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**我已经使用四个单选按钮来增加和减少钱包中的金额。每当我打开应用程序它崩溃。每当我打开应用程序它崩溃我不是什么错误，请别人帮助我。我是Android新手。在这个应用程序中，我使用了四个单选按钮来添加金额并减去金额。 **如何在android中使用radiogroup中的edittext？
<?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. **
你可以请出示xml文件 –
**我在程序中添加了** –