安卓开发七——主管理页面

新增月份管理页面，将新增账本移植到这个页面

主页面视图

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center">

    <TextView
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="40sp"
        android:text="@string/month"
        />
    <View
        android:layout_width="fill_parent"
        android:layout_marginTop="10dp"
        android:layout_height="1dp"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:background="#aa000000" />
    <ListView
        android:id="@+id/l_month"
        android:layout_width="match_parent"
        android:layout_height="560dp" />
    <ImageButton
        android:id="@+id/add"
        android:onClick="addAccount"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:scaleType="centerInside"
        android:layout_centerHorizontal="true"
        android:background="#00FF0000"
        android:src="@drawable/img"
        android:layout_below="@+id/list_view" />
</LinearLayout>

列表视图的元件

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:id="@+id/month"
    android:layout_marginLeft="20dp"
    android:layout_alignParentLeft="true"
    android:gravity="center"
    android:singleLine="true"
    android:textSize="30sp"
    android:ellipsize="marquee"
    android:text="costTitle">

</TextView>

页面视图适配代码

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;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.month);
        Add=findViewById(R.id.add);
        listView=findViewById(R.id.l_month);
        iniView();
    }
    @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();
    }
    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();
        }
    }
}

这样我们基本所有的页面视图都完成了

主页面：

 账本页面

添加页面