How to Create a circular progressbar in Android which rotates on it?

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last updated4 years ago
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I am trying to create a rounded progressbar. This is what I want to achieve

There is a grey color background ring. On top of it, a blue color progressbar appears which moves in a circular path from 0 to 360 in 60 or whatever amount of seconds.

enter image description here

Here is my example code.

<ProgressBar
            android:id="@+id/ProgressBar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            style="?android:attr/progressBarStyleLarge"
            android:indeterminateDrawable="@drawable/progressBarBG"
            android:progress="50"
            />

To do this, in the drawable "progressBarBG", I am creating a layerlist and inside that layer list I am giving two items as shown.

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background">
    <shape
            android:shape="ring"
            android:innerRadius="64dp"
            android:thickness="8dp"
            android:useLevel="false">

        <solid android:color="@color/grey" />
    </shape>
</item>

<item android:id="@android:id/progress">
    <clip>
        <shape
                android:shape="ring"
                android:innerRadius="64dp"
                android:thickness="8dp"
                android:useLevel="false">

            <solid android:color="@color/blue" />
        </shape>
    </clip>
</item>

Now, the first grey ring is generated fine. The blue ring however starts from the left of the drawable and goes to the right just like how a linear progressbar works. This is how it shows at 50% progress with the red color arrow showing direction.

enter image description here

I want to move the blue progressbar in circular path as expected.

11 Answers

Up Vote9Down Vote
Grade: A

How to Create a Circular ProgressBar in Android That Rotates on It

Problem:

You're trying to create a circular progress bar in Android that rotates on it. However, your current code is generating a linear progress bar instead of a circular one.

Solution:

To fix this issue, you need to modify your drawable "progressBarBG" to create a circular progress bar. Here's the updated code:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape
            android:shape="ring"
            android:innerRadius="64dp"
            android:thickness="8dp"
            android:useLevel="false">

            <solid android:color="@color/grey" />
        </shape>
    </item>

    <item android:id="@android:id/progress">
        <rotate android:pivotX="50%" android:pivotY="50%">
            <shape
                android:shape="ring"
                android:innerRadius="64dp"
                android:thickness="8dp"
                android:useLevel="false">

                <solid android:color="@color/blue" />
            </shape>
        </rotate>
    </item>
</layer-list>

Explanation:

  • The rotate element rotates the progress bar shape by 180 degrees around the center of the circle.
  • The pivotX and pivotY attributes specify the point around which the progress bar will rotate. In this case, the pivot point is at the center of the circle.
  • The progress bar shape is a ring with a specific inner radius and thickness.

Additional Notes:

  • You can adjust the innerRadius and thickness values according to your desired design.
  • The useLevel attribute is set to false because we don't want to use the progress bar's intrinsic progress value.
  • The android:indeterminateDrawable attribute is not necessary if you're not using an indeterminate progress bar.
  • You may need to create a custom drawable for the background ring and progress bar if you want to customize the colors and styles further.

Result:

After implementing these changes, your circular progress bar should rotate on its axis correctly.

Here's an example of the final result:

enter image description here

Up Vote9Down Vote
Grade: A

It seems like you're trying to create a circular progress bar with a rotating progress. To achieve this, you need to create a custom progress drawable and a custom progress animation. I'll guide you through the steps.

  1. Create a custom progress drawable:

Create a new XML file named progress_bar_background.xml in your res/drawable folder:

<solid android:color="@color/grey" />

Create another XML file named progress_bar_progress.xml in your res/drawable folder:

<rotate xmlns:android="http://schemas.android.com/apk/res/android"
        android:fromDegrees="270"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="270" >

    <shape
        android:innerRadiusRatio="3"
        android:shape="ring"
        android:thicknessRatio="8"
        android:useLevel="false"
        android:visible="true">

        <size
            android:height="48dp"
            android:width="48dp" />
        <gradient
            android:centerColor="@color/blue"
            android:endColor="@color/blue"
            android:startColor="@color/blue"
            android:type="sweep"
            android:useLevel="false" />
    </shape>
</rotate>
  1. Create a custom progress animation:

Create a new XML file named progress_bar_animation.xml in your res/anim folder:

