Example of using CheckBoxPreference

- Create a xml file, to define the CheckBoxPreference, /res/xml/checkboxpref.xml.

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

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"

	android:key="checkbox_pref"

	android:title="Check Box Preferences">

<CheckBoxPreference

	android:key="pref_opt1"

	android:title="Opt 1"

	android:summary="option 1" 

	android:defaultValue="true"/>

<CheckBoxPreference

	android:key="pref_opt2"

	android:title="Opt 2"

	android:summary="option 2" />

<CheckBoxPreference

	android:key="pref_opt3"

	android:title="Opt 3"

	android:summary="option 3" />

<CheckBoxPreference

	android:key="pref_opt4"

	android:title="Opt 4"

	android:summary="option 4" />

</PreferenceScreen>

- Create a SetPreference.java extends PreferenceActivity, it simple call the function addPreferencesFromResource(R.xml.checkboxpref) in onCreate().

package com.AndroidCheckBoxPreference;



import android.os.Bundle;

import android.preference.PreferenceActivity;



public class SetPreference extends PreferenceActivity {



	@Override

	protected void onCreate(Bundle savedInstanceState) {

		// TODO Auto-generated method stub

		super.onCreate(savedInstanceState);

		addPreferencesFromResource(R.xml.checkboxpref);

	}



}

- Modify the layout main.xml to have a TextView to show the preferences, and a Button to start SetPreference.java.

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView  

    android:layout_width="fill_parent" 

    android:layout_height="wrap_content" 

    android:text="@string/hello"

    />

<TextView

	android:id="@+id/pref"  

    android:layout_width="fill_parent" 

    android:layout_height="wrap_content" 

    />

<Button

	android:id="@+id/setpref"  

    android:layout_width="fill_parent" 

    android:layout_height="wrap_content" 

    android:text="Set Preferences"

    />

</LinearLayout>

- Main code

package com.AndroidCheckBoxPreference;



import android.app.Activity;

import android.content.Intent;

import android.content.SharedPreferences;

import android.os.Bundle;

import android.preference.PreferenceManager;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;



public class AndroidCheckBoxPreferenceActivity extends Activity {

	

	TextView pref;

	Button setPref;

	

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

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

    	setPref = (Button)findViewById(R.id.setpref);

    	

    	setPref.setOnClickListener(new Button.OnClickListener(){



			@Override

			public void onClick(View arg0) {

				// TODO Auto-generated method stub

				Intent intent = new Intent(

						AndroidCheckBoxPreferenceActivity.this, 

						SetPreference.class);

				startActivityForResult(intent, 0);

			}});

        

    	checkPref();

    }

    

    private void checkPref(){

    	SharedPreferences myPref 

    	= PreferenceManager.getDefaultSharedPreferences(

    			AndroidCheckBoxPreferenceActivity.this);

    	String _pref = 

    			"Option 1: " +  myPref.getBoolean("pref_opt1", true) + "\n"

    			+ "Option 2: " +  myPref.getBoolean("pref_opt2", false) + "\n"

    			+ "Option 3: " +  myPref.getBoolean("pref_opt3", false) + "\n"

    			+ "Option 4: " +  myPref.getBoolean("pref_opt4", false);

    	

    	pref.setText(_pref);

    }



	@Override

	protected void onActivityResult(int requestCode, int resultCode, Intent data) {

		// TODO Auto-generated method stub

		super.onActivityResult(requestCode, resultCode, data);

		checkPref();

	}

}

- Modify AndroidManifest.xml to add activity of SetPreference.java

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

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

      package="com.AndroidCheckBoxPreference"

      android:versionCode="1"

      android:versionName="1.0">

    <uses-sdk android:minSdkVersion="4" />



    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".AndroidCheckBoxPreferenceActivity"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

		<activity android:name=".SetPreference"/>

    </application>

</manifest>

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