Android 自定義View實現芝麻分曲線圖效果

1.簡介

其實這個效果幾天之前就寫了，但是一直沒有更新博客，本來想著把芝麻分雷達圖也做好再發博客的，然後今天看到鴻洋的微信公眾號有朋友發了芝麻分的雷達圖，所以就算了，算是一個互補吧。平時文章也寫的比較少，所以可能有點雜亂，有什麼需要改進的地方歡迎給出建議，不勝感激。

效果圖：

2.步驟：

初始化View的屬性
初始化畫筆
繪制代表最高分和最低分的兩根虛線
繪制文字
繪制代表月份的屬性
繪制芝麻分折線
繪制代表芝麻分的圓點
繪制選中分數的懸浮文字以及背景
處理點擊事件

3.編碼：

初始化View屬性

/**
* 初始化布局配置
*
* @param context
* @param attrs
*/
private void initConfig(Context context, AttributeSet attrs)
{
TypedArray a = context.obtainStyledAttributes(attrs,R.styleable.ScoreTrend);
maxScore=a.getInt(R.styleable.ScoreTrend_max_score,700);
minScore=a.getInt(R.styleable.ScoreTrend_min_score,650);
brokenLineColor=a.getColor(R.styleable.ScoreTrend_broken_line_color,brokenLineColor);
a.recycle();
}

初始化畫筆：

private void init()
{
brokenPath = new Path();
brokenPaint = new Paint();
brokenPaint.setAntiAlias(true);
brokenPaint.setStyle(Paint.Style.STROKE);
brokenPaint.setStrokeWidth(dipToPx(brokenLineWith));
brokenPaint.setStrokeCap(Paint.Cap.ROUND);
straightPaint = new Paint();
straightPaint.setAntiAlias(true);
straightPaint.setStyle(Paint.Style.STROKE);
straightPaint.setStrokeWidth(brokenLineWith);
straightPaint.setColor((straightLineColor));
straightPaint.setStrokeCap(Paint.Cap.ROUND);
dottedPaint = new Paint();
dottedPaint.setAntiAlias(true);
dottedPaint.setStyle(Paint.Style.STROKE);
dottedPaint.setStrokeWidth(brokenLineWith);
dottedPaint.setColor((straightLineColor));
dottedPaint.setStrokeCap(Paint.Cap.ROUND);
textPaint = new Paint();
textPaint.setAntiAlias(true);
textPaint.setTextAlign(Paint.Align.CENTER);
textPaint.setStyle(Paint.Style.FILL);
textPaint.setColor((textNormalColor));
textPaint.setTextSize(dipToPx(15));
}

繪制代表最高分和最低分虛線

//繪制虛線
private void drawDottedLine(Canvas canvas, float startX, float startY, float stopX, float stopY)
{
dottedPaint.setPathEffect(new DashPathEffect(new float[]{20, 10}, 4));
dottedPaint.setStrokeWidth(1);
// 實例化路徑
Path mPath = new Path();
mPath.reset();
// 定義路徑的起點
mPath.moveTo(startX, startY);
mPath.lineTo(stopX, stopY);
canvas.drawPath(mPath, dottedPaint);
}

繪制文本

//繪制文本
private void drawText(Canvas canvas)
{
textPaint.setTextSize(dipToPx(12));
textPaint.setColor(textNormalColor);
canvas.drawText(String.valueOf(maxScore), viewWith * 0.1f - dipToPx(10), viewHeight * 0.15f + textSize * 0.25f, textPaint);
canvas.drawText(String.valueOf(minScore), viewWith * 0.1f - dipToPx(10), viewHeight * 0.4f + textSize * 0.25f, textPaint);
textPaint.setColor(0xff7c7c7c);
float newWith = viewWith - (viewWith * 0.15f) * 2;//分隔線距離最左邊和最右邊的距離是0.15倍的viewWith
float coordinateX;//分隔線X坐標
textPaint.setTextSize(dipToPx(12));
textPaint.setStyle(Paint.Style.FILL);
textPaint.setColor(textNormalColor);
textSize = (int) textPaint.getTextSize();
for(int i = 0; i < monthText.length; i++)
{
coordinateX = newWith * ((float) (i) / (monthCount - 1)) + (viewWith * 0.15f);
if(i == selectMonth - 1)
{
textPaint.setStyle(Paint.Style.STROKE);
textPaint.setColor(brokenLineColor);
RectF r2 = new RectF();
r2.left = coordinateX - textSize - dipToPx(4);
r2.top = viewHeight * 0.7f + dipToPx(4) + textSize / 2;
r2.right = coordinateX + textSize + dipToPx(4);
r2.bottom = viewHeight * 0.7f + dipToPx(4) + textSize + dipToPx(8);
canvas.drawRoundRect(r2, 10, 10, textPaint);
}
//繪制月份
canvas.drawText(monthText[i], coordinateX, viewHeight * 0.7f + dipToPx(4) + textSize + dipToPx(5), textPaint);
textPaint.setColor(textNormalColor);
}
}

