wie Edittext innerhalb der Radiogruppe in Android verwenden?

Question

** Ich habe vier Radiobuttons zum Addieren und Subtrahieren des Betrags in der Brieftasche verwendet. Immer wenn ich die App öffne, stürzt es ab. Wann immer ich die App öffne, stürzt es ab. Ich weiß nicht, was Fehler ist. Bitte, jemand hilft mir. Ich bin neu bei Android. In dieser App habe ich vier Radiobuttons verwendet, um den Betrag hinzuzufügen und den Betrag zu subtrahieren. **

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" 
    android:background="@drawable/form" 
    tools:context="com.sivaneshsg.wallet.MainActivity"> 

    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:text="Amount" 
     android:textSize="25sp" 
     android:textStyle="italic" 
     android:textColor="@android:color/black" 
     android:paddingTop="5dp" 
     android:paddingBottom="10dp" 
     android:paddingLeft="10dp"/> 
    <EditText 
     android:id="@+id/inputamount" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:hint="Amount in Rs." 
     android:paddingTop="5dp" 
     android:paddingBottom="10dp" 
     android:paddingLeft="10dp" 
     android:inputType="number" 
     android:ems="10" 
     /> 
    <RadioGroup 
     android:id="@+id/rgroup" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:padding="10dp" 

     > 
    <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Income" 
     android:textStyle="italic" 
      android:textSize="20sp" 
     android:textColor="@android:color/black" 
      android:paddingBottom="10dp"/> 
    <LinearLayout 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:orientation="horizontal"> 
    <RadioButton 
       android:id="@+id/cash1" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="Cash" 
       android:textSize="15dp" 
       android:paddingRight="10dp" 

     android:textColor="@android:color/black" 
       /> 
    <RadioButton 
       android:id="@+id/card1" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="Card" 

     android:textColor="@android:color/black" 
       /> 
     </LinearLayout> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Expense" 
      android:textSize="20dp" 
      android:textStyle="italic" 
      android:textColor="@android:color/black" 
      android:paddingBottom="10dp"/> 
     <LinearLayout 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:orientation="horizontal"> 
      <RadioButton 
       android:id="@+id/cash2" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="Cash" 
       android:textColor="@android:color/black" 
       android:textSize="15sp" 

       android:paddingRight="10dp" 
       /> 

    <RadioButton 
     android:id="@+id/card2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Card" 
     android:textSize="15sp" 

     android:textColor="@android:color/black" 
     /> 
     </LinearLayout> 
     </RadioGroup> 
    <Button 
     android:id="@+id/button" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="OK" 

     /> 


    <TextView 
     android:id="@+id/amountcard" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textColor="@android:color/black" 
     android:text="Amount in Card : RS. 0" 
     android:textSize="25sp" 
     android:padding="10dp"/> 
    <TextView 
     android:id="@+id/amountcash" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Amount in Cash : Rs. 0" 
     android:textSize="25sp" 
     android:textColor="@android:color/black" 
     android:padding="10dp"/> 
    <TextView 
     android:id="@+id/amountwallet" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Total Amount in Wallet : RS. 0" 
     android:textSize="23sp" 
     android:textColor="@android:color/black" 
     android:textStyle="bold" 
     android:padding="10dp"/> 

</LinearLayout> 









package com.sivaneshsg.wallet; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.Button; 
import android.widget.CompoundButton; 
import android.widget.EditText; 
import android.widget.RadioGroup; 
import android.widget.TextView; 
import android.widget.Toast; 

import static android.icu.lang.UCharacter.GraphemeClusterBreak.T; 

public class MainActivity extends AppCompatActivity { 

    int cashamount = 0; 
    int cardamount = 0; 
    int totalamount; 


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


     EditText et = (EditText) findViewById(R.id.inputamount); 
     final int amount = Integer.parseInt(et.getText().toString()); 
     RadioGroup rg = (RadioGroup) findViewById(R.id.rgroup); 
     rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { 

      @Override 
      public void onCheckedChanged(RadioGroup group, int checkedId) { 
       if (checkedId == R.id.card1) { 
        cardamount = cardamount + amount; 
       } else if (checkedId == R.id.cash1) { 
        cashamount = cashamount + amount; 
       } else if (checkedId == R.id.cash2) { 
        cashamount = cashamount - amount; 
       } else if (checkedId == R.id.card2) { 
        cardamount = cardamount - amount; 
       } 

      } 
     }); 
     Button button = (Button) findViewById(R.id.button); 
     button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       TextView cash = (TextView) findViewById(R.id.amountcash); 
       TextView card = (TextView) findViewById(R.id.amountcard); 
       TextView wallet = (TextView) findViewById(R.id.amountwallet); 
       cash.setText("Amount in Cash : RS. " + cashamount); 
       card.setText("Amount in Card : RS. " + cardamount); 
       totalamount = cashamount + cashamount; 
       wallet.setText("Total Amount in Wallet : RS. " + totalamount); 

      } 
     }); 
    } 
} 

**Whenever i open the app it crashes i don't what is error please someone help me. i am new to android. In this app i have used four radio buttons for add the amount and subtracting the amount. ** 

Answer 1

import android.os.Bundle; 

import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.RadioGroup; 
import android.widget.TextView; 


public class teste extends AppCompatActivity { 

int cashamount = 0; 
int cardamount = 0; 
int totalamount; 


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


    EditText et = (EditText) findViewById(R.id.inputamount); 
    final String amount = (et.getText().toString()); 
    RadioGroup rg = (RadioGroup) findViewById(R.id.rgroup); 
    rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { 

     @Override 
     public void onCheckedChanged(RadioGroup group, int checkedId) { 
      if (checkedId == R.id.card1) { 
       cardamount = Integer.parseInt(cardamount + amount); 
      } else if (checkedId == R.id.cash1) { 
       cashamount = Integer.parseInt(cashamount + amount); 
      } else if (checkedId == R.id.cash2) { 
       cashamount -= Integer.parseInt(amount); 
      } else if (checkedId == R.id.card2) { 
       cardamount -= Integer.parseInt(amount); 
      } 

     } 
    }); 
    Button button = (Button) findViewById(R.id.button); 
    button.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      TextView cash = (TextView) findViewById(R.id.amountcash); 
      TextView card = (TextView) findViewById(R.id.amountcard); 
      TextView wallet = (TextView) findViewById(R.id.amountwallet); 
      cash.setText("Amount in Cash : RS. " + cashamount); 
      card.setText("Amount in Card : RS. " + cardamount); 
      totalamount = cashamount + cashamount; 
      wallet.setText("Total Amount in Wallet : RS. " + totalamount); 

     } 
    }); 
} 

}

den obigen Code versuchen, Ihr Problem

final int amount = Integer.parseInt(et.getText().toString());