Android 以编程方式添加的单选按钮拒绝遵守LayoutParams权重
我试图在Android布局中创建一个Android 以编程方式添加的单选按钮拒绝遵守LayoutParams权重,android,user-interface,android-widget,android-listview,Android,User Interface,Android Widget,Android Listview,我试图在Android布局中创建一个RadioGroup，其中子RadioButton被拉伸，以均匀地填充RadioGroup的整个宽度。然而，我在尝试使用从代码中以编程方式添加的RadioButtons执行此操作时遇到了一些意外行为。首先是一些背景 什么有效 我从一个基于RelativeLayout的简单布局开始，它在底部包含一个大型TextView和一个RadioGroup main.xml布局文件如下所示： <?xml version="1.0" encoding="utf-8"?&
RadioGroupRadioButtonRadioGroupRadioButtonRelativeLayoutTextViewRadioGroup<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView android:text="Some text"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_alignParentTop="true"
android:layout_above="@+id/radio_group"
android:gravity="center"
android:background="@android:color/holo_green_dark"
/>
<RadioGroup android:id="@+id/radio_group"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
android:background="@android:color/holo_blue_dark">
<RadioButton android:text="Option 1"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_weight="1"
android:background="@android:color/darker_gray"
android:button="@android:color/transparent"
android:padding="10dp"
android:gravity="center"
android:layout_margin="2dp"/>
<RadioButton android:text="Option 2"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_weight="1"
android:background="@android:color/darker_gray"
android:button="@android:color/transparent"
android:padding="10dp"
android:gravity="center"
android:layout_margin="2dp"/>
</RadioGroup>
</RelativeLayout>
RadioButton<?xml version="1.0" encoding="utf-8"?>
<RadioButton xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="2dp"
android:layout_weight="1"
android:background="@android:color/darker_gray"
android:button="@android:color/transparent"
android:gravity="center"
android:padding="10dp" />
LayoutParamsRadioButtonRadioButton当以编程方式添加时，有人能建议如何使
RadioButton射线组的整个宽度吗？有什么明显的遗漏吗？设置布局权重时，应使用填充父项作为布局宽度。然后，在将单选按钮添加到射线组而不是简单的线性布局时，不应使用LinearLayout.LayoutParams，而应使用RadioGroup.LayoutParams
最后，当您使用充气器“构建”单选按钮时，单选按钮的XML文件已经具有从XML文件中选取的布局参数，因此我认为您应该调用addView方法，该方法只将要添加的视图作为参数（即addView（view v）
），并更改布局宽度以填充父视图
注意，如果您需要在代码中引用变量“button”，即添加一个click侦听器，那么您将只将侦听器添加到最后创建的按钮。您必须为要添加到RadioButton组的每个RadioButton（button、button1、button2等）创建一个RadioButton对象。FYI，这样做根本不需要任何xml
RadioGroup rgrp = new RadioGroup(context);
rgrp.setLayoutParams(new RadioGroup.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
rgrp.setOrientation(LinearLayout.HORIZONTAL);
mAccent = new RadioButton(context);
mAccent.setText("Accent");
mAccent.setLayoutParams(new RadioGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
rgrp.addView(mAccent);
mGhost = new RadioButton(context);
mGhost.setText( "Ghost");
mGhost.setLayoutParams(new RadioGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
rgrp.addView(mGhost);
mFlam = new RadioButton(context);
mFlam.setText( "Flam");
mFlam.setLayoutParams(new RadioGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
rgrp.addView(mFlam);
layout.addView(rgrp);
我也遇到了这个问题，我使用了定义了权重的RadioGroup.LayoutParams
。然而，我也发现，一旦我通过编程创建了按钮，按钮对触摸没有反应，所以将可点击和启用设置为真，这就解决了问题
private RadioButton createMyTypeRadioButton(MyType type){
//create using this constructor to use some of the style definitions
RadioButton radio = new RadioButton(this, null, R.style.MyRadioStyle);
RadioGroup.LayoutParams layoutParams = new RadioGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, 1f);
