如何根据给定的计数动态添加单选按钮？ [英] How to add radio button dynamically as per the given number of counts?

问题描述

我试过这个代码。当模拟器启动时，它会在一行显示三个单选按钮。但是我需要一个按钮事件。即：如果我点击按钮，它应该要求单选按钮的数量。那么如果我给出计数，它必须显示基于给定计数的单选按钮。例如，如果我将计数设置为3，它必须在一行中显示三个单选按钮。
您的帮助是非常感谢。
提前感谢。

  public class MyActivity extends Activity {
 / ** 
 *在第一次创建活动时调用。 
 * / 
 @Override 
 public void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.main）; 
 for（int row = 0; row< 1; row ++）
 {
 LinearLayout ll = new LinearLayout（this）; 
 ll.setOrientation（LinearLayout.HORIZONTAL）; 
 for（int i = 1; i <4; i ++）{
 RadioButton rdbtn = new RadioButton（this）; 
 rdbtn.setId（（row * 2）+ i）; 
 rdbtn.setText（Radio+ rdbtn.getId（））; 
 ll.addView（rdbtn）; 
} 
（（ViewGroup）findViewById（R.id.radiogroup））。addView（ll）; 
} 
} 
} 
  

这是xml

 <？xml version =1.0encoding =utf-8？ 
< RelativeLayout xmlns：android =http://schemas.android.com/apk/res/android
 xmlns：tools =http://schemas.android.com/tools
 android：layout_width =match_parent
 android：layout_height =match_parent
 tools：context =。MainActivity> 
 
< RadioGroup 
 android：id =@ + id / radiogroup
 android：orientation =vertical
 android：layout_width =wrap_content
 android：layout_height =wrap_content
 android：layout_centerHorizo​​ntal =true
 android：layout_centerVertical =true/> 
 
< / RelativeLayout> 
  

解决方案

请在下面找到代码， EditText'和xml布局中的'Button'。在EditText中输入一个数字，然后单击按钮，同样没有。

<$> p $ p> public class ActivityMain extends Activity {

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



final EditText editText =（EditText）findViewById（R.id.et_no）;

findViewById（R.id.btn）.setOnClickListener（new OnClickListener（）{

@Override
public void onClick（View v）{
// TODO自动生成方法存根


int number = Integer.parseInt（editText.getText（）。toString（））;
addRadioButtons（number）;
}
}）;

}

public void addRadioButtons（int number）{

for（int row = 0; row< 1; row ++）{
RadioGroup ll = new RadioGroup（this）;
ll.setOrientation（LinearLayout.HORIZONTAL）;

for（int i = 1; i <= number; i ++）{
RadioButton rdbtn = new RadioButton（this）;
rdbtn.setId（（row * 2）+ i）;
rdbtn.setText（Radio+ rdbtn.getId（））;
ll.addView（rdbtn）;
}
（（ViewGroup）findViewById（R.id.radiogroup））。addView（ll）;
}

}

}


，这里是您的布局文件。

 < RadioGroup 
 android：id =@ + id / radiogroup
 android：layout_width =wrap_content
 android：layout_height =wrap_content
 android：layout_centerHorizo​​ntal =true
 android：layout_centerVertical =true
 android：orientation =vertical/> 
 
 
 
< LinearLayout 
 android：layout_marginTop =20dp
 android：layout_marginLeft =20dp
 android：layout_height = wrap_content
 android：layout_width =match_parent> 
 
< EditText android：layout_height =wrap_content
 android：layout_width =wrap_content
 android：hint =Enter no。 
 android：inputType =number
 android：id =@ + id / et_no/> 
 
 
< Button 
 
 android：layout_height =wrap_content
 android：layout_width =wrap_content
 android：text =添加电台btn
 android：id =@ + id / btn/> 
< / LinearLayout> 
  

I have tried this code..It will display three radio buttons in a single row when the emulator starts. But I need a button event for this. i.e; if I click the button, it should ask for number of radio buttons. then If I give the count, it must display the radio buttons based on the count given. For example, If I give the count as 3, it must display the three radio buttons in a single row. Your help is highly appreciated. Thanks in advance.

  public class MyActivity extends Activity {
    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        for(int row=0; row < 1; row++)
        {
            LinearLayout ll = new LinearLayout(this);
            ll.setOrientation(LinearLayout.HORIZONTAL);
            for(int i = 1; i < 4; i++) {
                RadioButton rdbtn = new RadioButton(this);
                rdbtn.setId((row * 2) + i);
                rdbtn.setText("Radio " + rdbtn.getId());
                ll.addView(rdbtn);
            }
            ((ViewGroup)findViewById(R.id.radiogroup)).addView(ll);
        }
    }
    }

this is xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:context=".MainActivity" >

    <RadioGroup
            android:id="@+id/radiogroup"
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"/>

    </RelativeLayout>

解决方案

Please find below the code, I have created an 'EditText' and a 'Button' in the xml layout. Input a number in the 'EditText' and click the Button , The same no. of radio buttons will be added in the Layout.

This is your ActivityMain

public class ActivityMain extends Activity {

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



        final EditText editText=(EditText)findViewById(R.id.et_no);

        findViewById(R.id.btn).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub


                int number=Integer.parseInt(editText.getText().toString());
                addRadioButtons(number);
            }
        });

    }

    public void addRadioButtons(int number) {

    for (int row = 0; row < 1; row++) {
        RadioGroup ll = new RadioGroup(this);
        ll.setOrientation(LinearLayout.HORIZONTAL);

        for (int i = 1; i <= number; i++) {
            RadioButton rdbtn = new RadioButton(this);
            rdbtn.setId((row * 2) + i);
            rdbtn.setText("Radio " + rdbtn.getId());
            ll.addView(rdbtn);
        }
        ((ViewGroup) findViewById(R.id.radiogroup)).addView(ll);
    }

  }

}

and here is your layout file

<RadioGroup
    android:id="@+id/radiogroup"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:orientation="vertical" />



<LinearLayout
    android:layout_marginTop="20dp"
    android:layout_marginLeft="20dp"
    android:layout_height="wrap_content"
    android:layout_width="match_parent">

    <EditText android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:hint="Enter no."
        android:inputType="number"
        android:id="@+id/et_no"/>


    <Button

        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="Add Radio btn"
        android:id="@+id/btn"/>
</LinearLayout>

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