11.11
作者：互联网
购物车程序
<?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:padding="16dp" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="商品名称 ："
android:textSize="18sp" />
<EditText
android:id="@+id/et_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入商品名称"
android:textSize="16sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="价格："
android:textSize="18sp" />
<EditText
android:id="@+id/et_price"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="输入价格"
android:textSize="16sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="数量："
android:textSize="18sp" />
<EditText
android:id="@+id/et_num"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="输入数量"
android:textSize="16sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="@+id/btn_add"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight="1"
android:background="#B9B9FF"
android:onClick="add"
android:text="添加"
android:textSize="18sp" />
<Button
android:id="@+id/btn_query"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight="1"
android:background="#DCB5FF"
android:onClick="search"
android:text="查询"
android:textSize="18sp" />
<Button
android:id="@+id/btn_update"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight="1"
android:background="#E6CAFF"
android:onClick="update"
android:text="修改"
android:textSize="18sp" />
<Button
android:id="@+id/btn_delete"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#ACD6FF"
android:onClick="delete"
android:text="删除"
android:textSize="18sp" />
</LinearLayout>
<ListView
android:id="@+id/tv_show"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="25dp"
android:textSize="20sp"
/>
</LinearLayout>
<?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="wrap_content"
android:orientation="horizontal"
android:padding="10dp">
<ImageView
android:layout_width="100dp"
android:layout_height="120dp"
android:src="@drawable/ic_launcher_background"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/tv_id"
android:layout_marginLeft="20dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"/>
<TextView
android:id="@+id/tv_name"
android:layout_marginLeft="20dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"/>
<TextView
android:id="@+id/tv_price"
android:layout_marginLeft="20dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="3dp"
android:textSize="20sp"/>
<TextView
android:id="@+id/tv_num"
android:layout_marginLeft="20dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="3dp"
android:textSize="20sp"/>
</LinearLayout>
</LinearLayout>
package com.example.myapplication;
import android.os.Bundle;
import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends Activity {
List<Shopping> list = new ArrayList<Shopping>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void add(View v) {
StuOpenHelper helper = new StuOpenHelper(this);
SQLiteDatabase db = helper.getWritableDatabase();
String name = ((EditText) findViewById(R.id.et_name)).getText()
.toString();
int price = Integer.parseInt(((EditText) findViewById(R.id.et_price))
.getText().toString());
int num = Integer.parseInt(((EditText) findViewById(R.id.et_num))
.getText().toString());
// 原生sql操作,
// db.execSQL("insert into stuinfo (name,age) values('lisi',22)");
// db.execSQL("insert into stuinfo (name,age) values(?,?)",new
// Object[]{"kitty",30});
db.execSQL("insert into shoppinfo (name,price,num) values(?,?,?)", new Object[] {
name, price,num });
Toast.makeText(this, "ok", 0).show();
}
public void delete(View view) {
StuOpenHelper helper = new StuOpenHelper(this);
SQLiteDatabase db = helper.getWritableDatabase();
String name = ((EditText) findViewById(R.id.et_name)).getText()
.toString();
db.execSQL("delete from shoppinfo where name=?", new Object[] { name });
Toast.makeText(this, "删除成功", 0).show();
}
public void update(View view) {
StuOpenHelper helper = new StuOpenHelper(this);
SQLiteDatabase db = helper.getWritableDatabase();
String name = ((EditText) findViewById(R.id.et_name)).getText()
.toString();
int price = Integer.parseInt(((EditText) findViewById(R.id.et_price))
.getText().toString());
int num = Integer.parseInt(((EditText) findViewById(R.id.et_num))
.getText().toString());
db.execSQL("update shoppinfo set price=?,num=? where name=?", new Object[] {
