In my Android app I've got a couple radion buttons which should get a different color and become bold upon selection. I managed to get the different color by defining a radio_pick_color.xml file in drawable:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- checked -->
<item android:state_checked="true"
android:color="#00FF15" />
<!-- default -->
<item android:color="#4000FF" />
</selector>
and referencing this file in my main.xml file:
android:textColor="@drawable/radio_picker_color"
I now want to do the same for having the text bold. So I made another file called radio_picker_style.xml in which I wanted to define the style like this:
<item android:state_checked="true"
android:style="bold" />
Unfortunately eclipse complaints that no resource identifier can be found for attribute 'style' in package 'android'. I also tried with android:textStyle, but from within a selector item it also doesn't know the android:textStyle
attribute.
Does anybody know how I can get the selected radio button in bold?
==EDIT== The relevant part of my main.xml file:
<RadioGroup
android:id="@+id/radioGroup2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/option_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="@string/option_1"
android:textColor="@drawable/radio_picker_color"
/>
<RadioButton
android:id="@+id/option_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/option_2"
android:textColor="@drawable/radio_picker_color"
/>
</RadioGroup>
And the radio_picker_style.xml which I tried to put in drawable folder, but which says "Attribute is missing the Android namespace prefix":
<?xml version="1.0" encoding="utf-8"?>
<style name="mystyle">
<item name="android:textColor">#ffffff</item>
<item name="android:textStyle">bold</item>
</style>
The style has no selector: using one will either break the build/runtime or will have no effect and be neglected. There are only two types of selectors: for colors and for drawables.
So, there is only one option: apply bold style on the fly, possibly, by listening to check state changes.
=== Example ===
MainActivity.java:
package com.example.radiobuttontest;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Typeface;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
public class MainActivity extends Activity implements CompoundButton.OnCheckedChangeListener {
private RadioGroup mGroup2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGroup2 = (RadioGroup)findViewById(R.id.radioGroup2);
RadioButton button1 = (RadioButton)findViewById(R.id.option_1);
button1.setOnCheckedChangeListener(this);
}
@Override
protected void onResume() {
super.onResume();
RadioButton checked = (RadioButton)findViewById(mGroup2.getCheckedRadioButtonId());
checked.setTypeface(Typeface.DEFAULT_BOLD);
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
buttonView.setTypeface(isChecked ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT);
}
}
layout/activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/radioGroup2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/option_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="@string/option_1"
android:textColor="@drawable/radio_picker_color" />
<RadioButton
android:id="@+id/option_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/option_2"
android:textColor="@drawable/radio_picker_color" />
</RadioGroup>
drawable/radio_picker_color.xml [I changed colors you have used (they are very faint) in the question with "#0099CC" for demonstration purposes]:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- checked -->
<item android:state_checked="true"
android:color="#0099CC" />
<!-- default -->
<item android:color="#0099CC" />
</selector>
Result:
Hope this helps.