實現(xiàn)這個效果的進度條:

1586332466(1).png

• 話不多說上代碼,有問題聯(lián)系我

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

import androidx.annotation.Nullable;

public class TestView extends View {

    private int width;
    private int height;

    private Paint paint;
    private Path path;

    private Paint progressPaint;
    private Path progressPath;

    private int progress=0;

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

    public TestView(Context context) {
        this(context,null);
    }

    public TestView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs,0);
    }

    public TestView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        path = new Path();
        paint = new Paint();
        paint.setAntiAlias(true);
        paint.setStrokeWidth(5);
        paint.setColor(Color.parseColor("#FFFFFF"));
        paint.setStyle(Paint.Style.FILL);


        progressPath = new Path();
        progressPaint = new Paint();
        progressPaint.setAntiAlias(true);
        progressPaint.setStrokeWidth(5);
        progressPaint.setColor(Color.parseColor("#ED254D"));
        progressPaint.setStyle(Paint.Style.FILL);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        width =getMeasuredWidth();
        height = getMeasuredHeight();
    }

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

        float magin = 20;
        //繪制背景
        path.moveTo(1,magin);
        path.lineTo(1,height-magin);
        path.lineTo(width,height);
        path.lineTo(width,0);
        paint.setStrokeWidth(3);
        path.close();
        canvas.drawPath(path,paint);

        //繪制進度
        float progressWidth= (float) (width-width*(progress/100.0));
        float progressY = (float) (magin*(progress/100.0));

        progressPath.moveTo(progressWidth,progressY);
        progressPath.lineTo(progressWidth,height-progressY);
        progressPath.lineTo(width,height);
        progressPath.lineTo(width,0);
        progressPaint.setStrokeWidth(3);
        progressPath.close();
        canvas.drawPath(progressPath,progressPaint);
    }
}