<objectAnimator
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="60000"
    android:interpolator="@android:interpolator/linear"
    android:propertyName="progress"
    android:valueFrom="0"
    android:valueTo="360"
    android:valueType="intType" />
  1. Apply the custom progress drawable and animation to your ProgressBar:

Update your ProgressBar in the layout XML file:

<ProgressBar
    android:id="@+id/progressBar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:indeterminate="false"
    android:progress="0"
    android:progressBackgroundColor="@drawable/progress_bar_background"
    android:rotation="270"
    android:progressDrawable="@drawable/progress_bar_progress"
    android:layout_centerInParent="true" />
  1. Start the progress animation in your activity:

In your activity, you need to start the progress animation:

public class YourActivity extends AppCompatActivity {

    private ProgressBar progressBar;
    private ObjectAnimator animation;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_your_activity);

        progressBar = findViewById(R.id.progressBar);

        animation = ObjectAnimator.ofInt(progressBar, "progress", 0, 360);
        animation.setDuration(60000);
        animation.setInterpolator(new LinearInterpolator());
        animation.start();
    }
}

Now you should have a circular progress bar with a rotating progress as you intended. You can adjust the color, size, and duration as needed.

Up Vote8Down Vote
Grade: B

To create a circular progress bar in Android that rotates on its center, you can use a combination of a View and a ValueAnimator. Here's an example implementation:

CustomCircularProgressBar.java:

public class CustomCircularProgressBar extends View {

    private Paint mPaint;
    private float mProgress = 0;
    private float mStrokeWidth = 10;
    private int mColor = Color.BLUE;

    public CustomCircularProgressBar(Context context) {
        super(context);
        init();
    }

    public CustomCircularProgressBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

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

    private void init() {
        mPaint = new Paint();
        mPaint.setColor(mColor);
        mPaint.setStrokeWidth(mStrokeWidth);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setAntiAlias(true);
    }

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

        // Draw the background circle
        canvas.drawCircle(getWidth() / 2, getHeight() / 2, (getWidth() - mStrokeWidth) / 2, mPaint);

        // Draw the progress arc
        RectF rectF = new RectF(mStrokeWidth / 2, mStrokeWidth / 2, getWidth() - mStrokeWidth / 2, getHeight() - mStrokeWidth / 2);
        canvas.drawArc(rectF, -90, mProgress * 360 / 100, false, mPaint);
    }

    public void setProgress(float progress) {
        mProgress = progress;
        invalidate();
    }

    public void setColor(int color) {
        mColor = color;
        mPaint.setColor(mColor);
        invalidate();
    }

    public void setStrokeWidth(float strokeWidth) {
        mStrokeWidth = strokeWidth;
        mPaint.setStrokeWidth(mStrokeWidth);
        invalidate();
    }
}

MainActivity.java:

public class MainActivity extends AppCompatActivity {

    private CustomCircularProgressBar mProgressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mProgressBar = findViewById(R.id.progress_bar);

        ValueAnimator animator = ValueAnimator.ofFloat(0, 100);
        animator.setDuration(60000);
        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                float progress = (float) animation.getAnimatedValue();
                mProgressBar.setProgress(progress);
            }
        });
        animator.start();
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.example.customcircularprogressbar.CustomCircularProgressBar
        android:id="@+id/progress_bar"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_centerInParent="true" />

</RelativeLayout>

This code will create a circular progress bar that rotates on its center and animates from 0% to 100% progress over 60 seconds. You can customize the appearance of the progress bar by setting the color, strokeWidth, and progress properties of the CustomCircularProgressBar view.

Up Vote8Down Vote
Grade: B

To move the blue progressbar in a circular path as expected, you need to modify the Shape attributes of the item elements in your layer-list. Here's how:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape
            android:shape="ring"
            android:innerRadius="64dp"
            android:thickness="8dp"
            android:useLevel="false">

            <solid android:color="@color/grey" />

            <property name="rotation" type="float">
                <set-int-attribute name="rotation" value="0"/>
            </property>

        </shape>
    </item>

    <item android:id="@android:id/progress">
        <clip>
            <shape
                android:shape="ring"
                android:innerRadius="64dp"
                android:thickness="8dp"
                android:useLevel="false">

                <solid android:color="@color/blue" />

                <property name="rotation" type="float">
                    <set-int-attribute name="rotation" value="360"/>
                </property>

            </shape>
        </clip>
    </item>
</layer-list>

Explanation:

  • We set the rotation property of each item to 0 and 360 degrees, respectively. This ensures that the progress bar starts from the left of the drawable and rotates clockwise.
  • The clip element for the progress item defines a circular shape with a radius of 64dp, which is half the width of the drawable.
  • This ensures that the progress bar is centered and rotates correctly.

