简单进度条

来源：互联网发布：软件成本估算专家编辑：程序博客网时间：2024/05/17 10:54

package com.bwei.im.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;

import static android.R.attr.max;

/**
* Created by muhanxi on 17/10/31.
*/

public class CircleProgress extends View {
    public CircleProgress(Context context) {
        super(context);
    }

    Paint mPaint;
    public CircleProgress(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);

        mPaint = new Paint();

        new Thread(new Runnable() {
            @Override
            public void run() {

                while (true){

                    if(progress > 360){
                        return;
                    }
                    postInvalidate();
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    progress += 2 ;

                }

            }
        }).start();

    }

    public CircleProgress(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    int radioWidth = 30 ;
    int progress = 0 ;
    int max = 360;
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        int center = getWidth() / 2 ;

        int radius = center - radioWidth ;

        mPaint.setColor(Color.RED);
        mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
        mPaint.setAntiAlias(true);

        canvas.drawCircle(center,center,radius,mPaint);

        mPaint.setStrokeWidth(8);
        mPaint.setColor(Color.GREEN);
        mPaint.setStyle(Paint.Style.STROKE);
        RectF rectF = new RectF(center-radius,center-radius,center+radius,center+radius);

        System.out.println("progress = " + progress);
        canvas.drawArc(rectF,-90,progress,false,mPaint);

        mPaint.setColor(Color.BLACK);
        mPaint.setStyle(Paint.Style.FILL);
        int percent = progress; //中间的进度百分比，先转换成float在进行除法运算，不然都为0
        float textWidth = mPaint.measureText(percent+" %   ");
        mPaint.setTextSize(20);
        canvas.drawText((float)progress/(float) 360 * 100 +"%",center,center,mPaint);

    }

}

——————————————————————————————————————》》、

public class CustomProgrssView extends View {

    //定义一个画笔
    private Paint paint ;

    private boolean runing = true ;

    private int progress = 0 ;

    public CustomProgrssView(Context context) {
        super(context);
    }

    public CustomProgrssView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);

        //创建一个画笔
        paint = new Paint();
        // 抗锯齿
        paint.setAntiAlias(true);
        //设置画笔的颜色
        paint.setColor(Color.RED);
        //设置画笔填充是空心的
        paint.setStyle(Paint.Style.STROKE);

        new Thread(new Runnable() {
            @Override
            public void run() {

                while (runing){

                    if(progress >= 360){
                        runing = false;
                        return;
                    }
                    System.out.println("progress = " + progress);
                    progress += 10 ;

                    //子线程刷新系统调用onDraw（）方法
                    postInvalidate();

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

                }

            }
        }).start();

    }

    float sweep ;

    public CustomProgrssView(Context context, @Nullable 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);

    }
}

阅读全文

0 0