Android_ application layer _SharedPreferences singleton fast storage means

package com.huawei.framework.utils;


import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;


import com.huawei.se.BaseApplication;

//@author   zhanglong
public final class SharedPreferencesUtil {
private static SharedPreferencesUtil instance;
private SharedPreferences sharedPreferences = null;


private SharedPreferencesUtil() {
initSharedPreferences(BaseApplication.getAppContext());


}


public static SharedPreferencesUtil getInstance() {
if (null == instance) {
instance = new SharedPreferencesUtil();
}
return instance;
}


public void initSharedPreferences(Context context) {
sharedPreferences = context.getSharedPreferences("GCSharedPreferences", Context.MODE_MULTI_PROCESS);
}


public SharedPreferences getSharedPreferences() {


return sharedPreferences;
}


/**
* Save key
* 
* @Param key
* @param value
*/
public void saveStringValue(String key, String value) {
if (sharedPreferences == null) {
return;
}


Editor edit = sharedPreferences.edit();
edit.putString(key, value);
edit.commit();
}


/**
* Get String Value
* 
* @Param key
* @param defaultValue
* @return
*/
public String readStringValue(String key, String defaultValue) {
if (sharedPreferences == null) {
return defaultValue;
}
return sharedPreferences.getString(key, defaultValue);
}


/**
* Save key type Boolean
* 
* @Param key
* @param value
*/
public void saveBooleanValue(String key, boolean value) {
if (sharedPreferences == null) {
return;
}


Editor edit = sharedPreferences.edit();
edit.putBoolean(key, value);
edit.commit();
}


/**
* Get the boolean value
* 
* @Param key
* @param defaultValue
* @return
*/
public boolean readBooleanValue(String key, boolean defaultValue) {
if (sharedPreferences == null) {
return defaultValue;
}


return sharedPreferences.getBoolean(key, defaultValue);
}


/**
* Save key Int
* 
* @Param key
* @param value
*/
public void saveIntValue(String key, int value) {
if (sharedPreferences == null) {
return;
}


Editor edit = sharedPreferences.edit();
edit.putInt(key, value);
edit.commit();
}


/**
* Get float value
* 
* @Param key
* @param defaultValue
* @return
*/
public int readIntValue(String key, int defaultValue) {
if (sharedPreferences == null) {
return defaultValue;
}


return sharedPreferences.getInt(key, defaultValue);
}


/**
* Save key Float
* 
* @Param key
* @param value
*/
public void saveFloatValue(String key, Float value) {
if (sharedPreferences == null) {
return;
}


Editor edit = sharedPreferences.edit();
edit.putFloat(key, value);
edit.commit();
}


/**
* Get Float value
* 
* @Param key
* @param defaultValue
* @return
*/
public Float readFloatValue(String key, Float defaultValue) {
if (sharedPreferences == null) {
return defaultValue;
}


return sharedPreferences.getFloat(key, defaultValue);
}


/**
* Save key Long
* 
* @Param key
* @param value
*/
public void saveLongValue(String key, Long value) {
if (sharedPreferences == null) {
return;
}


Editor edit = sharedPreferences.edit();
edit.putLong(key, value);
edit.commit();
}


/**
* Get Long value
* 
* @Param key
* @param defaultValue
* @return
*/
public Long readLongValue(String key, Long defaultValue) {
if (sharedPreferences == null) {
return defaultValue;
}


return sharedPreferences.getLong(key, defaultValue);
}


/**
* Delete key
* 
* @Param key
* 
**/
public void deleteValue(String key) {


if (sharedPreferences.contains(key)) {
Editor edit = sharedPreferences.edit();
edit.remove(key);
edit.commit();
}
}

}

Singleton SP:

1 can store data more quickly and easily, conservation of resources;

2, using BaseApplication.getAppContext () SP avoid references context Activity, leading to memory leaks, global Context long life cycle, with the end of the main application process before release