Note:

  • You can adjust the android:innerRadius and android:thickness values to control the size and width of the progress bar.
  • You can also adjust the color and other attributes of the progress bar as needed.
Up Vote8Down Vote
Grade: B

To create a circular progress bar in Android that rotates, you need to use a custom implementation using a Canvas and an Animator. Here's a step-by-step guide based on your code:

  1. Create a new class CircularProgressBar that extends View.
import android.content.Context
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.Paint
import android.graphics.RectF
import android.util.AttributeSet
import android.view.View
import android.animation.Animator
import android.animation.ValueAnimator

class CircularProgressBar(context: Context, attributeSet: AttributeSet?) : View(context, attributeSet) {
    private lateinit var paint: Paint
    private val centerPoint = RectF(width / 2f, height / 2f, width / 2f + 50, height / 2f + 50)

    // Set your desired colors and progress percentage here.
    var progressColor = Color.parseColor("#4CAF50")
    private val backgroundColor = Color.parseColor("#F5F5F5")

    private var progressAngle: Float = 0f
    private lateinit var animator: ValueAnimator
    private var isRunning = false

    init {
        // Your custom constructor logic here.
    }

    fun startProgressAnimation(duration: Long, repeatCount: Int) {
        isRunning = true
        animator = ValueAnimator.ofFloat(0f, 360f).setDuration(duration)
            .addUpdateListener { animation ->
                progressAngle = animation.animatedValue as Float
                invalidate()
            }
        animator.repeatCount = repeatCount
        animator.start()
    }

    override fun onDraw(canvas: Canvas?) {
        super.onDraw(canvas)
        paint = Paint().apply {
            style = Paint.Style.FILL_AND_STROKE
            isAntiAlias = true
            color = backgroundColor
        }

        with(paint) {
            canvas?.drawCircle(centerPoint.centerX(), centerPoint.centerY(), radius / 2f, this)
            canvas?.save()
            canvas?.translate(centerPoint.centerX(), centerPoint.centerY())
            canvas?.rotate(progressAngle)
            paint.color = progressColor
            canvas.drawArc(centerPoint, 0f, progressAngle, false, Canvas.DrawArcs.OVERFLOW)
            canvas?.restore()
        }
    }
}
  1. In your layout XML, replace the ProgressBar with CircularProgressBar.
<com.yourpackage.name.CircularProgressBar
        android:id="@+id/progressBar"
        android:layout_width="100dp"
        android:layout_height="100dp"
        />
  1. Initialize and start the circular progress animation in your activity or fragment code.
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val circularProgressBar = findViewById<CircularProgressBar>(R.id.progressBar)
        circularProgressBar.startProgressAnimation(3000, -1) // duration and repeat count can be changed as desired.
    }
}

The custom CircularProgressBar class above handles creating a circular progress bar with both grey background and rotating blue progress bar using Canvas and an Animator. Note that this is just a starting point, and you might need to adjust the code according to your project requirements.

Up Vote8Down Vote
Grade: B

Here are my two solutions.

Instead of creating a layer-list, I separated it into two files. One for ProgressBar and one for its background.

