HelloCharts pie餅圖繪制

先引用hellocharts-library-<version>.jar

 

然后在layout中設置

 

<lecho.lib.hellocharts.view.PieChartView
        android:id="@+id/chart"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    </LinearLayout>

 

 

 

package com.example.chardemo;

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

import lecho.lib.hellocharts.gesture.ZoomType;
import lecho.lib.hellocharts.model.PieChartData;
import lecho.lib.hellocharts.model.SliceValue;
import lecho.lib.hellocharts.renderer.PieChartRenderer;
import lecho.lib.hellocharts.util.ChartUtils;
import lecho.lib.hellocharts.view.PieChartView;
import android.graphics.Typeface;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;

public class MainActivity extends ActionBarActivity
{
   private PieChartView chart;
   private PieChartData data;
    
   private boolean hasLabels = true;//是否在薄片上顯示label
   private boolean hasLabelsOutside = false;//是否在薄片外顯示label
   private boolean hasCenterCircle = false;//是否中間掏空一個圈
   private boolean hasCenterText1 = true;//掏空圈是的title1
   private boolean hasCenterText2 = true;//掏空圈是的title2
   private boolean isExploded = false;//薄片是否分離
   private boolean hasLabelForSelected = false;
    
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        chart = (PieChartView)findViewById(R.id.chart);
        generateData();
    
    }

    private void generateData()
    {
        int numValues = 3;

        List<SliceValue> values = new ArrayList<SliceValue>();
        for (int i = 0; i < numValues; ++i)
        {
            SliceValue sliceValue = new SliceValue(
                    (float) Math.random() * 30 + 15, ChartUtils.pickColor());
            sliceValue.setLabel((int)sliceValue.getValue()+"瓶");//設置label
            values.add(sliceValue);
        }

        data = new PieChartData(values);
        data.setHasLabels(hasLabels);
        data.setHasLabelsOnlyForSelected(hasLabelForSelected);
        data.setHasLabelsOutside(hasLabelsOutside);
        data.setHasCenterCircle(hasCenterCircle);

        if (isExploded)
        {
            data.setSlicesSpacing(24);//設置分離距離
        }

        if (hasCenterText1)
        {
            data.setCenterText1("Hello!");

            // Get roboto-italic font.
            Typeface tf = Typeface.createFromAsset(this.getAssets(),"Roboto-Italic.ttf");//自定義的字體
            data.setCenterText1Typeface(tf);

            // Get font size from dimens.xml and convert it to sp(library uses
            // sp values).
            data.setCenterText1FontSize(ChartUtils.px2sp(getResources()
                    .getDisplayMetrics().scaledDensity, (int) getResources()
                    .getDimension(R.dimen.pie_chart_text1_size)));
        }

        if (hasCenterText2)
        {
            data.setCenterText2("Charts (Roboto Italic)");

            Typeface tf = Typeface.createFromAsset(this.getAssets(),
                    "Roboto-Italic.ttf");
            data.setCenterText2Typeface(tf);
            data.setCenterText2FontSize(ChartUtils.px2sp(getResources()
                    .getDisplayMetrics().scaledDensity, (int) getResources()
                    .getDimension(R.dimen.pie_chart_text1_size)));
        }
        
        chart.setPieChartData(data);
        chart.setCircleFillRatio(0.5f);//設置放大縮小范圍
    }

}

 

效果圖