que utiliza la operación sqlightCrud
primera clase de base de datos creat. paquete com.db;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import android.widget.Toast;
public class DataBaseSampleActivity {
/** for database */
static final String DataBaseName = "EmployeDB";
/** for employee table */
static final String EmployeTable = "Employees";
static final String ColEmpID = "EmpId";
static final String ColEmpName = "EmpName";
static final String ColEmpAge = "EmpAge";
static final String ColDept = "Dept";
/** for department table */
static final String DeptTable = "Department";
static final String ColDeptID = "DeptId";
static final String ColDeptName = "DeptName";
public static final int DATABASE_VERSION = 2;
//private static final String KEY_ROWID = "_id";
private static final String EMPLOYEE_TABLE_CREATE ="Create table " + EmployeTable +
//"(_id INTEGER UNIQUE," + [old code]
"("+ColEmpID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
ColEmpName + " VARCHAR(15) ," +
ColEmpAge + " INT(15) ," +
ColDept + " VARCHAR(15)) ";
private final Context context;
private DatabaseHelper DBHelper;
private SQLiteDatabase db;
public DataBaseSampleActivity(Context ctx){
Log.i("test****", "**test***");
this.context = ctx;
DBHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper{
public DatabaseHelper(Context context){
super(context, DataBaseName , null, DATABASE_VERSION);
Log.i("context","context");
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(EMPLOYEE_TABLE_CREATE);
Log.i("************", "table created");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
Log.w("tag", "Upgrading database from version " + oldVersion + " to "+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS " + EmployeTable);
onCreate(db);
}
};
public DataBaseSampleActivity open() throws SQLException{
db = DBHelper.getWritableDatabase();
Log.i("open", "message");
return this;
}
public void close(){
DBHelper.close();
}
//public long insert(Integer empid, String empname, Integer empage, String empdept) {
public long insert(String empname, Integer empage, String empdept) {
Log.i("**** suruchitest **** ","*** test ***");
ContentValues initialValues = new ContentValues();
//initialValues.put(ColEmpID, empid);
initialValues.put(ColEmpName, empname);
initialValues.put(ColEmpAge, empage);
initialValues.put(ColDept, empdept);
return db.insert(EmployeTable, null, initialValues);
}
public Cursor getEmpValues(){
Cursor mCursor = db.query(EmployeTable, null, null, null, null, null, null);
return mCursor;
}
public boolean deleteEmpList(long rowId){
Toast.makeText(context, "deleted", 2000).show();
return db.delete(EmployeTable, ColEmpID +" = " + rowId, null) > 0;
}
public boolean updateEmplist(String empname, Integer empage, String empdept, Integer rowid){
ContentValues initialValues = new ContentValues();
Log.i("##### "+rowid,""+empname+" "+empage+" "+empdept);
//initialValues.put(ColEmpID, rowid);
initialValues.put(ColEmpName,empname);
initialValues.put(ColEmpAge,empage);
initialValues.put(ColDept,empdept);
try{
int b = db.update(EmployeTable, initialValues, ColEmpID+ " = " + rowid, null);
Log.i("update", "up "+rowid+" ddd "+b);
return true;
}catch (Exception e){
Log.d("asdfasdfsadfasdf", "_--___--__--_=-_");
return false;
}
}
}
2. create Main Activity
package com.db;
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.Toast;
public class MainActivity extends Activity implements OnClickListener {
Button buttonsubmit;
EditText empid,empname,empage,empdept;
String emp_name, emp_dept;
//Integer emp_id,emp_age;
Integer emp_age;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonsubmit = (Button) findViewById(R.id.btnSubmit);
buttonsubmit.setOnClickListener(this);
// empid =(EditText) findViewById(R.id.empid);
empname =(EditText) findViewById(R.id.empname);
empage =(EditText) findViewById(R.id.empage);
empdept =(EditText) findViewById(R.id.empdpt);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
DataBaseSampleActivity dbObj = new DataBaseSampleActivity(getApplicationContext());
// String Emp_ids = empid.getText().toString();
// emp_id = Integer.parseInt(Emp_ids);
//emp_id = empid.getText().toString();
String Emp_ages = empage.getText().toString();
emp_age = Integer.parseInt(Emp_ages);
//emp_age = empage.getText().toString();
emp_name = empname.getText().toString();
emp_dept = empdept.getText().toString();
try {
Log.i("try", "message");
dbObj.open();
//long temp = dbObj.insert(emp_id, emp_name, emp_age, emp_dept);
long temp = dbObj.insert(emp_name, emp_age, emp_dept);
//Toast.makeText(getApplicationContext(), "temp"+temp, 3000).show();
dbObj.close();
Intent intent = new Intent(this,ShowListView.class);
startActivity(intent);
} catch (Exception e) {
// TODO: handle exception
Log.i("catch", "message");
}
}
}
2. Create listclass to show tha data
package com.db;
import java.lang.reflect.Array;
import java.util.ArrayList;
import android.R.integer;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class ShowListView extends Activity {
ArrayList<String> arrname = new ArrayList<String>();
ArrayList<String> arrage = new ArrayList<String>();
ArrayList<String> arrdept = new ArrayList<String>();
ArrayList<Integer> arrRowId = new ArrayList<Integer>();
ArrayList<Integer> arrDelId = new ArrayList<Integer>();
Array[] arr;
Button deleteBtn;
Button btnadd;
int index = 0;
public int pos;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.emplist);
//Toast.makeText(getApplicationContext(), "LIST VIEW", 5000).show();
ToGetCursorValues();
}
public void ToGetCursorValues(){
DataBaseSampleActivity db = new DataBaseSampleActivity(getApplicationContext());
