project by using Java prgramming for Android Studio: Average Income Tax by Count

Question

project by using Java prgramming for Android Studio: Average Income Tax by Country App Application title: Average Income Tax by Country App Purpose: The Average Income Tax by Country app allows the user to enter the amount of taxable income earned in the past year. The user selects his or her country of residence and the yearly income tax is displayed. Algorithms: The opening screen requests two integer values. The user can select addition, subtraction, or multiplication. The entire math problem is displayed with the result. Conditions: The following table displays the annual income tax percentages. Country Average Income Tax China 25% Germany 32% Sweden 34% USA 18%

Explanation / Answer

import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.EditText; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.TextView; import android.widget.Toast; import android.widget.Button; public class AverageIncomeTaxbyCountryApp extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { final double china_tax = 25; final double germany_tax = 32; final double sweden_tax = 34; final double usa_tax = 18; super.onCreate(savedInstanceState); setContentView(R.layout.activity_average_income_taxby_country_app); getSupportActionBar().setDisplayShowHomeEnabled(true); getSupportActionBar().setLogo(R.mipmap.ic_launcher); getSupportActionBar().setDisplayUseLogoEnabled(true); final EditText income = (EditText) findViewById(R.id.income); final TextView result1 = ((TextView)findViewById(R.id.result1)); final TextView result2 = ((TextView)findViewById(R.id.result2)); final TextView result3 = ((TextView)findViewById(R.id.result3)); final TextView result4 = ((TextView)findViewById(R.id.result4)); // RadioGroup rasidence_radiogroup = (RadioGroup)findViewById(R.id.radiogroup); rasidence_radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { public void onCheckedChanged(RadioGroup group, int checkedId) { double choosen_tax = 0; final double tax; RadioButton checkedRadioButton = (RadioButton)findViewById(checkedId); final String text = checkedRadioButton.getText().toString(); if (text.equals("China")) choosen_tax = china_tax; else if (text.equals("Sweden")) choosen_tax = sweden_tax; else if (text.equals("Germany")) choosen_tax = germany_tax; else if (text.equals("USA")) choosen_tax = usa_tax; Toast.makeText(getApplicationContext(), text +" has " + choosen_tax + "% tax rate.", Toast.LENGTH_SHORT).show(); tax = choosen_tax; double input_first_income = Double.parseDouble(income.getText().toString()); final double total = input_first_income; final double cal_tax_amount = total * (choosen_tax / 100); final double total_after_tax = total - cal_tax_amount; Button calculate = (Button) findViewById(R.id.calculate_btn); calculate.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { result1.setText(text + " has " + tax + "% tax."); result2.setText("Your total income is $" + total); result3.setText("Your tax is $" + cal_tax_amount); result4.setText("Your income after tax is $" + total_after_tax); } }); } }); } }

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