attrs.xml
java
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!--图标颜色-->
<attr name="ijkSolid" format="color|reference" />
<!--圆角大小-->
<attr name="ijkRadius" format="dimension|reference" />
<!--线条长度-->
<attr name="ijkLineLength" format="dimension|reference" />
<!--线条和圆圈间距-->
<attr name="ijkGap" format="dimension|reference" />
<!--线条宽度-->
<attr name="ijkLineWidth" format="dimension|reference" />
<!--视频亮度-->
<declare-styleable name="VideoBrightness">
<!--图标颜色-->
<attr name="ijkSolid" />
<!--圆角大小-->
<attr name="ijkRadius" />
<!--线条长度-->
<attr name="ijkLineLength" />
<!--线条和圆圈间距-->
<attr name="ijkGap" />
<!--线条宽度-->
<attr name="ijkLineWidth" />
</declare-styleable>
</resources>
源码
java
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import androidx.annotation.Nullable;
import androidx.ijk.R;
/**
* 视频亮度图标
*/
public class VideoBrightness extends View {
private Paint paint;
/**
* 填充颜色
*/
private int solid = Color.CYAN;
private int solidClone = solid;
/**
* 中心x
*/
private float cx;
/**
* 中心y
*/
private float cy;
/**
* 半径
*/
private float radius = 0;
/**
* 线条长度
*/
private float lineLength = 0;
private float lineLengthClone;
/**
* 线条和中心圆间距
*/
private int gap = 20;
/**
* 线条宽度
*/
private float lineWidth = 5;
public VideoBrightness(Context context) {
this(context, null);
}
public VideoBrightness(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public VideoBrightness(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
if (attrs != null) {
TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.VideoBrightness);
solid = solidClone = array.getColor(R.styleable.VideoBrightness_ijkSolid, solid);
radius = array.getDimension(R.styleable.VideoBrightness_ijkRadius, radius);
lineLength = array.getDimension(R.styleable.VideoBrightness_ijkLineLength, lineLength);
gap = array.getDimensionPixelSize(R.styleable.VideoBrightness_ijkGap, gap);
lineWidth = array.getDimension(R.styleable.VideoBrightness_ijkLineWidth, lineWidth);
array.recycle();
}
paint = new Paint();
paint.setAntiAlias(true);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
cx = getMeasuredWidth() / 2;
cy = getMeasuredHeight() / 2;
int slide = Math.min(getMeasuredHeight(), getMeasuredWidth());
radius = radius == 0 ? slide / 6 : radius;
lineLength = lineLength == 0 ? (radius / 2 - gap) : lineLength;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
paint.setColor(solid);
paint.setStyle(Paint.Style.FILL);
canvas.drawCircle(cx, cy, radius, paint);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(lineWidth);
paint.setStrokeCap(Paint.Cap.ROUND);
float length = radius + gap;
for (int angle = 0; angle < 360; angle += 45) {
double radians = Math.toRadians(angle);
float startX = cx + (float) (length * Math.cos(radians));
float startY = cy + (float) (length * Math.sin(radians));
float endX = cx + (float) ((length + lineLength) * Math.cos(radians));
float endY = cy + (float) ((length + lineLength) * Math.sin(radians));
canvas.drawLine(startX, startY, endX, endY, paint);
}
}
/**
* 设置填充颜色
*
* @param solid
*/
public void setSolid(int solid) {
this.solid = solidClone = solid;
invalidate();
}
/**
* 设置亮度百分比值
*
* @param percent
*/
public void setValue(float percent) {
setRotation(percent * 360);//旋转
//线条长度
lineLengthClone = lineLengthClone == 0 ? lineLength : lineLengthClone;
lineLength = lineLengthClone * percent;
invalidate();
}
/**
* 设置半径大小
*
* @param radius
*/
public void setRadius(float radius) {
this.radius = radius;
invalidate();
}
/**
* 设置线段长度
*
* @param lineLength
*/
public void setLineLength(float lineLength) {
this.lineLength = lineLength;
invalidate();
}
/**
* 设置线段和圆圈间距
*
* @param gap
*/
public void setGap(int gap) {
this.gap = gap;
invalidate();
}
/**
* 设置线段宽度
*
* @param lineWidth
*/
public void setLineWidth(float lineWidth) {
this.lineWidth = lineWidth;
invalidate();
}
}