Android实验一实验报告Word下载.docx

Android实验一实验报告Word下载.docx

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android="

schemas.android./apk/res/android"

android:

layout_width="

match_parent"

layout_height="

orientation="

vertical"

LinearLayout

0dp"

layout_weight="

1"

TextView

wrap_content"

text="

物品清单"

/>

horizontal"

物品名称"

EditText

id="

+id/id_et_stuffname"

inputType="

text"

/LinearLayout>

物品个数"

+id/id_et_stuffamount"

物品价格"

+id/id_et_stuffprize"

FrameLayout

Button

+id/id_bt_add"

添加记录"

layout_marginLeft="

10dp"

layout_marginRight="

layout_marginTop="

6dp"

layout_marginBottom="

7dp"

gravity="

center"

padding="

5dp"

textColor="

#727272"

background="

drawable/recordbutton"

minHeight="

+id/id_bt_all"

显示全部"

View

1dp"

#eee"

/FrameLayout>

2.创建ListViewItem布局

#ffffffff"

ImageView

+id/id_ig_name"

src="

drawable/ic_menu_paste_holo_light"

+id/id_tv_name"

#000000"

textSize="

18sp"

+id/id_tv_amount"

+id/id_tv_price"

ImageButton

+id/id_ib_delete"

drawable/ic_menu_delete"

onClick="

deleteItem"

3.创建数据库

package.LIQI.Stuff;

importandroid.content.Context;

importandroid.database.sqlite.SQLiteDatabase;

importandroid.database.sqlite.SQLiteDatabase.CursorFactory;

importandroid.database.sqlite.SQLiteOpenHelper;

publicclassMySQLiteOpenHelperextendsSQLiteOpenHelper{

publicMySQLiteOpenHelper（Contextcontext

）{

super（context,"

LIQI.db"

null,1）;

//TODOAuto-generatedconstructorstub

}

Override

publicvoidonCreate（SQLiteDatabasedb）{

db.execSQL（"

createtableLIQI（_idintegerprimarykeyautoincrement,stuff,amount,price）"

）;

publicvoidonUpgrade（SQLiteDatabasedb,intoldVersion,intnewVersion）{

//TODOAuto-generatedmethodstub

}

4.创建account类

package.LIQI.Stuff;

publicclassStuff{

privateStringstuffName;

privateintStuffAmount;

privatefloatStuffPrice;

publicStringgetStuffName（）{

returnstuffName;

publicvoidsetStuffName（StringstuffName）{

this.stuffName=stuffName;

publicintgetStuffAmount（）{

returnStuffAmount;

publicvoidsetStuffAmount（intstuffAmount）{

StuffAmount=stuffAmount;

publicfloatgetStuffPrice（）{

returnStuffPrice;

publicvoidsetStuffPrice（floatstuffPrice）{

StuffPrice=stuffPrice;

5.创建数据操作逻辑

importjava.util.ArrayList;

importjava.util.List;

importandroid.app.Activity;

importandroid.database.Cursor;

importandroid.os.Bundle;

importandroid.view.View;

importandroid.view.View.OnClickListener;

importandroid.view.ViewGroup;

importandroid.widget.BaseAdapter;

importandroid.widget.ImageButton;

importandroid.widget.ImageView;

importandroid.widget.ListView;

importandroid.widget.TextView;

importandroid.widget.Toast;

publicclassStuffListextendsActivity{

privateListViewlv;

privateSQLiteDatabasemDataBase;

privateList<

Stuff>

stuffInfos;

privateMySQLiteOpenHelpermHelper;

protectedvoidonCreate（BundlesavedInstanceState）{

setContentView（R.layout.show_all）;

mHelper=newMySQLiteOpenHelper（this）;

lv=（ListView）findViewById（R.id.id_lv）;

all（）;

super.onCreate（savedInstanceState）;

publicvoidall（）{

mDataBase=mHelper.getWritableDatabase（）;

Cursorcursor=mDataBase.query（"

LIQI"

null,null,null,null,null,null）;

stuffInfos=newArrayList<

（）;

while（cursor.moveToNext（））{

Stuffstuff=newStuff（）;

stuff.setStuffName（cursor.getString

（1））;

stuff.setStuffAmount（cursor.getInt

（2））;

stuff.setStuffPrice（cursor.getFloat（3））;

stuffInfos.add（stuff）;

}

cursor.close（）;

mDataBase.close（）;

lv.setAdapter（newMyadapter（））;

classMyadapterextendsBaseAdapter{

Override

publicintgetCount（）{

returnstuffInfos.size（）;

}

publicObjectgetItem（intposition）{

//TODOAuto-generatedmethodstub

returnnull;

publiclonggetItemId（intposition）{

return0;

publicViewgetView（finalintposition,Viewview,ViewGroupparent）{

view=View.inflate（StuffList.this,R.layout.stuff_item,null）;

TextViewtv_name=（TextView）view.findViewById（R.id.id_tv_name）;

TextViewtv_amount=（TextView）view.findViewById（R.id.id_tv_amount）;

TextViewtv_price=（TextView）view.findViewById（R.id.id_tv_price）;

ImageButtoniButton=（ImageButton）view.findViewById（R.id.id_ib_delete）;

tv_name.setText（stuffInfos.get（position）.getStuffName（））;

tv_amount.setText（"

数量（个）"

+stuffInfos.get（position）.getStuffAmount（））;

tv_price.setText（"

单价（元）"

+stuffInfos.get（position）.getStuffPrice（））;

iButton.setOnClickListener（newOnClickListener（）{

Override

publicvoidonClick（Viewv）{

mDataBase=mHelper.getWritableDatabase（）;

mDataBase.delete（"

"

stuff=?

"

newString[]{stuffInfos.get（position）.getStuffName（）}）;

mDataBase.close（）;

stuffInfos.remove（position）;

Myadapter.this.notifyDataSetChanged（）;

}

}）;

returnview;

6.编写界面交互代码

importandroid.content.ContentValues;

importandroid.content.Intent;

importandroid.widget.Button;

importandroid.widget.EditText;

publicclassMainActivityextendsActivityimplementsOnClickListener{

privateButtonbt_add,bt_all;

privateEditTextet_stuffName,et_stuffAmount,et_stuffPrice;

protectedvoidonCreate（BundlesavedInstanceState）{

super.onCreate（savedInstanceState）;

setContentView（R.layout.add_data）;

mHelper=newMySQLiteOpenHelper（this）;

initView（）;

initAction（）;

publicvoidinitView（）{

et_stuffName=（EditText）findViewById（R.id.id_et_stuffname）;

et_stuffAmount=（EditText）findViewById（R.id.id_et_stuffamount）;

et_stuffPrice=（EditText）findViewById（R.id.id_et_stuffprize）;

bt_add=（Button）findViewById（R.id.id_bt_add）;

bt_all=（Button）findViewById（R.id.id_bt_all）;

publicvoidinitAction（）{

bt_add.setOnClickListener（this）;

bt_all.setOnClickListener（this）;

publicvoidonClick（Viewv）{

switch（v.getId（））{

caseR.id.id_bt_add:

add（）;

break;

caseR.id.id_bt_all:

Intentintent=newIntent（this,StuffList.class）;

startActivity（intent）;

publicvoida