PieProgressDrawable.java

package com.example.android.view;


import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.DisplayMetrics;

/**
 * A PieProgressDrawable does this:
 * <a href="http://stackoverflow.com/questions/12458476/how-to-create-circular-progress-barpie-chart-like-indicator-android">Circular Progress Bar Android</a>
 */
public class PieProgressDrawable extends Drawable {

    Paint mPaint;
    RectF mBoundsF;
    RectF mInnerBoundsF;
    final float START_ANGLE = 0.f;
    float mDrawTo;

    public PieProgressDrawable() {
        super();
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    }

    /**
     * Set the border width.
     * @param widthDp in dip for the pie border
     */
    public void setBorderWidth(float widthDp, DisplayMetrics dm) {
        float borderWidth = widthDp * dm.density;
        mPaint.setStrokeWidth(borderWidth);
    }

    /**
     * @param color you want the pie to be drawn in
     */
    public void setColor(int color) {
        mPaint.setColor(color);
    }

    @Override
    public void draw(Canvas canvas) {
        // Rotate the canvas around the center of the pie by 90 degrees
        // counter clockwise so the pie stars at 12 o'clock.
        canvas.rotate(-90f, getBounds().centerX(), getBounds().centerY());
        mPaint.setStyle(Paint.Style.STROKE);
        canvas.drawOval(mBoundsF, mPaint);
        mPaint.setStyle(Paint.Style.FILL);
        canvas.drawArc(mInnerBoundsF, START_ANGLE, mDrawTo, true, mPaint);
        
        // Draw inner oval and text on top of the pie (or add any other
        // decorations such as a stroke) here..
        // Don't forget to rotate the canvas back if you plan to add text!
        // ...
    }

    @Override
    protected void onBoundsChange(Rect bounds) {
        super.onBoundsChange(bounds);
        mBoundsF = mInnerBoundsF = new RectF(bounds);
        final int halfBorder = (int) (mPaint.getStrokeWidth()/2f + 0.5f);
        mInnerBoundsF.inset(halfBorder, halfBorder);
    }

    @Override
    protected boolean onLevelChange(int level) {
        final float drawTo = START_ANGLE + ((float)360*level)/100f;
        boolean update = drawTo != mDrawTo;
        mDrawTo = drawTo;
        return update;
    }

    @Override
    public void setAlpha(int alpha) {
        mPaint.setAlpha(alpha);
    }

    @Override
    public void setColorFilter(ColorFilter cf) {
        mPaint.setColorFilter(cf);
    }

    @Override
    public int getOpacity() {
        return mPaint.getAlpha();
    }
}

How to use this drawable as a progress bar drawable.
I am trying like this
pieProgressDrawable = new PieProgressDrawable();
circleProgressBar.setProgressDrawable(pieProgressDrawable);

And also how to increase the progress.

my progress bar xml is

I've never tried using this in a ProgressView (funny that I'd never thought to try that). I've always used it in an ImageView. Does it work in an ImageView for you? If so, we know the problem is with the ProgressView. It may be that you need a certain scale type or something..

Maybe I just don't understand how custom drawables work, but how do I get the pie to update? The progress level sets correctly upon creation, but that's as far as I get.

EDIT: Ah, invalidate() makes it update. Nevermind! I'm just a newbie.

This is very useful and I thank you for it.

Please write an example. I can't draw a pie drawable like an image where you have shown in stackoverflow.

Hi, can you please write a example project for using this pie chart..?? That would be really helpfull..

Very useful class! Thank you. For those who need an example, I had to implement the Pie Progress to show a count down timer's progress. I wrote a small tutorial showing how to implement this class: https://irpdevelop.wordpress.com/2016/10/05/how-to-implement-pie-progress-view-in-android/