Android自定義控制元件(高手級)--JOJO同款能力分析圖

JOJO是我看過腦洞最大的動漫(沒有之一),每季必追
最近打算做簡歷，想自定義個能力分析圖，首先就想到這裡：
廢話不多說，走起，噢啦，噢啦，噢啦，噢啦...

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一、靜態圖的繪製

1.繪製外圈

為了減少變數值，讓尺寸具有很好的聯動性(等比擴縮),小黑條的長寬將取決於最大半徑mRadius
則：小黑條長:mRadius*0.08 小黑條寬:mRadius*0.05 所以r2=mRadius-mRadius*0.08

public class AbilityView extends View {
    private float mRadius = dp(100);//外圓半徑
    private float mLineWidth = dp(1);//線寬

    private Paint mLinePaint;//線畫筆
    private Paint mFillPaint;//填充畫筆

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

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

    public AbilityView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        init();
    }

    private void init() {
        mLinePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mLinePaint.setStrokeWidth(mLineWidth);
        mLinePaint.setStyle(Paint.Style.STROKE);

        mFillPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mFillPaint.setStrokeWidth(0.05f * mRadius);

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.translate(mRadius, mRadius);//移動座標系
        drawOutCircle(canvas);
    }

    /**
     * 繪製外圈
     * @param canvas 畫布
     */
    private void drawOutCircle(Canvas canvas) {
        canvas.save();
        canvas.drawCircle(0, 0, mRadius, mLinePaint);
        float r2 = mRadius - 0.08f * mRadius;//下圓半徑
        canvas.drawCircle(0, 0, r2, mLinePaint);
        for (int i = 0; i < 22; i++) {//迴圈畫出小黑條
            canvas.save();
            canvas.rotate(360 / 22f * i);
            canvas.drawLine(0, -mRadius, 0, -r2, mFillPaint);
            canvas.restore();
        }
        canvas.restore();
    }

    protected float dp(float dp) {
        return TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, dp, getResources().getDisplayMetrics());
    }
}
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2.內圈繪製

同樣尺寸和最外圓看齊，這裡繪製有一丟丟複雜，你需要了解canvas和path的使用
看不懂的可轉到canvas和path,如果看了這兩篇還問繪製有什麼技巧的，可轉到這裡,會告訴你技巧是什麼

/**
 * 繪製內圈圓
 * @param canvas 畫布
 */
private void drawInnerCircle(Canvas canvas) {
    canvas.save();
    float innerRadius = 0.6f * mRadius;
    canvas.drawCircle(0, 0, innerRadius, mLinePaint);
    canvas.save();
    for (int i = 0; i < 6; i++) {//遍歷6條線
        canvas.save();
        canvas.rotate(60 * i);//每次旋轉60°
        mPath.moveTo(0, -innerRadius);
        mPath.rLineTo(0, innerRadius);//線的路徑
        for (int j = 1; j < 6; j++) {
            mPath.moveTo(-mRadius * 0.02f, innerRadius / 6 * j);
            mPath.rLineTo(mRadius * 0.02f * 2, 0);
        }//加5條小線
        canvas.drawPath(mPath, mLinePaint);//繪製線
        canvas.restore();
    }
    canvas.restore();
}
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3.文字的繪製

