android studio记账,Android Studio--家庭记账本（三）

点击右上角可以实现将花费以折线图的形式显示出来。同时将同一天的花费自动计算。暂时还没有加x,y轴

ChartsActivity.java：

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 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 allDate= (List) getIntent().getSerializableExtra("cost_list");

generateValues(allDate);

generateData();

}

private void generateData() {

List lines=new ArrayList<>();

List 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 allDate) {

if(allDate!=null){

for(int i=0;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);

}

}

}

}

}

MainActivity.java：

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 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);

}

}

chart_view.xml:

android:orientation="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:padding="10dp">

android:id="@+id/chart"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:padding="20dp" />

注意：在AndroidMainifest.xml中添加

android:name=".ChartsActivity"

android:label="Chart"/>

来源：https://www.cnblogs.com/xhj1074376195/p/12299550.html