实验报告
|
课程名称 |
基于Android平台移动互联网开发 |
实验日期 |
2016年5月6日 |
||||||||||||||||||||||||||||||||
|
实验项目名称 |
SQLite数据库操作 |
实验地点 |
S3010 |
||||||||||||||||||||||||||||||||
|
实验类型 |
□验证型 √设计型 □综合型 |
学 时 |
4 |
||||||||||||||||||||||||||||||||
|
一、实验目的及要求（本实验所涉及并要求掌握的知识点） |
|||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||
|
二、实验环境（本实验所使用的硬件设备和相关软件） |
|||||||||||||||||||||||||||||||||||
|
(1)PC机 (2)操作系统：Windows XP (3)软件： Eclipse, JDK1.6，Android SDK，ADT |
|||||||||||||||||||||||||||||||||||
|
三、实验内容及步骤 |
|||||||||||||||||||||||||||||||||||
|
（1） 确定数据库的数据结构。 （2） 新建工程，修改布局文件，定义字符串资源。 （3） 开发布局文件activity_main.xml用于显示联系人列表。 （4） layout目录下新建一个detail.xml,用于显示联系人详细信息。 （5） 开发数据库辅助类MyOpenHelper类 （6） DetailActivity端开发实现数据库增加、删除、修改记录等操作 （7） 新建Activity名为DetailActivity.java，实现联系人详细信息显示功能。 |
|||||||||||||||||||||||||||||||||||
|
四、实验结果（本实验源程序清单及运行结果或实验结论、实验设计图） |
|||||||||||||||||||||||||||||||||||
|
代码： MyOpenHelper
public class MyOpenHelper extends SQLiteOpenHelper{
public static final String CREAT_CONTACTS="create table contactTable(id integer primary key autoincrement,name,email,comp,post,addr,phone,mobile)";
// +"id integer primary key autoincrement,"
// +"name,pwd");
private Context mycContext;
public MyOpenHelper(Context context, String name, CursorFactory factory,
int version) {
super(context, name, factory, version);
// TODO Auto-generated constructor stub
mycContext=context;
}
@Override
public void onCreate(SQLiteDatabase arg0) {
// TODO Auto-generated method stub
arg0.execSQL(CREAT_CONTACTS);
Toast.makeText(mycContext, "数据库创建成功", Toast.LENGTH_LONG).show();
}
@Override
public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
// TODO Auto-generated method stub
}
public Cursor query(String string, String[] args) {
// TODO Auto-generated method stub
SQLiteDatabase db=this.getReadableDatabase();
Cursor cursor=db.rawQuery(string, args);
return cursor;
}
}
DetailActivity
public class DetailActivity extends Activity {
MyOpenHelper dbhelper;
EditText editname;
EditText editemail;
EditText editcomp;
EditText editpost;
EditText editaddr;
EditText editphone;
Bundle bundle;
EditText editmobile;
ImageButton imbutsave;
private String selectname;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.detail);
editname=(EditText)findViewById(R.id.editname);
editemail=(EditText)findViewById(R.id.editemail);
editcomp=(EditText)findViewById(R.id.editcomp);
editpost=(EditText)findViewById(R.id.editpost);
editaddr=(EditText)findViewById(R.id.editaddr);
editphone=(EditText)findViewById(R.id.editphone);
editmobile=(EditText)findViewById(R.id.editmobile);
imbutsave=(ImageButton)findViewById(R.id.imageButtonsave);
bundle=getIntent().getExtras();
dbhelper=new MyOpenHelper(DetailActivity.this, "mycontacts.db",null,1);
final SQLiteDatabase db=dbhelper.getReadableDatabase();
if(!bundle.getString("name").equals(""))
{
selectname=bundle.getString("name");
Cursor cursor = db.rawQuery(
"select * from contactTable where name=?",new String[]{selectname});
cursor.moveToFirst();
editname.setText(cursor.getString(cursor.getColumnIndex("name")));
editemail.setText(cursor.getString(cursor.getColumnIndex("email")));
editcomp.setText(cursor.getString(cursor.getColumnIndex("comp")));
editpost.setText(cursor.getString(cursor.getColumnIndex("post")));
editaddr.setText(cursor.getString(cursor.getColumnIndex("addr")));
editphone.setText(cursor.getString(cursor.getColumnIndex("phone")));
editmobile.setText(cursor.getString(cursor.getColumnIndex("mobile")));
}
registerForContextMenu(editname);
