问题
I am trying to prepare custom radiogroup like layout in the below image. I have nearly 8-10 rows to do that. So, I prepared one linear layout which has horizontal orientation and added the imageview, textview and radiobutton programatically.
So if I check on one radio button, the other radio buttons should automatically unchecked. Before going to that task itself, I got another problem that if my radio buttons are checked once, then the radio button are not uncheckable though clicked on them. Below is my code.
public class MainActivity extends Activity{
RadioButton[] radioBtns = new RadioButton[10];
String texts[] = {"text1", "text2", .... "text10"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
entireLayout = (LinearLayout)findViewById(R.id.main_layout);
for(int i =0; i<10; i++)
{
LinearLayout rowLayout=new LinearLayout(this);
radioBtns[i] = new RadioButton(this);
radioBtns[i].setId(i);
radioBtns[i].setOnCheckedChangeListener(cblistener);
ImageView imageView = new ImageView(this);
TextView tv = new TextView(this);
tv.setText(texts[i]);
rowLayout.addView(imageView);
rowLayout.addView(tv);
rowLayout.addView(radioBtns[i]);
entireLayout.addView(rowLayout);
View line = new View(this);
line.setBackgroundColor(getResources().getColor(R.color.horizontallinecolor));
entireLayout.addView(line, new ViewGroup.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, 1));
}
}
CompoundButton.OnCheckedChangeListener cblistener = new CompoundButton.OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton checkedbutton, boolean paramAnonymousBoolean)
{
switch (checkedbutton.getId())
{
case 0:
Log.d("tag", "checked 0th position");
break;
..........................
..........................
}
}
};
}
I have observed through keeping logs. The control enters onCheckedChanged() for the first time when those are getting checked, but not when unchecked. I wonder how those are uncheckable.
OR According to my requirement I have one more idea to prepare this layout like I prepare one more layout for the row in xml. Then inflating the view 10 times. But then also, how can I check only one radio button so that other selected one gets unchecked. Can someone please suggest me how to achieve this kind of radiogroup through the best way?
Note: I have kept my above code because to show what I have tried. If it is completely wrong way, please go easy and please suggest me how to get that done.
回答1:
In my experience is a little of a troublemaker to work with these kind of customized RadioGroups. I've prepared you some code that would be my approach to solve what you're trying to accomplish. Hope it works for you!
First you must call this function in your onCreate() (or wherever you're creating the views)
private void addRadioButtons() {
LinearLayout llGroup = (LinearLayout) findViewById(R.id.linearLayoutGroup);
for(int i=0; i<10; i++){
MyRadioButton mrb = new MyRadioButton(this);
mrb.setText(String.valueOf(i));
llGroup.addView(mrb.getView());
}
}
The class should be
private static class MyRadioButton implements View.OnClickListener{
private ImageView iv;
private TextView tv;
private RadioButton rb;
private View view;
public MyRadioButton(Context context) {
view = View.inflate(context, R.layout.my_radio_button, null);
rb = (RadioButton) view.findViewById(R.id.radioButton1);
tv = (TextView) view.findViewById(R.id.textView1);
iv = (ImageView) view.findViewById(R.id.imageView1);
view.setOnClickListener(this);
rb.setOnCheckedChangeListener(null);
}
public View getView() {
return view;
}
@Override
public void onClick(View v) {
boolean nextState = !rb.isChecked();
LinearLayout lGroup = (LinearLayout)view.getParent();
if(lGroup != null){
int child = lGroup.getChildCount();
for(int i=0; i<child; i++){
//uncheck all
((RadioButton)lGroup.getChildAt(i).findViewById(R.id.radioButton1)).setChecked(false);
}
}
rb.setChecked(nextState);
}
public void setImage(Bitmap b){
iv.setImageBitmap(b);
}
public void setText(String text){
tv.setText(text);
}
public void setChecked(boolean isChecked){
rb.setChecked(isChecked);
}
}
And the xml to inflate, something like:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
<RadioButton
android:id="@+id/radioButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
回答2:
A bit late to answer, but I meet with the same problem and out of frustration I wrote a new class called RadioGroupPlus to solve this problem, and I wanted to share.
The repo can be found here: https://github.com/worker8/RadioGroupPlus/
How to install
Add the library in your top level build.gradle:
allprojects {
repositories {
maven { url "https://jitpack.io" }
}
}
In your app/build.gradle, add this as dependency:
compile 'com.github.worker8:RadioGroupPlus:v1.0.1'
How to use
In your xml, wrap your custom layout with <worker8.com.github.radiogroupplus.RadioGroupPlus, such as:
<worker8.com.github.radiogroupplus.RadioGroupPlus
android:id="@+id/radio_group_plus"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout...>
<ImageView...>
<TextView...>
<RadioButton...>
</LinearLayout>
<LinearLayout...>
<ImageView...>
<TextView...>
<RadioButton...>
</LinearLayout>
<LinearLayout...>
<ImageView...>
<TextView...>
<RadioButton...>
</LinearLayout>
</worker8.com.github.radiogroupplus.RadioGroupPlus>
I leave out the details on purpose so that it's easier to read. I wrote more information about how to use RadioGroupPlus in the README page. Besides I also write a simple example of how to use it. So if you need to know more, you can learn more in the RadioGroupPlus repo.
