package com.example.family;

import android.app.Activity;

import android.os.Bundle;

import androidx.annotation.Nullable;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import java.util.TreeMap;

import lecho.lib.hellocharts.model.ChartData;

import lecho.lib.hellocharts.model.Line;

import lecho.lib.hellocharts.model.LineChartData;

import lecho.lib.hellocharts.model.PointValue;

import lecho.lib.hellocharts.model.ValueShape;

import lecho.lib.hellocharts.util.ChartUtils;

import lecho.lib.hellocharts.view.Chart;

import lecho.lib.hellocharts.view.LineChartView;

public class ChartsActivity extends Activity {

    private LineChartView mChart;

    private Map<String,Integer> table=new TreeMap<>();

    private LineChartData mData;

    @Override

    protected void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.chart_view);

        mChart=(LineChartView) findViewById(R.id.chart);

        mData=new LineChartData();

        List<CostBean> allDate= (List<CostBean>) getIntent().getSerializableExtra("cost_list");

        generateValues(allDate);

        generateData();

    }

    private void generateData() {

        List<Line> lines=new ArrayList<>();

        List<PointValue> values=new ArrayList<>();

        int indexX=0;

        for (Integer value:table.values()){

            values.add(new PointValue(indexX,value));

            indexX++;

        }

        Line line=new Line(values);

        line.setColor(ChartUtils.COLORS[0]);

        line.setShape(ValueShape.CIRCLE);

        line.setPointColor(ChartUtils.COLORS[1]);

        lines.add(line);

        mData =new LineChartData(lines);

        mData.setLines(lines);

        mChart.setLineChartData(mData);

    }

    private void generateValues(List<CostBean> allDate) {

        if(allDate!=null){

            for(int i=0;i<allDate.size();i++){

                CostBean costBean=allDate.get(i);

                String costDate=costBean.costDate;

                int costMoney=Integer.parseInt(costBean.costMoney);

                if (!table.containsKey(costDate)){

                    table.put(costDate,costMoney);

                }else{

                    int originMoney=table.get(costDate);

                    table.put(costDate,originMoney+costMoney);

                }

            }

        }

    }

}

package com.example.family;

import android.content.DialogInterface;

import android.content.Intent;

import android.database.Cursor;

import android.os.Bundle;

import com.google.android.material.floatingactionbutton.FloatingActionButton;

import com.google.android.material.snackbar.Snackbar;

import androidx.appcompat.app.AlertDialog;

import androidx.appcompat.app.AppCompatActivity;

import androidx.appcompat.widget.Toolbar;

import android.view.LayoutInflater;

import android.view.View;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.Button;

import android.widget.DatePicker;

import android.widget.EditText;

import android.widget.ListView;

import java.io.Serializable;

import java.util.ArrayList;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    private List<CostBean> mCostBeanList;

    private DatabaseHelper mDatabaseHelper;

    private CostListAdapter mAdapter;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Toolbar toolbar = findViewById(R.id.toolbar);

        setSupportActionBar(toolbar);

        mDatabaseHelper=new DatabaseHelper(this);

        mCostBeanList=new ArrayList<>();

        ListView costList=(ListView)findViewById(R.id.lv_main);

        initCostData();

        mAdapter =new CostListAdapter(this,mCostBeanList);

        costList.setAdapter(mAdapter);

       FloatingActionButton btn_add = findViewById(R.id.btn_add);

        btn_add.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);

                LayoutInflater inflater=LayoutInflater.from(MainActivity.this);

                View viewDialog=inflater.inflate(R.layout.new_cost_data,null);

                final EditText title=(EditText)viewDialog.findViewById(R.id.et_cost_title);

                final EditText money=(EditText)viewDialog.findViewById(R.id.et_cost_money);

                final DatePicker date=(DatePicker) viewDialog.findViewById(R.id.dp_cost_date);

                builder.setView(viewDialog);

                builder.setTitle("New Cost");

                builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {

                    @Override

                    public void onClick(DialogInterface dialog, int which) {

                        CostBean costBean=new CostBean();

                        costBean.costTitle=title.getText().toString();

                        costBean.costMoney=money.getText().toString();

                        costBean.costDate=date.getYear() + "-" + (date.getMonth()+1) + "-" +

                                date.getDayOfMonth();

                        mDatabaseHelper.insertCost(costBean);

                        mCostBeanList.add(costBean);

                        mAdapter.notifyDataSetChanged();

                    }

                });

                builder.setNegativeButton("Cancle",null);

                builder.create().show();

            }

        });

private void initCostData() {

        Cursor cursor=mDatabaseHelper.getAllCostData();

        if(cursor!=null){

            while(cursor.moveToNext()){

                CostBean costBean=new CostBean();

                costBean.costTitle=cursor.getString(cursor.getColumnIndex("cost_title"));

                costBean.costDate=cursor.getString(cursor.getColumnIndex("cost_date"));

                costBean.costMoney=cursor.getString(cursor.getColumnIndex("cost_money"));

                mCostBeanList.add(costBean);

            }

            cursor.close();

        }

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();

        if (id == R.id.action_chart) {

            Intent intent=new Intent(MainActivity.this,ChartsActivity.class);

            intent.putExtra("cost_list", (Serializable) mCostBeanList);

            startActivity(intent);

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

}

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:padding="10dp">

    <lecho.lib.hellocharts.view.LineChartView

        android:id="@+id/chart"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:padding="20dp" />

</LinearLayout>

<activity

            android:name=".ChartsActivity"

            android:label="Chart"/>