- Get selected RadioButton Id in RadioGroup.
- Set TextView TextColor using RadioGroup Buttons.
- Dynamic RadioGroup Creation in Android.
Step 1 : Select File -> New -> Project -> Android Application Project (or) Android Project. Fill the forms and click "Finish" button. If you have any doubt regarding create a new project Click Here.
Step 2 : Open res -> layout -> activity_main.xml (or) main.xml and add following code:
<RelativeLayout 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" >
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="48dp"
android:layout_marginTop="82dp" >
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="Hemanth" />
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Somaraju" />
<RadioButton
android:id="@+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gudivada" />
</RadioGroup>
</RelativeLayout>
Step 3 : Open src -> package -> MainActivity.java and add following code :
package com.gudivada.hemanthsomaraju;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Toast;
public class MainActivity extends Activity {
RadioGroup rg;
int pos;
int pos1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rg = (RadioGroup) findViewById(R.id.radioGroup1);
rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
// Method 1 For Getting Index of RadioButton
pos=rg.indexOfChild(findViewById(checkedId));
Toast.makeText(getBaseContext(), "Kakinada = "+String.valueOf(pos),
Toast.LENGTH_SHORT).show();
//Method 2 For Getting Index of RadioButton
pos1=rg.indexOfChild(findViewById(rg.getCheckedRadioButtonId()));
Toast.makeText(getBaseContext(), "India = "+String.valueOf(pos1),
Toast.LENGTH_SHORT).show();
switch (pos)
{
case 0 :
Toast.makeText(getBaseContext(), "You have Clicked Hemanth",
Toast.LENGTH_SHORT).show();
break;
case 1 :
Toast.makeText(getBaseContext(), "You have Clicked Somaraju",
Toast.LENGTH_SHORT).show();
break;
case 2 :
Toast.makeText(getBaseContext(), "You have Clicked Gudivada",
Toast.LENGTH_SHORT).show();
break;
default :
//The default selection is RadioButton 1
Toast.makeText(getBaseContext(),"You have Clicked Hemanth" ,
Toast.LENGTH_SHORT).show();
break;
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Step 4 : Open AndroidManifest.xml and add following code :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gudivada.hemanthsomaraju"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.gudivada.hemanthsomaraju.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Step 5 : Our output will be like this :
Step 1 : Select File -> New -> Project -> Android Application Project (or) Android Project. Fill the forms and click "Finish" button. If you have any doubt regarding create a new project Click Here.
Step 2 : Open res -> layout -> activity_main.xml (or) main.xml and add following code:
<RelativeLayout 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" >
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" >
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="Red" />
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Green" />
<RadioButton
android:id="@+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Blue" />
</RadioGroup>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="53dp" />
</RelativeLayout>
Step 3 : Open src -> package -> MainActivity.java and add following code :
package com.gudivada.hemanthsomaraju;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.RadioGroup.OnCheckedChangeListener;
public class MainActivity extends Activity {
RadioGroup rg;
RadioButton r1;
TextView t1;
int pos;
int pos1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rg= (RadioGroup) findViewById(R.id.radioGroup1);
t1=(TextView) findViewById(R.id.textView1);
t1.setText("Hemanth Somaraju");
t1.setTextSize(15);
r1=(RadioButton) findViewById(R.id.radio0);
r1.setChecked(false);
rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
//You can use any one of method...
// Method 1
pos=rg.indexOfChild(findViewById(checkedId));
//Method 2
pos1=rg.indexOfChild(findViewById(rg.getCheckedRadioButtonId()));
switch (pos)
{
case 0 :
r1.setChecked(true);
Toast.makeText(getBaseContext(), "You have Red Color",
Toast.LENGTH_SHORT).show();
t1.setTextColor(Color.RED);
break;
case 1 :
Toast.makeText(getBaseContext(), "You have Green Color",
Toast.LENGTH_SHORT).show();
t1.setTextColor(Color.GREEN);
break;
case 2 :
Toast.makeText(getBaseContext(), "You have Blue Color",
Toast.LENGTH_SHORT).show();
t1.setTextColor(Color.BLUE);
break;
default :
//The default selection is RadioButton 1
Toast.makeText(getBaseContext(),"You have Red Color" ,
Toast.LENGTH_SHORT).show();
t1.setTextColor(Color.RED);
break;
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Step 4 : Open AndroidManifest.xml and add following code :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gudivada.hemanthsomaraju"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.gudivada.hemanthsomaraju.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
3.Dynamic RadioGroup Creation in Android.
Step 1 : Select File -> New -> Project -> Android Application Project (or) Android Project. Fill the forms and click "Finish" button. If you have any doubt regarding create a new project Click Here.
Step 2 : Open res -> layout -> activity_main.xml (or) main.xml and add following code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/rl"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textView1"
android:textSize="20dp"
android:textColor="#FF0000"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
android:text="Dynamic RadioGroup" />
</RelativeLayout>
Step 3 : Open src -> package -> MainActivity.java and add following code :
package com.gudivada.hemanthsomaraju;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RelativeLayout;
import android.widget.Toast;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.RelativeLayout.LayoutParams;
public class MainActivity extends Activity {
RelativeLayout rl;
RadioGroup rg;
RadioButton rb1;
RadioButton rb2;
RadioButton rb3;
int pos;
int pos1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rl =(RelativeLayout) findViewById(R.id.rl);
rg = new RadioGroup(this);
rb1=new RadioButton(this);
rb2=new RadioButton(this);
rb3=new RadioButton(this);
rb1.setText("Hemanth");
rb2.setText("Somaraju");
rb3.setText("Gudivada");
rg.addView(rb1);
rg.addView(rb2);
rg.addView(rb3);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams
((int) LayoutParams.WRAP_CONTENT, (int) LayoutParams.WRAP_CONTENT);
params.leftMargin = 170;
params.topMargin = 180;
rg.setLayoutParams(params);
rl.addView(rg);
rb1.setChecked(true);
rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
//You can use any one of method...
// Method 1
pos=rg.indexOfChild(findViewById(checkedId));
//Method 2
pos1=rg.indexOfChild(findViewById(rg.getCheckedRadioButtonId()));
switch (pos)
{
case 0 :
Toast.makeText(getBaseContext(), "You have Clicked Hemanth",
Toast.LENGTH_SHORT).show();
break;
case 1 :
Toast.makeText(getBaseContext(), "You have Clicked Somaraju",
Toast.LENGTH_SHORT).show();
break;
case 2 :
Toast.makeText(getBaseContext(), "You have Clicked Gudivada",
Toast.LENGTH_SHORT).show();
break;
default :
//The default selection is RadioButton 1
Toast.makeText(getBaseContext(),"You have Clicked Hemanth" ,
Toast.LENGTH_SHORT).show();
break;
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Step 4 : Open AndroidManifest.xml and add following code :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gudivada.hemanthsomaraju"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.gudivada.hemanthsomaraju.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Step 5 : Our output will be like this :