CheckBox Example2

string.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">Checkbox</string>

    <string name="action_settings">Settings</string>

    <string name="hello_world">Hello world!</string>

    <string name="Facebook">Facebook</string>

    <string name="Twitter">Twitter</string>

    <string name="Google">Google+</string>

    <string name="CheckedItems">CheckedItems</string>

</resources>

activity_main.xml

<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"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <CheckBox

        android:id="@+id/checkBox1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginLeft="64dp"

        android:layout_marginTop="48dp"

        android:text="@string/Facebook"

        />

    <CheckBox

        android:id="@+id/checkBox3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/checkBox2"

        android:layout_below="@+id/checkBox2"

        android:text="@string/Google" />

    <CheckBox

        android:id="@+id/checkBox2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/checkBox1"

        android:layout_below="@+id/checkBox1"

        android:text="@string/Twitter" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/checkBox3"

        android:layout_below="@+id/checkBox3"

        android:layout_marginTop="31dp"

        android:text="@string/CheckedItems" />

   

</RelativeLayout>

MainActivity.java

import android.os.Bundle;

import android.app.Activity;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.Toast;

public class MainActivity extends Activity {

       CheckBox facebook, twitter, google;

       Button button;

       String name;

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

              facebook = (CheckBox) findViewById(R.id.checkBox1);

              twitter = (CheckBox) findViewById(R.id.checkBox2);

              google = (CheckBox) findViewById(R.id.checkBox3);

              button = (Button) findViewById(R.id.button1);

              button.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View v) {

                           // TODO Auto-generated method stub

                           if (facebook.isChecked()) {

                                  name = "facebook\n";

                           }

                           if (twitter.isChecked()) {

                                  name = name + "twitter\n";

                           }

                           if (google.isChecked()) {

                                  name = name + "google+";

                           }

                           Toast.makeText(getApplicationContext(),

                                         "You have checked:\n" + name, Toast.LENGTH_LONG)

                                         .show();

                     }

              });

       }

}