price,num,name });
Toast.makeText(this, "修改成功", 0).show();
}
public void search(View view) {
StuOpenHelper helper = new StuOpenHelper(this);
SQLiteDatabase db = helper.getWritableDatabase();
// String s = "";
Cursor cursor = db.rawQuery("select * from shoppinfo", null);
if (cursor.getCount() != 0) {
while (cursor.moveToNext()) {
list.add(new Shopping(cursor.getInt(0),cursor.getString(1),cursor.getInt(2),cursor.getInt(3)));
}
}
// Toast.makeText(this, s, 0).show();
// ((TextView) (findViewById(R.id.tv_show))).setText(s);
ListView li = (ListView) findViewById(R.id.tv_show);
li.setAdapter(new shopAdapter());
}
class shopAdapter extends BaseAdapter{
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int position, View converView, ViewGroup parent) {
View view = View.inflate(MainActivity.this,R.layout.list_item,null);
TextView id = (TextView) view.findViewById(R.id.tv_id);
TextView name = (TextView) view.findViewById(R.id.tv_name);
TextView price = (TextView) view.findViewById(R.id.tv_price);
TextView num = (TextView) view.findViewById(R.id.tv_num);
id.setText(list.get(position).getId()+" ");
name.setText(list.get(position).getName()+" ");
price.setText(list.get(position).getPrice()+" ");
num.setText(list.get(position).getNum()+" ");
return view;
}
}
}
package com.example.myapplication;
public class Shopping {
private int id;
private String name;
private int price;
private int num;
public Shopping(){
}
public Shopping(int id,String name,int price,int num){
this.id=id;
this.name=name;
this.price=price;
this.num=num;
}
public void setId(int id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setPrice(int price) {
this.price = price;
}
public void setNum(int num) {
this.num = num;
}
public int getNum() {
return num;
}
public String getName() {
return name;
}
public int getPrice() {
return price;
}
public int getId() {
return id;
}
}
package com.example.myapplication;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
public class StuOpenHelper extends SQLiteOpenHelper {
public StuOpenHelper(Context context) {
super(context, "shop.db", null, 1);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("create table shoppinfo(_id integer primary key autoincrement,name varchar(20),price integer,num integer)");
}
@Override
public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
// TODO Auto-generated method stub
}
}
用内容提供者读取信息
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="查询"
android:onClick="click"/>
</RelativeLayout>
package com.example.vbn;
import java.io.File;
import java.io.FileOutputStream;
import org.xmlpull.v1.XmlSerializer;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.database.Cursor;
import android.util.Xml;
import android.view.Menu;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void click(View v) {
// 1.获取XmlSerializer的实例
XmlSerializer serializer = Xml.newSerializer();
// 2.设置序列化参数
String pathString = Environment.getExternalStorageDirectory()
.getPath();
File file = new File(pathString, "smsbackup.xml");
try {
FileOutputStream fos = new FileOutputStream(file);
serializer.setOutput(fos, "utf-8");
// 3.写xml文档开头
serializer.startDocument("utf-8", true);
// 4.写xml根节点
serializer.startTag(null, "smss");
// 5.构造uri
Uri uri = Uri.parse("content://sms/");
// 6.通过内容解析者查询
Cursor cursor = getContentResolver().query(uri,
new String[] { "address", "date", "body" }, null, null,
null);
if (cursor != null && cursor.getCount() > 0) {
while (cursor.moveToNext()) {
String addressString = cursor.getString(0);
String dateString = cursor.getString(1);
String bodyString = cursor.getString(2);
//7.写入sms节点
serializer.startTag(null, "sms");
//8.写入address节点
serializer.startTag(null, "address");
serializer.text(addressString);
serializer.endTag(null, "address");
//9.写入date节点
serializer.startTag(null, "date");
serializer.text(dateString);
serializer.endTag(null, "date");
//10.写入body节点
serializer.startTag(null, "body");
serializer.text(bodyString);
serializer.endTag(null, "body");
serializer.endTag(null, "sms");
}
}
serializer.endTag(null, "smss");
serializer.endDocument();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
标签：name,int,public,import,android,11.11,id 来源： https://www.cnblogs.com/M1223631418/p/13967129.html