Help me

Main Activity

package com.example.tempele.dbexample;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    EditText buckysInput;
    TextView buckysText;
    MyDBHandler dbHandler;
    EditText ppr;
    EditText numRides;
    double pprvar;
    int numridesvar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        buckysInput = (EditText) findViewById(R.id.buckysInput);
        buckysText = (TextView) findViewById(R.id.buckysText);
        ppr = (EditText) findViewById(R.id.ppr);
        numRides = (EditText) findViewById(R.id.numRides);

        //pprvar = Double.parseDouble(ppr.getText().toString());
        //numridesvar = Integer.parseInt(numRides.getText().toString());

        //pprvar = 1.2;
        //numridesvar = 1;

        dbHandler = new MyDBHandler(this, null, null, 1);
        printDatabase();

    }

    //Add a product to the database
    public void addButtonClicked(View view){

        Product product = new Product(buckysInput.getText().toString());
        Product priceper = new Product(ppr.getText().toString());
        Product rides = new Product(numRides.getText().toString());

        dbHandler.addProduct(product, priceper, rides);
        printDatabase();
    }

    //Delete items
    public void deleteButtonClicked(View view){
        String inputText = buckysInput.getText().toString();
        dbHandler.deleteProduct(inputText);
        printDatabase();
    }

    //Print the database
    public void printDatabase(){
        String dbString = dbHandler.databaseToString();
        buckysText.setText(dbString);
        buckysInput.setText("");
        ppr.setText("");
        numRides.setText("");
    }

}














Product Activity


package com.example.tempele.dbexample;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    EditText buckysInput;
    TextView buckysText;
    MyDBHandler dbHandler;
    EditText ppr;
    EditText numRides;
    double pprvar;
    int numridesvar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        buckysInput = (EditText) findViewById(R.id.buckysInput);
        buckysText = (TextView) findViewById(R.id.buckysText);
        ppr = (EditText) findViewById(R.id.ppr);
        numRides = (EditText) findViewById(R.id.numRides);

        //pprvar = Double.parseDouble(ppr.getText().toString());
        //numridesvar = Integer.parseInt(numRides.getText().toString());

        //pprvar = 1.2;
        //numridesvar = 1;

        dbHandler = new MyDBHandler(this, null, null, 1);
        printDatabase();

    }

    //Add a product to the database
    public void addButtonClicked(View view){

        Product product = new Product(buckysInput.getText().toString());
        Product priceper = new Product(ppr.getText().toString());
        Product rides = new Product(numRides.getText().toString());

        dbHandler.addProduct(product, priceper, rides);
        printDatabase();
    }

    //Delete items
    public void deleteButtonClicked(View view){
        String inputText = buckysInput.getText().toString();
        dbHandler.deleteProduct(inputText);
        printDatabase();
    }

    //Print the database
    public void printDatabase(){
        String dbString = dbHandler.databaseToString();
        buckysText.setText(dbString);
        buckysInput.setText("");
        ppr.setText("");
        numRides.setText("");
    }

}





MYDBHANDler activity



package com.example.tempele.dbexample;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    EditText buckysInput;
    TextView buckysText;
    MyDBHandler dbHandler;
    EditText ppr;
    EditText numRides;
    double pprvar;
    int numridesvar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        buckysInput = (EditText) findViewById(R.id.buckysInput);
        buckysText = (TextView) findViewById(R.id.buckysText);
        ppr = (EditText) findViewById(R.id.ppr);
        numRides = (EditText) findViewById(R.id.numRides);

        //pprvar = Double.parseDouble(ppr.getText().toString());
        //numridesvar = Integer.parseInt(numRides.getText().toString());

        //pprvar = 1.2;
        //numridesvar = 1;

        dbHandler = new MyDBHandler(this, null, null, 1);
        printDatabase();

    }

    //Add a product to the database
    public void addButtonClicked(View view){

        Product product = new Product(buckysInput.getText().toString());
        Product priceper = new Product(ppr.getText().toString());
        Product rides = new Product(numRides.getText().toString());

        dbHandler.addProduct(product, priceper, rides);
        printDatabase();
    }

    //Delete items
    public void deleteButtonClicked(View view){
        String inputText = buckysInput.getText().toString();
        dbHandler.deleteProduct(inputText);
        printDatabase();
    }

    //Print the database
    public void printDatabase(){
        String dbString = dbHandler.databaseToString();
        buckysText.setText(dbString);
        buckysInput.setText("");
        ppr.setText("");
        numRides.setText("");
    }

}






Activity_main.xml


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.tempele.dbexample.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Add"
        android:id="@+id/addButton"
        android:layout_centerVertical="true"
        android:layout_toStartOf="@+id/buckysText" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Delete"
        android:id="@+id/deleteButton"
        android:layout_marginRight="24dp"
        android:onClick="deleteButtonClicked"
        android:layout_alignTop="@+id/addButton"
        android:layout_toEndOf="@+id/buckysText" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/buckysInput"
        android:width="250dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:hint="Name" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/buckysText"
        android:layout_below="@+id/addButton"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="36dp" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/ppr"
        android:width="250dp"
        android:hint="Price per Ride"
        android:layout_marginTop="28dp"
        android:layout_below="@+id/buckysInput"
        android:layout_alignStart="@+id/buckysInput" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/numRides"
        android:width="250dp"
        android:hint="Number of Rides"
        android:layout_below="@+id/ppr"
        android:layout_alignStart="@+id/ppr"
        android:layout_marginTop="30dp" />

</RelativeLayout>