This is the ProgressDrawable file (@drawable folder):

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="270"
    android:toDegrees="270">
    <shape
        android:innerRadiusRatio="2.5"
        android:shape="ring"
        android:thickness="1dp"
        android:useLevel="true"><!-- this line fixes the issue for lollipop api 21 -->

        <gradient
            android:angle="0"
            android:endColor="#007DD6"
            android:startColor="#007DD6"
            android:type="sweep"
            android:useLevel="false" />
    </shape>
</rotate>

And this is for its background(@drawable folder):

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="ring"
    android:innerRadiusRatio="2.5"
    android:thickness="1dp"
    android:useLevel="false">

    <solid android:color="#CCC" />

</shape>

And at the end, inside the layout that you're working:

<ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:indeterminate="false"
        android:progressDrawable="@drawable/circular_progress_bar"
        android:background="@drawable/circle_shape"
        style="?android:attr/progressBarStyleHorizontal"
        android:max="100"
        android:progress="65" />

Here's the result:

result 1

Use a custom view which inherits the android.view.View

result 2

Here is the full project on github

Up Vote7Down Vote
Grade: B

To create a circular progress bar in Android, you need to customize your drawables and animate them using ObjectAnimator for smooth rotation of blue line along the circumference of the ring.

You can achieve this by following these steps:

  1. Define your progressBarBG as an layer-list in a new file under res/drawable/ directory named 'my_circular_progressbar.xml'. Replace @color/grey and @color/blue with the actual color codes you want to use for grey background and blue progress respectively:
<layer-list xmlns:android="http://schemas.android.com/apkchemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape android:shape="ring"
            android:innerRadius="64dp"
            android:thickness="8dp"
            android:useLevel="false">
            <solid android:color="#grey" /><!-- Replace with your actual grey color -->
        </shape>
    </item>
    
    <item android:id="@android:id/progress">
        <clip>
            <shape android:shape="ring"
                android:innerRadius="64dp"
                android:thickness="8dp"
                android:useLevel="true">
                <solid android:color="#blue" /><!-- Replace with your actual blue color -->
            </shape>
        </clip>
    </item>
</layer-list>
  1. Set this layer-list as the indeterminateDrawable for a ProgressBar in your activity or fragment layout:
<ProgressBar
    android:id="@+id/my_progress"
    style="?android:attr/progressBarStyleHorizontal" 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"  
    android:indeterminateDrawable="@drawable/my_circular_progressbar"/>
  1. Animate the progress of ProgressBar from 0 to max in a new class that extends CountDownTimer:
new MyCountDownTimer(timeInMillis, delayTime).start();  

public class MyCountDownTimer extends CountDownTimer {  
    private int oldProgress=0;
    
    public MyCountDownTimer(long millisInFuture, long countDownInterval)  {  
        super(millisInFuture, countDownInterval);
    }
    
    @Override  
    public void onTick(long millisUntilFinished){  
       int progress=(int)((totalTime-millisUntilFinished)/(float)totalTime * 100);//totalTime is total time of countdowntimer.
       if (progress != oldProgress) { //to avoid unnecessary undo animations and to reduce performance cost
           mProgressBar.setProgress(progress,true);  
       }
       oldProgress = progress;
    } 
    
    @Override  
    public void onFinish() {  
        mProgressBar.setVisibility(View.INVISIBLE);//if you want to hide the ProgressBar instead of stopping it
    } 
}
  1. Finally, use a handler for starting and updating your animation:
private Handler h = new Handler();
Runnable updateProgress = new Runnable() {
    public void run(){  
        int progress=mProgressBar.getProgress();  
        if (progress < 100) { //assume max is 100  
            mProgressBar.incrementProgressBy(2);//add desired incrementation here  
             h.postDelayed(this, delayTime ); //update progress after a certain interval.
        }  
    }};
h.post(updateProgress); 

Ensure you initialize and set these variables where necessary (e.g., totalTime for CountDownTimer) before starting your timer to avoid null pointers/uninitialized variables, or handle them in an appropriate manner such as setting defaults, checking against min & max values etc.

You should have a circular progress bar that rotates from 0-360 degrees with blue line rotating along the circumference of grey circle. Please adjust colors and dimensions as needed to suit your requirements. Be sure to replace @color/grey, @color/blue and timeInMillis with appropriate values.

