Android中ListView使用示例介紹
更新時(shí)間：2022年01月02日 11:05:15 作者：吃橘子的季節(jié)呢
大家好，本篇文章主要講的是Android中ListView使用示例介紹，感興趣的同學(xué)趕快來看一看吧，對你有幫助的話記得收藏一下，方便下次瀏覽
簡單ListView實(shí)例
數(shù)據(jù)庫讀取數(shù)據(jù)存入ListView
一、具體思路
1、創(chuàng)建Listview控件
2、創(chuàng)建子布局
創(chuàng)建數(shù)據(jù)庫
主方法調(diào)用數(shù)據(jù)庫繼承類且初始化數(shù)據(jù)庫，寫入數(shù)據(jù)
? MyDatabaseHelper databaseHelper = new MyDatabaseHelper(this,"Co.db",null,1); ?
SQLiteDatabase db = databaseHelper.getWritableDatabase(); ?
SQLiteDatabase db2 = databaseHelper.getReadableDatabase();
3、寫入
ContentValues values = new ContentValues();
values.put("Code","1");
values.put("Name","Admin");
values.put("Post","32");
values.put("Tel","123456789");
db.insert("employee",null,values);
values.clear();
values.put("Code","2");
values.put("Name","Admin1");
values.put("Post","22");
values.put("Tel","23342e");
db.insert("employee",null,values);
4、讀取
Cursor cursor = db2.query("Employee",null,null,null,null,null,null);
arrayList = new ArrayList<>();
if (cursor.moveToFirst()) {
do {
name = cursor.getString(cursor.getColumnIndex("Name"));
code = cursor.getString(cursor.getColumnIndex("Code"));
post = cursor.getString(cursor.getColumnIndex("Post"));
tel = cursor.getString(cursor.getColumnIndex("Tel"));
System.out.println("查找到的值:"+ name +"---"+ code +"---"+ post +"---"+ tel);
Employee employee=new Employee(name, tel, post, code);
arrayList.add(employee);
}while (cursor.moveToNext());
}
5、創(chuàng)建對象，構(gòu)造器，GETSET方法
6、創(chuàng)建Adapter
二、具體實(shí)施
1、適配器
lv.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if (convertView==null){
view=View.inflate(getBaseContext(),R.layout.listitem,null);
}else{
view=convertView;
}
Employee ee=(Employee) arrayList.get(position);
TextView eename=view.findViewById(R.id.name);
TextView eedianhua=view.findViewById(R.id.dianhua);
TextView eezhiwei=view.findViewById(R.id.zhiwei);
TextView eekahao=view.findViewById(R.id.kahao);
eename.setText(ee.getName());
eedianhua.setText(ee.getTel());
eezhiwei.setText(ee.getPost());
eekahao.setText(ee.getCode());
return view;
}
});
2、數(shù)據(jù)庫
public class MyDatabaseHelper extends SQLiteOpenHelper {
public static final String CREATE_Employees = "create table employee ("
+ "Code text, "
+ "Name text unique, "
+ "Post text, "
+ "Tel text)";
private Context mContext;
public MyDatabaseHelper(Context context, String name, SQLiteDatabase.CursorFactory
factory, int version) {
super(context, name, factory, version);
mContext = context;
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_Employees);
Toast.makeText(mContext, "Create succeeded", Toast.LENGTH_SHORT).show();
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
3、對象
package com.example.a4_7_1_lv;
public class Employee {
private String name;
private String tel;
private String post;
private String code;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
public String getPost() {
return post;
}
public void setPost(String post) {
this.post = post;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public Employee(String name, String tel, String post, String code) {
this.name = name;
this.tel = tel;
this.post = post;
this.code = code;
}
public Employee() {
}
}
4、等等等等
三、案例分享
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context=".MainActivity">
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
listitem.xml
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="姓名"
android:textSize="30dp"/>
<TextView
android:layout_marginLeft="30dp"
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="30dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="電話"
android:layout_marginLeft="100dp"
android:textSize="30dp"/>
<TextView
android:layout_marginLeft="30dp"
android:id="@+id/dianhua"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="30dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="職位"
android:textSize="30dp"/>
<TextView
