Android Open Source - WheelView Main Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.lukedeighton.wheelsample;
//www.  j  a  v a  2s.  c  om
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import com.lukedeighton.wheelview.WheelView;
import com.lukedeighton.wheelview.adapter.WheelArrayAdapter;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class MainActivity extends Activity {

    private static final int ITEM_COUNT = 20;

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

        WheelView wheelView = (WheelView) findViewById(R.id.wheelview);

        //create data for the adapter
        List<Map.Entry<String, Integer>> entries = new ArrayList<Map.Entry<String, Integer>>(ITEM_COUNT);
        for(int i = 0; i < ITEM_COUNT; i++) {
            Map.Entry<String, Integer> entry = MaterialColor.random(this, "\\D*_500$");
            entries.add(entry);
        }

        //populate the adapter, that knows how to draw each item (as you would do with a ListAdapter)
        wheelView.setAdapter(new MaterialColorAdapter(entries));

        //a listener for receiving a callback for when the item closest to the selection angle changes
        wheelView.setOnWheelItemSelectedListener(new WheelView.OnWheelItemSelectListener() {
            @Override
            public void onWheelItemSelected(WheelView parent, int position) {
                //get the item at this position
                Map.Entry<String, Integer> selectedEntry = ((MaterialColorAdapter) parent.getAdapter()).getItem(position);
                parent.setSelectionColor(getContrastColor(selectedEntry));
            }
        });

        wheelView.setOnWheelItemClickListener(new WheelView.OnWheelItemClickListener() {
            @Override
            public void onWheelItemClick(WheelView parent, int position, boolean isSelected) {
                String msg = String.valueOf(position) + " " + isSelected;
                Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
            }
        });

        //initialise the selection drawable with the first contrast color
        wheelView.setSelectionColor(getContrastColor(entries.get(0)));
    }

    //get the materials darker contrast
    private int getContrastColor(Map.Entry<String, Integer> entry) {
        String colorName = MaterialColor.getColorName(entry);
        return MaterialColor.getContrastColor(colorName);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    static class MaterialColorAdapter extends WheelArrayAdapter<Map.Entry<String, Integer>> {
        MaterialColorAdapter(List<Map.Entry<String, Integer>> entries) {
            super(entries);
        }

        @Override
        public Drawable getDrawable(int position) {
            Drawable[] drawable = new Drawable[] {
                    createOvalDrawable(getItem(position).getValue()),
                    new TextDrawable(String.valueOf(position))
            };
            return new LayerDrawable(drawable);
        }

        private Drawable createOvalDrawable(int color) {
            ShapeDrawable shapeDrawable = new ShapeDrawable(new OvalShape());
            shapeDrawable.getPaint().setColor(color);
            return shapeDrawable;
        }
    }
}

Java Source Code List

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