2.15

package com.example.myapplication;

import android.annotation.SuppressLint;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.os.Message;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.AdapterView;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import java.util.ArrayList;
import java.util.List;
import android.os.Handler;

public class monthActivity extends AppCompatActivity {
    List<String> list;
    private ImageButton Add;
    private DBHelper helper;
    private ListView listView;
    private Runnable mRunnable = new Runnable() {
        @Override
        public void run() {
            while(true){
                try {
                    //sleep2秒，可根据需求更换为响应的时间
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                mHandler.sendMessage(mHandler.obtainMessage());
            }
        }
    };
    //调用定时刷新函数
    private Handler mHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            refresh();//编写的定时刷新函数
        }
    };
    private void refresh() {
        iniView();
    }

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.month);
        Add=findViewById(R.id.add);
        listView=findViewById(R.id.l_month);
        iniView();
        new Thread(mRunnable).start();
    }
    @SuppressLint("Range")
    private void iniView()
    {
        helper=new DBHelper(monthActivity.this);
        list=new ArrayList<>();
        SQLiteDatabase db=helper.getReadableDatabase();
        Cursor cursor=db.query("account2",null,null,null,null,
                null,null);
        while (cursor.moveToNext()){
            String mon=cursor.getString(cursor.getColumnIndex("Date")).substring(0,7);
            if(!find(mon))
            {
                list.add(mon);
            }
        }
        db.close();
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,R.layout.list_month,list);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String itemDate=adapter.getItem(position);
                Intent intent=new Intent(monthActivity.this,MainActivity.class);
                intent.putExtra("date",itemDate);
                startActivity(intent);
            }
        });
    }
    public void addAccount(View view){//跳转
        Intent intent=new Intent(monthActivity.this,new_cost.class);
        //noinspection deprecation
        startActivityForResult(intent,1);
    }
    public boolean find(String a)
    {
        boolean flag=false;
        for (String str : list) {
            if(str.equals(a))
            {
                flag=true;
                break;
            }
        }
        return flag;
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode==1&&resultCode==1)
        {
            iniView();
        }
    }
}