Android CheckBox Tutorial

Checkbox application is use to allow to user to choose multiple item from given sets.

Example:

Like food application, where you can choose multiple food items.

Step 1.

Create new application with any name from file menu option.

File → New Project → Application name → select API → Add Blank Activity → Activity Name → finish.

Step 2.

In activity_main.xml layout file design your application.

Add following Controls:-

• Three Checkbox Controls.
• One Button Control.

Step 3.

Import Package and write following coding in MainActivity.java class file.

    
    import android.widget.CheckBox;
    import android.widget.Toast;
    import android.view.View;
    import android.widget.Button;
    
    public class MainActivity extends ActionBarActivity {

    Button b1;
    CheckBox c1,c2,c3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        b1=(Button)findViewById(R.id.button);
        c1=(CheckBox)findViewById(R.id.checkBox1);
        c2=(CheckBox)findViewById(R.id.checkBox2);
        c3=(CheckBox)findViewById(R.id.checkBox3);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(c1.isChecked() || c2.isChecked() || c3.isChecked()) {
    StringBuffer str = new StringBuffer();
    str.append("Java Application ").append(c1.isChecked());
    str.append("Window Application ").append(c2.isChecked());
    str.append("Android Application ").append(c3.isChecked());
    Toast.makeText(MainActivity.this, str.toString(),
    Toast.LENGTH_LONG).show();
    }
    else
    {
    Toast.makeText(MainActivity.this,"Please Tick on CheckBox",
    Toast.LENGTH_LONG).show();
    }
        }
        });

    }  
    

Step 4. Final Output