还是我们自定View的那几个步骤:
1、自定义View的属性
2、在View的构造方法中获得我们自定义的属性
[ 3、重写onMesure ]
4、重写onDraw
1、自定义属性:
2、在View的构造方法中获得我们自定义的属性
private int mProgress; private int mFirstColor; private int mSecondColor; private int mCircleWidth; private int mSpeed; private float textSize; private boolean isNext = false; private Paint mPaint; public CustomTitleView(Context context, AttributeSet attrs) { super(context, attrs); TypedArray typearray = context.obtainStyledAttributes(attrs, R.styleable.CustomTitleView); int count= typearray.getIndexCount(); for(int i=0;i3、直接重写onDraw,这不需要重写onMeasure
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){ super.onMeasure(widthMeasureSpec, heightMeasureSpec); } protected void onDraw(Canvas canvas) { mPaint.setStrokeWidth(0); mPaint.setColor(Color.BLACK); mPaint.setTextSize(textSize); mPaint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体 int percent = (int)(((float)mProgress / (float)360) * 100); int centre = getWidth() / 2; // 获取圆心的x坐标 int radius = centre - mCircleWidth / 2;// 半径 float textWidth = mPaint.measureText(percent + "%"); //测量字体宽度,我们需要根据字体的宽度设置在圆环中间 canvas.drawText(percent + "%",centre-textWidth/ 2,centre+textSize/2, mPaint); //画出进度百分比 mPaint.setStrokeWidth(mCircleWidth); // 设置圆环的宽度 mPaint.setAntiAlias(true); // 消除锯齿 mPaint.setStyle(Paint.Style.STROKE); // 设置空心 RectF oval = new RectF(centre - radius, centre - radius, centre + radius, centre + radius); // 用于定义的圆弧的形状和大小的界限 if(isNext){ mPaint.setColor(mSecondColor); // 设置圆环的颜色 canvas.drawCircle(centre, centre, radius, mPaint); // 画出圆环 mPaint.setColor(mFirstColor); // 设置圆环的颜色 canvas.drawArc(oval, -90, mProgress, false, mPaint); // 根据进度画圆弧 }else{ mPaint.setColor(mFirstColor); // 设置圆环的颜色 canvas.drawCircle(centre, centre, radius, mPaint); // 画出圆环 mPaint.setColor(mSecondColor); // 设置圆环的颜色 canvas.drawArc(oval, -90, mProgress, false, mPaint); // 根据进度画圆弧 } }activity_main.xml
效果预览
源码下载:http://xiazai.jb51.net/201701/yuanma/AndroidProgressbar(jb51.net).rar
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持考高分网。