[Android] Android开发-记账本-主要的dialog

package com.example.Utils.fragment;
import android.app.Dialog;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.*;
import android.widget.*;
import androidx.annotation.NonNull;
import com.example.Utils.R;
import com.example.Utils.adapter.CalendarAdapter;
import com.example.Utils.database.DBManager;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
public class CalendarDialog extends Dialog implements View.OnClickListener {
  ImageView errorIv;
  GridView gv;
  LinearLayout hsvLayout;
  List<TextView>hsvViewList;
  List<Integer>yearList;
  int selectPos = -1;   //表示正在被点击的年份的位置
  private CalendarAdapter adapter;
  int selectMonth = -1;
  public interface OnRefreshListener{
    public void onRefresh(int selPos,int year,int month);
  }
  OnRefreshListener onRefreshListener;
  public void setOnRefreshListener(OnRefreshListener onRefreshListener) {
    this.onRefreshListener = onRefreshListener;
  }
  public CalendarDialog(@NonNull Context context, int selectPos, int selectMonth) {
    super(context);
    this.selectPos = selectPos;
    this.selectMonth = selectMonth;
  }
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.dialog_calendar);
    gv = findViewById(R.id.dialog_calendar_gv);
    errorIv = findViewById(R.id.dialog_calendar_iv);
    hsvLayout = findViewById(R.id.dialog_calendar_layout);
    errorIv.setOnClickListener(this);
    // 向横向的ScrollView当中添加View的方法
    addViewToLayout();
    initGridView();
    //设置GridView当中每一个item的点击事件
    setGVListener();
  }
  private void setGVListener() {
    gv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        adapter.selPos = position;
        adapter.notifyDataSetInvalidated();
        int month = position + 1;
        int year = adapter.year;
        // 获取到被选中的年份和月份
        onRefreshListener.onRefresh(selectPos,year,month);
        cancel();
      }
    });
  }
  private void initGridView() {
    int selYear = yearList.get(selectPos);
    adapter = new CalendarAdapter(getContext(), selYear);
    if (selectMonth == -1) {
      int month = Calendar.getInstance().get(Calendar.MONTH);
      adapter.selPos = month;
    }else {
      adapter.selPos = selectMonth-1;
    }
    gv.setAdapter(adapter);
  }
  private void addViewToLayout() {
    hsvViewList = new ArrayList<>();   //将添加进入线性布局当中的TextView进行统一管理的集合
    yearList = DBManager.getYearListFromAccounttb(); //获取数据库当中存储了多少个年份
    //如果数据库当中没有记录，就添加今年的记录
    if (yearList.size() == 0) {
      int year = Calendar.getInstance().get(Calendar.YEAR);
      yearList.add(year);
    }
    //遍历年份，有几年，就向ScrollView当中添加几个view
    for (int i = 0; i < yearList.size(); i++) {
      int year = yearList.get(i);
      View view = getLayoutInflater().inflate(R.layout.item_dialogcal_hsv, null);
      hsvLayout.addView(view);   //将view添加到布局当中
      TextView hsvTv = view.findViewById(R.id.item_dialogcal_hsv_tv);
      hsvTv.setText(year+"");
      hsvViewList.add(hsvTv);
    }
    if (selectPos == -1) {
      selectPos = hsvViewList.size()-1;   //设置当前被选中的是最近的年份
    }
    changeTvbg(selectPos);  //将最后一个设置为选中状态
    setHSVClickListener();  //设置每一个View的监听事件
  }
  /** 给横向的ScrollView当中每一个TextView设置点击事件*/
  private void setHSVClickListener() {
    for (int i = 0; i < hsvViewList.size(); i++) {
      TextView view = hsvViewList.get(i);
      final int pos = i;
      view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          changeTvbg(pos);
          selectPos = pos;
          // 获取被选中的年份，然后下面的GridView显示数据源会发生变化
          int year = yearList.get(selectPos);
          adapter.setYear(year);
        }
      });
    }
  }
  /** 传入被选中的位置，改变此位置上的背景和文字颜色*/
  private void changeTvbg(int selectPos) {
    for (int i = 0; i < hsvViewList.size(); i++) {
      TextView tv = hsvViewList.get(i);
      tv.setBackgroundResource(R.drawable.dialog_btn_bg);
      tv.setTextColor(Color.BLACK);
    }
    TextView selView = hsvViewList.get(selectPos);
    selView.setBackgroundResource(R.drawable.main_recordbtn_bg);
    selView.setTextColor(Color.WHITE);
  }
  @Override
  public void onClick(View v) {
    switch (v.getId()) {
      case R.id.dialog_calendar_iv:
        cancel();
        break;
    }
  }
  /* 设置Dialog的尺寸和屏幕尺寸一致*/
  public void setDialogSize(){
//    获取当前窗口对象
    Window window = getWindow();
//    获取窗口对象的参数
    WindowManager.LayoutParams wlp = window.getAttributes();
//    获取屏幕宽度
    Display d = window.getWindowManager().getDefaultDisplay();
    wlp.width = (int)(d.getWidth());  //对话框窗口为屏幕窗口
    wlp.gravity = Gravity.TOP;
    window.setBackgroundDrawableResource(android.R.color.transparent);
    window.setAttributes(wlp);
  }
}