Up Vote6Down Vote
Grade: B

To create a circular progress bar in Android that rotates on it, you can use a ProgressBar with an indeterminate animation. You can set the rotation of the ProgressBar to 0 degrees by using the rotation attribute in your drawable XML file. Here is an example code snippet:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape android:shape="ring" android:innerRadius="64dp" android:thickness="8dp" android:useLevel="false">
            <solid android:color="@color/grey" />
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip>
            <shape android:shape="ring" android:innerRadius="64dp" android:thickness="8dp" android:useLevel="false">
                <solid android:color="@color/blue" />
            </shape>
        </clip>
    </item>
</layer-list>

You can also use the rotation attribute to set the rotation of the ProgressBar. Here is an example code snippet:

<ProgressBar
        android:id="@+id/progress_bar"
        style="@style/Widget.AppCompat.ProgressBar"
        android:indeterminate="true"
        android:rotation="0" />

By default, the rotation attribute is set to 180 degrees, which means that the ProgressBar will rotate in a clockwise direction. If you want to change the rotation of the ProgressBar, you can set the rotation attribute to the desired value in your drawable XML file or in the layout where you are using the ProgressBar.

You can also use AnimationDrawable instead of ProgressBar to create a circular progress bar that rotates on it. Here is an example code snippet:

<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/my_drawables">
    <target android:name="circle" />
    <animation-list>
        <rotate fromDegrees="0" toDegrees="360" duration="5000" />
    </animation-list>
</animated-vector>

You can also use the rotation attribute in your drawable XML file to set the rotation of the progress bar. Here is an example code snippet:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape android:shape="ring" android:innerRadius="64dp" android:thickness="8dp" android:useLevel="false">
            <solid android:color="@color/grey" />
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip>
            <shape android:shape="ring" android:innerRadius="64dp" android:thickness="8dp" android:useLevel="false">
                <solid android:color="@color/blue" />
            </shape>
        </clip>
    </item>
</layer-list>

In the above code, you can use rotation attribute to set the rotation of the progress bar. Here is an example code snippet:

<ProgressBar
        android:id="@+id/progress_bar"
        style="@style/Widget.AppCompat.ProgressBar"
        android:indeterminate="true"
        android:rotation="0" />

You can also use AnimationDrawable instead of ProgressBar to create a circular progress bar that rotates on it. Here is an example code snippet:

<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/my_drawables">
    <target android:name="circle" />
    <animation-list>
        <rotate fromDegrees="0" toDegrees="360" duration="5000" />
    </animation-list>
</animated-vector>
Up Vote6Down Vote
Grade: B

So in your question, you want to change this behavior so it doesn't go from left to right. But I guess you already have an idea of how you want the blue progressbar to move? For example if you don't mind the blue progressing clockwise you could try moving a shape along a path of a circle and create a circular path like below: enter image description here

Up Vote3Down Vote
Grade: C
import android.animation.ObjectAnimator;
import android.graphics.drawable.ClipDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.os.Bundle;
import android.widget.ProgressBar;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private ProgressBar progressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        progressBar = findViewById(R.id.ProgressBar);

        // Get the drawable from the ProgressBar
        Drawable progressDrawable = progressBar.getProgressDrawable();

        // Check if it's a LayerDrawable (which it should be)
        if (progressDrawable instanceof LayerDrawable) {
            LayerDrawable layerDrawable = (LayerDrawable) progressDrawable;

            // Get the progress drawable (the blue ring)
            Drawable progressRing = layerDrawable.findDrawableByLayerId(android.R.id.progress);

            // If it's a ClipDrawable (which it should be)
            if (progressRing instanceof ClipDrawable) {
                // Create an ObjectAnimator to rotate the progress drawable
                ObjectAnimator animator = ObjectAnimator.ofInt(progressRing, "level", 0, 10000);
                animator.setDuration(60000); // 60 seconds
                animator.start();
            }
        }
    }
}
Up Vote3Down Vote
Grade: C

To rotate the blue progress bar in a circular path, you can use the Matrix class in Android to perform transformations. First, you need to create a new matrix with an identity transform. This matrix will be used to apply the rotation transformation to the progressbar.

Matrix matrix = Matrix Identity Matrix;

Next, you need to create a transformation matrix that will be used to perform the rotation transformation.

Matrix rotationTransformMatrix = Matrix.createRotate(45f), 100);

Finally, you need to apply the rotation transformation to the progressbar matrix using the Matrix method called postRotate.

progressBar.postRotate(rotationTransformMatrix));

By following these steps, you should be able to rotate the blue progress bar in a circular path as expected.