过程preference前值保存在Android的? [英] Process the value of preference before save in Android?
问题描述
我需要前隐窝我的密码保存到本地的android数据库。一切工作正常没有加密,我有preferences.xml等。我怎么能叫我改变preference值之后的函数的(如密码)?这是我的code:
I need to crypt my password before save it to local android database. Everything work fine without encryption, I have preferences.xml and so. How can I call a function after I change value of preference (for example, password) ? Here is my code:
public class Preferences extends PreferenceActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
// Get the custom preference
Preference customPref = (Preference) findPreference("pass");
customPref.setOnPreferenceChangeListener(new OnPreferenceChangeListener(){
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
String crypto = SimpleCrypto.encrypt("MYSECRETKEY", newValue.toString()); // encrypt
// Here is where I'm wrong, I guess.
SharedPreferences settings = getSharedPreferences("preferences", MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putString("pass", crypto);
editor.commit();
});
}
}
PS:喜欢这个,当我修改密码,它存储的密码不加密
P.S: Like this, when I change password, it stores password without encryption.
推荐答案
我通过扩展底座的EditText preference和加密/解密的密码,有没有这样的:
I did this by extending the base EditTextPreference and encrypting/decrypting the password there:
public class EncryptedEditTextPreference extends EditTextPreference {
public EncryptedEditTextPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public EncryptedEditTextPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
public EncryptedEditTextPreference(Context context) {
super(context);
}
@Override
public String getText() {
String value = super.getText();
return SecurityUtils.decrypt(value);
}
@Override
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
super.setText(restoreValue ? getPersistedString(null) : (String) defaultValue);
}
@Override
public void setText(String text) {
if (Utils.isStringBlank(text)) {
super.setText(null);
return;
}
super.setText(SecurityUtils.encrypt(text));
}
}
有一些要求,以我个人的事业,但我认为,code是什么,你需要做的pretty的清晰。
There are some calls to my personal utilities, but I think the code is pretty clear in what you need to do.
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