android:layout_marginLeft="30dp"
android:id="@+id/zhiwei"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="30dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="卡號"
android:layout_marginLeft="100dp"
android:textSize="30dp"/>
<TextView
android:layout_marginLeft="30dp"
android:id="@+id/kahao"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="30dp"/>
</LinearLayout>
</LinearLayout>
MyDatabaseHelper.java
package com.example.a4_7_1_lv;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.widget.Toast;
public class MyDatabaseHelper extends SQLiteOpenHelper {
public static final String CREATE_Employees = "create table employee ("
+ "Code text, "
+ "Name text unique, "
+ "Post text, "
+ "Tel text)";
private Context mContext;
public MyDatabaseHelper(Context context, String name, SQLiteDatabase.CursorFactory
factory, int version) {
super(context, name, factory, version);
mContext = context;
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_Employees);
Toast.makeText(mContext, "Create succeeded", Toast.LENGTH_SHORT).show();
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
MainActivity.java
package com.example.a4_7_1_lv;
import androidx.appcompat.app.AppCompatActivity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ListView lv;
private MyDatabaseHelper databaseHelper;
private SQLiteDatabase db;
private SQLiteDatabase db2;
private ArrayList arrayList;
private String name;
private String code;
private String post;
private String tel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = findViewById(R.id.list);
}
@Override
protected void onStart() {
super.onStart();
MyDatabaseHelper databaseHelper = new MyDatabaseHelper(this,"Co.db",null,1);
db = databaseHelper.getWritableDatabase();
db2 = databaseHelper.getReadableDatabase();
DBInsert();
Cursor cursor = db2.query("Employee",null,null,null,null,null,null);
arrayList = new ArrayList<>();
if (cursor.moveToFirst()) {
do {
name = cursor.getString(cursor.getColumnIndex("Name"));
code = cursor.getString(cursor.getColumnIndex("Code"));
post = cursor.getString(cursor.getColumnIndex("Post"));
tel = cursor.getString(cursor.getColumnIndex("Tel"));
System.out.println("查找到的值:"+ name +"---"+ code +"---"+ post +"---"+ tel);
Employee employee=new Employee(name, tel, post, code);
arrayList.add(employee);
}while (cursor.moveToNext());
}
lv.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if (convertView==null){
view=View.inflate(getBaseContext(),R.layout.listitem,null);
}else{
view=convertView;
}
Employee ee=(Employee) arrayList.get(position);
TextView eename=view.findViewById(R.id.name);
TextView eedianhua=view.findViewById(R.id.dianhua);
TextView eezhiwei=view.findViewById(R.id.zhiwei);
TextView eekahao=view.findViewById(R.id.kahao);
eename.setText(ee.getName());
eedianhua.setText(ee.getTel());
eezhiwei.setText(ee.getPost());
eekahao.setText(ee.getCode());
return view;
}
});
}
private void DBInsert() {
ContentValues values = new ContentValues();
values.put("Code","1");
values.put("Name","Admin");
values.put("Post","32");
values.put("Tel","123456789");
db.insert("employee",null,values);
values.clear();
values.put("Code","2");
values.put("Name","Admin1");
values.put("Post","22");
values.put("Tel","23342e");
db.insert("employee",null,values);
values.clear();
values.put("Code","4");
values.put("Name","Admin13");
values.put("Post","2sda2");
values.put("Tel","233asd42e");
db.insert("employee",null,values);
values.clear();
values.put("Code","Code");
values.put("Name","Name");
values.put("Post","Post");
values.put("Tel","Tel");
db.insert("employee",null,values);
}
}
Employee.java
package com.example.a4_7_1_lv;
import androidx.appcompat.app.AppCompatActivity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ListView lv;
private MyDatabaseHelper databaseHelper;
private SQLiteDatabase db;
private SQLiteDatabase db2;
