Example of using CheckBoxPreference
- Create a xml file, to define the CheckBoxPreference, /res/xml/checkboxpref.xml.
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| <?xml version="1.0" encoding="utf-8"?> 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().
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| 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.
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| <?xml version="1.0" encoding="utf-8"?> 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
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| 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
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| <?xml version="1.0" encoding="utf-8"?> 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>akmwww.cdacians.com |
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