.setVisibility(View.VISIBLE);
        } else {
            tv_dialog_progress_status.setText("正在发布中...");
            iv_dialog_progress_close.setVisibility(View.GONE);
        }
    }

    public float getProgress() {
        return circleProgressView.getProgress();
    }

    public interface OnProgressCallBack {
        void intoNextPage();
    }
}

v_dialog_circle_progress:

最后给个fake进度，就可以看到效果啦：

   private ScheduledFuture scheduledFuture;
   private void fakeProgress() {
    	CircleProgressDialog circleProgressDialog = new CircleProgressDialog(this, () -> {});
   		circleProgressDialog.show();
        scheduledFuture = ExecutorServiceManager.get().getExecutorService().scheduleWithFixedDelay(() -> {
            runOnUiThread(() -> {
                float progress = circleProgressDialog.getProgress();
                if (!circleProgressDialog.isShowing() || videoNoteInfo != null) {
                    if (scheduledFuture != null)
                        scheduledFuture.cancel(true);
                    scheduledFuture = null;
                    return;
                }
                progress += 0.006f;
                circleProgressDialog.setProgress(progress);
            });
        }, 0, 20, TimeUnit.MILLISECONDS);
    }

如果对大家有帮助，请点个赞以鼓励我不断前进~

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