Android开源图表之树状图和饼状图的官方示例的整理

　　最近由于工作需要，所以就在github上搜了下关于chart的三方框架

　　官方地址https://github.com/PhilJay/MPAndroidChart

　　由于工作需要我这里整理了一份Eclipse版本的类库.（有需要要的留下邮箱）

　　

　　　　这就是Code中的效果(树状图)

　　　　

 public class BarChartActivity extends Activity implements OnChartValueSelectedListener{

     private BarChart mChart;
     private Typeface mTfLight;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_barchart);

         mTfLight = Typeface.createFromAsset(getAssets(), "OpenSans-Light.ttf");

         mChart = (BarChart) findViewById(R.id.chart1);
         mChart.setOnChartValueSelectedListener(this);

         mChart.setDrawBarShadow(false);//--绘制当前展示的内容顶部阴影
         mChart.setDrawValueAboveBar(true);//--绘制的图形都在bar顶部

         mChart.setDescription("");

         // if more than 60 entries are displayed in the chart, no values will be
         // drawn
         mChart.setMaxVisibleValueCount(80); //Y方向的最大值.

         // scaling can now only be done on x- and y-axis separately
         mChart.setPinchZoom(false);  //--双指缩放.

         mChart.setDrawGridBackground(false);//--绘制中心内容区域背景色.
         // mChart.setDrawYLabels(false);

         XAxis xAxis = mChart.getXAxis();
         xAxis.setPosition(XAxisPosition.BOTTOM);
         xAxis.setTypeface(mTfLight);
         xAxis.setDrawGridLines(false);//--是否绘制竖直分割线.
         xAxis.setGranularity(1f); // only intervals of 1 day  底部label的分割间隙
         xAxis.setLabelCount(5);  //--对应的当前绘制在底部的label数
         xAxis.setValueFormatter(new DayAxisValueFormatter(mChart));

         AxisValueFormatter custom = new MyAxisValueFormatter();

         YAxis leftAxis = mChart.getAxisLeft();
         leftAxis.setTypeface(mTfLight);
         leftAxis.setDrawGridLines(false); //-绘制水平分割线，按照当前Y方向的label点为起始点
         leftAxis.setLabelCount(8, false); //--绘制Y方向(应该)被显示的数量，第二个参数表示label是否是精准变化，还是近似变化
         leftAxis.setValueFormatter(custom);
         leftAxis.setPosition(YAxisLabelPosition.OUTSIDE_CHART);//Y方向文字的位置，在线外侧.(默认在外侧)
         leftAxis.setSpaceTop(15f);  //分割线的间距百分比.
         leftAxis.setAxisMinValue(0f); // this replaces setStartAtZero(true)  Y方向的起始值.

         YAxis rightAxis = mChart.getAxisRight();
         rightAxis.setDrawGridLines(true); //-绘制水平分割线，按照当前Y方向的label点为起始点
         rightAxis.setTypeface(mTfLight);
         rightAxis.setLabelCount(8, false);
         rightAxis.setValueFormatter(custom);
         rightAxis.setSpaceTop(15f);
         rightAxis.setAxisMinValue(0f); // this replaces setStartAtZero(true)

         Legend l = mChart.getLegend();
         l.setForm(LegendForm.SQUARE); //--设置legend的形状.
         l.setPosition(LegendPosition.BELOW_CHART_LEFT); //--设置legend的位置.
         l.setFormSize(12f);            //--设置legend的大小
         l.setTextSize(12f);               //--设置legend上的文字大小
 //        l.setXEntrySpace(100f);
         l.setYOffset(30f);
         // l.setExtra(ColorTemplate.VORDIPLOM_COLORS, new String[] { "abc",
         // "def", "ghj", "ikl", "mno" });
         // l.setCustom(ColorTemplate.VORDIPLOM_COLORS, new String[] { "abc",
         // "def", "ghj", "ikl", "mno" });
         mChart.animateY(3000);
         mChart.setPinchZoom(true);
         setData(12, 80);
     }

     private void setData(int count, float range) {

         float start = 0f;

         mChart.getXAxis().setAxisMinValue(start);
         mChart.getXAxis().setAxisMaxValue(start + count + 2);