imbutsave.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dbhelper=new MyOpenHelper(DetailActivity.this, "mycontacts.db",null,1);
SQLiteDatabase db=dbhelper.getReadableDatabase();
ContentValues values = new ContentValues();
String nameString=editname.getText().toString();
String emailString=editemail.getText().toString();
String compString=editcomp.getText().toString();
String postString=editpost.getText().toString();
String addrString=editaddr.getText().toString();
String phoneString=editphone.getText().toString();
String mobileString=editmobile.getText().toString();
if (!nameString.equals(""))
{
Cursor cursor=db.rawQuery("select * from contactTable where name=?", new String[]{nameString});
cursor.moveToFirst();
values.put("name",nameString);
values.put("email", emailString);
values.put("comp", compString);
values.put("post", postString);
values.put("addr", addrString);
values.put("phone", phoneString);
values.put("mobile", mobileString);
if (cursor.getCount()<=0) {
db.insert("contactTable", null, values);
values.clear();
Toast.makeText(DetailActivity.this, "联系人"+nameString+"成功保存",
Toast.LENGTH_LONG).show();
db.delete("contactTable", "name=?", new String[]{selectname});
Intent it=new Intent();
it.setClass(DetailActivity.this, MainActivity.class);
startActivity(it);
finish();
}else if (cursor.getCount()==1 && cursor.getString(cursor.getColumnIndex("name")).equals(selectname)) {
db.update("contactTable", values, "name=?", new String[]{selectname});
values.clear();
Toast.makeText(DetailActivity.this, "联系人"+nameString+"成功更新",
Toast.LENGTH_LONG).show();
Intent it=new Intent();
it.setClass(DetailActivity.this, MainActivity.class);
startActivity(it);
finish();
}else {
Toast.makeText(DetailActivity.this, "姓名已存在",
Toast.LENGTH_LONG).show();
}
}else {
Toast.makeText(DetailActivity.this, "姓名不能为空",
Toast.LENGTH_LONG).show();
}
}
});
}
}
main
public class MainActivity extends Activity {
final int rowcount=0;
ListView lv;
ImageButton ibutadd;
SQLiteDatabase db;
MyOpenHelper dbHelper;
String[] name=new String[50];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ibutadd=(ImageButton)findViewById(R.id.imageButton1);
lv=(ListView)findViewById(R.id.listView1);
dbHelper = new MyOpenHelper(MainActivity.this, "mycontacts.db",
null, 1);
final SQLiteDatabase db = dbHelper.getReadableDatabase();
Cursor cursor = db.rawQuery(
"select name from contactTable", null);
ibutadd.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent it=new Intent();
Bundle bundle=new Bundle();
bundle.putString("name", "");
it.putExtras(bundle);
it.setClass(MainActivity.this, DetailActivity.class);
startActivity(it);
}
});
final ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();/*在数组中存放数据*/
cursor.moveToFirst();
for(int i=0;i<cursor.getCount();i++)
{
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("name",cursor.getString(cursor.getColumnIndex("name")));
name[i]=cursor.getString(cursor.getColumnIndex("name"));
listItem.add(map);
if(i==cursor.getCount()){
break;
}
cursor.moveToNext();
}
SimpleAdapter mSimpleAdapter = new SimpleAdapter(this,listItem,//需要绑定的数据
R.layout.line,//每一行的布局
//动态数组中的数据源的键对应到定义布局的View中
new String[] {"name"},
new int[] {R.id.tv1});
lv.setAdapter(mSimpleAdapter);//为ListView绑定适配器
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
Intent it=new Intent(MainActivity.this, DetailActivity.class);
Bundle bundle=new Bundle();
bundle.putString("name", name[arg2]);
it.putExtras(bundle);
startActivity(it);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
|
|||||||||||||||||||||||||||||||||||
时间： 2024-08-09 11:06:37