文字的方向同向，感覺這樣看著好些，不管怎麼轉都可以

//定義測試資料
mAbilityInfo = new String[]{"破壞力", "速度", "射程距離", "持久力", "精密度", "成長性"};
mAbilityMark = new int[]{100, 100, 60, 100, 100, 100};
mMarkMapper = new String[]{"A", "B", "C", "D", "E"};
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/**
 * 繪製文字
 *
 * @param canvas 畫布
 */
private void drawInfoText(Canvas canvas) {
    float r2 = mRadius - 0.08f * mRadius;//下圓半徑
    for (int i = 0; i < 6; i++) {
        canvas.save();
        canvas.rotate(60 * i + 180);
        mTextPaint.setTextSize(mRadius * 0.1f);
        canvas.drawText(mAbilityInfo[i], 0, r2 - 0.06f * mRadius, mTextPaint);
        mTextPaint.setTextSize(mRadius * 0.15f);
        canvas.drawText(abilityMark2Str(mAbilityMark[i]), 0, r2 - 0.18f * mRadius, mTextPaint);
        canvas.restore();
    }
    mTextPaint.setTextSize(mRadius * 0.07f);
    for (int k = 0; k < 5; k++) {
        canvas.drawText(mMarkMapper[k], mRadius * 0.06f, mInnerRadius / 6 * (k + 1) + mRadius * 0.02f - mInnerRadius, mTextPaint);
    }
}

/**
 * 將分數對映成字串
 * @param mark 分數100~0
 * @return
 */
private String abilityMark2Str(int mark) {
    if (mark <= 100 && mark > 80) {
        return mMarkMapper[0];
    } else if (mark <= 80 && mark > 60) {
        return mMarkMapper[1];
    } else if (mark <= 60 && mark > 40) {
        return mMarkMapper[2];
    } else if (mark <= 40 && mark > 20) {
        return mMarkMapper[3];
    } else if (mark <= 20 && mark > 0) {
        return mMarkMapper[4];
    }
    return "∞";
}
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4.最後一步：畫內容

本以為就連個點的事，沒想到...打了我半頁草稿紙(手動表情--可怕)
展現在你眼前的就是個for迴圈而已，實際上都是通過一點點分析,測試與發現規律算出來的
有什麼技巧?草稿紙拿出來畫圖，計算+分析...,只靠眼睛是不行的

//我不喜歡弄髒畫筆，再準備一支吧
mAbilityPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mAbilityPaint.setColor(0x8897C5FE);
mAbilityPath = new Path();
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/**
 * 繪製能力面
 * @param canvas
 */
private void drawAbility(Canvas canvas) {
    float step = mInnerRadius / 6;//每小段的長度
    mAbilityPath.moveTo(0, -mAbilityMark[0] / 20.f * step);//起點
    for (int i = 1; i < 6; i++) {
        float mark = mAbilityMark[i] / 20.f;
        mAbilityPath.lineTo(
                (float) (mark * step * Math.cos(Math.PI/180*(-30+60*(i-1)))),
                (float) (mark * step * Math.sin(Math.PI/180*(-30+60*(i-1)))));
    }
    mAbilityPath.close();
    canvas.drawPath(mAbilityPath, mAbilityPaint);
}
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這樣就完成了,你以為這樣就結束了?這才剛開始呢!

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二、資料的提取與封裝

剛才用的是測試資料，都寫死在View中，這肯定是不行的
現在將資料封裝一下，再暴露介面方法,開啟View和外界的通路

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1.View的尺寸限定

使用寬度作為直徑,無視高度,尺寸為圓形區域
如下所示：可看出所有的尺寸都是和按照mRadius來確定的，所以縮放時也會等比

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    mRadius = MeasureSpec.getSize(widthMeasureSpec) / 2;
    mInnerRadius = 0.6f * mRadius;
    setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(widthMeasureSpec));
}
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2.資料處理

為了方便檢視資料間關係，使用Map將能力與數值裝一下

private HashMap<String, Integer> mData;//核心資料

//資料的剛才的對接
mData = new HashMap<>();
mData.put("破壞力", 100);
mData.put("速度", 100);
mData.put("射程距離", 60);
mData.put("持久力", 100);
mData.put("精密度", 100);
mData.put("成長性", 100);

mAbilityInfo = mData.keySet().toArray(new String[mData.size()]);
mAbilityMark = mData.values().toArray(new Integer[mData.size()]);
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3.資料與字元的對映關係：DataMapper

