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接上文,今天实现的是用的很多的,作用在统计上的饼状图,我们看下今天的效果
这个效果,我们实现,和之前一样的套路,我先来说下这个的应用场景,假设,我是一名小学老师,现在教务处让我设置一个图表,说明下我带的班级期末考试有多少人优秀,多少人及格和不及格等等,而这些呢,我已经算出来百分比了,只剩下画图了,那好,我们就来实现以下吧
首先是我们的布局
- <com.github.mikephil.charting.charts.PieChart
- android:id="@+id/mPieChart"
- android:layout_width="match_parent"
- android:layout_height="0dp"
- android:layout_weight="1"/>
我们的饼状图是PieChart,然后进行初始化
- //饼状图
- mPieChart = (PieChart) findViewById(R.id.mPieChart);
- mPieChart.setUsePercentValues(true);
- mPieChart.getDescription().setEnabled(false);
- mPieChart.setExtraOffsets(5, 10, 5, 5);
-
- mPieChart.setDragDecelerationFrictionCoef(0.95f);
- //设置中间文件
- mPieChart.setCenterText(generateCenterSpannableText());
-
- 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);
- // 触摸旋转
- mPieChart.setRotationEnabled(true);
- mPieChart.setHighlightPerTapEnabled(true);
-
- //变化监听
- mPieChart.setOnChartValueSelectedListener(this);
饼状图还是比较简单粗暴的,这里我们把数据写上去
- //模拟数据
- ArrayList<PieEntry> entries = new ArrayList<PieEntry>();
- entries.add(new PieEntry(40, "优秀"));
- entries.add(new PieEntry(20, "满分"));
- entries.add(new PieEntry(30, "及格"));
- entries.add(new PieEntry(10, "不及格"));
-
- //设置数据
- setData(entries);
-
- 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.setXEntrySpace(7f);
- l.setYEntrySpace(0f);
- l.setYOffset(0f);
-
- // 输入标签样式
- mPieChart.setEntryLabelColor(Color.WHITE);
- mPieChart.setEntryLabelTextSize(12f);
这里有一点要注意,他中间也是有文字的,当然,你也是可以关闭的,我们就不给他设置更多的属性了,大家有兴趣自己去实现下,我注释掉的部分
- //设置中间文字
- private SpannableString generateCenterSpannableText() {
- //原文:MPAndroidChart\ndeveloped by Philipp Jahoda
- SpannableString s = new SpannableString("刘某人程序员\n我仿佛听到有人说我帅");
- //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;
- }
关于设置数据,就是调用我们的setdata方法
- //设置数据
- private void setData(ArrayList<PieEntry> entries) {
- PieDataSet dataSet = new PieDataSet(entries, "三年级一班");
- dataSet.setSliceSpace(3f);
- dataSet.setSelectionShift(5f);
-
- //数据和颜色
- 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(11f);
- data.setValueTextColor(Color.WHITE);
- mPieChart.setData(data);
- mPieChart.highlightValues(null);
- //刷新
- mPieChart.invalidate();
- }
现在运行,就是实现的了,我们再来看下其他的效果
这些细节都是一句话就能实现的,仔细看下嘛的代码
- <?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="显示百分比"/>
-
- <Button
- android:id="@+id/btn_show_type"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="是否铺满"/>
-
- <Button
- android:id="@+id/btn_anim_x"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="X轴动画"/>
-
- <Button
- android:id="@+id/btn_anim_y"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="Y轴动画"/>
-
- </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轴动画"/>
-
- <Button
- android:id="@+id/btn_show_center_text"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="显示中间文字"/>
-
- <Button
- android:id="@+id/btn_save_pic"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="保存画廊"/>
-
- <Button
- android:id="@+id/btn_anim_rotating"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="旋转动画"/>
-
- </LinearLayout>
-
- </LinearLayout>
-
- public class PieChartActivity extends BaseActivity implements OnChartValueSelectedListener, View.OnClickListener {
-
- private PieChart mPieChart;
-
- //显示百分比
- private Button btn_show_percentage;
- //显示类型
- private Button btn_show_type;
- //x轴动画
- private Button btn_anim_x;
- //y轴动画
- private Button btn_anim_y;
- //xy轴动画