         ArrayList<BarEntry> yVals1 = new ArrayList<BarEntry>();

         for (int i = (int) start; i < start + count + 1; i++) {
             float mult = (range + 1);
             float val = (float) (Math.random() * mult);
             BarEntry barEntry = new BarEntry(i + 1f, val);

             yVals1.add(barEntry);
         }

         BarDataSet set1;

         if (mChart.getData() != null &&
                 mChart.getData().getDataSetCount() > 0) {
             set1 = (BarDataSet) mChart.getData().getDataSetByIndex(0);
             set1.setValues(yVals1);
             mChart.getData().notifyDataChanged();
             mChart.notifyDataSetChanged();
         } else {
             set1 = new BarDataSet(yVals1, "The year 2017");
             set1.setBarBorderWidth(1);
             set1.setColors(ColorTemplate.MATERIAL_COLORS);

             ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();
             dataSets.add(set1);

             BarData data = new BarData(dataSets);
             data.setValueTextSize(10f);
             data.setValueTypeface(mTfLight);

             data.setBarWidth(0.8f);//--设置bar的宽度 ,取值(0-1).

             mChart.setData(data);
         }
     }

     protected RectF mOnValueSelectedRectF = new RectF();

     @Override
     public void onValueSelected(Entry e, Highlight h) {
         // TODO Auto-generated method stub
          if (e == null)
                 return;

             RectF bounds = mOnValueSelectedRectF;
             mChart.getBarBounds((BarEntry) e, bounds);
             MPPointF position = mChart.getPosition(e, AxisDependency.LEFT);

             Log.i("bounds", bounds.toString());
             Log.i("position", position.toString());

             Log.i("x-index",
                     "low: " + mChart.getLowestVisibleX() + ", high: "
                             + mChart.getHighestVisibleX());

             MPPointF.recycleInstance(position);
     }

     @Override
     public void onNothingSelected() {
         // TODO Auto-generated method stub

     }

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

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {

         switch (item.getItemId()) {
             case R.id.actionToggleValues: {
                 for (IDataSet set : mChart.getData().getDataSets())
                     set.setDrawValues(!set.isDrawValuesEnabled());

                 mChart.invalidate();
                 break;
             }
             case R.id.actionToggleHighlight: {
                 if (mChart.getData() != null) {
                     mChart.getData().setHighlightEnabled(!mChart.getData().isHighlightEnabled());
                     mChart.invalidate();
                 }
                 break;
             }
             case R.id.actionTogglePinch: {
                 if (mChart.isPinchZoomEnabled())
                     mChart.setPinchZoom(false);
                 else
                     mChart.setPinchZoom(true);

                 mChart.invalidate();
                 break;
             }
             case R.id.actionToggleAutoScaleMinMax: {
                 mChart.setAutoScaleMinMaxEnabled(!mChart.isAutoScaleMinMaxEnabled());
                 mChart.notifyDataSetChanged();
                 break;
             }
             case R.id.actionToggleBarBorders: {
                 for (IBarDataSet set : mChart.getData().getDataSets())
                     ((BarDataSet) set).setBarBorderWidth(set.getBarBorderWidth() == 1.f ? 0.f : 1.f);

                 mChart.invalidate();
                 break;
             }
             case R.id.animateX: {
                 mChart.animateX(3000);
                 break;
             }
             case R.id.animateY: {
                 mChart.animateY(3000);
                 break;
             }
             case R.id.animateXY: {

                 mChart.animateXY(3000, 3000);
                 break;
             }
             case R.id.actionSave: {
                 if (mChart.saveToGallery("title" + System.currentTimeMillis(), 50)) {
                     Toast.makeText(getApplicationContext(), "Saving SUCCESSFUL!",
                             Toast.LENGTH_SHORT).show();
                 } else
                     Toast.makeText(getApplicationContext(), "Saving FAILED!", Toast.LENGTH_SHORT)
                             .show();
                 break;
             }
         }
         return true;
     }

