protected void onDraw(Canvas canvas) { canvas.save(); canvas.rotate(120, mWheelRect.centerX(), mWheelRect.centerY()); canvas.drawArc(mWheelRect, 0, 300, false, mDefaultWheelPaint); canvas.drawArc(mWheelRect, 0, 300, false, mCenterWheelPaint); canvas.drawText(mCurrStepNum + "", mWheelRect.centerX() - (mStepPaint.measureText(String.valueOf(mCurrStepNum)) / 2), mStepY, mStepPaint); canvas.drawText("今日步数", mWheelRect.centerX() - (mTitlePaint.measureText("今日步数") / 2), mTitleY, mTitlePaint); @SuppressLint("DrawAllocation") SweepGradient sweepGradient = new SweepGradient(mWheelRect.centerX(), mWheelRect.centerY(), new int[]{Color.GREEN, Color.BLUE, Color.YELLOW, Color.RED}, new float[]{0f * 300 / 360, 0.25f * 300 / 360, 0.75f * 300 / 360, 1f * 300 / 360}); mShowDataWheelPaint.setShader(sweepGradient); canvas.drawArc(mWheelRect, 0, mSweepAnglePer, false, mShowDataWheelPaint); canvas.restore(); // 恢复画布状态 }我这开头应该是Green颜色,但是开头有一点red颜色,怎么解决啊
时间: 2024-03-27 18:38:59 浏览: 125
安卓开发-Android截图,圆形,Canvas.zip
根据你提供的代码,可以看到在SweepGradient的定义中,第一个颜色是绿色,最后一个颜色是红色,因此你会看到开头有一点红色。如果你想要从绿色开始,可以将颜色数组中的顺序调整一下,例如将第一个颜色设为绿色,最后一个颜色设为红色,这样开头就会是绿色了。具体修改如下:
```
SweepGradient sweepGradient = new SweepGradient(mWheelRect.centerX(), mWheelRect.centerY(),
new int[]{Color.GREEN, Color.YELLOW, Color.BLUE, Color.RED},
new float[]{0f * 300 / 360, 0.25f * 300 / 360, 0.75f * 300 / 360, 1f * 300 / 360});
```
另外,如果你想要更加精细的控制渐变的颜色变化,可以调整颜色数组和对应的颜色位置数组,使得颜色的过渡更加平滑。
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