This activity is an example of a simple settings screen that has default values. : Activity « UI « Android

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This activity is an example of a simple settings screen that has default values.

     
 
/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.preference;

import com.example.android.apis.ApiDemosApplication;
import com.example.android.apis.R;

import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;

/**
 * This activity is an example of a simple settings screen that has default
 * values.
 * <p>
 * In order for the default values to be populated into the
 * {@link SharedPreferences} (from the preferences XML file), the client must
 * call
 * {@link PreferenceManager#setDefaultValues(android.content.Context, int, boolean)}.
 * <p>
 * This should be called early, typically when the application is first created.
 * This ensures any of the application's activities, services, etc. will have
 * the default values present, even if the user has not wandered into the
 * application's settings. For ApiDemos, this is {@link ApiDemosApplication},
 * and you can find the call to
 * {@link PreferenceManager#setDefaultValues(android.content.Context, int, boolean)}
 * in its {@link ApiDemosApplication#onCreate() onCreate}.
 */
public class DefaultValues extends PreferenceActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.default_values);
    }

}

//xml/default_values.xml


<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2008 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<!-- This is a primitive example showing how to set default values for preferences.
     See DefaultValues.java for more information. -->
<PreferenceScreen
        xmlns:android="http://schemas.android.com/apk/res/android">

    <CheckBoxPreference
            android:key="default_toggle"
            android:defaultValue="true"
            android:title="@string/title_checkbox_preference"
            android:summary="@string/summary_checkbox_preference" />

    <EditTextPreference
            android:key="default_edittext"
            android:defaultValue="@string/default_value_edittext_preference"
            android:title="@string/title_edittext_preference"
            android:summary="@string/summary_edittext_preference"
            android:dialogTitle="@string/dialog_title_edittext_preference" />
            
    <ListPreference
            android:key="default_list"
            android:defaultValue="@string/default_value_list_preference"
            android:title="@string/title_list_preference"
            android:summary="@string/summary_list_preference"
            android:entries="@array/entries_list_preference"
            android:entryValues="@array/entryvalues_list_preference"
            android:dialogTitle="@string/dialog_title_list_preference" />

</PreferenceScreen>

   
    
    
    
    
  

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