Android开发之记账本开发第七天

用户寒山 發表於 2020-2-14 18:35:00

<h1>一、说在前面</h1>
<h2>今天是开发的第7天，今天没怎么添加新的东西，就是在原有的基础上改了一些小bug，比如增加完账目之后进行更改和删除闪退的问题，另外把自己的项目代码上传到了github，发现上传到GitHub好难诶。下载了git然后在网上学习了学习教程。下面附上学习的链接，非常详细。https://blog.csdn.net/xqhys/article/details/98113227</h2>
<h2> </h2>
<h1>二、全部源程序代码</h1>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_a8cd53c1-370c-47a7-b582-1a6d664c7c37" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_a8cd53c1-370c-47a7-b582-1a6d664c7c37" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_a8cd53c1-370c-47a7-b582-1a6d664c7c37" class="cnblogs_code_hide">
<pre>package com.example.daliy;

import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;

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

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;

import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AdapterView;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
private static final String TAG="MainActivity";
private List<CostBean> costBeanList;
private DatabaseHelper helper;
private String selectText="oo";
CostAdapter mAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 Toolbar toolbar = findViewById(R.id.toolbar);
 setSupportActionBar(toolbar);

 costBeanList=new ArrayList<>();
 helper=new DatabaseHelper(this);
 final ListView costList=findViewById(R.id.lv_main);
 initCostData();
 mAdapter = new CostAdapter(this, costBeanList);
 costList.setAdapter(mAdapter);
 costList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 @Override
 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 CostBean costBean=costBeanList.get(position);
 //CostBean bean= (CostBean) mAdapter.getItem(costBean.id);
 Intent intent=new Intent(MainActivity.this,Delete_UpdateActivity.class);
 intent.putExtra("id",costBean.id);
 startActivityForResult(intent,1);

 }
 });
 FloatingActionButton fab = findViewById(R.id.fab);
 fab.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,null);
 final EditText cost_title=viewDialog.findViewById(R.id.et_cost_title);
 final EditText cost_money=viewDialog.findViewById(R.id.et_cost_money);
 final DatePicker cost_date=viewDialog.findViewById(R.id.dp_cost_date);
 final Spinner cost_type=viewDialog.findViewById(R.id.sp_type);
 cost_type.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
 @Override
 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
 selectText=cost_type.getSelectedItem().toString();
 Log.d(TAG, "onItemSelected: +选择运行了");
 }

 @Override
 public void onNothingSelected(AdapterView<?> parent) {

 }
 });
 builder.setTitle("新账目");
 builder.setView(viewDialog);
 builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialog, int which) {
 if(TextUtils.isEmpty(cost_title.getText())){
 Toast.makeText(MainActivity.this,"备注为空",Toast.LENGTH_SHORT).show();
 return;
 }else if(TextUtils.isEmpty(cost_money.getText())){
 Toast.makeText(MainActivity.this,"金额为空",Toast.LENGTH_SHORT).show();
 return;
 }
 CostBean costBean=new CostBean();
 costBean.costType=selectText;
 Log.d(TAG, "onClick: "+selectText);
 costBean.costTitle=cost_title.getText().toString();
 costBean.costMoney=cost_money.getText().toString();
 costBean.costDate=cost_date.getYear()+"-"+(cost_date.getMonth()+1)+"-"+cost_date.getDayOfMonth();
 helper.insertCost(costBean);
 costBeanList.add(costBean);
 mAdapter.notifyDataSetChanged();
 }
 });
 builder.setNegativeButton("Cancel",null);
 builder.create().show();
 }
 });
}

protected void onActivityResult(int requestCode, int resultCode,Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 //此处可以根据两个Code进行判断，本页面和结果页面跳过来的值
 if (requestCode == 1 && resultCode == 2) {
 //String result = data.getStringExtra("result");
 costBeanList.clear();
 initCostData();
 mAdapter.notifyDataSetChanged();
 }
}

private void initCostData() {
// helper.deleteAllCost();
// for(int i=0;i<6;i++) {
//
// CostBean cb=new CostBean();
// cb.costDate="12-12";
// cb.costMoney="50";
// cb.costTitle=i+"heih";
// helper.insertCost(cb);
// }
 Cursor cursor = helper.getAllCost();
 if(cursor!=null){
 while (cursor.moveToNext()){
 CostBean costBean=new CostBean();
 costBean.id=cursor.getInt(cursor.getColumnIndex("id"));
 costBean.costType=cursor.getString(cursor.getColumnIndex("cost_type"));
 costBean.costTitle=cursor.getString(cursor.getColumnIndex("cost_title"));
 costBean.costDate=cursor.getString(cursor.getColumnIndex("cost_date"));
 costBean.costMoney=cursor.getString(cursor.getColumnIndex("cost_money"));
 costBeanList.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();

