Allow the user to enter the number of people in the party. Calculate and display the...

Allow the user to enter the number of people in the party. Calculate and display the amount owed by each person if the bill were to be split evenly among the party members.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mdc.tippcalcula">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

-------------------------------

<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:columnCount="2"
    android:useDefaultMargins="true"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/amountEditText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint=""
        android:digits="0123456789"
        android:inputType="number"
        android:layout_column="0"
        android:layout_columnSpan="2"
        android:maxLength="6"/>

    <TextView
        android:id="@+id/amountTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_row="0"
        android:layout_column="0"
        android:layout_columnSpan="2"
        android:layout_gravity="fill_horizontal"
        android:background="@color/amount_background"
        android:elevation="@dimen/elevation"
        android:hint="@string/enter_amount"
        android:padding="@dimen/textview_padding"
        />

    <TextView
        android:id="@+id/percentTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical|end"
        android:text="@string/tip_percentage" />

    <SeekBar
        android:id="@+id/percentSeekBar"
        android:layout_width="wrap_content"
        android:layout_height="@dimen/seekbar_height"
        android:layout_gravity="fill_horizontal"
        android:max="30"
        android:progress="15"/>

    <TextView
        android:id="@+id/TipLabelTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end"
        android:text="@string/tip" />

    <TextView
        android:id="@+id/tipTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="fill_horizontal"
        android:background="@color/result_background"
        android:elevation="@dimen/elevation"
        android:gravity="center"
        android:padding="@dimen/textview_padding" />

    <TextView
        android:id="@+id/totalLabelTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end"
        android:text="@string/total" />

    <TextView
        android:id="@+id/totalTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="fill_horizontal"
        android:background="@color/result_background"
        android:elevation="@dimen/elevation"
        android:gravity="center"
        android:padding="@dimen/textview_padding"
        />

    <EditText
        android:id="@+id/numberOfPeopleEditText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="fill_horizontal"
        android:background="@color/result_background"
        android:elevation="@dimen/elevation"
        android:gravity="center"
        android:padding="@dimen/textview_padding"
        android:ems="10"
        android:hint="Enter Number Of People"
        android:digits="012345678"
        android:inputType="number"
        android:layout_columnSpan="2"/>

    <TextView
        android:id="@+id/eachPersonLabelTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end"
        android:text="@string/each" />

    <TextView
        android:id="@+id/eachPersonTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="fill_horizontal"
        android:background="@color/result_background"
        android:elevation="@dimen/elevation"
        android:gravity="center"
        android:padding="@dimen/textview_padding"
        />

</GridLayout>

----------

package com.mdc.tippcalcula;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;

import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

import java.text.NumberFormat;

public class MainActivity extends AppCompatActivity {

    private static final NumberFormat currencyFormat = NumberFormat.getCurrencyInstance();
    private static final NumberFormat percentFormat = NumberFormat.getCurrencyInstance();

    private double billAmount = 0.0;
    private double percent = 0.15;
    private double numPeople = 0;
    private TextView percentTextView;
    private TextView tipTextView;
    private TextView amountTextView;
    private TextView totalTextView;
    private TextView eachPersonTextView;


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

        amountTextView = (TextView)  findViewById (R.id.amountTextView);
        percentTextView = (TextView)  findViewById (R.id.percentTextView);
        tipTextView = (TextView) findViewById(R.id.tipTextView);
        totalTextView = (TextView) findViewById(R.id.totalTextView);
        eachPersonTextView = (TextView) findViewById(R.id.eachPersonTextView);

        tipTextView.setText(currencyFormat.format(0));
        totalTextView.setText(currencyFormat.format(0));
        eachPersonTextView.setText(currencyFormat.format(0));

        EditText amountEditText = (EditText) findViewById(R.id.amountEditText);
        amountEditText.addTextChangedListener(amountEditTextWatcher);


        SeekBar percentSeekBar = (SeekBar) findViewById(R.id.percentSeekBar);
        percentSeekBar.setOnSeekBarChangeListener(seekBarListener);
    }

    private void calculate(){
        percentTextView.setText(percentFormat.format(percent));

        double tip = billAmount * percent;
        double total = billAmount + tip;


        tipTextView.setText(currencyFormat.format(tip));
        totalTextView.setText((currencyFormat.format(total)));
    }



    private final OnSeekBarChangeListener seekBarListener = new OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean b)
        {
            percent = progress / 100.0;
            calculate();
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