也就是100~80之間的代表字串可以自定義，比如"1" 、 "I" 、"☆"隨你便
這也是我剛悟到的一種解耦方式，應該算是策略設計模式吧(只能分五個等級)
如果自定義分類情況重寫abilityMark2Str方法就行了

/**
 * 作者：張風捷特烈<br/>
 * 時間：2018/12/28 0028:12:21<br/>
 * 郵箱：1981462002@qq.com<br/>
 * 說明：資料對映抽象類
 */
public class DataMapper {
    protected String[] mapper;

    public DataMapper(String[] mapper) {
        if (mapper.length != 5) {
          throw new IllegalArgumentException("the length of mapper must be 5");
        }
        this.mapper = mapper;
    }
    
    public String[] getMapper() {
        return mapper;
    }

    /**
     * 數值與字串的對映關係
     *
     * @param mark 數值
     * @return 字串
     */
    public String abilityMark2Str(int mark) {
        if (mark <= 100 && mark > 80) {
            return mapper[0];
        } else if (mark <= 80 && mark > 60) {
            return mapper[1];

        } else if (mark <= 60 && mark > 40) {
            return mapper[2];

        } else if (mark <= 40 && mark > 20) {
            return mapper[3];

        } else if (mark <= 20 && mark > 0) {
            return mapper[4];
        }
        return "∞";
    }
}
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給一個預設的對映類：WordMapper
也就是剛才在View裡寫的那個方法

/**
 * 作者：張風捷特烈<br/>
 * 時間：2018/12/28 0028:12:24<br/>
 * 郵箱：1981462002@qq.com<br/>
 * 說明：單詞對映
 */
public class WordMapper extends DataMapper {

    public WordMapper() {
        super(new String[]{"A", "B", "C", "D", "E"});
    }
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View裡如何修改呢?

//定義成員變數
private DataMapper mDataMapper;//資料與字串對映規則

//init裡
mDataMapper = new WordMapper();//初始化DataMapper--預設WordMapper

//繪製文字的時候由mDataMapper提供資料
private void drawInfoText(Canvas canvas) {
    float r2 = mRadius - 0.08f * mRadius;//下圓半徑
    for (int i = 0; i < 6; i++) {
        canvas.save();
        canvas.rotate(60 * i + 180);
        mTextPaint.setTextSize(mRadius * 0.1f);
        canvas.drawText(mAbilityInfo[i], 0, r2 - 0.06f * mRadius, mTextPaint);
        mTextPaint.setTextSize(mRadius * 0.15f);
        canvas.drawText(
                mDataMapper.abilityMark2Str(mAbilityMark[i]), 0, r2 - 0.18f * mRadius, mTextPaint);
        canvas.restore();
    }
    mTextPaint.setTextSize(mRadius * 0.07f);
    for (int k = 0; k < 5; k++) {
        canvas.drawText(mDataMapper.getMapper()[k], mRadius * 0.06f, mInnerRadius / 6 * (k + 1) + mRadius * 0.02f - mInnerRadius, mTextPaint);
    }
}

//暴漏get、set方法---提供外界設定
public DataMapper getDataMapper() {
    return mDataMapper;
}

public void setDataMapper(DataMapper dataMapper) {
    mDataMapper = dataMapper;
}

//暴漏設定資料方法給外部
public HashMap<String, Integer> getData() {
    return mData;
}

public void setData(HashMap<String, Integer> data) {
    mData = data;
    mAbilityInfo = mData.keySet().toArray(new String[mData.size()]);
    mAbilityMark = mData.values().toArray(new Integer[mData.size()]);
    invalidate();
}
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4.使用方法：

