如何在 Android 中显示单选按钮的内容？
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【中文标题】如何在 Android 中显示单选按钮的内容？【英文标题】：How can I display the content of radio button in Android? 【发布时间】：2018-02-24 15:24:13 【问题描述】：我正在尝试在 textview 中显示单选按钮的内容，而无需单击任何按钮。 我的活动是这样的： 在这里，我选择一个radioButton，然后在editText 中写入一些数字。例如，如果我选择第一个按钮并在 editText 中写入 3。我应该在底部的 textView 中看到 600 (200*3)。
我尝试编写函数，但它给出了这个错误：
09-15 12:19:48.418 15984-15984/com.example.merve.tev E/androidRuntime: FATAL EXCEPTION: main
Process: com.example.merve.tev, PID: 15984
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:5637)
at android.widget.CompoundButton.performClick(CompoundButton.java:122)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:5637)
at android.widget.CompoundButton.performClick(CompoundButton.java:122)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.NumberFormatException: For input string: ""
at java.lang.Integer.parseInt(Integer.java:533)
at java.lang.Integer.parseInt(Integer.java:556)
at com.example.merve.tev.GenelBagis.onRadioButtonClicked(GenelBagis.java:32)
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:5637)
at android.widget.CompoundButton.performClick(CompoundButton.java:122)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
我的班级：
public class GenelBagis extends AppCompatActivity
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_genel_bagis);
public void onRadioButtonClicked(View view)
// Is the button now checked?
Integer amount = 0 ;
Integer month = 0;
boolean checked = ((RadioButton) view).isChecked();
TextView textView7 = (TextView) findViewById(R.id.textView7);
EditText EditText = (EditText) findViewById(R.id.bootstrapEditText);
// Check which radio button was clicked
switch(view.getId())
case R.id.meslekLisesi:
if (checked)
month = Integer.parseInt( EditText.getText().toString() );;
amount = month * 200;
textView7.setText(amount);
break;
case R.id.YuksekOgrenim:
if (checked)
month = Integer.parseInt( EditText.getText().toString() );;
amount = month * 510;
textView7.setText(amount);
break;
case R.id.YuksekLisans:
if (checked)
month = Integer.parseInt( EditText.getText().toString() );;
amount = month * 850;
textView7.setText(amount);
break;
case R.id.Doktora:
if (checked)
month = Integer.parseInt( EditText.getText().toString() );;
amount = month * 1150;
textView7.setText(amount);
break;
我的 xml：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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_
android:layout_
tools:context="com.example.merve.tev.GenelBagis"
tools:layout_editor_absoluteY="81dp"
tools:layout_editor_absoluteX="0dp">
<com.beardedhen.androidbootstrap.BootstrapEditText
android:layout_
android:layout_
app:bootstrapSize="md"
app:bootstrapBrand="info"
android:id="@+id/bootstrapEditText"
tools:layout_constraintTop_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintBottom_creator="1"
android:layout_marginStart="16dp"
app:layout_constraintBottom_toBottomOf="@+id/textView4"
android:layout_marginEnd="24dp"
app:layout_constraintRight_toRightOf="@+id/textView3"
android:layout_marginTop="38dp"
tools:layout_constraintLeft_creator="1"
android:layout_marginBottom="36dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/textView3"
android:layout_marginLeft="16dp"
android:layout_marginRight="24dp" />
<TextView
android:id="@+id/textView3"
android:layout_
android:layout_
android:layout_weight="1"
android:text="Kaç Aylık Burs Vermek İstersiniz?"
tools:layout_constraintTop_creator="1"
android:layout_marginStart="16dp"
android:layout_marginTop="44dp"
app:layout_constraintTop_toBottomOf="@+id/radioGroup"
tools:layout_constraintLeft_creator="1"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="16dp" />
<TextView
android:id="@+id/textView4"
android:layout_
android:layout_
android:text="Burs Vermek İstediğiniz Toplam Tutar"
tools:layout_constraintTop_creator="1"
tools:layout_constraintBottom_creator="1"
android:layout_marginStart="16dp"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginTop="126dp"
app:layout_constraintTop_toBottomOf="@+id/radioGroup"
tools:layout_constraintLeft_creator="1"
android:layout_marginBottom="124dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="16dp"
/>
<RadioGroup
android:id="@+id/radioGroup"
android:layout_
android:layout_
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="116dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintTop_creator="1">
<RadioButton
android:id="@+id/meslekLisesi"
android:layout_
android:layout_
android:onClick="onRadioButtonClicked"
android:text="Meslek Lisesi (Aylık) 200 TL" />
<RadioButton
android:id="@+id/YuksekOgrenim"
android:layout_
android:layout_
android:onClick="onRadioButtonClicked"
android:text="Yüksek Öğrenim (Aylık) 510 TL" />
<RadioButton
android:id="@+id/YuksekLisans"
android:layout_
android:layout_
android:onClick="onRadioButtonClicked"
android:text="Yüksek Lisans (Aylık) 850 TL" />
<RadioButton
android:id="@+id/Doktora"
android:layout_
android:layout_
android:onClick="onRadioButtonClicked"
android:text="Doktora (Aylık) 1150 TL" />
</RadioGroup>
<TextView
android:id="@+id/textView7"
android:layout_
android:layout_
android:text="TextView"
tools:layout_constraintTop_creator="1"
tools:layout_constraintBottom_creator="1"
android:layout_marginStart="16dp"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginTop="69dp"
app:layout_constraintTop_toBottomOf="@+id/bootstrapEditText"
tools:layout_constraintLeft_creator="1"
android:layout_marginBottom="74dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="16dp" />
</android.support.constraint.ConstraintLayout>
如何在没有任何按钮的情况下在TextView中看到radio Button值和EditText值的乘积？
【问题讨论】：
添加完整的堆栈跟踪和更多代码month = Integer.parseInt( EditText.getText().toString() ); 试试month = Integer.parseInt( EditText.getText().toString()replaceAll("[^0-9]", "") );
【参考方案1】：
尝试为 RadioButton Click 事件执行此操作
radio1.setOnCheckedChangeListener(this);
radio2.setOnCheckedChangeListener(this);
radio3.setOnCheckedChangeListener(this);
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
switch (buttonView.getId())
case R.id.radio1:
if(isChecked)
break;
case R.id.radio2:
if(isChecked)
break;
case R.id.radio3:
if(isChecked)
break;
【讨论】：
【参考方案2】：试试onChekedChangeListener()
radioBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener()
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
);
【讨论】：
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