Android 小工具--饼状图

1.导入依赖

第一步，先添加配置代码

maven { url "https://jitpack.io" }

第二步，添加依赖（记得点击同步）

implementation 'com.github.PhilJay:MPAndroidChart:v3.0.3'

2.Fragment代码

1.布局代码

<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <com.github.mikephil.charting.charts.PieChart android:id="@+id/pc" android:layout_width="match_parent" android:layout_height="match_parent"/> </androidx.constraintlayout.widget.ConstraintLayout>

2.java代码

public class Bt_Fragment extends Fragment { PieChart pc; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_zt_fragment, container, false); } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); pc = (PieChart) getActivity().findViewById(R.id.pc); List<PieEntry> yVals = new ArrayList<>(); int min = 40; int max = 50; Random random = new Random(); float num1 = random.nextInt(max) % (max - min + 1) + min; int min2 = 20; int max2 = 40; float num2 = random.nextInt(max2) % (max2 - min2 + 1) + min2; float num3 = 100 - num2 - num1; yVals.add(new PieEntry(num1, "白天")); yVals.add(new PieEntry(num2, "夜晚")); yVals.add(new PieEntry(num3, "凌晨")); pc.setEntryLabelTextSize(10f); pc.setCenterText("工作时间"); pc.setCenterTextSize(pc.getHoleRadius() / 3); List<Integer> colors = new ArrayList<>(); colors.add(Color.parseColor("#FF16E1A7")); colors.add(Color.parseColor("#0676D8")); colors.add(Color.parseColor("#FF7110FB")); PieDataSet pieDataSet = new PieDataSet(yVals, ""); pieDataSet.setColors(colors); PieData pieData = new PieData(pieDataSet); String descriptionStr = "今日使用手机时间分布"; Description description = new Description(); description.setText(descriptionStr); description.setTextColor(Color.WHITE); description.setTextSize(16); pc.setDescription(description); pc.setHoleColor(Color.parseColor("#5510C6DD")); float s = (float) (pc.getHoleRadius() / (8.5)); pc.setExtraOffsets(0f, s, 0f, s); description.setTextSize(10f); pc.setData(pieData); } }

3.Activity代码

布局文件

<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <FrameLayout android:id="@+id/frameLayout" android:layout_width="0dp" android:layout_height="300dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout>

2.java代码

public class MainActivity extends AppCompatActivity { Bt_Fragment mBt_fragment=new Bt_Fragment(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); getSupportFragmentManager().beginTransaction().replace(R.id.frameLayout,mBt_fragment).commit(); } }

运行

参考博客

官方文档