 //noinspection SimplifiableIfStatement
 if (id == R.id.action_chart) {

 Intent intent = new Intent(MainActivity.this,ChartActivity.class);
 intent.putExtra("cost_list", (Serializable) costBeanList);
 startActivity(intent);
 return true;
 }
 else if(id==R.id.delete_allData){
 helper.deleteAllCost();
 costBeanList.clear();
 mAdapter.notifyDataSetChanged();
 return true;
 }
 else if(id==R.id.query){
 Intent intent = new Intent(MainActivity.this,QueryActivity.class);
 startActivity(intent);
 }
 return super.onOptionsItemSelected(item);
}
}</pre>
</div>
MainActivity</div>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_8473c56b-18ce-48a1-b6cb-04359e20da7e" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_8473c56b-18ce-48a1-b6cb-04359e20da7e" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_8473c56b-18ce-48a1-b6cb-04359e20da7e" class="cnblogs_code_hide">
<pre>package com.example.daliy;

public class Constants {
public static final String TABLE_NAME="daily";
public static final int DATABASE_VERSION=1;
public static final String COST_TITLE = "cost_title";
public static final String COST_DATE = "cost_date";
public static final String COST_MONEY = "cost_money";
public static final String COST_TYPE = "cost_type";
}</pre>
</div>
Constants</div>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_55405ee1-491c-4235-ae81-fee0d9a5a716" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_55405ee1-491c-4235-ae81-fee0d9a5a716" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_55405ee1-491c-4235-ae81-fee0d9a5a716" class="cnblogs_code_hide">
<pre>package com.example.daliy;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class CostAdapter extends BaseAdapter {

String TAG="CostAdapter";
private List<CostBean> mlist;
private LayoutInflater minflater;
private Context mcontext;

public CostAdapter(Context context, List<CostBean> list) {
 mlist = list;
 mcontext = context;
 minflater = LayoutInflater.from(context);
}

@Override
public int getCount() {
 return mlist.size();
}

@Override
public Object getItem(int position) {
 Log.d(TAG, "getItem: "+mlist.get(position));
 return mlist.get(position);
}

@Override
public long getItemId(int position) {
 return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
 ViewHolder viewHolder;
 if (convertView == null) {
 viewHolder = new ViewHolder();
 convertView = minflater.inflate(R.layout.list_item, null);
 viewHolder.mTvcostTitle = convertView.findViewById(R.id.tv_costTitle);
 viewHolder.mTvcostMoney = convertView.findViewById(R.id.tv_costMoney);
 viewHolder.mTvcostDate = convertView.findViewById(R.id.tv_costDate);
 viewHolder.mTvcostType = convertView.findViewById(R.id.tv_costType);
 convertView.setTag(viewHolder);
 } else {
 viewHolder = (ViewHolder) convertView.getTag();
 }
 CostBean bean = mlist.get(position);
 viewHolder.mTvcostTitle.setText(bean.costTitle);
 viewHolder.mTvcostMoney.setText(bean.costMoney);
 viewHolder.mTvcostDate.setText(bean.costDate);
 viewHolder.mTvcostType.setText(bean.costType);

 return convertView;
}

private static class ViewHolder {
 public TextView mTvcostTitle;
 public TextView mTvcostDate;
 public TextView mTvcostMoney;
 public TextView mTvcostType;
}

}</pre>
</div>
CostAdapter</div>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_7b4c8191-0121-4e71-be29-435b15519b03" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_7b4c8191-0121-4e71-be29-435b15519b03" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_7b4c8191-0121-4e71-be29-435b15519b03" class="cnblogs_code_hide">
<pre>package com.example.daliy;

import java.io.Serializable;

public class CostBean implements Serializable {
public int id;
public String costTitle;
public String costDate;
public String costType;
public String costMoney;