- private Button btn_anim_xy;
- //保存到sd卡
- private Button btn_save_pic;
- //显示中间文字
- private Button btn_show_center_text;
- //旋转动画
- private Button btn_anim_rotating;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_piechart);
-
- initView();
- }
-
- //初始化View
- 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);
-
-
- //饼状图
- mPieChart = (PieChart) findViewById(R.id.mPieChart);
- mPieChart.setUsePercentValues(true);
- mPieChart.getDescription().setEnabled(false);
- mPieChart.setExtraOffsets(5, 10, 5, 5);
-
- mPieChart.setDragDecelerationFrictionCoef(0.95f);
- //设置中间文件
- mPieChart.setCenterText(generateCenterSpannableText());
-
- 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);
- // 触摸旋转
- mPieChart.setRotationEnabled(true);
- mPieChart.setHighlightPerTapEnabled(true);
-
- //变化监听
- mPieChart.setOnChartValueSelectedListener(this);
-
- //模拟数据
- ArrayList<PieEntry> entries = new ArrayList<PieEntry>();
- entries.add(new PieEntry(40, "优秀"));
- entries.add(new PieEntry(20, "满分"));
- entries.add(new PieEntry(30, "及格"));
- entries.add(new PieEntry(10, "不及格"));
-
- //设置数据
- setData(entries);
-
- 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.setXEntrySpace(7f);
- l.setYEntrySpace(0f);
- l.setYOffset(0f);
-
- // 输入标签样式
- mPieChart.setEntryLabelColor(Color.WHITE);
- mPieChart.setEntryLabelTextSize(12f);
- }
-
- //设置中间文字
- private SpannableString generateCenterSpannableText() {
- //原文:MPAndroidChart\ndeveloped by Philipp Jahoda
- SpannableString s = new SpannableString("刘某人程序员\n我仿佛听到有人说我帅");
- //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;
- }
-
- //设置数据
- private void setData(ArrayList<PieEntry> entries) {
- PieDataSet dataSet = new PieDataSet(entries, "三年级一班");
- dataSet.setSliceSpace(3f);
- dataSet.setSelectionShift(5f);
-
- //数据和颜色
- 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(11f);
- data.setValueTextColor(Color.WHITE);
- mPieChart.setData(data);
- mPieChart.highlightValues(null);
- //刷新
- mPieChart.invalidate();
- }
-
-
- @Override
- public void onValueSelected(Entry e, Highlight h) {
-
- }
-
- @Override
- public void onNothingSelected() {
-
- }
-
- @Override
- public void onClick(View v) {
- switch (v.getId()) {
- //显示百分比
- case R.id.btn_show_percentage:
- for (IDataSet<?> set : mPieChart.getData().getDataSets())
- set.setDrawValues(!set.isDrawValuesEnabled());
-
- mPieChart.invalidate();
- break;
- //显示类型
- case R.id.btn_show_type:
- if (mPieChart.isDrawHoleEnabled())
- mPieChart.setDrawHoleEnabled(false);
- else
- mPieChart.setDrawHoleEnabled(true);
- mPieChart.invalidate();
- break;
- //x轴动画
- case R.id.btn_anim_x:
- mPieChart.animateX(1400);
- break;
- //y轴动画
- case R.id.btn_anim_y:
- mPieChart.animateY(1400);
- break;
- //xy轴动画
- case R.id.btn_anim_xy:
- mPieChart.animateXY(1400, 1400);
- break;
- //保存到sd卡
- case R.id.btn_save_pic:
- mPieChart.saveToPath("title" + System.currentTimeMillis(), "");
- break;
- //显示中间文字
- case R.id.btn_show_center_text:
- if (mPieChart.isDrawCenterTextEnabled())
- mPieChart.setDrawCenterText(false);
- else
- mPieChart.setDrawCenterText(true);
- mPieChart.invalidate();
- break;
- //旋转动画
- case R.id.btn_anim_rotating:
- mPieChart.spin(1000, mPieChart.getRotationAngle(), mPieChart.getRotationAngle() + 360, Easing.EasingOption
- .EaseInCubic);
- break;
- }
- }
- }
是不是觉得很欢快呢?就是这样,我都有考虑是不是要二次封装一个MP了,因为基本的套路都是一模一样的,好了,接下来,我们最后看下运行效果
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