Hope it helps!
回答3:
The tricky part is that you want the button to be on the right side.
To do that, in each button I deleted the original button and set the Right drawable as the button.
Nothing to say for the Left drawable.
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffff"
android:padding="8dp"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:padding="4dp"
>
<RadioGroup
android:layout_gravity="center_horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/rgOne"
>
<RadioButton
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/rdo1"
android:text="RadioButton 1"
android:button="@null"
android:drawableRight="@android:drawable/btn_radio"
android:drawableLeft="@drawable/ic_launcher"
android:checked="true"
android:onClick="onRadioButtonClicked"
/>
<RadioButton
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/rdo2"
android:text="RadioButton 2"
android:button="@null"
android:drawableRight="@android:drawable/btn_radio"
android:drawableLeft="@drawable/ic_launcher"
android:onClick="onRadioButtonClicked"
/>
<RadioButton
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/rdo3"
android:text="RadioButton 3"
android:button="@null"
android:drawableRight="@android:drawable/btn_radio"
android:drawableLeft="@drawable/ic_launcher"
android:onClick="onRadioButtonClicked"
/>
</RadioGroup>
</RelativeLayout>
</RelativeLayout>
And this is the code:
package com.example.aaa;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;
public class MainActivity
extends Activity
{
@Override
protected void onCreate(final Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// If you need to fire RadioButtonClick event:
onRadioButtonClicked(findViewById(R.id.rdo1));
// Otherwise, remove previous line
}
public final void onRadioButtonClicked(final View v)
{
String str = "1";
switch(v.getId())
{
case R.id.rdo1:
{
// do something
str = "1";
break;
}
case R.id.rdo2:
{
// do something
str = "2";
break;
}
case R.id.rdo3:
{
// do something
str = "3";
break;
}
default:
{
// do something
str = "that doesn' exist";
break;
}
}
Toast.makeText
(
getApplicationContext(), "RadioButton " + str, Toast.LENGTH_LONG
).show();
}
}
回答4:
I edited the layout removing the second part, which was useless for your purpose.
If you look at the layout, you will see what is the trick to put the button on the right.
This can be made in code, too, if you don't want to use the layout (why?)
Using my layout (without the need for a cusom class), the result you'd get is...
Quite similar to your goal, isn't it?
The tricky lines you'll want to replicate in your code (again, why?) are:
android:button="@null"
android:drawableRight="@android:drawable/btn_radio" // or your selector, with custom on/off pngs
android:drawableLeft="@drawable/ic_launcher" // or whatever
回答5:
It's not difficult to implement your custom RadioGroup class to fit your requirements. Also you can implement a custom RadioButton. Having custom components defined makes it easier to extend and bypass restrictions of default components.
I have described the process of creating a custom RadioGroup and a custom RadioButton in this tutorial. Also I have uploaded my code to Github.
回答6:
Answer by @Junior Buckeridge worked for me. I just want to add my 2 cents to that. In case if you have any clickable views in your linear layout make sure you add android:descendantFocusability="blocksDescendants" to your linear layout and android:focusable="false" to your view(Can be a button,Radio Button etc)
回答7:
I had the same layout as you but the number of rows in my case was limited by four. And I found out that the easiest way to make radioButtons work together is to use the simple method that will loop through array of radioButtons and check ALL of them OFF and then check ON the one which is needed.
And that's all folks (c)
You don't need to use regular RadioGroup neither creating custom radio group class, you don't need to setOnCheckChangedListeners.
final RadioButton radio1 = (RadioButton) findViewById(R.id.radio_1);
final RadioButton radio2 = (RadioButton) findViewById(R.id.radio_2);
final RadioButton radio3 = (RadioButton) findViewById(R.id.radio_3);
final RadioButton radio4 = (RadioButton) findViewById(R.id.radio_4);
final RadioButton[] radios = {radio1, radio2, radio3, radio4};
View.OnClickListener buttonListener = new View.OnClickListener(){
@Override
public void onClick(View v) {
for(RadioButton radio : radios){
radio.setChecked(false);
}
switch (v.getId()){
case R.id.button_1:
radio1.setChecked(true);
break;
case R.id.button_2:
radio2.setChecked(true);
break;
case R.id.button_3:
radio3.setChecked(true);
break;
case R.id.button_4:
radio4.setChecked(true);
break;
}
}
};
RelativeLayout button1 = (RelativeLayout) findViewById(R.id.button_1);
button1.setOnClickListener(buttonListener);
RelativeLayout button2 = (RelativeLayout) findViewById(R.id.button_2);
button2.setOnClickListener(buttonListener);
RelativeLayout button3 = (RelativeLayout) findViewById(R.id.button_3);
button3.setOnClickListener(buttonListener);
RelativeLayout button4 = (RelativeLayout) findViewById(R.id.button_4);
button4.setOnClickListener(buttonListener);
*Hint: Don't forget to set
android:text=""
android:checked="false"
android:clickable="false"
to your layout to each RadioButton. And set initial state programmatically for that radioButton which should be checked.
来源：https://stackoverflow.com/questions/20456322/preparing-customized-radio-group-type-of-layout