如何在Android中使用SharedPreferences存储布尔值？

Question

我想保存布尔值,然后在if-else块中进行比较.

我目前的逻辑是:

boolean locked = true;
if (locked == true) {
    /* SETBoolean TO FALSE */
} else {
    Intent newActivity4 = new Intent(parent.getContext(), Tag1.class);
    startActivity(newActivity4);
}

如何保存已设置为false的布尔变量？

Answer 1

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(); 
Boolean statusLocked = prefs.edit().putBoolean("locked", true).commit();

如果你不关心返回值(状态),那么你应该使用.apply(),因为它的异步更快.

prefs.edit().putBoolean("locked", true).apply();

让他们回来使用

Boolean yourLocked = prefs.getBoolean("locked", false);

而false是失败或未设置时的默认值

在你的代码中它看起来像这样:

boolean locked = true;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(); 
if (locked) { 
//maybe you want to check it by getting the sharedpreferences. Use this instead if (locked)
// if (prefs.getBoolean("locked", locked) {
   prefs.edit().putBoolean("locked", true).commit();
} else {
   startActivity(new Intent(parent.getContext(), Tag1.class));
}