标签：ar os java sp for 文件 问题 bs ad
============问题描述============
public void save() {
// 获取搜索框信息
String text = auto.getText().toString();
boolean add=true;
SharedPreferences mysp = getSharedPreferences("search_history", 0);
String old_text = mysp.getString("history", "");
StringBuilder builder = new StringBuilder(old_text);
// 利用StringBuilder的append方法新增内容，逗号便于读取内容时用逗号拆分开
builder.append(text + ",");
//如何判断记录已经存在？
String[] history_arr = old_text.split(",");
for(int i = 0;i<history_arr.length;i++){
if(history_arr[i]==text){
add=false;
break;
}
}
if(add){
SharedPreferences.Editor myeditor = mysp.edit();
myeditor.putString("history", builder.toString());
myeditor.commit();
Toast.makeText(this, text+"添加成功", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(this, text+"已存在", Toast.LENGTH_SHORT).show();
}
}
============解决方案1============
============解决方案2============
怎么判断SharedPreferences 的某个记录已存在呢
标签：ar os java sp for 文件 问题 bs ad
原文地址：http://www.cnblogs.com/liangxieliang56/p/4089280.html