使用DataMapper將字串抽離出來，並且還可以根據數值來主要以返回字串

AbilityView abilityView = findViewById(R.id.id_ability_view);
mData = new HashMap<>();
mData.put("Java", 100);
mData.put("Kotlin", 70);
mData.put("JavaScript", 100);
mData.put("Python", 60);
mData.put("Dart", 50);
mData.put("C++", 60);
abilityView.setDataMapper(new DataMapper(new String[]{"神", "高", "普", "新", "入"}));
abilityView.setData(mData);
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ok,搞定,你以為完了?No,精彩繼續

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三、n條屬性任你比

搞了個6個，不得了了嗎?可見其中還有一個死的東西，那就是資料條數
這個就麻煩了,如果剛才是0->1的創造，填充資料是1->2的積累，那接下來就是2->n的生命
好吧，我又打了半張草稿紙，終於算完了!View一共不到200行程式碼,感覺很優雅了
有興趣的自己研究(畫畫圖，打打草稿)，沒興趣的直接拿去用,

/**
 * 作者：張風捷特烈<br/>
 * 時間：2018/12/28 0028:7:40<br/>
 * 郵箱：1981462002@qq.com<br/>
 * 說明：能力對比圖
 */
public class AbilityView extends View {
    private static final String TAG = "AbilityView";
    private float mRadius = dp(100);//外圓半徑
    private float mLineWidth = dp(1);//線寬
    private Paint mLinePaint;//線畫筆
    private Paint mFillPaint;//填充畫筆
    private Path mPath;
    private HashMap<String, Integer> mData;//核心資料
    private Paint mTextPaint;
    String[] mAbilityInfo;
    Integer[] mAbilityMark;
    private float mInnerRadius;
    private Path mAbilityPath;
    private Paint mAbilityPaint;
    private DataMapper mDataMapper;//資料與字串對映規則

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

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

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

    private void init() {
        mLinePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mLinePaint.setStrokeWidth(mLineWidth);
        mLinePaint.setStyle(Paint.Style.STROKE);
        mFillPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mFillPaint.setStrokeWidth(0.05f * mRadius);
        mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mTextPaint.setTextSize(mRadius * 0.1f);
        mTextPaint.setTextAlign(Paint.Align.CENTER);
        mAbilityPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mAbilityPaint.setColor(0x8897C5FE);
        mAbilityPath = new Path();
        mPath = new Path();
        mData = new HashMap<>();
        mDataMapper = new WordMapper();//初始化DataMapper--預設WordMapper
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        mRadius = MeasureSpec.getSize(widthMeasureSpec) / 2;
        mInnerRadius = 0.6f * mRadius;
        setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(widthMeasureSpec));
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (mAbilityInfo == null) {
            return;
        }
        canvas.translate(mRadius, mRadius);//移動座標系
        drawOutCircle(canvas);
        drawInnerCircle(canvas);
        drawInfoText(canvas);
        drawAbility(canvas);
    }

    /**
     * 繪製能力面
     *
     * @param canvas
     */
    private void drawAbility(Canvas canvas) {
        float step = mInnerRadius / (mDataMapper.getMapper().length + 1);//每小段的長度
        mAbilityPath.moveTo(0, -mAbilityMark[0] / 20.f * step);//起點
        for (int i = 1; i < mData.size(); i++) {
            float mark = mAbilityMark[i] / 20.f;
            mAbilityPath.lineTo(
                    (float) (mark * step * Math.cos(Math.PI / 180 * (360.f / mData.size() * i - 90))),
                    (float) (mark * step * Math.sin(Math.PI / 180 * (360.f / mData.size() * i - 90))));
        }
        mAbilityPath.close();
        canvas.drawPath(mAbilityPath, mAbilityPaint);
    }

