package com.djt.aienglish.widget;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Build;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;

import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;

import com.djt.aienglish.R;

/**
 * 分段式進(jìn)度條
 *
 * @author qiu
 * @date 2021/3/2 14:34
 */
public class SegmentProgressBar extends View {
    /**
     * 設(shè)置各種默認(rèn)值
     */
    private static final int DEFAULT_HEIGHT_PROGRESS_BAR = 10;
    /**
     * 進(jìn)度條圓角
     */
    private static final float mRadius = 60;
    /**
     * 背景色
     */
    private int defaultBackgroundColor = Color.parseColor("#DDE4F4");
    /**
     * 進(jìn)度條顏色
     */
    private int defaultProgressBarColor = Color.parseColor("#3D7EFE");

    /**
     * 所有畫圖所用的畫筆
     */
    protected Paint mPaint = new Paint();
    /**
     * 進(jìn)度條間距
     */
    protected float mOffset = 0;
    protected float mDefaultOffset = 10;

    /**
     * 進(jìn)度條高度
     */
    protected int mProgressBarHeight = dp2px(DEFAULT_HEIGHT_PROGRESS_BAR);

    /**
     * 除padding外的視圖寬度
     */
    protected float mRealWidth;
    /**
     * 最大值
     */
    private int mMax = 100;
    /**
     * 當(dāng)前進(jìn)度
     */
    private int mProgress = 0;
    /**
     * 分段寬度
     */
    private float progressWith = 0;


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

    public SegmentProgressBar(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

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

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public SegmentProgressBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        initDefaultValues(context, attrs, defStyleAttr);
        init();
    }

    /**
     * 初始化布局
     *
     * @param context
     * @param attrs
     * @param defStyleAttr
     */
    private void initDefaultValues(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        TypedArray arr =
                context.obtainStyledAttributes(attrs, R.styleable.ProgressBar, defStyleAttr, defStyleAttr);
        if (arr != null) {
            mProgress = arr.getInt(R.styleable.ProgressBar_progress, 0);
            mMax = arr.getInt(R.styleable.ProgressBar_max, 0);
            defaultBackgroundColor = arr.getColor(R.styleable.ProgressBar_progressBackground, Color.parseColor("#DDE4F4"));
            defaultProgressBarColor = arr.getColor(R.styleable.ProgressBar_progressBarColor, Color.parseColor("#3D7EFE"));
        }
        arr.recycle();
    }


    /**
     * 初始化布局
     */
    private void init() {
    }


    /**
     * 最大值
     *
     * @param max
     */
    public void setMax(int max) {
        this.mMax = max;
        if (max > 0) {
            mOffset = mRealWidth / mMax / 8;
            if (mOffset > mDefaultOffset) {
                mOffset = mDefaultOffset;
            }
            progressWith = (mRealWidth - (mMax - 1) * mOffset) / mMax;
        }
        invalidate();
    }

    /**
     * 進(jìn)度值
     *
     * @param progress
     */
    public void setProgress(int progress) {
        this.mProgress = progress;
        invalidate();
    }

    @Override
    protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);
        //高度
        int height = measureHeight(heightMeasureSpec);
        //必須調(diào)用該方法來存儲(chǔ)View經(jīng)過測量的到的寬度和高度
        setMeasuredDimension(width, height);
        //真正的寬度值是減去左右padding
        mRealWidth = getMeasuredWidth() - getPaddingRight() - getPaddingLeft();
        //使用畫筆在畫布上繪制進(jìn)度
        if (mMax > 0) {
            mOffset = mRealWidth / mMax / 8;
            if (mOffset > mDefaultOffset) {
                mOffset = mDefaultOffset;
            }
            progressWith = (mRealWidth - (mMax - 1) * mOffset) / mMax;
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        //真正的寬度值是減去左右padding
        mRealWidth = w - getPaddingRight() - getPaddingLeft();
        //使用畫筆在畫布上繪制進(jìn)度
        if (mMax > 0) {
            mOffset = mRealWidth / mMax / 8;
            if (mOffset > mDefaultOffset) {
                mOffset = mDefaultOffset;
            }
            progressWith = (mRealWidth - (mMax - 1) * mOffset) / mMax;
        }
        invalidate();
    }

    /**
     * EXACTLY：父控件告訴我們子控件了一個(gè)確定的大小，你就按這個(gè)大小來布局。比如我們指定了確定的dp值和macth_parent的情況。
     * AT_MOST：當(dāng)前控件不能超過一個(gè)固定的最大值，一般是wrap_content的情況。
     * UNSPECIFIED:當(dāng)前控件沒有限制，要多大就有多大，這種情況很少出現(xiàn)。
     *
     * @param measureSpec
     * @return 視圖的高度
     */
    private int measureHeight(int measureSpec) {
        int result = 0;
        //父布局告訴我們控件的類型
        int specMode = MeasureSpec.getMode(measureSpec);
        //父布局傳過來的視圖大小
        int specSize = MeasureSpec.getSize(measureSpec);
        if (specMode == MeasureSpec.EXACTLY) {
            result = specSize;
        } else {
            result = (int) (getPaddingTop() + getPaddingBottom() + mProgressBarHeight);
            if (specMode == MeasureSpec.AT_MOST) {
                result = Math.min(result, specSize);
            }
        }
        return result;
    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    @Override
    protected synchronized void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        mPaint.setColor(defaultBackgroundColor);
        //設(shè)置畫筆類型
        mPaint.setStyle(Paint.Style.FILL);
        //去除鋸齒
        mPaint.setAntiAlias(true);
        //使用畫筆在畫布上繪制背景
        canvas.drawRoundRect(0, 0, mRealWidth, getHeight(), mRadius, mRadius, mPaint);
        //繪制進(jìn)度條
        mPaint.setColor(defaultProgressBarColor);
        for (int i = 0; i < mProgress; i++) {
            canvas.drawRoundRect(i * (progressWith + mOffset), 0, progressWith + i * (progressWith + mOffset), getHeight(), mRadius, mRadius, mPaint);
        }
    }

    /**
     * dp 2 px
     *
     * @param dpVal
     */
    protected int dp2px(int dpVal) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                dpVal, getResources().getDisplayMetrics());
    }
}

<!--分段式進(jìn)度條-->
    <declare-styleable name="ProgressBar">
        <attr name="progress" format="integer" />
     <attr name="max" format="integer" />
        <attr name="progressBarColor" format="color" />
        <attr name="progressBackground" format="color" />
</declare-styleable>

<com.djt.aienglish.widget.SegmentProgressBar
                    android:id="@+id/spb"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    app:max="10"
                    app:progress="1" />