Custom wheel widget for android

Alessandro Crugnola

Last update: Nov 21, 2022

Related tags

UI/UX AndroidWheel

Overview

Wheel widget for Android

To include the wheel widget in the current layout, you should add in the layout xml this lines:

        <it.sephiroth.android.wheel.view.Wheel
            android:id="@+id/wheel"
            xmlns:sephiroth="http://schemas.android.com/apk/res-auto"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            sephiroth:numRotations="6"
            sephiroth:ticks="28" />

Where numRotations is the max number of rotations the wheel can perform and ticks is the total number of ticks the wheel will display.

In your activity you can add a OnScrollListener listener to the wheel widget, in this way:

	mWheel = (Wheel) findViewById( R.id.wheel );
	mWheel.setOnScrollListener( new OnScrollListener() {
		
		@Override
		public void onScrollStarted( Wheel view, float value, int roundValue ) {
		}
		
		@Override
		public void onScrollFinished( Wheel view, float value, int roundValue ) {
		}
		
		@Override
		public void onScroll( Wheel view, float value, int roundValue ) {
		}
	} );

Where float value is a value between -1.0 and 1.0 of the current indicator position and int roundValue is a value between -(ticksnumRotations) and (ticksnumRotations)

###Change the Wheel value The wheel position and value chan be changed programmatically at runtime using the Wheel's method setValue:

public void setValue( float value, boolean fireScrollEvent );

value is the new wheel value, a float between -1.0f and 1.0f, where 0.0f it's the center of the wheel.
fireScrollEvent: if true, once this method is called the onScrollFinished method will be called.

Screen Shots

Comments

Error importing android wheel to my project

Hey there! I just imported this project to Eclipse to use it as library, but when I added this library to my project, a lot of errors appeared suddenly in my project... Errors were like this: R cannot be resolved to a variable. So, which is the correct way to import android wheel?

opened by bamsbamx 7
Set wheel position from code

Thank you for making this very useful widget. I need to set its starting position to something other than halfway - e.g. the total range is 0 to 100, but I want it to start at 30 rather than 50.

How can this be done?

opened by bmb6agb 2
Adding support for Android 2.1 and 2.2

Your wheel looks great & funny. But, I must set API to >= 9 when build because in Wheel.java line 1084 you define a OverScroller (which only from API 9+). This mean I cannot run this app on Android 2.1 and 2.2.

Can you take time to add support for 2.1 and 2.2?

Thanks.

opened by anticafe 1
Use with minimal XML
Specifically, I'm trying to move the lines

sephiroth:numRotations="2" sephiroth:ticks="20"

to code, so that I can externalize the wheel and change it at will in my app. However, I can't find a way to control these via java rather than xml.
opened by jamrader 0

SetValue causes a "divide by 0" exception.

Using the setvalue method gives me a divide by zero exception.

My code is as follows:

            mWheel = (Wheel) v.findViewById(R.id.wheel);
            mWheel.setOnScrollListener( new Wheel.OnScrollListener() {

                @Override
                public void onScrollStarted( Wheel view, float value, int roundValue ) {
                    Log.i("SPINZ", "STARTED: f: " + value + " / i: " + roundValue);
                }

                @Override
                public void onScrollFinished( Wheel view, float value, int roundValue ) {
                    Log.i("SPINZ", "FINISHED: f: " + value + " / i: " + roundValue);
                    roundValue *= -1;
                    roundValue += 40;
                    if (roundValue >= 0 && roundValue < sections.length)
                        mSectionTV.setText(sections[roundValue]);
                }

                @Override
                public void onScroll( Wheel view, float value, int roundValue ) {

                    roundValue *= -1;
                    roundValue += 40;
                    if (roundValue >= 0 && roundValue < sections.length)
                        mSectionTV.setText(sections[roundValue]);
                }
            } );

            mWheel.setValue(1.0f, true);

If I take mWheel.setValue(1.0f, true) and move it to right after mWheel = (Wheel) v.findViewById(R.id.wheel), then I don't get the divide by zero exception, but the method doesn't do anything either.

opened by jamrader 0

Owner

Alessandro Crugnola

GitHub

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