private ArrayList arrayList;
private String name;
private String code;
private String post;
private String tel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = findViewById(R.id.list);
}
@Override
protected void onStart() {
super.onStart();
MyDatabaseHelper databaseHelper = new MyDatabaseHelper(this,"Co.db",null,1);
db = databaseHelper.getWritableDatabase();
db2 = databaseHelper.getReadableDatabase();
DBInsert();
Cursor cursor = db2.query("Employee",null,null,null,null,null,null);
arrayList = new ArrayList<>();
if (cursor.moveToFirst()) {
do {
name = cursor.getString(cursor.getColumnIndex("Name"));
code = cursor.getString(cursor.getColumnIndex("Code"));
post = cursor.getString(cursor.getColumnIndex("Post"));
tel = cursor.getString(cursor.getColumnIndex("Tel"));
System.out.println("查找到的值:"+ name +"---"+ code +"---"+ post +"---"+ tel);
Employee employee=new Employee(name, tel, post, code);
arrayList.add(employee);
}while (cursor.moveToNext());
}
lv.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if (convertView==null){
view=View.inflate(getBaseContext(),R.layout.listitem,null);
}else{
view=convertView;
}
Employee ee=(Employee) arrayList.get(position);
TextView eename=view.findViewById(R.id.name);
TextView eedianhua=view.findViewById(R.id.dianhua);
TextView eezhiwei=view.findViewById(R.id.zhiwei);
TextView eekahao=view.findViewById(R.id.kahao);
eename.setText(ee.getName());
eedianhua.setText(ee.getTel());
eezhiwei.setText(ee.getPost());
eekahao.setText(ee.getCode());
return view;
}
});
}
private void DBInsert() {
ContentValues values = new ContentValues();
values.put("Code","1");
values.put("Name","Admin");
values.put("Post","32");
values.put("Tel","123456789");
db.insert("employee",null,values);
values.clear();
values.put("Code","2");
values.put("Name","Admin1");
values.put("Post","22");
values.put("Tel","23342e");
db.insert("employee",null,values);
values.clear();
values.put("Code","4");
values.put("Name","Admin13");
values.put("Post","2sda2");
values.put("Tel","233asd42e");
db.insert("employee",null,values);
values.clear();
values.put("Code","Code");
values.put("Name","Name");
values.put("Post","Post");
values.put("Tel","Tel");
db.insert("employee",null,values);
}
}
到此這篇關(guān)于Android中ListView使用示例介紹的文章就介紹到這了,更多相關(guān)Android ListView使用內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
相關(guān)文章
Android實(shí)現(xiàn)濾鏡效果ColorMatrix
這篇文章主要為大家詳細(xì)介紹了Android實(shí)現(xiàn)濾鏡效果ColorMatrix，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下2021-05-05
這篇文章主要為大家詳細(xì)介紹了Android實(shí)現(xiàn)圓形圖片的兩種方式,具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下2016-11-11
這篇文章主要介紹了性能分析工具Systrace的使用及說明，具有很好的參考價(jià)值，希望對大家有所幫助。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教2023-03-03
Android編程圖片加載類ImageLoader定義與用法實(shí)例分析
這篇文章主要介紹了Android編程圖片加載類ImageLoader定義與用法,結(jié)合實(shí)例形式分析了Android圖片加載類ImageLoader的功能、定義、使用方法及相關(guān)操作注意事項(xiàng),代碼中備有較為詳盡的注釋便于理解,需要的朋友可以參考下2017-12-12
Flutter仿微信通訊錄實(shí)現(xiàn)自定義導(dǎo)航條的示例代碼
某些頁面比如我們在選擇聯(lián)系人或者某個(gè)城市的時(shí)候需要快速定位到我們需要的選項(xiàng)，一般都會(huì)需要像微信通訊錄右邊有一個(gè)導(dǎo)航條一樣的功能，本文將利用Flutter實(shí)現(xiàn)這一效果，需要的可以參考一下2022-04-04
Android AndBase框架使用封裝好的函數(shù)完成Http請求（三）
這篇文章主要介紹了Android AndBase框架使用封裝好的函數(shù)完成Http請求的相關(guān)資料，感興趣的小伙伴們可以參考一下2016-03-03
這篇文章主要為大家詳細(xì)介紹了Android百度地圖應(yīng)用之圖層展示，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下2016-06-06
Android 列表倒計(jì)時(shí)的實(shí)現(xiàn)的示例代碼（CountDownTimer）
本篇文章主要介紹了Android 列表倒計(jì)時(shí)的實(shí)現(xiàn)的示例代碼（CountDownTimer），具有一定的參考價(jià)值，有興趣的可以了解一下2017-09-09
Android Data Binding數(shù)據(jù)綁定詳解
本文主要介紹Android Data Binding數(shù)據(jù)綁定的知識(shí)，這里整理了詳細(xì)的資料及簡單示例代碼幫助大家學(xué)習(xí)理解此部分知識(shí)，有需要的小伙伴可以參考下2016-09-09
Android調(diào)試出現(xiàn)The selected device is incompatible問題解決
這篇文章主要介紹了Android調(diào)試出現(xiàn)The selected device is incompatible問題解決的相關(guān)資料,需要的朋友可以參考下2017-01-01