db.open();
try {
Cursor cur = db.getEmpValues();
cur.moveToFirst();
arrRowId.clear();
arrname.clear();
arrage.clear();
arrdept.clear();
while (!cur.isAfterLast()) {
arrRowId.add(cur.getInt(cur.getColumnIndex(db.ColEmpID)));
arrname.add(cur.getString(cur.getColumnIndex(db.ColEmpName)));
arrage.add(cur.getString(cur.getColumnIndex(db.ColEmpAge)));
arrdept.add(cur.getString(cur.getColumnIndex(db.ColDept)));
cur.moveToNext();
}
//Log.i("#####","col "+arrlist.size());
//Toast.makeText(getApplicationContext(), "* "+arrname.size()+","+arrage.size()+","+arrdept.size(), 5000).show();
//Toast.makeText(getApplicationContext(), "***** "+arrRowId.get(0), 2000).show();
} catch (Exception e) {
// TODO: handle exception
}
ListView lst = (ListView) findViewById(R.id.mylist);
lst.setAdapter(new ListAdapter(getApplicationContext()));
db.close();
}
public class ListAdapter extends BaseAdapter implements OnCheckedChangeListener,OnClickListener{
private LayoutInflater inflater = null;
public ListAdapter(Context c){
Log.i("Context","Context");
inflater = LayoutInflater.from(c);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
//return 0;
return arrname.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
class ViewHolder{
TextView empnameview;
TextView empageview;
TextView empdeptview;
CheckBox empchkbox;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(final int position, View convertView, ViewGroup parent) {
Log.i("*view","view*");
ViewHolder vh;
//ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
Log.i("*null1*","*null1*");
vh = new ViewHolder();
convertView = inflater.inflate(R.layout.customlist, null);
Log.i("*null2*","*null2*");
pos = position;
vh.empnameview = (TextView) convertView.findViewById(R.id.ename);
vh.empageview = (TextView) convertView.findViewById(R.id.eage);
vh.empdeptview = (TextView) convertView.findViewById(R.id.edept);
vh.empchkbox = (CheckBox) convertView.findViewById(R.id.ckekDelete);
Log.i("*null3*","*null3*");
vh.empnameview.setText(arrname.get(position));
vh.empnameview.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(ShowListView.this,UpdateDB.class);
String name = arrname.get(position);
int age = Integer.parseInt(arrage.get(position));
String dept = arrdept.get(position);
int rowid = arrRowId.get(position);
intent.putExtra("KeyName" , name);
intent.putExtra("Keyage" , age);
intent.putExtra("Keydept" , dept);
intent.putExtra("Rowid", rowid);
startActivity(intent);
}
});
vh.empageview.setText(arrage.get(position));
vh.empdeptview.setText(arrdept.get(position));
vh.empchkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
//Toast.makeText(getApplicationContext(), "OnChecked"+position, 2000).show();
if(buttonView.isChecked()){
arrDelId.add(arrRowId.get(position));
//Toast.makeText(getApplicationContext(), "OnChecked"+position, 2000).show();
// DataBaseSampleActivity db = new DataBaseSampleActivity(getApplicationContext());
// db.open();
// db.deleteEmpList(arrRowId.get(position));
// Toast.makeText(getApplicationContext(), "delet", 3000).show();
// db.close();
//
}
else{
for(int i=0;i<arrDelId.size();i++){
if(arrRowId.get(position) == arrDelId.get(i)){
arrDelId.remove(i);
}
}
}
}
});
Log.i("******", "complete");
} else {
Log.i("*not*","*not*");
vh = (ViewHolder) convertView.getTag();
}
deleteBtn = (Button) findViewById(R.id.delBtn);
deleteBtn.setOnClickListener(this);
btnadd = (Button) findViewById(R.id.addBtn);
btnadd.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent inte = new Intent(ShowListView.this, MainActivity.class);
startActivity(inte);
}
});
// imageView.setImageResource(thumbarr[position]);
return convertView;
}
public View getView1(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
for(int i=0;i<arrDelId.size();i++){
//Toast.makeText(getApplicationContext(), "OnDeleteClick "+i, 2000).show();
DataBaseSampleActivity db = new DataBaseSampleActivity(getApplicationContext());
db.open();
db.deleteEmpList(arrDelId.get(i));
//Toast.makeText(getApplicationContext(), "delet", 3000).show();
db.close();
}
ToGetCursorValues();
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
}
}
}
3. for update
package com.db;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class UpdateDB extends Activity implements OnClickListener{
Intent intnt;
EditText editname,editage,editdept;
Button updateBtn;
int row_id;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
editname = (EditText) findViewById(R.id.empname);
editage = (EditText) findViewById(R.id.empage);
editdept = (EditText) findViewById(R.id.empdpt);
updateBtn = (Button) findViewById(R.id.btnSubmit);
updateBtn.setText("Update");
intnt = getIntent();
editname.setText(intnt.getStringExtra("KeyName"));
editage.setText(""+intnt.getIntExtra("Keyage",0));
editdept.setText(intnt.getStringExtra("Keydept"));
row_id = intnt.getIntExtra("Rowid", 0);
updateBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "update", 3000).show();
DataBaseSampleActivity db = new DataBaseSampleActivity(getApplicationContext());
db.open();
String empname = editname.getText().toString();
int empage = Integer.parseInt(editage.getText().toString());
String empdept = editdept.getText().toString();
//db.deleteEmpList(row_id);
db.updateEmplist(empname, empage, empdept,row_id);
//Toast.makeText(getApplicationContext(), "delet", 3000).show();
db.close();
Intent list = new Intent(UpdateDB.this,ShowListView.class);
startActivity(list);
}
});
// Toast.makeText(getApplicationContext(), "update "+intnt.getIntExtra("Keyage",0), 3000).show();
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
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