![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
package com.example.daliy;
import android.os.Bundle;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private List<CostBean> costBeanList;
@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<>();
ListView costList=findViewById(R.id.lv_main);
initCostData();
costList.setAdapter(new CostAdapter(this,costBeanList));
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
private void initCostData() {
for(int i=0;i<6;i++) {
CostBean cb=new CostBean();
cb.costDate="12-12";
cb.costMoney="50";
cb.costTitle="heih";
costBeanList.add(cb);
}
}
@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) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MainActivity
![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="80dp">
<TextView
android:layout_width="100dp"
android:layout_marginLeft="10dp"
android:layout_alignParentLeft="true"
android:text="CostTitlesdfsdf"
android:textSize="35sp"
android:gravity="center"
android:ellipsize="marquee"
android:singleLine="true"
android:id="@+id/tv_costTitle"
android:layout_height="80dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="80dp"
android:layout_toRightOf="@id/tv_costTitle"
android:textSize="30dp"
android:gravity="center"
android:id="@+id/tv_costDate"
android:layout_marginLeft="15dp"
android:text="costDate"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="80dp"
android:gravity="center"
android:textSize="30sp"
android:layout_marginRight="20dp"
android:layout_alignParentRight="true"
android:id="@+id/tv_costMoney"
android:text="30"/>
</RelativeLayout>
list_item
![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
package com.example.daliy;
import android.content.Context;
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 {
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) {
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);
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);
return convertView;
}
private static class ViewHolder {
public TextView mTvcostTitle;
public TextView mTvcostDate;
public TextView mTvcostMoney;
}
}
CostAdapter
![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
![Android开发之记账本开发第二天
一、说在前面
二、今天完成的源程序代码
三、效果
四、心得体会]()
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context=".MainActivity"
tools:showIn="@layout/activity_main">
<ListView
android:id="@+id/lv_main"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
content_main