Android CircleProgressBar好看的圆形进度条

皇甫聪
2023-12-01

原文地址:http://blog.csdn.net/shiyani2012year/article/details/24649197

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

public class CircleProgressBar extends View {
    //进度总进程
    private int maxProgress = 60;
    private int progress = 0;
    //圆形框大小
    private int progressStrokeWidth = 36;
    // 画圆所在的距形区域
    RectF oval;
    Paint paint;

    public CircleProgressBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO 自动生成的构造函数存根
        oval = new RectF();
        paint = new Paint();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        // TODO 自动生成的方法存根
        super.onDraw(canvas);
        int width = this.getWidth();
        int height = this.getHeight();

        if (width != height) {
            int min = Math.min(width, height);
            width = min;
            height = min;
        }

        paint.setAntiAlias(true); // 设置画笔为抗锯齿
        paint.setColor(Color.WHITE); // 设置画笔颜色
        // canvas.drawColor(Color.TRANSPARENT); // 白色背景
        paint.setStrokeWidth(progressStrokeWidth); // 线宽
        paint.setStyle(Style.STROKE);

        oval.left = progressStrokeWidth / 2; // 左上角x
        oval.top = progressStrokeWidth / 2; // 左上角y
        oval.right = width - progressStrokeWidth / 2; // 左下角x
        oval.bottom = height - progressStrokeWidth / 2; // 右下角y

        // canvas.drawArc(oval, -90, 360, false, paint); // 绘制白色圆圈,即进度条背景
        // paint.setColor(Color.rgb(0x57, 0x87, 0xb6));
        paint.setColor(getContext().getResources().getColor(R.color.btn_bg));
        canvas.drawArc(oval, -90, ((float) progress / maxProgress) * 360,
                false, paint); // 绘制进度圆弧,这里是蓝色

        paint.setStrokeWidth(1);
        String text = progress + "%";
        int textHeight = height / 4;
        paint.setTextSize(textHeight);
        int textWidth = (int) paint.measureText(text, 0, text.length());
        paint.setStyle(Style.FILL);
        canvas.drawText(text, width / 2 - textWidth / 2, height / 2
                + textHeight / 2, paint);

    }

    public int getMaxProgress() {
        return maxProgress;
    }

    public void setMaxProgress(int maxProgress) {
        this.maxProgress = maxProgress;
    }

    public void setProgress(int progress) {
        this.progress = progress;
        this.invalidate();
    }

    /**
     * 非UI线程调用,设置进程大小
     */
    public void setProgressNotInUiThread(int progress) {
        this.progress = progress;
        this.postInvalidate();
    }
}
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