工具类基本功能说明：
1、保存基本数据类型数据；
2、读取基本数据类型数据；
3、依据key删除对应value；
4、清除SharedPreferences缓存数据静态方法；
package helper;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.text.TextUtils;
public class SharedPreferenceHelper {
public static final String SHARED_PREFERENCES = "Study";
/**
* 保存基本数据类型的数据
* @param context
* @param key
* @param value
*/
@SuppressLint("CommitPrefEdits")
public static void saveValue(Context context, String key, Object value) {
SharedPreferences.Editor editor = context.getSharedPreferences(SHARED_PREFERENCES, 0).edit();
if (!TextUtils.isEmpty(key) && value != null) {
if (value instanceof String) {
editor.putString(key, (String)value);
} else if (value instanceof Integer) {
editor.putInt(key, (Integer) value);
} else if (value instanceof Long) {
editor.putLong(key, (Long) value);
} else if (value instanceof Float) {
editor.putFloat(key, (Float) value);
} else if (value instanceof Boolean) {
editor.putBoolean(key, (Boolean)value);
}
}
}
/**
* 读取基本数据类型的数据
* @param context
* @param key
* @param classT
* @return
*/
@SuppressWarnings("unchecked")
public static <T> T getValue(Context context, String key, Class<T> classT) {
SharedPreferences sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES, 0);
if (!TextUtils.isEmpty(key) && classT != null) {
String className = classT.getSimpleName();
if ("String".equals(className)) {
return (T) sharedPreferences.getString(key, null);
} else if ("Integer".equals(className)) {
return (T) Integer.valueOf(sharedPreferences.getInt(key, -1));
} else if ("Long".equals(className)) {
return (T) Long.valueOf(sharedPreferences.getLong(key, -1));
} else if ("Float".equals(className)) {
return (T) Float.valueOf(sharedPreferences.getFloat(key, -1));
} else if ("Boolean".equals(className)) {
return (T) Boolean.valueOf(sharedPreferences.getBoolean(key, false));
}
}
return null;
}
/**
* 删除值
* @param context
* @param key
*/
@SuppressLint("CommitPrefEdits")
public static void deleteValue(Context context, String key) {
SharedPreferences sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES, 0);
Editor editor = sharedPreferences.edit();
editor.remove(key);
}
/**
* 清除缓存数据
* @param context
*/
@SuppressLint("CommitPrefEdits")
public static void clearData(Context context) {
SharedPreferences sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES, 0);
Editor editor = sharedPreferences.edit();
editor.clear();
}
}