自定义圆形进度条

最新推荐文章于 2024-09-20 10:09:41 发布

原创最新推荐文章于 2024-09-20 10:09:41 发布 · 288 阅读

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自定义圆形进度条

public class jindutiao extends View {

    //定义一个画笔
    private Paint paint;
    private boolean runing = true ;
    private int progress = 0 ;
    public jindutiao(Context context) {
        super(context);
    }

    public jindutiao(Context context, AttributeSet attrs) {
        super(context, attrs);
        //创建画笔
        paint =  new Paint();
        paint.setAntiAlias(true);
        paint.setColor(Color.RED);
        //设置画笔 填充是空心
        paint.setStyle(Paint.Style.STROKE);

        new Thread(new Runnable() {
            @Override
            public void run() {
                while (runing){
                    if (progress >=360){
                        runing  = false;
                        return;
                    }
                    progress +=10;
                    postInvalidate();

                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();


    }

    public jindutiao(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

//        getWidth（） 获取当前View 的宽度
        int x =  getWidth() / 2 ;
        int y = getHeight() / 2 ;

        int radius =  200 ;


        //设置画笔的粗细
        paint.setStrokeWidth(30);
        //定义一个区域
        RectF rectF = new RectF(x-radius,y-radius,x+radius,y+radius);
        //画弧
//       useCentor  true 从中心点开始画 false 中心点不现实
        canvas.drawArc(rectF,-90,progress,false,paint);


        int text = (int) ((float)progress / 360  * 100 );

//        measureText  测量字符串的宽度
        float textWidth =  paint.measureText(text+"%");
        Rect rextText = new Rect();
//        rextText.height() 获取字符串的高度
        paint.getTextBounds(text+"%",0,(text+"%").length(),rextText);


        paint.setTextSize(30);
        paint.setStrokeWidth(1);
        //画文字
        canvas.drawText(text+"%",x-textWidth/2,y+rextText.height()/2,paint);

    }
}

导入自定义view
<com.example.my.demo_zidingyiview.view.jindutiao
    android:layout_width="match_parent"
    android:layout_height="match_parent" />