如何将单选按钮添加到我以编程方式制作的单选组中? [英] How can I add radio buttons to a radio group I've made programmatically?
本文介绍了如何将单选按钮添加到我以编程方式制作的单选组中?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我对 Android 完全陌生
I am completely new to Android
我尝试了任何我认为可行的方法，但每次出现错误时.这里有什么问题吗?
i tried whatever I thought may work but everytime I get error. What's wrong here?
main_activity.xml
<LinearLayout 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"
android:padding="16dp"
tools:context=".Main"
android:orientation="vertical"
android:id="@+id/mainLayout">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton1" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton2" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton3" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton4" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton5" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton6" />
</LinearLayout>
</LinearLayout>
Main.java
public class Main extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
RadioButton rb1 = (RadioButton) findViewById(R.id.radioButton1);
RadioButton rb2 = (RadioButton) findViewById(R.id.radioButton2);
RadioButton rb3 = (RadioButton) findViewById(R.id.radioButton3);
RadioButton rb4 = (RadioButton) findViewById(R.id.radioButton4);
RadioButton rb5 = (RadioButton) findViewById(R.id.radioButton5);
RadioButton rb6 = (RadioButton) findViewById(R.id.radioButton6);
RadioGroup rg = new RadioGroup(this);
rg.addView(rb1);
rg.addView(rb2);
rg.addView(rb3);
rg.addView(rb4);
rg.addView(rb5);
rg.addView(rb6);
}
}
事实上，我正在尝试创建一个包含 3 列和 2 行的广播组，但是当我尝试这样做时，它不起作用:
in fact I am trying to make a radio group with 3 columns and 2 rows but as I tried it doesn't work when I do it like this:
main_activity.xml
<LinearLayout 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"
android:padding="16dp"
tools:context=".Main"
android:orientation="vertical"
android:id="@+id/mainLayout">
<RadioGroup
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton1" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton2" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton3" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton4" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton5" />
<RadioButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New RadioButton"
android:id="@+id/radioButton6" />
</LinearLayout>
</RadioGroup>
</LinearLayout>
我得到的最后一个解决方案是以编程方式在 Main.java 中创建一个无线电组，但它在 rg.addView() 方法上出错
the last solution I got is to make a radio group in Main.java programmatically but it makes an error on rg.addView() method
推荐答案
我找到了我的解决方案！
I've found my solution!
我创建了一个新的 RadioGroup 类，我可以将我的 RadioButton 放在一个组中，而不会破坏我的 main.xml 布局！
I created a new RadioGroup class which I can put my RadioButtons in a group without breaking my main.xml layout!
这是我刚刚创建的类:
import android.view.View;
import android.widget.RadioButton;
/**
* <p>
* CREATED:<br />
* 15 Aug 2015
* </p>
* <p>
* This class is created to make a RadioGroup
* with no limitation of designing and layouting.
* <br />
* <strong>
* The first method you have to call is
* <em>createRadioGroup ()</em> to
* initialize your RadioGroup.
* </strong>
* <br />
* Feel free to browse in the class
* and making change in it as you need.
* </p>
* @author ShahinSorkh
* @version 1
*/
public class RadioGroup2 {
// Global variables
private RadioButton rb [];
private int firstCheckedItemId;
public static int countRadioButtons;
/**
* <p>
* will initialize your RadioGroup
* </p>
* <p>
* <strong>an example:</strong>
* <p>
* RadioGroup2 rg = new RadioGroup2;<br />
* RadioButton rb [] = new RadioButton[3];<br />
* rb[0] = (RadioButton)findViewById(R.id.radio1);<br />
* rb[1] = (RadioButton)findViewById(R.id.radio2);<br />
* rb[2] = (RadioButton)findViewById(R.id.radio3);<br />
* rg.createRadioGroup(rb);
* </p>
* </p>
* @param radioButtons an Array of RadioButtons
*/
public void createRadioGroup(RadioButton [] radioButtons){
rb = radioButtons;
firstCheckedItemId = getCheckedItemId();
countRadioButtons = rb.length;
onCheck();
}
private void onCheck(){
for (RadioButton aRb : rb) {
aRb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View radio) {
final RadioButton myRb = (RadioButton) radio;
for (RadioButton aRb : rb) {
if (aRb.getId() == myRb.getId()) {
aRb.setChecked(true);
} else aRb.setChecked(false);
}
}
});
}
}
/**
* will count RadioButtons in your RadioGroup
* @return the count of RadioButtons in RadioGroup
*/
public int getRadioButtonsCount(){
return countRadioButtons;
}
/**
* <p>
* will return the checked item <strong>ID</strong>
* <em>you can use in findViewById() for example</em>
* </p>
* <p>
* will return <em>-1</em> if no RadioButton has checked<br />
* better to check if any button has checked
* </p>
* @return int checkedRadioButtonId
*/
public int getCheckedItemId (){
int id = -1;
for (RadioButton aRb : rb) {
if(aRb.isChecked())
id = aRb.getId();
}
return id;
}
/**
* <p>
* will return the checked <strong>RadioButton</strong>
* </p>
* <p>
* will return <em>null</em> if no RadioButton has checked<br />
* better to check if any button has checked
* </p>
* @return checked RadioButton directly
*/
public RadioButton getCheckedItem (){
RadioButton RB = null;
for (RadioButton aRb : rb) {
if(aRb.isChecked())
RB = aRb;
}
return RB;
}
/**
* will reset all RadioButtons checked state
* to default, all RadioButtons will unCheck
* and the firstChecked RadioButton will check
* at end
*/
public void resetButtons(){
RadioButton iRb = getCheckedItem();
if(iRb != null)
iRb.setChecked(false);
if(firstCheckedItemId != -1)
getChildById(firstCheckedItemId).setChecked(true);
}
private RadioButton getChildById(int id){
RadioButton iRb = null;
for (RadioButton aRb : rb ) {
if(aRb.getId() == id) {
iRb = aRb;
break;
}
}
return iRb;
}
/**
* <p>
* will return <strong>RadioButton</strong> at given index in the Array
* </p>
* @param position index of RadioButton in Array
* @return RadioButton[i]
*/
public RadioButton getChildAt (int position){
return rb[position];
}
}
并像这样创建我的 RadioGroup:
and create my RadioGroup like this:
RadioGroup2 rg = new RadioGroup2 ();
RadioButton [] rb = new RadioButton [3]();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rb[0] = (RadioButton) findViewById(R.id.rb1);
rb[1] = (RadioButton) findViewById(R.id.rb2);
rb[2] = (RadioButton) findViewById(R.id.rb3);
rg.createRadioGroup(rb);
...
}
我不知道是否需要更多的方法或行为，这个类正在按我的需要运行.
I don't know if more methods or behaviors is required or no, this class is acting as I needed.
感谢所有为此付出时间的人
thank everybody who took their time on this
这篇关于如何将单选按钮添加到我以编程方式制作的单选组中?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