radio.setLayoutParams(layoutParams);
radio.setGravity(Gravity.CENTER);
//tag used by the setOnCheckedChangeListener to link the radio button with mytype object
radio.setTag(type.getId());
//enforce enabled and clickable status otherwise they ignore clicks
radio.setClickable(true);
radio.setEnabled(true);
radio.setText(type.getTitle());
return radio;
}
private void updateMyTypesUi() {
//populate RadioGroup with permitted my types
for (int i = 0; i < myTypes.size(); i++) {
MyType type = myTypes.get(i);
RadioButton radioButton = createSwapTypeRadioButton(type);
myRadioGrp.addView(radioButton);
}
myRadioGrp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioButton checkedType = (RadioButton) group.findViewById(checkedId);
String idOfMyTypeChecked = (String) checkedType.getTag();
//do something with idOfMyTypeChecked
}
});
}
private RadioButton创建MyTypeRadioButton（MyType类型）{
//使用此构造函数创建以使用某些样式定义
RadioButton单选=新的RadioButton（this，null，R.style.MyRadioStyle）；
RadioGroup.LayoutParams LayoutParams=新的RadioGroup.LayoutParams（ViewGroup.LayoutParams.WRAP_内容，ViewGroup.LayoutParams.WRAP_内容，1f）；
radio.setLayoutParams（layoutParams）；
无线电。设置重力（重力。中心）；
//setOnCheckedChangeListener用于将单选按钮链接到mytype对象的标记
setTag（type.getId（））；
//强制启用和可单击状态，否则它们将忽略单击
收音机。可点击设置（真）；
radio.setEnabled（真）；
radio.setText（type.getTitle（））；
回程无线电；
}
私有void updateMyTypesUi（）{
//使用允许的my类型填充RadioGroup
对于（int i=0；i
谢谢。更改为RadioGroup.LayoutParams修复了它-我没有意识到它是可用的。为什么我必须显式指定参数，而不是遵守我的xml参数？为什么这不像其他任何地方一样，需要我将layout\u width
设置为0dp
以使权重起作用？通过将父项与无线组的宽度进行匹配，效果很好。
RadioGroup rgrp = new RadioGroup(context);
rgrp.setLayoutParams(new RadioGroup.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
rgrp.setOrientation(LinearLayout.HORIZONTAL);
mAccent = new RadioButton(context);
mAccent.setText("Accent");
mAccent.setLayoutParams(new RadioGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
rgrp.addView(mAccent);
mGhost = new RadioButton(context);
mGhost.setText( "Ghost");
mGhost.setLayoutParams(new RadioGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
rgrp.addView(mGhost);
mFlam = new RadioButton(context);
mFlam.setText( "Flam");
mFlam.setLayoutParams(new RadioGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
rgrp.addView(mFlam);
layout.addView(rgrp);
private RadioButton createMyTypeRadioButton(MyType type){
//create using this constructor to use some of the style definitions
RadioButton radio = new RadioButton(this, null, R.style.MyRadioStyle);
RadioGroup.LayoutParams layoutParams = new RadioGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, 1f);
radio.setLayoutParams(layoutParams);
radio.setGravity(Gravity.CENTER);
//tag used by the setOnCheckedChangeListener to link the radio button with mytype object
radio.setTag(type.getId());
//enforce enabled and clickable status otherwise they ignore clicks
radio.setClickable(true);
radio.setEnabled(true);
radio.setText(type.getTitle());
return radio;
}
private void updateMyTypesUi() {
//populate RadioGroup with permitted my types
for (int i = 0; i < myTypes.size(); i++) {
MyType type = myTypes.get(i);
RadioButton radioButton = createSwapTypeRadioButton(type);
myRadioGrp.addView(radioButton);
}
myRadioGrp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioButton checkedType = (RadioButton) group.findViewById(checkedId);
String idOfMyTypeChecked = (String) checkedType.getTag();
//do something with idOfMyTypeChecked
}
});
}