[Android] Shared Preference 총정리 - 배열, 비트맵 까지

#사용

PreferenceManager.setString(Context, "your key", "data");

PreferenceManager.setStringArrayList(Context, "your key", ArrayList<String> yourData);

 

Bitmap loaded_image = PreferenceManager.getBitmap(Context, "your key");

PreferenceManager.clear(Context); // 다 삭제

package com.chana.footprint.data;

import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;

import org.json.JSONArray;
import org.json.JSONException;

import java.io.ByteArrayOutputStream;
import java.util.ArrayList;

public class PreferenceManager {
    public static final String PREFERENCES_NAME = "rebuild_preference";
    private static final String DEFAULT_VALUE_STRING = "";
    private static final boolean DEFAULT_VALUE_BOOLEAN = false;
    private static final int DEFAULT_VALUE_INT = 0;
    private static final long DEFAULT_VALUE_LONG = -1L;
    private static final float DEFAULT_VALUE_FLOAT = -1F;

    private static SharedPreferences getPreferences(Context context) {
        return context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_PRIVATE);
    }

    /**
     * String 값 저장
     * @param context
     * @param key
     * @param value
     */
    public static void setString(Context context, String key, String value) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putString(key, value);
        editor.commit();
    }

    /**
     * String Array List 값 저장
     * @param context
     * @param key
     * @param values
     */
    public static void setStringArrayList(Context context, String key, ArrayList<String> values) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor editor = prefs.edit();
        JSONArray a = new JSONArray();
        for (int i = 0; i < values.size(); i++) {
            a.put(values.get(i));
        }
        if (!values.isEmpty()) {
            editor.putString(key, a.toString());
        } else {
            editor.putString(key, null);
        }
        editor.commit();
    }

    /**
     * bitmap 값 저장
     * @param context
     * @param key
     * @param bitmap
     */
    public static void setBitmap(Context context, String key, Bitmap bitmap){
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG,30,baos);
        byte [] b= baos.toByteArray();
        String temp = Base64.encodeToString(b,Base64.DEFAULT);
        setString(context,key,temp);
    }

    /**
     * boolean 값 저장
     * @param context
     * @param key
     * @param value
     */
    public static void setBoolean(Context context, String key, boolean value) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putBoolean(key, value);
        editor.commit();
    }


    /**
     * int 값 저장
     * @param context
     * @param key
     * @param value
     */
    public static void setInt(Context context, String key, int value) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putInt(key, value);
        editor.commit();
    }



    /**
     * long 값 저장
     * @param context
     * @param key
     * @param value
     */
    public static void setLong(Context context, String key, long value) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putLong(key, value);
        editor.commit();
    }


    /**
     * float 값 저장
     * @param context
     * @param key
     * @param value
     */
    public static void setFloat(Context context, String key, float value) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putFloat(key, value);
        editor.commit();
    }

    /**
     * String 값 로드
     * @param context
     * @param key
     * @return
     */
    public static String getString(Context context, String key) {
        SharedPreferences prefs = getPreferences(context);
        String value = prefs.getString(key, DEFAULT_VALUE_STRING);
        return value;
    }

    /**
     * String Array List 값 로드
     * @param context
     * @param key
     * @return
     */
    public static ArrayList<String> getStringArrayList(Context context, String key) {
        SharedPreferences prefs = getPreferences(context);
        String json = prefs.getString(key, null);
        ArrayList<String> values = new ArrayList<String>();
        if (json != null) {
            try {
                JSONArray a = new JSONArray(json);
                for (int i = 0; i < a.length(); i++) {
                    String value = a.optString(i);
                    values.add(value);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
        return values;
    }

    /**
     * bitmap 값 로드
     * @param context
     * @param key
     * @return
     */
    public static Bitmap getBitmap(Context context, String key){
        String temp = getString(context, key);
        try{
            byte [] encodeByte = Base64.decode(temp, Base64.DEFAULT);
            Bitmap bitmap = BitmapFactory.decodeByteArray(encodeByte,0,encodeByte.length);
            return bitmap;
        } catch (Exception e){
            return null;
        }
    }

    /**
     * boolean 값 로드
     * @param context
     * @param key
     * @return
     */
    public static boolean getBoolean(Context context, String key) {
        SharedPreferences prefs = getPreferences(context);
        boolean value = prefs.getBoolean(key, DEFAULT_VALUE_BOOLEAN);
        return value;
    }



    /**
     * int 값 로드
     * @param context
     * @param key
     * @return
     */
    public static int getInt(Context context, String key) {
        SharedPreferences prefs = getPreferences(context);
        int value = prefs.getInt(key, DEFAULT_VALUE_INT);
        return value;
    }

    /**
     * long 값 로드
     * @param context
     * @param key
     * @return
     */
    public static long getLong(Context context, String key) {
        SharedPreferences prefs = getPreferences(context);
        long value = prefs.getLong(key, DEFAULT_VALUE_LONG);
        return value;
    }

    /**
     * float 값 로드
     * @param context
     * @param key
     * @return
     */
    public static float getFloat(Context context, String key) {
        SharedPreferences prefs = getPreferences(context);
        float value = prefs.getFloat(key, DEFAULT_VALUE_FLOAT);
        return value;
    }

    /**
     * 키 값 삭제
     * @param context
     * @param key
     */
    public static void removeKey(Context context, String key) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor edit = prefs.edit();
        edit.remove(key);
        edit.commit();
    }

    /**
     * 모든 저장 데이터 삭제
     * @param context
     */
    public static void clear(Context context) {
        SharedPreferences prefs = getPreferences(context);
        SharedPreferences.Editor edit = prefs.edit();
        edit.clear();
        edit.commit();
    }
}