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README.md

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Pie Chart for Android

Description

A basic Pie Chart library that allows you to supply an adapter to the PieChartView and configure each pie slice. There is also support for an expandable pie chart, showing a sub pie chart. The Pie Chart will snap to whichever compass direction you would like. It is rotatable via touch or you can click on each slice to have it snap to the anchor position.

Usage

Here is a some sample code to create the initialize an adapter and set it to the chart:

	List<Float> slices = new ArrayList<Float>();
		
	slices.add(0.25f);
	slices.add(0.05f);
	slices.add(0.1f);
	slices.add(0.05f);
	slices.add(0.2f);
	slices.add(0.3f);
	slices.add(0.05f);
	
	PieChartAdapter adapter = new PieChartAdapter(this, slices);
	
	mChart = (PieChartView) findViewById(R.id.chart);
	mChart.setDynamics(new FrictionDynamics(0.95f));
	mChart.setSnapToAnchor(PieChartAnchor.BOTTOM);
	mChart.setAdapter(adapter);
	mChart.onResume();

In the adapter you will have to provide the percentage of each slice as well as apply color and offset:

	@Override
	public PieSliceDrawable getSlice(PieChartView parent, PieSliceDrawable convertDrawable, int position, float offset) {

		PieSliceDrawable sliceView = convertDrawable;
		
		if (sliceView == null) {
			sliceView = new PieSliceDrawable(parent, mContext);
		}
		
		// REQUIRED fields to set
		sliceView.setSliceColor(UiUtils.getRandomColor(mContext, position));
		sliceView.setPercent(mObjects.get(position));
		sliceView.setDegreeOffset(offset);
		
		return sliceView;
	}

An example of the xml layout file:

	<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"
		android:background="#FFF" >
			
		<com.saulpower.piechart.views.PieChartView
			android:id="@+id/chart"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"
			android:layout_centerInParent="true"
			android:layout_margin="10dp" />
			
	</RelativeLayout>

License

(The MIT License)

Copyright (c) 2013 Saul Howard

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the 'Software'), to deal in
the Software without restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.