Android Chart Gallery MPAndroidChart(8) - Extension of Pie Chart: Polyline Pie Chart

Let's go on to see what we want to achieve by expanding the pie chart above and adding a discount explanation

Because of our previous familiarity with MPAndroidChart, we can do it directly

1. Basic implementation

First, let's look at his definition layout

<com.github.mikephil.charting.charts.PieChart android:id="@+id/mPieChart" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1"/>

Well, here we're still using PieChart, so why not now?

//Discount pie chart mPieChart = (PieChart) findViewById(R.id.mPieChart); mPieChart.setUsePercentValues(true); mPieChart.getDescription().setEnabled(false); mPieChart.setExtraOffsets(5, 10, 5, 5); mPieChart.setDragDecelerationFrictionCoef(0.95f); //Draw intermediate text mPieChart.setCenterText(generateCenterSpannableText()); mPieChart.setExtraOffsets(20.f, 0.f, 20.f, 0.f); mPieChart.setDrawHoleEnabled(true); mPieChart.setHoleColor(Color.WHITE); mPieChart.setTransparentCircleColor(Color.WHITE); mPieChart.setTransparentCircleAlpha(110); mPieChart.setHoleRadius(58f); mPieChart.setTransparentCircleRadius(61f); mPieChart.setDrawCenterText(true); mPieChart.setRotationAngle(0); // Touch Rotation mPieChart.setRotationEnabled(true); mPieChart.setHighlightPerTapEnabled(true); // Add a Selection Listener mPieChart.setOnChartValueSelectedListener(this); //Analog data ArrayList<PieEntry> entries = new ArrayList<PieEntry>(); entries.add(new PieEntry(40, "excellent")); entries.add(new PieEntry(20, "Full score")); entries.add(new PieEntry(30, "pass")); entries.add(new PieEntry(10, "Fail")); //Set up data setData(entries); //Default Animation mPieChart.animateY(1400, Easing.EasingOption.EaseInOutQuad); Legend l = mPieChart.getLegend(); l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP); l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT); l.setOrientation(Legend.LegendOrientation.VERTICAL); l.setDrawInside(false); l.setEnabled(false);

We need our setup data

//Set up data private void setData(ArrayList<PieEntry> entries) { PieDataSet dataSet = new PieDataSet(entries, "Class 1, Grade 3"); dataSet.setSliceSpace(3f); dataSet.setSelectionShift(5f); 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); dataSet.setValueLinePart1OffsetPercentage(80.f); dataSet.setValueLinePart1Length(0.2f); dataSet.setValueLinePart2Length(0.4f); dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE); PieData data = new PieData(dataSet); data.setValueFormatter(new PercentFormatter()); data.setValueTextSize(11f); data.setValueTextColor(Color.BLACK); mPieChart.setData(data); // Undo all highlights mPieChart.highlightValues(null); mPieChart.invalidate(); }

Here, you can't lose the middle text

//Draw Center Text private SpannableString generateCenterSpannableText() { SpannableString s = new SpannableString("A programmer named Liu\n I seem to hear someone say I'm handsome"); //s.setSpan(new RelativeSizeSpan(1.5f), 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(.65f), 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()-17, s.length(), 0); return s; }

Now it's okay to run it. It's not difficult. Let's see how it works

2. Display Percentage

3. Display type

4.x-axis animation

5.y-axis animation

6.xy axis animation

7. Display intermediate text

8. Rotate Animation

Paste the code here

activity_pie_line.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <com.github.mikephil.charting.charts.PieChart android:id="@+id/mPieChart" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1"/>  <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/btn_show_percentage" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Display Percentage"/> <Button android:id="@+id/btn_show_type" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Is it paved"/> <Button android:id="@+id/btn_anim_x" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="X Axis Animation"/> <Button android:id="@+id/btn_anim_y" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Y Axis Animation"/> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/btn_anim_xy" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="XY Axis Animation"/> <Button android:id="@+id/btn_show_center_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Show middle text"/> <Button android:id="@+id/btn_save_pic" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Save Gallery"/> <Button android:id="@+id/btn_anim_rotating" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Rotate Animation"/> </LinearLayout> </LinearLayout>

