[英]Android app login screen - wrong variable and shared preferences comparison
我正在尝试将加密的密码存储在应用程序的SharedPreferences中。 根据日志,密码已正确保存并在加密后与键入的密码匹配,但是在if比较中,它们不相等。 每次运行其他指令。 我找不到问题所在,因此我正在寻求帮助! BTW有什么更好,更安全的密码存储方式,甚至可以加密?
public class LoginActivity extends AppCompatActivity {
private static final String PREFERENCES_NAME = "passHashed";
private static final String PREFERENCES_TEXT_FIELD = "textField";
public EditText Password;
public TextView Info;
private String passSavedHash;
private SharedPreferences preferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Password = (EditText) findViewById(R.id.etPassword);
Info = (TextView) findViewById(R.id.Info);
Button loginBtn = findViewById(R.id.loginButton);
preferences = getSharedPreferences(PREFERENCES_NAME, AppCompatActivity.MODE_PRIVATE);
if(!passRead().equals("0")) {
passSavedHash = passRead();
Log.d("Password", "passHashed: " + passSavedHash);
}
else{
loginBtn.setText(R.string.set_pass);
}
}
public void onClickValidate(View view) throws Exception {
String password = Password.getText().toString();
String passHash = CipherAlgorithm.encrypt(password);
Log.d("Password", "passHashed: " + passSavedHash);
Log.d("Password", "passSavedHash: " + passHash);
if(passRead().equals("0") && password.length() > 3) {
passSave();
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
startActivity(intent);
}
else {
if (Objects.equals(passSavedHash, passHash)) {
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
startActivity(intent);
} else {
Info.setText(R.string.wron_pass);
}
}
Password.setText("");
}
private void passSave() throws Exception {
SharedPreferences.Editor preferencesEditor = preferences.edit();
String editTextData = CipherAlgorithm.encrypt(Password.getText().toString());
preferencesEditor.putString(PREFERENCES_TEXT_FIELD, editTextData);
preferencesEditor.commit();
}
private String passRead() {
return preferences.getString(PREFERENCES_TEXT_FIELD, "0");
}
}
好的,我知道了。 这是空白的问题。 我在密码字符串中添加了trim()方法,现在可以正常使用了!
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