　　　　上述代码中关键点已经加入注释，纯属自己个个人研究理解，那里理解不对的地方，回应告知

　　　说完树状图紧接着就是饼状图我这里分别实现了两种，不过基本code都是一样的

　　　　不多说直接上代码：

　　

 public class PieChartActivity extends Activity implements OnChartValueSelectedListener {

     private PieChart mChart;
     private Typeface mTfRegular;
     private Typeface mTfLight;

     protected String[] mMonths = new String[] {
                 "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dec"
     };

     protected String[] mParties = new String[] {
             "Party A", "Party B", "Party C", "Party D", "Party E", "Party F", "Party G", "Party H",
             "Party I", "Party J", "Party K", "Party L", "Party M", "Party N", "Party O", "Party P",
             "Party Q", "Party R", "Party S", "Party T", "Party U", "Party V", "Party W", "Party X",
             "Party Y", "Party Z"
     };

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

         mTfRegular = Typeface.createFromAsset(getAssets(), "OpenSans-Regular.ttf");
         mTfLight = Typeface.createFromAsset(getAssets(), "OpenSans-Light.ttf");

         mChart = (PieChart) findViewById(R.id.chart1);
         mChart.setUsePercentValues(true);
         mChart.setDescription("描述内容");
         mChart.setDescriptionTextSize(20);

         mChart.setExtraOffsets(5, 5, 5, 5);

         mChart.setDragDecelerationFrictionCoef(0.95f);

         mChart.setCenterTextTypeface(mTfLight);
         mChart.setCenterText(generateCenterSpannableText());//--设置中心点文字

         mChart.setDrawHoleEnabled(true);
         mChart.setHoleColor(Color.RED);

         mChart.setTransparentCircleColor(Color.BLUE);//--内圆边框色
         mChart.setTransparentCircleAlpha(110);       //--内圆边框透明度

         mChart.setHoleRadius(58f); //--内院半径
         mChart.setTransparentCircleRadius(61f); //--内圆边框大小半径

         mChart.setDrawCenterText(true);

         mChart.setRotationAngle(0); //--绘制的开始位置
         // enable rotation of the chart by touch
         mChart.setRotationEnabled(true);     //--允许旋转
         mChart.setHighlightPerTapEnabled(true); //---允许点击其中某个扇形区域.

         // add a selection listener
         mChart.setOnChartValueSelectedListener(this);

         setData(8, 100);

         mChart.animateY(1400, Easing.EasingOption.EaseInOutQuad);

         Legend l = mChart.getLegend();
         l.setPosition(LegendPosition.RIGHT_OF_CHART);
         l.setXEntrySpace(100f);
         l.setYEntrySpace(0f);
         l.setYOffset(0f);

         // entry label styling
         mChart.setEntryLabelColor(Color.RED); //--设置饼状图其中各个块上的文字颜色
         mChart.setEntryLabelTypeface(mTfRegular);//---设置字体
         mChart.setEntryLabelTextSize(24f);    //--设置字体大小
     }

      private void setData(int count, float range) {

             float mult = range;

             ArrayList<PieEntry> entries = new ArrayList<PieEntry>();

             // NOTE: The order of the entries when being added to the entries array determines their position around the center of
             // the chart.
             for (int i = 0; i < count ; i++) {
                 entries.add(new PieEntry((float) ((Math.random() * mult) + mult / 5), mParties[i % mParties.length]));
             }

 //            PieEntry --参数说明：第一个参数代表半分比，第二个参数表示名字。

             PieDataSet dataSet = new PieDataSet(entries, "<一张图>");
             dataSet.setSliceSpace(6f);//--饼状图
             dataSet.setSelectionShift(15f);//--选中饼状图时，向外扩张的大小.

