Mega Code Archive
Listening to checked change events
<![CDATA[
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.apis.view;
import com.example.android.apis.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.RadioGroup;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.LinearLayout;
public class RadioGroup1 extends Activity implements RadioGroup.OnCheckedChangeListener,
View.OnClickListener {
private TextView mChoice;
private RadioGroup mRadioGroup;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.radio_group_1);
mRadioGroup = (RadioGroup) findViewById(R.id.menu);
// test adding a radio button programmatically
RadioButton newRadioButton = new RadioButton(this);
newRadioButton.setText(R.string.radio_group_snack);
newRadioButton.setId(R.id.snack);
LinearLayout.LayoutParams layoutParams = new RadioGroup.LayoutParams(
RadioGroup.LayoutParams.WRAP_CONTENT,
RadioGroup.LayoutParams.WRAP_CONTENT);
mRadioGroup.addView(newRadioButton, 0, layoutParams);
// test listening to checked change events
String selection = getString(R.string.radio_group_selection);
mRadioGroup.setOnCheckedChangeListener(this);
mChoice = (TextView) findViewById(R.id.choice);
mChoice.setText(selection + mRadioGroup.getCheckedRadioButtonId());
}
public void onCheckedChanged(RadioGroup group, int checkedId) {
String selection = getString(R.string.radio_group_selection);
String none = getString(R.string.radio_group_none);
mChoice.setText(selection +
(checkedId == View.NO_ID ? none : checkedId));
}
public void onClick(View v) {
mRadioGroup.clearCheck();
}
}
//layout/radio_group_1.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RadioGroup
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:checkedButton="@+id/lunch"
android:id="@+id/menu">
<RadioButton
android:text="@string/radio_group_1_breakfast"
android:id="@+id/breakfast"
/>
<RadioButton
android:text="@string/radio_group_1_lunch"
android:id="@id/lunch" />
<RadioButton
android:text="@string/radio_group_1_dinner"
android:id="@+id/dinner" />
<RadioButton
android:text="@string/radio_group_1_all"
android:id="@+id/all" />
<TextView
android:text="@string/radio_group_1_selection"
android:id="@+id/choice" />
</RadioGroup>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/radio_group_1_clear"
android:id="@+id/clear" />
</LinearLayout>
]]>