SharedPreferences的一个工具类,调用setParam就能保存String, Integer, Boolean, Float, Long类型的参数,同样调用getParam就能获取到保存在手机里面的数据
public class SharedPreferencesUtils {
/**
* 保存在手机里面的文件名
*/
private static final String FILE_NAME = "share_date";
/**
* 保存数据的方法,我们需要拿到保存数据的具体类型,然后根据类型调用不同的保存方法
* @param context
* @param key
* @param object
*/
public static void setParam(Context context , String key, Object object){
String type = object.getClass().getSimpleName();
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
if("String".equals(type)){
editor.putString(key, (String)object);
}
else if("Integer".equals(type)){
editor.putInt(key, (Integer)object);
}
else if("Boolean".equals(type)){
editor.putBoolean(key, (Boolean)object);
}
else if("Float".equals(type)){
editor.putFloat(key, (Float)object);
}
else if("Long".equals(type)){
editor.putLong(key, (Long)object);
}
editor.commit();
}
/**
* 得到保存数据的方法,我们根据默认值得到保存的数据的具体类型,然后调用相对于的方法获取值
* @param context
* @param key
* @param defaultObject
* @return
*/
public static Object getParam(Context context , String key, Object defaultObject){
String type = defaultObject.getClass().getSimpleName();
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
if("String".equals(type)){
return sp.getString(key, (String)defaultObject);
}
else if("Integer".equals(type)){
return sp.getInt(key, (Integer)defaultObject);
}
else if("Boolean".equals(type)){
return sp.getBoolean(key, (Boolean)defaultObject);
}
else if("Float".equals(type)){
return sp.getFloat(key, (Float)defaultObject);
}
else if("Long".equals(type)){
return sp.getLong(key, (Long)defaultObject);
}
return null;
}
}
保存数据:
SharedPreferencesUtils.setParam(this, "String", "123");
SharedPreferencesUtils.setParam(this, "int", 123);
SharedPreferencesUtils.setParam(this, "boolean", true);
SharedPreferencesUtils.setParam(this, "long", 123L);
SharedPreferencesUtils.setParam(this, "float", 1.23f);
获取数据:
SharedPreferencesUtils.getParam(TimerActivity.this, "String", "123");
SharedPreferencesUtils.getParam(TimerActivity.this, "int", 123);
SharedPreferencesUtils.getParam(TimerActivity.this, "boolean", false);
SharedPreferencesUtils.getParam(TimerActivity.this, "long", 123L);
SharedPreferencesUtils.getParam(TimerActivity.this, "float", 1.23f);
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