我正在制作 android 自定义 View ,它应该是加载动画(旋转弧),我的 View 允许开发人员设置背景颜色和顶部颜色。
问题是,当我在黑色圆弧上绘制浅色圆弧时,我只能看到顶部圆弧周围的一些黑色像素。 关闭抗锯齿功能时不会出现此问题,但这不是一个选项,因为那样会很丑。
我试过在位图上绘制它,但没有用。
我的临时解决方案是使顶部圆弧比底部圆弧宽 1px,但我有这样的时刻,我将颜色换成很酷的动画,然后如果你仔细观察就可以看到。
最佳答案
自定义 View
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
import com.example.basil.expensemanager.R;
public class MyProgress extends View {
private int mxSize, mySize;
private Paint mPaint;
private Paint incomeAmountCirlce;
private Paint expenseAmountCirlce;
private Paint innerCirclePaint;
private Paint txtviewCirclePaint;
private float finishedStrokeWidth;
private float unfinishedStrokeWidth;
private float sweepAngle;
private int textColor;
private int expenseColor;
private int incomeColor;
private int strokeWidth;
private int textSize;
private String textContent;
private RectF finishedOuterRect = new RectF();
private RectF unfinishedOuterRect = new RectF();
public MyProgress(Context context) {
super(context);
/* init();*/
}
public MyProgress(Context context, AttributeSet attrs) {
super(context, attrs);
/* init();*/
}
public MyProgress(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
/* init();*/
}
public int getTextColor() {
return textColor;
}
public void setTextColor(int textColor) {
this.textColor = textColor;
}
public float getFinishedStrokeWidth() {
return finishedStrokeWidth;
}
public void setFinishedStrokeWidth(float finishedStrokeWidth) {
this.finishedStrokeWidth = finishedStrokeWidth;
}
public float getUnfinishedStrokeWidth() {
return unfinishedStrokeWidth;
}
public void setUnfinishedStrokeWidth(float unfinishedStrokeWidth) {
this.unfinishedStrokeWidth = unfinishedStrokeWidth;
}
public String getTextContent() {
return textContent;
}
public void setTextContent(String textContent) {
this.textContent = textContent;
}
public int getTextSize() {
return textSize;
}
public void setTextSize(int textSize) {
this.textSize = textSize;
}
public float getSweepAngle() {
return sweepAngle;
}
public void setSweepAngle(float sweepAngle) {
this.sweepAngle = sweepAngle;
}
public int getIncomeColor() {
return incomeColor;
}
public void setIncomeColor(int incomeColor) {
this.incomeColor = incomeColor;
}
public Integer getExpenseColor() {
return expenseColor;
}
public void setExpenseColor(int expenseColor) {
this.expenseColor = expenseColor;
}
public int getStrokeWidth() {
return strokeWidth;
}
public void setStrokeWidth(int strokeWidth) {
this.strokeWidth = strokeWidth;
}
public void init() {
txtviewCirclePaint = new Paint();
txtviewCirclePaint.setColor(getResources().getColor(getTextColor()));
txtviewCirclePaint.setTextSize(getTextSize());
txtviewCirclePaint.setFakeBoldText(true);
txtviewCirclePaint.setAntiAlias(true);
incomeAmountCirlce = new Paint();
incomeAmountCirlce.setColor(getResources().getColor(getIncomeColor()));
incomeAmountCirlce.setStyle(Paint.Style.STROKE);
incomeAmountCirlce.setAntiAlias(true);
finishedStrokeWidth = getFinishedStrokeWidth();
incomeAmountCirlce.setStrokeWidth(finishedStrokeWidth);
expenseAmountCirlce = new Paint();
expenseAmountCirlce.setColor(getResources().getColor(getExpenseColor()));
expenseAmountCirlce.setStyle(Paint.Style.STROKE);
expenseAmountCirlce.setAntiAlias(true);
unfinishedStrokeWidth = getUnfinishedStrokeWidth();
expenseAmountCirlce.setStrokeWidth(unfinishedStrokeWidth);
innerCirclePaint = new Paint();
innerCirclePaint.setColor(getResources().getColor(R.color.cardview_light_background));
innerCirclePaint.setAntiAlias(true);
}
@Override
protected synchronized void onDraw(Canvas canvas) {
super.onDraw(canvas);
float delta = Math.max(finishedStrokeWidth, unfinishedStrokeWidth);
finishedOuterRect.set(delta, delta, getWidth() - delta, getHeight() - delta);
unfinishedOuterRect.set(delta, delta, getWidth() - delta, getHeight() - delta);
float innerCircleRadius = (getWidth() - Math.min(finishedStrokeWidth, unfinishedStrokeWidth) + Math.abs(finishedStrokeWidth - unfinishedStrokeWidth)) / 2f;
canvas.drawCircle(getWidth() / 2.0f, getHeight() / 2.0f, innerCircleRadius, innerCirclePaint);
canvas.drawArc(finishedOuterRect, 270, getSweepAngle(), false, incomeAmountCirlce);
canvas.drawArc(unfinishedOuterRect, 270 + getSweepAngle(), 360 - getSweepAngle(), false, expenseAmountCirlce);
float textHeight = txtviewCirclePaint.descent() + txtviewCirclePaint.ascent();
canvas.drawText(getTextContent(), (getWidth() - txtviewCirclePaint.measureText(getTextContent())) / 2.0f, (getWidth() - textHeight) / 2.0f, txtviewCirclePaint);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
this.setMeasuredDimension(parentWidth / 2, parentHeight / 2);
// bounds.set(0, 0, MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec));
new RectF().set(0, 0, parentWidth / 4, parentHeight / 4);
}
}
我已经在我的一个项目中完成了这个,用于显示进度条中的总收入和支出,希望这可以帮助你,如果你觉得有任何困难,请在下面评论
在你的 Activity 中使用它来初始化 View
public void init_decorate_progressbar() {
float val = calcalute_progressbar_data();
String totalPercent = "";
totalPercent = "" + (val / 3.6);
myProgressBar.invalidate();
myProgressBar.setExpenseColor(R.color.royalGreenDark);
myProgressBar.setIncomeColor(R.color.royalGreen);
myProgressBar.setFinishedStrokeWidth(30);
myProgressBar.setUnfinishedStrokeWidth(30);
myProgressBar.setTextColor(R.color.colorPrimaryDark);
myProgressBar.setTextSize(30);
if (totalPercent.equalsIgnoreCase("NaN")) {
myProgressBar.setSweepAngle(0);
myProgressBar.setTextContent("0%");
expenseMarkerLayout.setVisibility(View.GONE);
incomeMarkerLayout.setVisibility(View.GONE);
} else {
myProgressBar.setSweepAngle(val);
int incom = calculateIncomePercent();
myProgressBar.setTextContent("" + incom + "%");
txtIncomePercentMarker.setText("" + incom + "%");
int ex = calculateExpensePercent();
txtExpensePercentMarker.setText("" + ex + "%");
}
myProgressBar.init();
}
在您的 Activity XML 中
<com.example.basil.expensemanager.SupportClasses.MyProgress
android:id="@+id/myProgressBar"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_centerHorizontal="true"
android:layout_below="@id/main_header"
android:layout_marginBottom="@dimen/activity_horizontal_margin"
android:layout_marginTop="@dimen/activity_horizontal_margin"
android:max="100"
android:progress="0" />
关于android - 在暗弧顶部绘制亮弧使下弧部分可见,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53186816/