Structured Preferences : SharedPreferences « Core Class « Android

1. Android
2. Core Class
3. SharedPreferences

Structured Preferences

     

/* Copyright (c) 2008-2009 -- CommonsWare, LLC

   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.commonsware.android.prefs;

import android.app.Activity;
import android.os.Bundle;
import android.preference.PreferenceActivity;


public class EditPreferences extends PreferenceActivity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    addPreferencesFromResource(R.xml.preferences);
  }
}




//src\com\commonsware\android\prefs\StructuredPrefsDemo.java
/* Copyright (c) 2008-2009 -- CommonsWare, LLC

   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.commonsware.android.prefs;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;


public class StructuredPrefsDemo extends Activity {
  private static final int EDIT_ID = Menu.FIRST+2;
  
  private TextView checkbox=null;
  private TextView ringtone=null;
  private TextView checkbox2=null;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    
    checkbox=(TextView)findViewById(R.id.checkbox);
    ringtone=(TextView)findViewById(R.id.ringtone);
    checkbox2=(TextView)findViewById(R.id.checkbox2);
  }
  
  @Override
  public void onResume() {
    super.onResume();
    
    SharedPreferences prefs=PreferenceManager
                              .getDefaultSharedPreferences(this);
    
    checkbox.setText(new Boolean(prefs
                                  .getBoolean("checkbox", false))
                        .toString());
    ringtone.setText(prefs.getString("ringtone", "<unset>"));
    checkbox2.setText(new Boolean(prefs
                                  .getBoolean("checkbox2", false))
                        .toString());
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    menu.add(Menu.NONE, EDIT_ID, Menu.NONE, "Edit Prefs")
        .setIcon(R.drawable.misc)
        .setAlphabeticShortcut('e');

    return(super.onCreateOptionsMenu(menu));
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
      case EDIT_ID:
        startActivity(new Intent(this, EditPreferences.class));
        return(true);
    }

    return(super.onOptionsItemSelected(item));
  }
}


//res\layout\main.xml
<?xml version="1.0" encoding="utf-8"?>
<TableLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
>
  <TableRow>
    <TextView
        android:text="Checkbox:"
        android:paddingRight="5px"
    />
    <TextView android:id="@+id/checkbox"
    />
  </TableRow>
  <TableRow>
    <TextView
        android:text="Ringtone:"
        android:paddingRight="5px"
    />
    <TextView android:id="@+id/ringtone"
    />
  </TableRow>
  <TableRow>
    <TextView
        android:text="Checkbox #2:"
        android:paddingRight="5px"
    />
    <TextView android:id="@+id/checkbox2"
    />
  </TableRow>
</TableLayout>



//res\values\strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="app_name">StructuredPrefsDemo</string>
  <string name="checkbox">checkbox</string>
  <string name="ringtone">ringtone</string>
  <string name="checkbox2">checkbox2</string>
</resources>



//res\xml\preferences.xml
<PreferenceScreen
  xmlns:android="http://schemas.android.com/apk/res/android">
  <PreferenceCategory android:title="Simple Preferences">
    <CheckBoxPreference
      android:key="checkbox"
      android:title="Checkbox Preference"
      android:summary="Check it on, check it off"
    />
    <RingtonePreference
      android:key="ringtone"
      android:title="Ringtone Preference"
      android:showDefault="true"
      android:showSilent="true"
      android:summary="Pick a tone, any tone"
    />
  </PreferenceCategory>
  <PreferenceCategory android:title="Detail Screens">
    <PreferenceScreen
      android:key="detail"
      android:title="Detail Screen"
      android:summary="Additional preferences held in another page">
      <CheckBoxPreference
        android:key="checkbox2"
        android:title="Another Checkbox"
        android:summary="On. Off. It really doesn't matter."
      />
    </PreferenceScreen>
  </PreferenceCategory>
</PreferenceScreen>

   
    
    
    
    
  

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