}</pre>
</div>
CostBean</div>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_5327e578-3440-41aa-9039-887190d594a0" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_5327e578-3440-41aa-9039-887190d594a0" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_5327e578-3440-41aa-9039-887190d594a0" class="cnblogs_code_hide">
<pre>package com.example.daliy;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import androidx.annotation.Nullable;

public class DatabaseHelper extends SQLiteOpenHelper {

public DatabaseHelper(@Nullable Context context) {
 super(context, Constants.TABLE_NAME, null, Constants.DATABASE_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
 db.execSQL("create table if not exists daily("+
 "id integer primary key autoincrement,"+
 "cost_title varchar,"+
 "cost_date varchar,"+
 "cost_type varchar,"+
 "cost_money varchar)");
}

public void insertCost(CostBean costBean){
 SQLiteDatabase database=getWritableDatabase();
 ContentValues cv=new ContentValues();
 cv.put(Constants.COST_TITLE,costBean.costTitle);
 cv.put(Constants.COST_DATE,costBean.costDate);
 cv.put(Constants.COST_MONEY,costBean.costMoney);
 cv.put(Constants.COST_TYPE,costBean.costType);
 database.insert(Constants.TABLE_NAME,null,cv);
}

public void updateCost(CostBean costBean){
 SQLiteDatabase database=getWritableDatabase();

 ContentValues cv=new ContentValues();
 cv.put(Constants.COST_DATE,costBean.costDate);
 cv.put(Constants.COST_TYPE,costBean.costType);
 cv.put(Constants.COST_MONEY,costBean.costMoney);
 cv.put(Constants.COST_TITLE,costBean.costTitle);

 database.update(Constants.TABLE_NAME,cv,"id='"+costBean.id+"'",null);
}
public Cursor getAllCost(){

 SQLiteDatabase database=getWritableDatabase();
 return database.query(Constants.TABLE_NAME,null,null,null,null,null,"cost_date asc");
}

public Cursor getCost(String key){
 SQLiteDatabase database=getWritableDatabase();
 return database.query(Constants.TABLE_NAME,null,"cost_title like '%"+key+"%'",null,null,null," cost_date asc");
}

public Cursor getCostById(String key){
 SQLiteDatabase database=getWritableDatabase();
 return database.query(Constants.TABLE_NAME,null,"id= '"+key+"'",null,null,null,null);
}

public void deleteById(int id){
 SQLiteDatabase database=getWritableDatabase();
 database.delete(Constants.TABLE_NAME,"id= '"+id+"'",null);
}

public void deleteAllCost(){
 SQLiteDatabase database=getWritableDatabase();
 database.delete(Constants.TABLE_NAME,null,null);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}
}</pre>
</div>
DatabaseHelper</div>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_eaae488b-0e38-40b7-bccd-d3700b00a11a" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_eaae488b-0e38-40b7-bccd-d3700b00a11a" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_eaae488b-0e38-40b7-bccd-d3700b00a11a" class="cnblogs_code_hide">
<pre>package com.example.daliy;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.SpinnerAdapter;

import androidx.annotation.Nullable;

public class Delete_UpdateActivity extends Activity {
private int id;
private CostBean costBean;
DatabaseHelper helper;
EditText ed_title;
EditText ed_money;
DatePicker dp_date;
Button bt_delete;
Button bt_update;
Spinner sp_type;
String TAG="Delete_UpdateActivity";
String selectText;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_delete_or_update);
 helper=new DatabaseHelper(Delete_UpdateActivity.this);
 Intent intent=getIntent();
 id=intent.getIntExtra("id",id);
 costBean=new CostBean();
 Cursor cursor=helper.getCostById(String.valueOf(id));
 Log.d(TAG, "onCreate: "+id+"sss");
 if(cursor!=null){
 cursor.moveToNext();
 costBean.costType=cursor.getString(cursor.getColumnIndex("cost_type"));
 costBean.costTitle=cursor.getString(cursor.getColumnIndex("cost_title"));
 costBean.costDate=cursor.getString(cursor.getColumnIndex("cost_date"));
 costBean.costMoney=cursor.getString(cursor.getColumnIndex("cost_money"));
 }

 initData();
 initListener();
}

private void initData() {
 ed_title = findViewById(R.id.et_cost1_title);
 ed_money = findViewById(R.id.et_cost1_money);
 dp_date = findViewById(R.id.dp_cost1_date);
 sp_type = findViewById(R.id.sp_1type);
 bt_delete = findViewById(R.id.bt_delete);
 bt_update = findViewById(R.id.bt_update);
 ed_title.setText(costBean.costTitle);
 ed_money.setText(costBean.costMoney);
 SpinnerAdapter apsAdapter = sp_type.getAdapter();
 sp_type.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
 @Override
 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
 selectText=sp_type.getSelectedItem().toString();
 Log.d(TAG, "onItemSelected: +选择运行了");
 }

