可设置 线性渐变-背景色-进度条颜色-圆弧宽度
效果图
普通效果.png
渐变效果
改变弧度效果
步骤一：新建自定义控件CirclePercentView继承View（代码可直接复制使用）
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.support.annotation.Keep;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
/**
* 圆形进度条（可设置 线性渐变-背景色-进度条颜色-圆弧宽度）
* Created by ZWQ
*/
public class CirclePercentView extends View {
public static final int WIDTH_RADIUS_RATIO = 8; // 弧线半径 : 弧线线宽 (比例)
public static final int MAX = 100;
private Paint mPaint;
private float progressPercent;
private int radius;//圆弧宽度
private RectF rectF;
private int bgColor, progressColor;
private int startColor, endColor;
private LinearGradient gradient;
private boolean isGradient;
public CirclePercentView(Context context) {
super(context);
init();
}
public CirclePercentView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.CirclePercentView);
bgColor = typedArray.getColor(R.styleable.CirclePercentView_circleBgColor, getResources().getColor(R.color.gray_cfcfcf));
progressColor = typedArray.getColor(R.styleable.CirclePercentView_circleProgressColor, getResources().getColor(R.color.orange_ffc032));
radius = typedArray.getInt(R.styleable.CirclePercentView_circleRadius, WIDTH_RADIUS_RATIO);
isGradient = typedArray.getBoolean(R.styleable.CirclePercentView_circleIsGradient, false);
startColor = typedArray.getColor(R.styleable.CirclePercentView_circleStartColor, getResources().getColor(R.color.black_3A3D4E));
endColor = typedArray.getColor(R.styleable.CirclePercentView_circleEndColor, getResources().getColor(R.color.black_475B80));
typedArray.recycle();
init();
}
public CirclePercentView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth());//自定义的View能够使用wrap_content或者是match_parent的属性
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
gradient = new LinearGradient(getWidth(), 0, getWidth(), getHeight(), startColor, endColor, Shader.TileMode.MIRROR);
}
@SuppressWarnings("Duplicates")
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// 1、绘制背景灰色圆环
int centerX = getWidth() / 2;
int strokeWidth = centerX / radius;
mPaint.setShader(null);//必须设置为null，否则背景也会加上渐变色
mPaint.setStrokeWidth(strokeWidth); //设置画笔的大小
mPaint.setColor(bgColor);
canvas.drawCircle(centerX, centerX, centerX - strokeWidth / 2, mPaint);
// 2、绘制比例弧
if (rectF == null) {//外切正方形
rectF = new RectF(strokeWidth / 2, strokeWidth / 2, 2 * centerX - strokeWidth / 2, 2 * centerX - strokeWidth / 2);
}
//3、是否绘制渐变色
if (isGradient) {
mPaint.setShader(gradient);//设置线性渐变
} else {
mPaint.setColor(progressColor);
}
canvas.drawArc(rectF, -90, 3.6f * progressPercent, false, mPaint); //画比例圆弧
}
private void init() {
mPaint = new Paint();
//画笔样式
mPaint.setStyle(Paint.Style.STROKE);
//设置笔刷的样式:圆形
mPaint.setStrokeCap(Paint.Cap.ROUND);
//设置抗锯齿
mPaint.setAntiAlias(true);
}
@Keep
public void setPercentage(float percentage) {
this.progressPercent = percentage;
invalidate();
}
public void setRadius(int radius) {
this.radius = radius;
}
public void setBgColor(int bgColor) {
this.bgColor = bgColor;
}
public void setProgressColor(int progressColor) {
this.progressColor = progressColor;
}
public void setStartColor(int startColor) {
this.startColor = startColor;
}
public void setEndColor(int endColor) {
this.endColor = endColor;
}
public void setGradient(boolean gradient) {
isGradient = gradient;
}
}
步骤二：自定义属性
在styles.xml添加自定义属性
<declare-styleable name="CirclePercentView">
<!--圆弧背景色-->
<attr name="circleBgColor" format="reference" />
<!--圆弧进度条颜色-->
<attr name="circleProgressColor" format="reference" />
<!--圆弧宽度-->
<attr name="circleRadius" format="integer" />
<!--渐变开始颜色-->
<attr name="circleStartColor" format="reference" />
<!--渐变结束颜色-->
<attr name="circleEndColor" format="reference" />
<!--是否渐变-->
<attr name="circleIsGradient" format="boolean" />
</declare-styleable>
步骤三：使用
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.yate.jsq.widget.progress.CirclePercentView
android:id="@id/circle_percent_progress"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center_horizontal"
app:circleBgColor="@color/gray_color2"
app:circleIsGradient="true"
app:circleProgressColor="@color/black_3A3D4E" />
</FrameLayout>
1）动画效果
public static final int ANIMATOR_DURATION = 1000;
private CirclePercentView progressView;
/**
* 设置百分比
* @param max 最大值
* @param current 占比
*/
private void setData(int max, float current) {
float percentage = (100f * current) / max;
ObjectAnimator animator = ObjectAnimator.ofFloat(progressView, "percentage", 0, percentage);
animator.setDuration(ANIMATOR_DURATION);
animator.start();
}
调用setData（）方法，传入最大值和占比值即可
2）无动画效果
private CirclePercentView progressView;
progressView.setPercentage(50);//传入百分比的值
