MPAndroidChart：在BarChart中将X轴的标签旋转90度-Java 学习之路

来自MPAndroidChart的BarChart的xAxes中的文字太长了 . 如何将xAxes的标签旋转90度？

4 回答

21
现在可以在库版本2.1.6中使用

试试这个
```
XAxis xAxis=barChart.getXAxis();
xAxis.setLabelRotationAngle(-45);
```
回复于 2024-04-26T14:47:06+08:00

您可以隐藏xAxis标签并将自定义文本视图设置为垂直 . 这是垂直文本视图的代码 .

public class VerticalTextView extends TextView {
final boolean topDown;

public VerticalTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
    final int gravity = getGravity();
    if (Gravity.isVertical(gravity) && (gravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
        setGravity((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) | Gravity.TOP);
        topDown = false;
    } else
        topDown = true;
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(heightMeasureSpec, widthMeasureSpec);
    setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}

@Override
protected void onDraw(Canvas canvas) {
    TextPaint textPaint = getPaint();
    textPaint.setColor(getCurrentTextColor());
    textPaint.drawableState = getDrawableState();

    canvas.save();

    if (topDown) {
        canvas.translate(getWidth(), 0);
        canvas.rotate(90);
    } else {
        canvas.translate(0, getHeight());
        canvas.rotate(-90);
    }

    canvas.translate(getCompoundPaddingLeft(), getExtendedPaddingTop());

    getLayout().draw(canvas);
    canvas.restore();
}

}

回复于 2024-04-26T14:47:06+08:00

这很简单，试试这个......

XAxis xAxis = barChart.getXAxis();
xAxis.setLabelRotationAngle(90);

回复于 2024-04-26T14:47:06+08:00

只需覆盖 XAxisRenderer 和 renderAxisLabels(c: Canvas) 方法 .

并将其设置为barChart itemView.barChart.setXAxisRenderer(CustomBarChartRenderer(itemView.barChart.viewPortHandler, itemView.barChart.xAxis, itemView.barChart.rendererXAxis.transformer))

import android.graphics.Canvas
import com.github.mikephil.charting.renderer.XAxisRenderer
import com.github.mikephil.charting.utils.ViewPortHandler
import com.github.mikephil.charting.components.XAxis
import com.github.mikephil.charting.utils.MPPointF
import com.github.mikephil.charting.utils.Transformer

class CustomBarChartRenderer(viewPortHandler: ViewPortHandler, xAxis: XAxis, trans: Transformer) : XAxisRenderer(viewPortHandler, xAxis, trans) {

    override fun renderAxisLabels(c: Canvas) {

        if (!mXAxis.isEnabled || !mXAxis.isDrawLabelsEnabled)
            return

        val yoffset = mXAxis.yOffset

        mAxisLabelPaint.typeface = mXAxis.typeface
        mAxisLabelPaint.textSize = mXAxis.textSize
        mAxisLabelPaint.color = mXAxis.textColor

        val pointF = MPPointF.getInstance(0f, 0f)
        if (mXAxis.position == XAxis.XAxisPosition.TOP) {
            pointF.x = 0.5f
            pointF.y = 1.0f
            drawLabels(c, mViewPortHandler.contentTop() - yoffset, pointF)

        } else if (mXAxis.position == XAxis.XAxisPosition.TOP_INSIDE) {
            pointF.x = 0.5f
            pointF.y = 1.0f
            drawLabels(c, mViewPortHandler.contentBottom() - yoffset, pointF)

        } else if (mXAxis.position == XAxis.XAxisPosition.BOTTOM) {
            pointF.x = 0.5f
            pointF.y = 0.0f
            drawLabels(c, mViewPortHandler.contentBottom() + yoffset, pointF)

        } else if (mXAxis.position == XAxis.XAxisPosition.BOTTOM_INSIDE) {
            pointF.x = 0.5f
            pointF.y = 0.0f
            drawLabels(c, mViewPortHandler.contentBottom() - yoffset - mXAxis.mLabelRotatedHeight.toFloat(), pointF)

        } else { // BOTH SIDED
            pointF.x = 0.5f
            pointF.y = 1.0f
            drawLabels(c, mViewPortHandler.contentTop() - yoffset, pointF)
            pointF.x = 0.5f
            pointF.y = 0.0f
            drawLabels(c, mViewPortHandler.contentBottom() + yoffset, pointF)
        }
        MPPointF.recycleInstance(pointF)
    }
}

回复于 2024-04-26T14:47:06+08:00

MPAndroidChart：在BarChart中将X轴的标签旋转90度

4 回答

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