 @Override
 public void onNothingSelected(AdapterView<?> parent) {

 }
 });
 int size = apsAdapter.getCount();
 for (int i = 0; i < size; i++) {
 if (TextUtils.equals(costBean.costType, apsAdapter.getItem(i).toString())) {
 sp_type.setSelection(i,true);
 break;
 }
 }
}

private void initListener() {

 bt_delete.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 helper.deleteById(id);
 setResult(2);
 finish();
 }
 });
 bt_update.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 costBean=new CostBean();
 costBean.id=id;
 costBean.costDate= dp_date.getYear()+"-"+(dp_date.getMonth()+1)+"-"+dp_date.getDayOfMonth();
 costBean.costTitle=ed_title.getText().toString();
 costBean.costMoney=ed_money.getText().toString();
 costBean.costType=selectText;
 helper.updateCost(costBean);
 setResult(2);
 finish();
 }
 });
}
}</pre>
</div>
DeleteUpdateActivity</div>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_1c162c08-51cb-4b4a-b9e3-90b40ec9beda" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_1c162c08-51cb-4b4a-b9e3-90b40ec9beda" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_1c162c08-51cb-4b4a-b9e3-90b40ec9beda" class="cnblogs_code_hide">
<pre>package com.example.daliy;

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import androidx.annotation.Nullable;

import java.util.ArrayList;
import java.util.List;

public class QueryActivity extends Activity {
EditText queryKey;
Button doResearch;
DatabaseHelper helper;
ListView listView;
List<CostBean> list;
//private String queryKey;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_query_layout);
 listView=findViewById(R.id.lv_query);
 queryKey = findViewById(R.id.et_queryKey);
 doResearch = findViewById(R.id.bt_do_research);
 helper=new DatabaseHelper(this);
 list=new ArrayList<>();
 initListener();
}

private void initListener() {
 doResearch.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 if(TextUtils.isEmpty(queryKey.getText())){
 Toast.makeText(QueryActivity.this,"没有目标",Toast.LENGTH_SHORT).show();
 return;
 }

 Cursor cursor = helper.getCost(queryKey.getText().toString());
 if(cursor!=null){
 while (cursor.moveToNext()){
 CostBean costBean=new CostBean();
 costBean.costType=cursor.getString(cursor.getColumnIndex("cost_type"));
 costBean.costTitle=cursor.getString(cursor.getColumnIndex("cost_title"));
 costBean.costDate=cursor.getString(cursor.getColumnIndex("cost_date"));
 costBean.costMoney=cursor.getString(cursor.getColumnIndex("cost_money"));
 list.add(costBean);
 }
 cursor.close();
 }

 listView.setAdapter(new CostAdapter(QueryActivity.this,list));
 }
 });
}
}</pre>
</div>
QueryActivity</div>
<div class="cnblogs_code"><img src="https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" alt="" id="code_img_closed_84432614-bc4c-44e9-b49a-2dbf9868cc10" class="code_img_closed"><img src="https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif" alt="" id="code_img_opened_84432614-bc4c-44e9-b49a-2dbf9868cc10" class="code_img_opened" style="display: none">
<div id="cnblogs_code_open_84432614-bc4c-44e9-b49a-2dbf9868cc10" class="cnblogs_code_hide">
<pre>package com.example.daliy;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Spinner;
import android.widget.Toast;

import androidx.annotation.Nullable;

public class SpinnerAdapterActivity extends Activity {

private static final String TAG="SpinnerAdapterActivity";
public Spinner spinner;
public String selectText;
public SpinnerAdapterActivity(){
 spinner.findViewById(R.id.sp_type);
}

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
 @Override
 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
 selectText=parent.getItemAtPosition(position).toString();
 //Log.d(TAG, "onItemSelected: "+selectText);
 }

 @Override
 public void onNothingSelected(AdapterView<?> parent) {

 }
 });
}
}</pre>
</div>
SpinnerActivity</div>
<h1>三、心得体会</h1>
<h2>虽然博客里面写的开发时间是7天，但我认为自己好像放在这个账本上的实际开发时间非常非常少，其中有效时间比较少。不过这个寒假过得不像之前那样碌碌无为，跟这次的病毒我认为没有太大的关系，因为在这之前我也有自己学习，不过这样自己学习变得更加理所应当了。自己做出来的这个记账本我拿来和别人的比较下发现我做的好low，不过毕竟是自己第一个app也还有一些成就感，拿着自己的app给家长看的时候他们的反应也让我感觉自己的努力没有白费，还需要加油提高自己。</h2>
 
<h1>四、GitHub地址</h1>
  
来源：https://www.cnblogs.com/suanai/p/12308494.html

頁: [1]

琼殿技术论坛's Archiver

Android开发之记账本开发第七天