Latihan Membuat Check Box dengan android eclipse portable

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/cbJava"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Java" />

    <CheckBox
        android:id="@+id/cbPhp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/cbJava"
        android:layout_below="@+id/cbJava"
        android:layout_marginTop="25dp"
        android:text="Php" />

    <Button
        android:id="@+id/bHasil"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/cbPhp"
        android:layout_below="@+id/cbPhp"
        android:layout_marginLeft="17dp"
        android:layout_marginTop="82dp"
        android:onClick="bHasilClick"
        android:text="Hasil" />

    <TextView
        android:id="@+id/tvHasilradio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/cbJava"
        android:layout_below="@+id/cbPhp"
        android:layout_marginTop="27dp"
        android:text="Pilih lalu klik Button"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

Graphical Layout

MainActivity.java

package com.checkbox;

import android.R.string;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.widget.CheckBox;

import android.widget.RadioGroup;

import android.widget.TextView;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

   

    public void bHasilClick(View v){

                TextView tvHasilradio = (TextView) findViewById(R.id.tvHasilradio);

                CheckBox cbJava = (CheckBox) findViewById(R.id.cbJava);

                CheckBox cbPhp = (CheckBox) findViewById(R.id.cbPhp);

               

                String s="";

                if (cbJava.isChecked()){

                                s ="Java";

                }

                if (cbPhp.isChecked()){

                                s = s + "PHP";

                }

                tvHasilradio.setText(s);

    }

}

Layout Running