繪制代表月份的屬性

//繪制月份的直線(包括刻度)
private void drawMonthLine(Canvas canvas)
{
straightPaint.setStrokeWidth(dipToPx(1));
canvas.drawLine(0, viewHeight * 0.7f, viewWith, viewHeight * 0.7f, straightPaint);
float newWith = viewWith - (viewWith * 0.15f) * 2;//分隔線距離最左邊和最右邊的距離是0.15倍的viewWith
float coordinateX;//分隔線X坐標
for(int i = 0; i < monthCount; i++)
{
coordinateX = newWith * ((float) (i) / (monthCount - 1)) + (viewWith * 0.15f);
canvas.drawLine(coordinateX, viewHeight * 0.7f, coordinateX, viewHeight * 0.7f + dipToPx(4), straightPaint);
}
}

繪制芝麻分折線

//繪制折線
private void drawBrokenLine(Canvas canvas)
{
brokenPath.reset();
brokenPaint.setColor(brokenLineColor);
brokenPaint.setStyle(Paint.Style.STROKE);
if(score.length == 0)
{
return;
}
Log.v("ScoreTrend", "drawBrokenLine: " + scorePoints.get(0));
brokenPath.moveTo(scorePoints.get(0).x, scorePoints.get(0).y);
for(int i = 0; i < scorePoints.size(); i++)
{
brokenPath.lineTo(scorePoints.get(i).x, scorePoints.get(i).y);
}
canvas.drawPath(brokenPath, brokenPaint);
}

繪制代表芝麻分的圓點

//繪制折線穿過的點
private void drawPoint(Canvas canvas)
{
if(scorePoints == null)
{
return;
}
brokenPaint.setStrokeWidth(dipToPx(1));
for(int i = 0; i < scorePoints.size(); i++)
{
brokenPaint.setColor(brokenLineColor);
brokenPaint.setStyle(Paint.Style.STROKE);
canvas.drawCircle(scorePoints.get(i).x, scorePoints.get(i).y, dipToPx(3), brokenPaint);
brokenPaint.setColor(Color.WHITE);
brokenPaint.setStyle(Paint.Style.FILL);
if(i == selectMonth - 1)
{
brokenPaint.setColor(0xffd0f3f2);
canvas.drawCircle(scorePoints.get(i).x, scorePoints.get(i).y, dipToPx(8f), brokenPaint);
brokenPaint.setColor(0xff81dddb);
canvas.drawCircle(scorePoints.get(i).x, scorePoints.get(i).y, dipToPx(5f), brokenPaint);
//繪制浮動文本背景框
drawFloatTextBackground(canvas, scorePoints.get(i).x, scorePoints.get(i).y - dipToPx(8f));
textPaint.setColor(0xffffffff);
//繪制浮動文字
canvas.drawText(String.valueOf(score[i]), scorePoints.get(i).x, scorePoints.get(i).y - dipToPx(5f) - textSize, textPaint);
}
brokenPaint.setColor(0xffffffff);
canvas.drawCircle(scorePoints.get(i).x, scorePoints.get(i).y, dipToPx(1.5f), brokenPaint);
brokenPaint.setStyle(Paint.Style.STROKE);
brokenPaint.setColor(brokenLineColor);
canvas.drawCircle(scorePoints.get(i).x, scorePoints.get(i).y, dipToPx(2.5f), brokenPaint);
}
}

