缓存基础类
import android.content.Context;
import android.content.SharedPreferences;
public class CacheParam {
/**
- 得到缓存的值*/
public static boolean getkey(Context context,String key) {
//context.getSharedPreferences第一个参数文件名，第二个是设置访问权限 私有化 仅限本程序访问
SharedPreferences sharedPreferences = context.getSharedPreferences("setting", Context.MODE_PRIVATE);
//第一个参数是key 第二个参数为 找不到key 的时候的默认值
return sharedPreferences.getBoolean(key, false);
}
/** -
保存缓存值*/
public static void setkey(Context context,String key,boolean defaultvalue)
{
SharedPreferences sharedPreferences = context.getSharedPreferences("setting", Context.MODE_PRIVATE);
sharedPreferences.edit().putBoolean(key,defaultvalue).commit();
}
public static void setkeyforstring(Context context,String key,String string)
{
SharedPreferences sharedPreferences = context.getSharedPreferences("setting", Context.MODE_PRIVATE);
sharedPreferences.edit().putString(key,string).commit();}
public static String getkeyforstring(Context context,String key) {
//context.getSharedPreferences第一个参数文件名，第二个是设置访问权限 私有化 仅限本程序访问
SharedPreferences sharedPreferences = context.getSharedPreferences("setting", Context.MODE_PRIVATE);
//第一个参数是key 第二个参数为 找不到key 的时候的默认值
return sharedPreferences.getString(key, "");
}
public static void clear(Context context) {
SharedPreferences preferences = context.getSharedPreferences("setting", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.clear();editor.commit();}
}
基础类的调用
void getckpwd() {
if (checkBox.isChecked()) {
String struser = etname.getText().toString();
String strpwd = etpwd.getText().toString();
CacheParam.setkeyforstring(LogInActivity.this, "ischeck", "1");
CacheParam.setkeyforstring(LogInActivity.this, "username", struser);
CacheParam.setkeyforstring(LogInActivity.this, "userpwd", strpwd);
// Toast.makeText(getApplicationContext(), "1", Toast.LENGTH_SHORT).show();
} else {
CacheParam.clear(LogInActivity.this);
// Toast.makeText(getApplicationContext(), "0", Toast.LENGTH_SHORT).show();
}
}
String GetUser, GetPwd, GetCheck;
GetCheck = CacheParam.getkeyforstring(LogInActivity.this, "ischeck");
GetUser = CacheParam.getkeyforstring(LogInActivity.this, "username");
GetPwd = CacheParam.getkeyforstring(LogInActivity.this, "userpwd");
//java中判断字符串是否相同 不能用==
if (GetCheck.equals("1")) {
checkBox.setChecked(true);
if (GetUser != "") {
etname.setText(GetUser);
}
if (GetPwd != "") {
etpwd.setText(GetPwd);
}
} else {
checkBox.setChecked(false);
}