SharedPreferences 工具类------可存储图片

今天分享一个自己一直在使用SharedPreferences工具类，几乎可以满足开发中的全部需求了。

/** 
* SharedPreferences 工具类   
*/
public class SPUtils {	
    /**
    * 将图片保存到SharedPreferences	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param bitmap	 
    */	
    public static void saveBitmapToSharedPreferences(Context context, String preference,String key, Bitmap bitmap){		
        //第一步:将Bitmap压缩至字节数组输出流ByteArrayOutputStream		
        ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
	bitmap.compress(Bitmap.CompressFormat.PNG, 80, byteArrayOutputStream);		
        //第二步:利用Base64将字节数组输出流中的数据转换成字符串String		
        byte[] byteArray=byteArrayOutputStream.toByteArray();		
        String imageString=new String(Base64.encodeToString(byteArray, Base64.DEFAULT));		
        //第三步:将String保持至SharedPreferences		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);
	Editor editor = sharedPreferences.edit();		
        editor.putString(key, imageString);		
        editor.commit();	
    } 	
    /**	 
    * 从SharedPreferences取出图片	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param defaultValue	 
    * @return	 
    */	
    public static Bitmap getBitmapFromSharedPreferences(Context context,String preference, String key, String defaultValue){		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);
	//第一步:取出字符串形式的Bitmap		
        String imageString=sharedPreferences.getString(key,defaultValue);		
        if (imageString!=null){			
            //第二步:利用Base64将字符串转换为ByteArrayInputStream			
            byte[] byteArray= Base64.decode(imageString, Base64.DEFAULT);			
            ByteArrayInputStream byteArrayInputStream=new ByteArrayInputStream(byteArray);
	    //第三步:利用ByteArrayInputStream生成Bitmap			
            return BitmapFactory.decodeStream(byteArrayInputStream);		
        }else{			
            return null;		
        }	
    }	
    /**	 
     * 设置字符	  	 
     * @param context	 
     * @param preference	 
     * @param key	 
     * @param value	 
     */	
    public static void setStringPreferences(Context context, String preference,String key, String value) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);
	Editor editor = sharedPreferences.edit();		
        editor.putString(key, value);		
        editor.commit();	
    } 	
    /**	 
    * 获取字符	 	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param defaultValue	 
    * @return	 
    */	
    public static String getStringPreference(Context context,String preference, String key, String defaultValue) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);	
	return sharedPreferences.getString(key, defaultValue);	
    } 	
    /**	 
    * 设置长整型	  	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param value	 
    */	
    public static void setLongPreference(Context context, String preference,String key, long value) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);		
        Editor editor = sharedPreferences.edit();		
        editor.putLong(key, value);		
        editor.commit();	
    } 	
    /**	 
    * 获取长整型	 	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param defaultValue	 
    * @return	 
    */	
    public static long getLongPreference(Context context, String preference,String key, long defaultValue) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);		
        return sharedPreferences.getLong(key, defaultValue);	
    } 	
    /**	 
    * 设置boolean类型	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param value	 
    */	
    public static void setBooleanPreferences(Context context,String preference, String key, boolean value) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);
        Editor editor = sharedPreferences.edit();		
        editor.putBoolean(key, value);		
        editor.commit();	
    } 	
    /**	 
    * 获取长整型	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param defaultValue	 
    * @return	 
    */	
    public static boolean getBooleanPreference(Context context,String preference, String key, boolean defaultValue) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);		
        return sharedPreferences.getBoolean(key, defaultValue);	
    } 	
    /**	 
    * 设置int	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param value	 
    */	
    public static void setIntPreferences(Context context, String preference,String key, int value) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);		
        Editor editor = sharedPreferences.edit();		
        editor.putInt(key, value);		
        editor.commit();	
    } 	
    /**	 
    * 获取int	 
    * @param context	 
    * @param preference	 
    * @param key	 
    * @param defaultValue	 
    * @return	 
    */	
    public static int getIntPreference(Context context, String preference,String key, int defaultValue) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);		
        return sharedPreferences.getInt(key, defaultValue);	
    } 	
    /**	 
    * 删除一个属性	  	 
    * @param context	 
    * @param preference	 
    * @param key	 
    */	
    public static void deletePrefereceKey(Context context, String preference,String key) {		
        SharedPreferences sharedPreferences = context.getSharedPreferences(preference, Context.MODE_PRIVATE);		
        Editor editor = sharedPreferences.edit();		
        editor.remove(key);		
        editor.commit();	
    } 
}