PiePolylineChartActivity

public class PiePolylineChartActivity extends BaseActivity implements OnChartValueSelectedListener, View.OnClickListener { private PieChart mPieChart; //Display Percentage private Button btn_show_percentage; //Display type private Button btn_show_type; //x-axis animation private Button btn_anim_x; //y-axis animation private Button btn_anim_y; //xy-axis animation private Button btn_anim_xy; //Save to sd card private Button btn_save_pic; //Show middle text private Button btn_show_center_text; //Rotate Animation private Button btn_anim_rotating; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_pie_line); initView(); } //Initialization private void initView() { btn_show_percentage = (Button) findViewById(R.id.btn_show_percentage); btn_show_percentage.setOnClickListener(this); btn_show_type = (Button) findViewById(R.id.btn_show_type); btn_show_type.setOnClickListener(this); btn_anim_x = (Button) findViewById(R.id.btn_anim_x); btn_anim_x.setOnClickListener(this); btn_anim_y = (Button) findViewById(R.id.btn_anim_y); btn_anim_y.setOnClickListener(this); btn_anim_xy = (Button) findViewById(R.id.btn_anim_xy); btn_anim_xy.setOnClickListener(this); btn_save_pic = (Button) findViewById(R.id.btn_save_pic); btn_save_pic.setOnClickListener(this); btn_show_center_text = (Button) findViewById(R.id.btn_show_center_text); btn_show_center_text.setOnClickListener(this); btn_anim_rotating = (Button) findViewById(R.id.btn_anim_rotating); btn_anim_rotating.setOnClickListener(this); //Discount pie chart mPieChart = (PieChart) findViewById(R.id.mPieChart); mPieChart.setUsePercentValues(true); mPieChart.getDescription().setEnabled(false); mPieChart.setExtraOffsets(5, 10, 5, 5); mPieChart.setDragDecelerationFrictionCoef(0.95f); //Draw intermediate text mPieChart.setCenterText(generateCenterSpannableText()); mPieChart.setExtraOffsets(20.f, 0.f, 20.f, 0.f); mPieChart.setDrawHoleEnabled(true); mPieChart.setHoleColor(Color.WHITE); mPieChart.setTransparentCircleColor(Color.WHITE); mPieChart.setTransparentCircleAlpha(110); mPieChart.setHoleRadius(58f); mPieChart.setTransparentCircleRadius(61f); mPieChart.setDrawCenterText(true); mPieChart.setRotationAngle(0); // Touch Rotation mPieChart.setRotationEnabled(true); mPieChart.setHighlightPerTapEnabled(true); // Add a Selection Listener mPieChart.setOnChartValueSelectedListener(this); //Analog data ArrayList<PieEntry> entries = new ArrayList<PieEntry>(); entries.add(new PieEntry(40, "excellent")); entries.add(new PieEntry(20, "Full score")); entries.add(new PieEntry(30, "pass")); entries.add(new PieEntry(10, "Fail")); //Set up data setData(entries); //Default Animation mPieChart.animateY(1400, Easing.EasingOption.EaseInOutQuad); Legend l = mPieChart.getLegend(); l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP); l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT); l.setOrientation(Legend.LegendOrientation.VERTICAL); l.setDrawInside(false); l.setEnabled(false); } //Set up data private void setData(ArrayList<PieEntry> entries) { PieDataSet dataSet = new PieDataSet(entries, "Class 1, Grade 3"); dataSet.setSliceSpace(3f); dataSet.setSelectionShift(5f); 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); dataSet.setValueLinePart1OffsetPercentage(80.f); dataSet.setValueLinePart1Length(0.2f); dataSet.setValueLinePart2Length(0.4f); dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE); PieData data = new PieData(dataSet); data.setValueFormatter(new PercentFormatter()); data.setValueTextSize(11f); data.setValueTextColor(Color.BLACK); mPieChart.setData(data); // Undo all highlights mPieChart.highlightValues(null); mPieChart.invalidate(); } //Draw Center Text private SpannableString generateCenterSpannableText() { SpannableString s = new SpannableString("A programmer named Liu\n I seem to hear someone say I'm handsome"); //s.setSpan(new RelativeSizeSpan(1.5f), 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(.65f), 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()-17, s.length(), 0); return s; } @Override public void onValueSelected(Entry e, Highlight h) { } @Override public void onNothingSelected() { } @Override public void onClick(View v) { switch (v.getId()) { //Display Percentage case R.id.btn_show_percentage: for (IDataSet<?> set : mPieChart.getData().getDataSets()) set.setDrawValues(!set.isDrawValuesEnabled()); mPieChart.invalidate(); break; //Display type case R.id.btn_show_type: if (mPieChart.isDrawHoleEnabled()) mPieChart.setDrawHoleEnabled(false); else mPieChart.setDrawHoleEnabled(true); mPieChart.invalidate(); break; //x-axis animation case R.id.btn_anim_x: mPieChart.animateX(1400); break; //y-axis animation case R.id.btn_anim_y: mPieChart.animateY(1400); break; //xy-axis animation case R.id.btn_anim_xy: mPieChart.animateXY(1400, 1400); break; //Save to sd card case R.id.btn_save_pic: mPieChart.saveToPath("title" + System.currentTimeMillis(), ""); break; //Show middle text case R.id.btn_show_center_text: if (mPieChart.isDrawCenterTextEnabled()) mPieChart.setDrawCenterText(false); else mPieChart.setDrawCenterText(true); mPieChart.invalidate(); break; //Rotate Animation case R.id.btn_anim_rotating: mPieChart.spin(1000, mPieChart.getRotationAngle(), mPieChart.getRotationAngle() + 360, Easing.EasingOption .EaseInCubic); break; } } }

Okay, is it easy?

Interested Groups: 555974449

Sample:http://download.csdn.net/detail/qq_26787115/9689868

From: http://blog.csdn.net/qq_26787115/article/details/53258500