             // add a lot of colors

             ArrayList<Integer> colors = new ArrayList<Integer>();

             for (int c : ColorTemplate.VORDIPLOM_COLORS)
                 colors.add(c);

             for (int c : ColorTemplate.JOYFUL_COLORS)
                 colors.add(c);

             for (int c : ColorTemplate.COLORFUL_COLORS)
                 colors.add(c);

             for (int c : ColorTemplate.LIBERTY_COLORS)
                 colors.add(c);

             for (int c : ColorTemplate.PASTEL_COLORS)
                 colors.add(c);

             colors.add(ColorTemplate.getHoloBlue());

             dataSet.setColors(colors);

             PieData data = new PieData(dataSet);
             data.setValueFormatter(new PercentFormatter());
             data.setValueTextSize(20f);       //--设置字体大小
             data.setValueTextColor(Color.RED);//--设置饼状图其中各个块上的百分比颜色
             data.setValueTypeface(mTfLight);  //--设置字体
             mChart.setData(data);

             // undo all highlights
             mChart.highlightValues(null);

             mChart.invalidate();
         }

     private SpannableString generateCenterSpannableText() {

         SpannableString s = new SpannableString("MPAndroidChart\ndeveloped by Philipp Jahoda");
         s.setSpan(new RelativeSizeSpan(1.7f), 0, 14, 0);
         s.setSpan(new StyleSpan(Typeface.NORMAL), 14, s.length() - 15, 0);
         s.setSpan(new ForegroundColorSpan(Color.GRAY), 14, s.length() - 15, 0);
         s.setSpan(new RelativeSizeSpan(.8f), 14, s.length() - 15, 0);
         s.setSpan(new StyleSpan(Typeface.ITALIC), s.length() - 14, s.length(), 0);
         s.setSpan(new ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length() - 14, s.length(), 0);
         return s;
     }

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

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {

         switch (item.getItemId()) {
             case R.id.actionToggleValues: {
                 for (IDataSet<?> set : mChart.getData().getDataSets())
                     set.setDrawValues(!set.isDrawValuesEnabled());

                 mChart.invalidate();
                 break;
             }
             case R.id.actionToggleHole: {
                 if (mChart.isDrawHoleEnabled())
                     mChart.setDrawHoleEnabled(false);
                 else
                     mChart.setDrawHoleEnabled(true);
                 mChart.invalidate();
                 break;
             }
             case R.id.actionDrawCenter: {
                 if (mChart.isDrawCenterTextEnabled())
                     mChart.setDrawCenterText(false);
                 else
                     mChart.setDrawCenterText(true);
                 mChart.invalidate();
                 break;
             }
             case R.id.actionToggleXVals: {

                 mChart.setDrawEntryLabels(!mChart.isDrawEntryLabelsEnabled());
                 mChart.invalidate();
                 break;
             }
             case R.id.actionSave: {
                 // mChart.saveToGallery("title"+System.currentTimeMillis());
                 mChart.saveToPath("title" + System.currentTimeMillis(), "");
                 break;
             }
             case R.id.actionTogglePercent:
                 mChart.setUsePercentValues(!mChart.isUsePercentValuesEnabled());
                 mChart.invalidate();
                 break;
             case R.id.animateX: {
                 mChart.animateX(1400);
                 break;
             }
             case R.id.animateY: {
                 mChart.animateY(1400);
                 break;
             }
             case R.id.animateXY: {
                 mChart.animateXY(1400, 1400);
                 break;
             }
             case R.id.actionToggleSpin: {
                 mChart.spin(1000, mChart.getRotationAngle(), mChart.getRotationAngle() + 360, Easing.EasingOption
                         .EaseInCubic);
                 break;
             }
         }
         return true;
     }

     @Override
     public void onValueSelected(Entry e, Highlight h) {
         // TODO Auto-generated method stub
          if (e == null)
                 return;
             Log.i("VAL SELECTED",
                     "Value: " + e.getY() + ", index: " + h.getX()
                             + ", DataSet index: " + h.getDataSetIndex());

     }

     @Override
     public void onNothingSelected() {
         // TODO Auto-generated method stub
         Log.i("PieChart", "nothing selected");
     }

 }