        }
    };

    private final TextWatcher amountEditTextWatcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2)
        {
            try {
                billAmount = Double.parseDouble(charSequence.toString()) / 100.0;
                amountTextView.setText(currencyFormat.format(billAmount));
            }
            catch (NumberFormatException e){
                amountTextView.setText("");
                billAmount = 0.0;
            }
        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { }

        @Override
        public void afterTextChanged(Editable editable) { }
    };
}

------

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <dimen name="textview_padding">12dp</dimen>
    <dimen name="elevation">4dp</dimen>
    <dimen name="seekbar_height">40dp</dimen>
</resources>

---

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#6200EE</color>
    <color name="colorPrimaryDark">#3700B3</color>
    <color name="colorAccent">#03DAC5</color>
    <color name="amount_background">#BBDEFB</color>
    <color name="result_background">#ffE0B2</color>
</resources>

----

<resources>
    <string name="app_name">Tip Calculator</string>
    <string name="enter_amount"> Enter Amount</string>
    <string name="tip_percentage">15%</string>
    <string name="tip">Tip</string>
    <string name="total">Total</string>
    <string name="number">No. Of People</string>
    <string name="each">Each Person</string>
</resources>

Solutions

Expert Solution

***Please upvote/thumbsup if you liked the answer***

Screenshot of the modified Android code:-

Output:-

Modified Android Code to copy:-

package com.example.myapp;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;

import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

import java.text.NumberFormat;

public class MainActivity extends AppCompatActivity {

    private static final NumberFormat currencyFormat = NumberFormat.getCurrencyInstance();
    private static final NumberFormat percentFormat = NumberFormat.getCurrencyInstance();

    private double billAmount = 0.0;
    private double percent = 0.15;
    private double numPeople = 0;
    private TextView percentTextView;
    private TextView tipTextView;
    private TextView amountTextView;
    private TextView totalTextView;
    private TextView eachPersonTextView;




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

        amountTextView = (TextView)  findViewById (R.id.amountTextView);
        percentTextView = (TextView)  findViewById (R.id.percentTextView);
        tipTextView = (TextView) findViewById(R.id.tipTextView);
        totalTextView = (TextView) findViewById(R.id.totalTextView);
        eachPersonTextView = (TextView) findViewById(R.id.eachPersonTextView);


        tipTextView.setText(currencyFormat.format(0));
        totalTextView.setText(currencyFormat.format(0));
        eachPersonTextView.setText(currencyFormat.format(0));

        EditText amountEditText = (EditText) findViewById(R.id.amountEditText);
        amountEditText.addTextChangedListener(amountEditTextWatcher);

        EditText numberofPeopleEditText = (EditText) findViewById(R.id.numberOfPeopleEditText);
        numberofPeopleEditText.addTextChangedListener(numberOfPeopleEditTextWatcher);

        SeekBar percentSeekBar = (SeekBar) findViewById(R.id.percentSeekBar);
        percentSeekBar.setOnSeekBarChangeListener(seekBarListener);
    }

    private void calculate(){
        percentTextView.setText(percentFormat.format(percent));

        double tip = billAmount * percent;
        double total = billAmount + tip;
        double eachPersonAmt = total/numPeople;

        tipTextView.setText(currencyFormat.format(tip));
        totalTextView.setText((currencyFormat.format(total)));
        eachPersonTextView.setText(currencyFormat.format(eachPersonAmt));
    }



    private final OnSeekBarChangeListener seekBarListener = new OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean b)
        {
            percent = progress / 100.0;
            calculate();
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

        }
    };

    private final TextWatcher amountEditTextWatcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2)
        {
            try {
                billAmount = Double.parseDouble(charSequence.toString()) / 100.0;
                amountTextView.setText(currencyFormat.format(billAmount));
            }
            catch (NumberFormatException e){
                amountTextView.setText("");
                billAmount = 0.0;
            }
        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { }

        @Override
        public void afterTextChanged(Editable editable) { }
    };

    private final TextWatcher numberOfPeopleEditTextWatcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2)
        {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            try {

                numPeople = Integer.parseInt(charSequence.toString());

            }
            catch (NumberFormatException e){

                numPeople = 0;
            }
        }

        @Override
        public void afterTextChanged(Editable editable) { }
    };
}

venereology answered 4 months ago

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