    /**
     * 繪製文字
     *
     * @param canvas 畫布
     */
    private void drawInfoText(Canvas canvas) {
        float r2 = mRadius - 0.08f * mRadius;//下圓半徑
        for (int i = 0; i < mData.size(); i++) {
            canvas.save();
            canvas.rotate(360.f / mData.size() * i + 180);
            mTextPaint.setTextSize(mRadius * 0.1f);
            canvas.drawText(mAbilityInfo[i], 0, r2 - 0.06f * mRadius, mTextPaint);
            mTextPaint.setTextSize(mRadius * 0.15f);
            canvas.drawText(
                    mDataMapper.abilityMark2Str(mAbilityMark[i]), 0, r2 - 0.18f * mRadius, mTextPaint);
            canvas.restore();
        }
        mTextPaint.setTextSize(mRadius * 0.07f);
        for (int k = 0; k < mDataMapper.getMapper().length; k++) {
            canvas.drawText(mDataMapper.getMapper()[k], mRadius * 0.06f,
                    mInnerRadius / (mDataMapper.getMapper().length + 1) * (k + 1) + mRadius * 0.02f - mInnerRadius, mTextPaint);
        }
    }

    /**
     * 繪製內圈圓
     *
     * @param canvas 畫布
     */
    private void drawInnerCircle(Canvas canvas) {
        canvas.save();
        canvas.drawCircle(0, 0, mInnerRadius, mLinePaint);
        canvas.save();
        for (int i = 0; i < mData.size(); i++) {//遍歷6條線
            canvas.save();
            canvas.rotate(360.f / mData.size() * i);//每次旋轉60°
            mPath.moveTo(0, -mInnerRadius);
            mPath.rLineTo(0, mInnerRadius);//線的路徑
            for (int j = 1; j <= mDataMapper.getMapper().length; j++) {
                mPath.moveTo(-mRadius * 0.02f, -mInnerRadius / (mDataMapper.getMapper().length + 1) * j);
                mPath.rLineTo(mRadius * 0.02f * 2, 0);
            }//加5條小線

            canvas.drawPath(mPath, mLinePaint);//繪製線
            canvas.restore();
        }
        canvas.restore();
    }

    /**
     * 繪製外圈
     *
     * @param canvas 畫布
     */
    private void drawOutCircle(Canvas canvas) {
        canvas.save();
        canvas.drawCircle(0, 0, mRadius, mLinePaint);
        float r2 = mRadius - 0.08f * mRadius;//下圓半徑
        canvas.drawCircle(0, 0, r2, mLinePaint);
        for (int i = 0; i < 22; i++) {//迴圈畫出小黑條
            canvas.save();
            canvas.rotate(360 / 22f * i);
            canvas.drawLine(0, -mRadius, 0, -r2, mFillPaint);
            canvas.restore();
        }
        canvas.restore();
    }

    protected float dp(float dp) {
        return TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, dp, getResources().getDisplayMetrics());
    }

    /////////////////////////////---------------------
    public float getRadius() {
        return mRadius;
    }

    public void setRadius(float radius) {
        mRadius = radius;
    }

    public DataMapper getDataMapper() {
        return mDataMapper;
    }

    public void setDataMapper(DataMapper dataMapper) {
        mDataMapper = dataMapper;
    }

    public HashMap<String, Integer> getData() {
        return mData;
    }

    public void setData(HashMap<String, Integer> data) {
        mData = data;
        mAbilityInfo = mData.keySet().toArray(new String[mData.size()]);
        mAbilityMark = mData.values().toArray(new Integer[mData.size()]);
        invalidate();
    }
}

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好了，這下真的結束了

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後記：捷文規範

1.本文成長記錄及勘誤表

專案原始碼	日期	備註
V0.1--github	2018-12-28	Android自定義控制元件(高手級)--JOJO同款能力分析圖

2.更多關於我

筆名	QQ	微信	愛好
張風捷特烈	1981462002	zdl1994328	語言
我的github	我的簡書	我的掘金	個人網站

3.宣告

1----本文由張風捷特烈原創,轉載請註明
2----歡迎廣大程式設計愛好者共同交流
3----個人能力有限，如有不正之處歡迎大家批評指證，必定虛心改正
4----看到這裡，我在此感謝你的喜歡與支援

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