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我有4班。 1：數據庫處理器顯示數據庫android的一些值？
package as.d.d;
import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseHandler extends SQLiteOpenHelper{
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "contactsManager";
private static final String TABLE_CONTACTS = "contacts";
private static final String KEY_ID = "id";
private static final String KEY_NAME = "name";
private static final String KEY_PH_NO = "phone_number";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
+ KEY_PH_NO + " TEXT" + ")";
db.execSQL(CREATE_CONTACTS_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);
onCreate(db);
}
void addContact(StudentInfo studentInfo) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, studentInfo.getName()); // Contact Name
values.put(KEY_PH_NO, studentInfo.getPhoneNumber()); // Contact Phone
db.insert(TABLE_CONTACTS, null, values);
db.close();
}
StudentInfo getContact(int id) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID,
KEY_NAME, KEY_PH_NO }, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
StudentInfo studentInfo = new StudentInfo(Integer.parseInt(cursor.getString(0)),
cursor.getString(1), cursor.getString(2));
// return contact
return studentInfo;
}
public List<StudentInfo> getAllStudentInfo() {
List<StudentInfo> studentList = new ArrayList<StudentInfo>();
String selectQuery = "SELECT * FROM " + TABLE_CONTACTS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
StudentInfo studentInfo = new StudentInfo();
studentInfo.setID(Integer.parseInt(cursor.getString(0)));
studentInfo.setName(cursor.getString(1));
studentInfo.setPhoneNumber(cursor.getString(2));
studentList.add(studentInfo);
} while (cursor.moveToNext());
}
return studentList;
}
public int updateContact(StudentInfo studentInfo) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, studentInfo.getName());
values.put(KEY_PH_NO, studentInfo.getPhoneNumber());
return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
new String[] { String.valueOf(studentInfo.getID()) });
}}
2：StudentInfo
package as.d.d;
public class StudentInfo {
int _id;
String _name;
String _phone_number;
public StudentInfo(){
}
public StudentInfo(int id, String name, String _phone_number){
this._id = id;
this._name = name;
this._phone_number = _phone_number;
}
public StudentInfo(String name, String _phone_number){
this._name = name;
this._phone_number = _phone_number;
}
public int getID(){
return this._id;
}
public void setID(int id){
this._id = id;
}
public String getName(){
return this._name;
}
public void setName(String name){
this._name = name;
}
public String getPhoneNumber(){
return this._phone_number;
}
public void setPhoneNumber(String phone_number){
this._phone_number = phone_number;
}}
3：添加
package as.d.d;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class add extends Activity implements OnClickListener{
Button b1,b2;
EditText e2,e3;
TextView t1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add);
b1=(Button)findViewById(R.id.button1);
b2=(Button)findViewById(R.id.button2);
e2=(EditText)findViewById(R.id.editText2);
e3=(EditText)findViewById(R.id.editText3);
t1=(TextView)findViewById(R.id.AtextView1);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
DatabaseHandler db = new DatabaseHandler(this);
List<StudentInfo> studentInfo = db.getAllStudentInfo();
for (StudentInfo cn : studentInfo){
t1.setText("Id:"+(cn.getID()+1));
}
}
@Override
public void onClick(View v) {
if(v==b2){
startActivity(new Intent(add.this, FdActivity.class));
}
else if(v==b1){
String s2=e2.getText().toString();
String s3=e3.getText().toString();
if(s2.trim().equals("")||s3.trim().equals("")){
Toast.makeText(getApplicationContext(), "Please Submit Student Information",Toast.LENGTH_SHORT).show();
}
else{
DatabaseHandler db = new DatabaseHandler(this);
Log.d("Insert: ", "Inserting ..");
db.addContact(new StudentInfo(s2,s3));
Log.d("Reading: ", "Reading all contacts..");
List<StudentInfo> studentInfo = db.getAllStudentInfo();
for (StudentInfo cn : studentInfo){
t1.setText("Id:"+(cn.getID()+1));
}}}}}
4：addmark
package as.d.d;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;
import android.widget.Toast;
public class addmark extends Activity{
AutoCompleteTextView a1;
TextView t1,t2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addmark);
a1=(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
t1=(TextView)findViewById(R.id.amtextView1);
t2=(TextView)findViewById(R.id.amtextView2);
DatabaseHandler db = new DatabaseHandler(this);
final List<StudentInfo> studentInfo = db.getAllStudentInfo();
final ArrayList<String> s1 = new ArrayList<String>();
final ArrayList<String> s3 = new ArrayList<String>();
for (StudentInfo cn : studentInfo) {
s1.add(cn.getName());
s3.add(cn.getPhoneNumber());
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,s1);
a1.setThreshold(1);
a1.setAdapter(adapter);
a1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
}
});
在第三類（添加）我使用自動生成螺柱的Textview ent id（數字（int））和兩個文本字段，用於通過按下按鈕將學生姓名和電話號碼提交到數據庫。在此，學生證，姓名和電話號碼成功提交。第四課我使用自動完成文本視圖來顯示姓名我從類3提交。當我選擇一個名稱假設Farhan（我已經提交到數據庫中，ID是4，電話號碼是99876存儲在數據庫中），那麼我想看到兩個文本視圖中的ID和電話號碼（TextView t1 ，T2）？
我需要在第四類 – bhoot4242 2013-04-05 13:57:21