Android Open Source - android-sdk-samples Shared Prefs Handler

• Back to Development/sdk  ↑

From Project

Back to project page android-sdk-samples.

License

The source code is released under:

Apache License

Java Source Code

package io.snapback.plugin.data;
/*from w  ww  .j ava  2 s .c  o  m*/
import io.snapback.plugin.util.Constants;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.Log;

public class SharedPrefsHandler
{
  private SharedPreferences prefs;
  private static final String vers_key = "app_vers_key";

  public SharedPrefsHandler(Context ctx)
  {
    prefs = ctx.getSharedPreferences(Constants.preference_file_key, Context.MODE_PRIVATE);
    
    String last = prefs.getString(vers_key, null);
    int appVerCode = 0;
    String appVerName = "";
    
    try
    {
      appVerCode = ctx.getPackageManager().getPackageInfo(ctx.getPackageName(), 0).versionCode;
      appVerName = ctx.getPackageManager().getPackageInfo(ctx.getPackageName(), 0).versionName;
    }
    catch(NameNotFoundException e)
    {
      Log.e(SharedPrefsHandler.class.getSimpleName(), "Error: " + e.getMessage());
    }
    
    String curr = appVerCode + "_" + appVerName;
    
    if(last == null || !last.equalsIgnoreCase(curr))
    {
      clearAllData();
      write(vers_key, curr);
    }
  }
  
  public void clearAllData()
  {
    prefs.edit().clear();
    prefs.edit().commit();
  }
  
  /**
   * 
   * @param key String key
   * @param val Integer, Double (will converted to Float), Float, String, Boolean
   */
  public void write(String key, Object val)
  {
    if(key == null || val == null)
    {
      return;
    }
    
    Editor editor = null;
    
    if(val instanceof Long)
    {
      editor = prefs.edit();
      editor.putLong(key, (Long)val);
      editor.commit();
    }
    
    if(val instanceof Integer)
    {
      editor = prefs.edit();
      editor.putInt(key, (Integer)val);
      editor.commit();
    }
    
    if(val instanceof Double)
    {
      editor = prefs.edit();
      editor.putFloat(key, ((Double)val).floatValue());
      editor.commit();
    }
    
    if(val instanceof Float)
    {
      editor = prefs.edit();
      editor.putFloat(key, (Float)val);
      editor.commit();
    }
    
    if(val instanceof String)
    {
      editor = prefs.edit();
      editor.putString(key, (String)val);
      editor.commit();
    }
    
    if(val instanceof Boolean)
    {
      editor = prefs.edit();
      editor.putBoolean(key, (Boolean)val);
      editor.commit();
    }
  }
  
  public Float readFloat(String key)
  {
    if(key != null)
    {
      return prefs.getFloat(key, 0);
    }
    
    return null;
  }
  
  public Long readLong(String key)
  {
    if(key != null)
    {
      return prefs.getLong(key, 0);
    }
    
    return null;
  }
  
  public Integer readInteger(String key)
  {
    if(key != null)
    {
      return prefs.getInt(key, 0);
    }
    
    return null;
  }
  
  public Boolean readAsBoolean(String key)
  {
    if(key != null)
    {
      String s = readString(key);
      
      if(s != null)
      {
        return Boolean.parseBoolean(s);
      }
    }
    
    return null;
  }
  
  public Boolean readBooelan(String key)
  {
    if(key != null)
    {
      return prefs.getBoolean(key, false);
    }
    
    return null;
  }
  
  public String readString(String key)
  {
    if(key != null)
    {
      return prefs.getString(key, null);
    }
    
    return null;
  }
}

Java Source Code List

• Back to Development/sdk  ↑