Android Program take notes(Add & List only)

Android Program take notes(Add & List only)

ListNotes Activity

package com.ramki.takenotes;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class ListNotes extends Activity implements OnClickListener {
Button bAdd, bDelete, bUpdate;
EditText etNotes;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.listnotes);
TextView tv = (TextView) findViewById(R.id.list);
etNotes = (EditText) findViewById(R.id.etnotes);

bAdd = (Button) findViewById(R.id.badd);
bAdd.setOnClickListener(this);

DBAdapter ListRec = new DBAdapter(this);
ListRec.open();
String getInfo = ListRec.getInfo();

ListRec.close();

tv.setText(getInfo);

}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.badd:

String notes2 = etNotes.getText().toString();
DBAdapter WriteDB = new DBAdapter(ListNotes.this);
WriteDB.open();

WriteDB.writeInfo(notes2);
WriteDB.close();

break;

}
}


}

DBAdapter

package com.ramki.takenotes;

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;

public class DBAdapter {

public static final String ROWID = "rowid";
public static final String FIELDNOTES = "notes";

private static final String DBNAME = "takenotes1.db";
private static final String DBTABLE = "takenotes";
private static final int DBVERSION = 1;

private final Context ourContext;
private SQLiteDatabase ourDB;
private DBHelper ourHelper;

private class DBHelper extends SQLiteOpenHelper{

public DBHelper(Context context) {
// TODO Auto-generated constructor stub
super(context, DBNAME, null, DBVERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub

db.execSQL("CREATE TABLE " + DBTABLE + " (" +
ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
  FIELDNOTES + " TEXT NOT NULL);"
);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF NOT EXIST " + DBTABLE);
onCreate(db);

}
}


public DBAdapter(Context c)
{
ourContext = c;

}

public DBAdapter open() throws SQLException
{
ourHelper = new DBHelper(ourContext);
ourDB = ourHelper.getWritableDatabase();
return this;
}

public void close(){
ourHelper.close();
}

//INSERT THE RECORDS INTO TABLE 
public long writeInfo(String notes2) 
{
// TODO Auto-generated method stub
ContentValues cv = new ContentValues();
cv.put(FIELDNOTES, notes2);
return ourDB.insert(DBTABLE, null, cv);

}

//LIST THE RECORDS FROM TABLE 
public String getInfo() {
// TODO Auto-generated method stub
String[] columns = new String[]{ROWID, FIELDNOTES};
Cursor c = ourDB.query(DBTABLE, columns, null,null, null, null,null);
String results = "";
int iRow = c.getColumnIndex(ROWID);
int iNotes = c.getColumnIndex(FIELDNOTES);

for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
results = results + c.getString(iRow) + " " +c.getString(iNotes) + "\n"; 
}

return results;
}




}

XML Layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/etnotes"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:text="Enter the Notes" >

        <requestFocus />
    </EditText>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/badd"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Add" />

        <Button
            android:id="@+id/bdelete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Delete" />

        <Button
            android:id="@+id/bupdate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Update" />
    </LinearLayout>

    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <TableRow>

            <TextView
                android:id="@+id/notes"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:text="List Notes from DB"
                android:textAppearance="?android:attr/textAppearanceMedium" />
        </TableRow>
    </TableLayout>

    <TextView
        android:id="@+id/list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Record not found"
        android:textAppearance="?android:attr/textAppearanceMedium" />

</LinearLayout>