繪制選中分數的懸浮文字以及背景

//繪制顯示浮動文字的背景
private void drawFloatTextBackground(Canvas canvas, int x, int y)
{
brokenPath.reset();
brokenPaint.setColor(brokenLineColor);
brokenPaint.setStyle(Paint.Style.FILL);
//P1
Point point = new Point(x, y);
brokenPath.moveTo(point.x, point.y);
//P2
point.x = point.x + dipToPx(5);
point.y = point.y - dipToPx(5);
brokenPath.lineTo(point.x, point.y);
//P3
point.x = point.x + dipToPx(12);
brokenPath.lineTo(point.x, point.y);
//P4
point.y = point.y - dipToPx(17);
brokenPath.lineTo(point.x, point.y);
//P5
point.x = point.x - dipToPx(34);
brokenPath.lineTo(point.x, point.y);
//P6
point.y = point.y + dipToPx(17);
brokenPath.lineTo(point.x, point.y);
//P7
point.x = point.x + dipToPx(12);
brokenPath.lineTo(point.x, point.y);
//最後一個點連接到第一個點
brokenPath.lineTo(x, y);
canvas.drawPath(brokenPath, brokenPaint);
}

處理點擊事件

@Override
public boolean onTouchEvent(MotionEvent event)
{
this.getParent().requestDisallowInterceptTouchEvent(true);//一旦底層View收到touch的action後調用這個方法那麼父層View就不會再調用onInterceptTouchEvent了，也無法截獲以後的action
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
onActionUpEvent(event);
this.getParent().requestDisallowInterceptTouchEvent(false);
break;
case MotionEvent.ACTION_CANCEL:
this.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
return true;
}
private void onActionUpEvent(MotionEvent event)
{
boolean isValidTouch = validateTouch(event.getX(), event.getY());
if(isValidTouch)
{
invalidate();
}
}
//是否是有效的觸摸范圍
private boolean validateTouch(float x, float y)
{
//曲線觸摸區域
for(int i = 0; i < scorePoints.size(); i++)
{
// dipToPx(8)乘以2為了適當增大觸摸面積
if(x > (scorePoints.get(i).x - dipToPx(8) * 2) && x < (scorePoints.get(i).x + dipToPx(8) * 2))
{
if(y > (scorePoints.get(i).y - dipToPx(8) * 2) && y < (scorePoints.get(i).y + dipToPx(8) * 2))
{
selectMonth = i + 1;
return true;
}
}
}
//月份觸摸區域
//計算每個月份X坐標的中心點
float monthTouchY = viewHeight * 0.7f - dipToPx(3);//減去dipToPx(3)增大觸摸面積
float newWith = viewWith - (viewWith * 0.15f) * 2;//分隔線距離最左邊和最右邊的距離是0.15倍的viewWith
float validTouchX[] = new float[monthText.length];
for(int i = 0; i < monthText.length; i++)
{
validTouchX[i] = newWith * ((float) (i) / (monthCount - 1)) + (viewWith * 0.15f);
}
if(y > monthTouchY)
{
for(int i = 0; i < validTouchX.length; i++)
{
Log.v("ScoreTrend", "validateTouch: validTouchX:" + validTouchX[i]);
if(x < validTouchX[i] + dipToPx(8) && x > validTouchX[i] - dipToPx(8))
{
Log.v("ScoreTrend", "validateTouch: " + (i + 1));
selectMonth = i + 1;
return true;
}
}
}
return false;
}

獲取控件的寬高

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
viewWith = w;
viewHeight = h;
initData();
}

4.總結

還有一些比較不夠完善的地方需要處理，比如說可以通過XML調節的屬性太少了。平時寫的東西還是太少了，希望以後多總結完善寫作功底吧。需要的屬性後面需要再完善吧

GitHub地址：https://github.com/FelixLee0527/ZhiMaScoreCurve

以上所述是小編給大家介紹的Android 自定義View實現芝麻分曲線圖效果，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對本站網站的支持！